/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package app

import (
        "fmt"
        "io"
        "os"
        "strings"
        "unicode/utf8"
)

type DbAttr struct {
        Key       string
        Preview   string
        Val       []byte
        Args      []string
        Tags      []string
        File      string
        Encrypted bool
        Binary    bool

        // conf flags, needed for incoming rest requests
        Fulltext bool
}

// check if value  is to be read  from a file or  stdin, setup preview
// text according to flags, lowercase key
func (attr *DbAttr) ParseKV() error {
        attr.Key = strings.ToLower(attr.Args[0])

        switch len(attr.Args) {
        case 1:
                // 1 arg = key + read from file or stdin
                if attr.File == "" {
                        attr.File = "-"
                }
        case 2:
                attr.Val = []byte(attr.Args[1])

                if attr.Args[1] == "-" {
                        attr.File = "-"
                }
        }

        if attr.File != "" {
                if err := attr.GetFileValue(); err != nil {
                        return err
                }
        }

        switch {
        case attr.Binary:
                attr.Preview = "<binary-content>"
        case attr.Encrypted:
                attr.Preview = "<encrypted-content>"
        default:
                if len(attr.Val) > MaxValueWidth {
                        attr.Preview = string(attr.Val)[0:MaxValueWidth] + "..."

                        if strings.Contains(attr.Preview, "\n") {
                                parts := strings.Split(attr.Preview, "\n")
                                if len(parts) > 0 {
                                        attr.Preview = parts[0]
                                }
                        }
                } else {
                        attr.Preview = string(attr.Val)
                }
        }

        return nil
}

func (attr *DbAttr) GetFileValue() error {
        var fd io.Reader

        if attr.File == "-" {
                stat, _ := os.Stdin.Stat()
                if (stat.Mode() & os.ModeCharDevice) == 0 {
                        fd = os.Stdin
                }
        } else {
                filehandle, err := os.OpenFile(attr.File, os.O_RDONLY, 0600)
                if err != nil {
                        return fmt.Errorf("failed to open file %s: %w", attr.File, err)
                }

                fd = filehandle
        }

        if fd != nil {
                // read from file or stdin pipe
                data, err := io.ReadAll(fd)
                if err != nil {
                        return fmt.Errorf("failed to read from pipe: %w", err)
                }

                // poor man's text file test
                attr.Val = data

                if utf8.ValidString(string(data)) {
                        attr.Binary = false
                } else {
                        attr.Binary = true
                }
        } else {
                // read from console stdin
                var input string
                var data string

                for {
                        _, err := fmt.Scanln(&input)
                        if err != nil {
                                break
                        }
                        data += input + "\n"
                }

                attr.Val = []byte(data)
        }

        return nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package app

import (
        "crypto/rand"
        "errors"
        "fmt"
        "log/slog"
        "os"
        "syscall"

        "golang.org/x/crypto/argon2"
        "golang.org/x/crypto/chacha20poly1305"
        "golang.org/x/term"
)

const (
        ArgonMem      uint32 = 64 * 1024
        ArgonIter     uint32 = 5
        ArgonParallel uint8  = 2
        ArgonSaltLen  int    = 16
        ArgonKeyLen   uint32 = 32
        B64SaltLen    int    = 16 //22
)

type Key struct {
        Salt []byte
        Key  []byte
}

// called from interactive thread, hides  input and returns clear text
// password
func AskForPassword() ([]byte, error) {
        fmt.Fprint(os.Stderr, "Password: ")
        pass, err := term.ReadPassword(int(syscall.Stdin))
        if err != nil {
                return nil, fmt.Errorf("failed to read password: %w", err)
        }

        fmt.Fprintln(os.Stderr)

        return pass, nil
}

// We're  using the  Argon2id  key derivation  algorithm  to derive  a
// secure  key from  the given  password. This  is important,  because
// users might  use unsecure  passwords. The resulting  encrypted data
// might of course easily be decrypted  using brute force methods if a
// weak password  was used, but  that would  cost, because of  the key
// derivation. It does several rounds  of hash calculations which take
// a considerable  amount of cpu  time. For  our legal user  that's no
// problem because it's being executed  only once, but an attacker has
// to do it in a forever loop, which will take a lot of time.
func DeriveKey(password []byte, salt []byte) (*Key, error) {
        if salt == nil {
                // none given, new password
                newsalt, err := GetRandom(ArgonSaltLen, ArgonSaltLen)
                if err != nil {
                        return nil, err
                }

                salt = newsalt
        }

        hash := argon2.IDKey(
                []byte(password), salt,
                ArgonIter,
                ArgonMem,
                ArgonParallel,
                ArgonKeyLen,
        )

        key := &Key{Key: hash, Salt: salt}

        slog.Debug("derived key", "key", string(key.Key), "salt", string(key.Salt))

        return key, nil
}

// Retrieve a random chunk of given size
func GetRandom(size int, capacity int) ([]byte, error) {
        buf := make([]byte, size, capacity)
        _, err := rand.Read(buf)
        if err != nil {
                return nil, fmt.Errorf("failed to retrieve random bytes: %w", err)
        }

        return buf, nil
}

// Encrypt clear  text given in  attr using ChaCha20  and auhtenticate
// using the mac Poly1305. The cipher text will be put into attr, thus
// modifying it.
//
// The cipher text consists of:
// password-salt) + (12 byte nonce + ciphertext + 16 byte mac)
func Encrypt(pass []byte, attr *DbAttr) error {
        key, err := DeriveKey(pass, nil)
        if err != nil {
                return err
        }

        aead, err := chacha20poly1305.New(key.Key)
        if err != nil {
                return fmt.Errorf("failed to create AEAD cipher: %w", err)
        }

        total := aead.NonceSize() + len(attr.Val) + aead.Overhead()

        nonce, err := GetRandom(aead.NonceSize(), total)
        if err != nil {
                return err
        }

        cipher := aead.Seal(nonce, nonce, attr.Val, nil)

        attr.Val = key.Salt
        attr.Val = append(attr.Val, cipher...)

        attr.Encrypted = true
        attr.Preview = "<encrypted-content>"

        slog.Debug("encrypted attr", "salt", string(key.Salt), "cipher", string(attr.Val))

        return nil
}

// Do the reverse
func Decrypt(pass []byte, cipherb []byte) ([]byte, error) {
        if len(cipherb) < B64SaltLen {
                return nil, fmt.Errorf("encrypted cipher block too small")
        }

        key, err := DeriveKey(pass, cipherb[0:B64SaltLen])
        if err != nil {
                return nil, err
        }

        cipher := cipherb[B64SaltLen:]

        aead, err := chacha20poly1305.New(key.Key)
        if err != nil {
                return nil, fmt.Errorf("failed to create AEAD cipher: %w", err)
        }

        if len(cipher) < aead.NonceSize() {
                return nil, errors.New("ciphertext too short")
        }

        nonce, ciphertext := cipher[:aead.NonceSize()], cipher[aead.NonceSize():]

        clear, err := aead.Open(nil, nonce, ciphertext, nil)
        if err != nil {
                return nil, err
        }

        slog.Debug("decrypted attr", "salt", string(key.Salt), "clear", string(clear))

        return clear, err
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package app

import (
        "encoding/json"
        "errors"
        "fmt"
        "log/slog"
        "os"
        "path/filepath"
        "regexp"
        "strings"
        "time"

        common "github.com/tlinden/anydb/common"

        bolt "go.etcd.io/bbolt"
        "google.golang.org/protobuf/proto"
        timestamppb "google.golang.org/protobuf/types/known/timestamppb"
)

const MaxValueWidth int = 60

type DB struct {
        Debug  bool
        Dbfile string
        Bucket string
        DB     *bolt.DB
}

type BucketInfo struct {
        Name     string
        Keys     int
        Size     int
        Sequence uint64
        Stats    bolt.BucketStats
}

type DbInfo struct {
        Buckets []BucketInfo
        Path    string
}

type DbEntries []*DbEntry

type DbTag struct {
        Keys []string `json:"key"`
}

func (entry *DbEntry) Taglist() string {
        return strings.Join(entry.Tags, ",")
}

const BucketData string = "data"

func GetDbFile(file string) string {
        if file != "" {
                return file
        }

        file = os.Getenv("ANYDB_DB")
        if file != "" {
                return file
        }

        home, err := os.UserHomeDir()
        if err != nil {
                panic(err)
        }

        return filepath.Join(home, ".config", "anydb", "default.db")
}

func New(file string, bucket string, debug bool) (*DB, error) {
        return &DB{Debug: debug, Dbfile: file, Bucket: bucket}, nil
}

func (db *DB) Open() error {
        slog.Debug("opening DB", "dbfile", db.Dbfile)

        if _, err := os.Stat(filepath.Dir(db.Dbfile)); os.IsNotExist(err) {
                if err := os.MkdirAll(filepath.Dir(db.Dbfile), 0700); err != nil {
                        return err
                }
        }

        var opts *bolt.Options

        if db.Debug {
                log := common.Slogger{Logger: slog.Default()}
                opts = &bolt.Options{Logger: log}
        }

        b, err := bolt.Open(db.Dbfile, 0600, opts)
        if err != nil {
                return fmt.Errorf("failed to open DB %s: %w", db.Dbfile, err)
        }

        db.DB = b
        return nil
}

func (db *DB) Close() error {
        return db.DB.Close()
}

func (db *DB) List(attr *DbAttr, fulltext bool) (DbEntries, error) {
        if err := db.Open(); err != nil {
                return nil, err
        }
        defer db.Close()

        var entries DbEntries
        var filter *regexp.Regexp

        if len(attr.Args) > 0 {
                // via cli
                filter = regexp.MustCompile(attr.Args[0])
        }

        if len(attr.Key) > 0 {
                // via api
                filter = regexp.MustCompile(attr.Key)
        }

        err := db.DB.View(func(tx *bolt.Tx) error {
                root := tx.Bucket([]byte(db.Bucket))
                if root == nil {
                        return nil
                }

                slog.Debug("opened root bucket", "root", root)

                bucket := root.Bucket([]byte("meta"))
                if bucket == nil {
                        return nil
                }

                slog.Debug("opened buckets", "root", root, "data", bucket)

                databucket := root.Bucket([]byte("data"))
                if databucket == nil {
                        return fmt.Errorf("failed to retrieve data sub bucket")
                }

                err := bucket.ForEach(func(key, pbentry []byte) error {
                        var entry DbEntry
                        if err := proto.Unmarshal(pbentry, &entry); err != nil {
                                return fmt.Errorf("failed to unmarshal from protobuf: %w", err)
                        }

                        if fulltext {
                                // avoid crash due to access fault
                                value := databucket.Get([]byte(entry.Key)) // empty is ok
                                vc := make([]byte, len(value))
                                copy(vc, value)
                                entry.Value = string(vc)
                        }

                        var include bool

                        switch {
                        case filter != nil:
                                if filter.MatchString(entry.Key) ||
                                        filter.MatchString(strings.Join(entry.Tags, " ")) {
                                        include = true
                                }

                                if !entry.Binary && !include && fulltext {
                                        if filter.MatchString(string(entry.Value)) {
                                                include = true
                                        }
                                }
                        case len(attr.Tags) > 0:
                                for _, search := range attr.Tags {
                                        for _, tag := range entry.Tags {
                                                if tag == search {
                                                        include = true
                                                        break
                                                }
                                        }

                                        if include {
                                                break
                                        }
                                }
                        default:
                                include = true
                        }

                        if include {
                                entries = append(entries, &entry)
                        }

                        return nil
                })

                return err
        })

        return entries, err
}

func (db *DB) Set(attr *DbAttr) error {
        if err := db.Open(); err != nil {
                return err
        }
        defer db.Close()

        entry := DbEntry{
                Key:       attr.Key,
                Binary:    attr.Binary,
                Tags:      attr.Tags,
                Encrypted: attr.Encrypted,
                Created:   timestamppb.Now(),
                Size:      uint64(len(attr.Val)),
                Preview:   attr.Preview,
        }

        // check if the  entry already exists and if yes,  check if it has
        // any  tags. if so,  we initialize  our update struct  with these
        // tags unless it has new tags configured.
        slog.Debug("+++ GET")
        oldentry, err := db.txGet(attr)
        if err != nil {
                if !strings.Contains(err.Error(), "no such key") {
                        return err
                }
        }
        
        if oldentry != nil {
                if len(oldentry.Tags) > 0 && len(entry.Tags) == 0 {
                        // initialize update entry with tags from old entry
                        entry.Tags = oldentry.Tags
                }
        }
        
        slog.Debug("+++ MARSHAL")
        // marshall our data
        pbentry, err := proto.Marshal(&entry)
        if err != nil {
                return fmt.Errorf("failed to marshall protobuf: %w", err)
        }

        slog.Debug("+++ UPDATE")
        err = db.DB.Update(func(tx *bolt.Tx) error {
                // create root bucket
                root, err := tx.CreateBucketIfNotExists([]byte(db.Bucket))
                if err != nil {
                        return fmt.Errorf("failed to create DB bucket: %w", err)
                }

                // create meta bucket
                bucket, err := root.CreateBucketIfNotExists([]byte("meta"))
                if err != nil {
                        return fmt.Errorf("failed to create DB meta sub bucket: %w", err)
                }

                slog.Debug("opened/created buckets", "root", root, "data", bucket)

                // write meta data
                err = bucket.Put([]byte(entry.Key), []byte(pbentry))
                if err != nil {
                        return fmt.Errorf("failed to insert data: %w", err)
                }

                // create data bucket
                databucket, err := root.CreateBucketIfNotExists([]byte("data"))
                if err != nil {
                        return fmt.Errorf("failed to create DB data sub bucket: %w", err)
                }

                // write value
                err = databucket.Put([]byte(entry.Key), attr.Val)
                if err != nil {
                        return fmt.Errorf("failed to insert data: %w", err)
                }

                return nil
        })

        if err != nil {
                return err
        }

        return nil
}

// internal DB getter, assumes db.DB has already been
// opened successfully. Do NOT call this w/o valid
// DB handle!
func (db *DB)txGet(attr *DbAttr) (*DbEntry, error) {
        entry := DbEntry{}

        err := db.DB.View(func(tx *bolt.Tx) error {
                // root bucket
                root := tx.Bucket([]byte(db.Bucket))
                if root == nil {
                        return nil
                }

                // get meta sub bucket
                bucket := root.Bucket([]byte("meta"))
                if bucket == nil {
                        return nil
                }

                slog.Debug("opened buckets", "root", root, "data", bucket)

                // retrieve meta data
                pbentry := bucket.Get([]byte(attr.Key))
                if pbentry == nil {
                        return fmt.Errorf("no such key: %s", attr.Key)
                }

                // put into struct
                if err := proto.Unmarshal(pbentry, &entry); err != nil {
                        return fmt.Errorf("failed to unmarshal from protobuf: %w", err)
                }

                // get data sub bucket
                databucket := root.Bucket([]byte("data"))
                if databucket == nil {
                        return fmt.Errorf("failed to retrieve data sub bucket")
                }

                // retrieve actual data value
                value := databucket.Get([]byte(attr.Key))
                if len(value) == 0 {
                        return fmt.Errorf("no such key: %s", attr.Key)
                }

                // we  need to make a  copy of it, otherwise  we'll get an
                // "unexpected fault address" error
                vc := make([]byte, len(value))
                copy(vc, value)

                entry.Value = string(vc)

                return nil
        })

        if err != nil {
                return nil, err
        }

        return &entry, nil
}

func (db *DB) Get(attr *DbAttr) (*DbEntry, error) {
        if err := db.Open(); err != nil {
                return nil, err
        }
        defer db.Close()

        entry, err := db.txGet(attr)

        if err != nil {
                return nil, fmt.Errorf("failed to read from DB: %w", err)
        }

        return entry, nil
}

func (db *DB) Del(attr *DbAttr) error {
        if err := db.Open(); err != nil {
                return err
        }
        defer db.Close()

        err := db.DB.Update(func(tx *bolt.Tx) error {
                // root bucket
                root := tx.Bucket([]byte(db.Bucket))
                if root == nil {
                        return nil
                }

                // get data sub bucket
                bucket := root.Bucket([]byte("meta"))
                if bucket == nil {
                        return nil
                }

                slog.Debug("opened buckets", "data", bucket)

                return bucket.Delete([]byte(attr.Key))
        })

        return err
}

func (db *DB) Import(attr *DbAttr) (string, error) {
        // open json file into attr.Val
        if err := attr.GetFileValue(); err != nil {
                return "", err
        }

        if len(attr.Val) == 0 {
                return "", errors.New("empty json file")
        }

        var entries DbEntries
        now := time.Now()
        newfile := db.Dbfile + now.Format("-02.01.2006T03:04.05")

        if err := json.Unmarshal([]byte(attr.Val), &entries); err != nil {
                return "", cleanError(newfile, fmt.Errorf("failed to unmarshal json: %w", err))
        }

        if fileExists(db.Dbfile) {
                // backup the old file
                err := os.Rename(db.Dbfile, newfile)
                if err != nil {
                        return "", fmt.Errorf("failed to rename file %s to %s: %w", db.Dbfile, newfile, err)
                }

        }

        // should now be a new db file
        if err := db.Open(); err != nil {
                return "", cleanError(newfile, err)
        }
        defer db.Close()

        err := db.DB.Update(func(tx *bolt.Tx) error {
                // create root bucket
                root, err := tx.CreateBucketIfNotExists([]byte(db.Bucket))
                if err != nil {
                        return fmt.Errorf("failed to create DB bucket: %w", err)
                }

                // create meta bucket
                bucket, err := root.CreateBucketIfNotExists([]byte("meta"))
                if err != nil {
                        return fmt.Errorf("failed to create DB meta sub bucket: %w", err)
                }

                slog.Debug("opened buckets", "root", root, "data", bucket)

                for _, entry := range entries {
                        pbentry, err := proto.Marshal(entry)
                        if err != nil {
                                return fmt.Errorf("failed to marshall protobuf: %w", err)
                        }

                        // write meta data
                        err = bucket.Put([]byte(entry.Key), []byte(pbentry))
                        if err != nil {
                                return fmt.Errorf("failed to insert data into DB: %w", err)
                        }

                        // create data bucket
                        databucket, err := root.CreateBucketIfNotExists([]byte("data"))
                        if err != nil {
                                return fmt.Errorf("failed to create DB data sub bucket: %w", err)
                        }

                        // write value
                        err = databucket.Put([]byte(entry.Key), []byte(entry.Value))
                        if err != nil {
                                return fmt.Errorf("failed to insert data: %w", err)
                        }
                }

                return nil
        })

        if err != nil {
                return "", cleanError(newfile, err)
        }

        return fmt.Sprintf("backed up database file to %s\nimported %d database entries\n",
                newfile, len(entries)), nil
}

func (db *DB) Info() (*DbInfo, error) {
        if err := db.Open(); err != nil {
                return nil, err
        }
        defer db.Close()

        info := &DbInfo{Path: db.Dbfile}

        err := db.DB.View(func(tx *bolt.Tx) error {
                err := tx.ForEach(func(name []byte, bucket *bolt.Bucket) error {
                        stats := bucket.Stats()

                        binfo := BucketInfo{
                                Name:     string(name),
                                Sequence: bucket.Sequence(),
                                Keys:     stats.KeyN,
                                Stats:    bucket.Stats(),
                        }

                        err := bucket.ForEach(func(key, entry []byte) error {
                                binfo.Size += len(entry) + len(key)

                                return nil
                        })
                        if err != nil {
                                return fmt.Errorf("failed to read keys: %w", err)
                        }

                        info.Buckets = append(info.Buckets, binfo)
                        return nil

                })

                if err != nil {
                        return fmt.Errorf("failed to read from DB: %w", err)
                }

                return nil

        })

        return info, err
}

func (db *DB) Getall(attr *DbAttr) (DbEntries, error) {
        if err := db.Open(); err != nil {
                return nil, err
        }
        defer db.Close()

        var entries DbEntries

        err := db.DB.View(func(tx *bolt.Tx) error {
                // root bucket
                root := tx.Bucket([]byte(db.Bucket))
                if root == nil {
                        return nil
                }

                // get meta sub bucket
                bucket := root.Bucket([]byte("meta"))
                if bucket == nil {
                        return nil
                }

                // get data sub bucket
                databucket := root.Bucket([]byte("data"))
                if databucket == nil {
                        return fmt.Errorf("failed to retrieve data sub bucket")
                }

                slog.Debug("opened buckets", "root", root, "data", bucket)

                // iterate over all db entries in meta sub bucket
                err := bucket.ForEach(func(key, pbentry []byte) error {
                        var entry DbEntry
                        if err := proto.Unmarshal(pbentry, &entry); err != nil {
                                return fmt.Errorf("failed to unmarshal from protobuf: %w", err)
                        }

                        // retrieve the value from the data sub bucket
                        value := databucket.Get([]byte(entry.Key))

                        // we  need to make a  copy of it, otherwise  we'll get an
                        // "unexpected fault address" error
                        vc := make([]byte, len(value))
                        copy(vc, value)

                        entry.Value = string(vc)
                        entries = append(entries, &entry)

                        return nil
                })

                return err
        })
        return entries, err
}

// -*-c++-*-

// Code generated by protoc-gen-go. DO NOT EDIT.
// versions:
//         protoc-gen-go v1.36.5
//         protoc        v4.24.4
// source: app/dbentry.proto

package app

import (
        protoreflect "google.golang.org/protobuf/reflect/protoreflect"
        protoimpl "google.golang.org/protobuf/runtime/protoimpl"
        timestamppb "google.golang.org/protobuf/types/known/timestamppb"
        reflect "reflect"
        sync "sync"
        unsafe "unsafe"
)

const (
        // Verify that this generated code is sufficiently up-to-date.
        _ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
        // Verify that runtime/protoimpl is sufficiently up-to-date.
        _ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
)

type DbEntry struct {
        state         protoimpl.MessageState `protogen:"open.v1"`
        Id            string                 `protobuf:"bytes,1,opt,name=Id,proto3" json:"Id,omitempty"`
        Key           string                 `protobuf:"bytes,2,opt,name=Key,proto3" json:"Key,omitempty"`
        Preview       string                 `protobuf:"bytes,3,opt,name=Preview,proto3" json:"Preview,omitempty"`
        Tags          []string               `protobuf:"bytes,4,rep,name=Tags,proto3" json:"Tags,omitempty"`
        Created       *timestamppb.Timestamp `protobuf:"bytes,5,opt,name=Created,proto3" json:"Created,omitempty"`
        Size          uint64                 `protobuf:"varint,6,opt,name=Size,proto3" json:"Size,omitempty"`
        Encrypted     bool                   `protobuf:"varint,7,opt,name=Encrypted,proto3" json:"Encrypted,omitempty"`
        Binary        bool                   `protobuf:"varint,8,opt,name=Binary,proto3" json:"Binary,omitempty"`
        Value         string                 `protobuf:"bytes,9,opt,name=Value,proto3" json:"Value,omitempty"`
        unknownFields protoimpl.UnknownFields
        sizeCache     protoimpl.SizeCache
}

func (x *DbEntry) Reset() {
        *x = DbEntry{}
        mi := &file_app_dbentry_proto_msgTypes[0]
        ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
        ms.StoreMessageInfo(mi)
}

func (x *DbEntry) String() string {
        return protoimpl.X.MessageStringOf(x)
}

func (*DbEntry) ProtoMessage() {}

func (x *DbEntry) ProtoReflect() protoreflect.Message {
        mi := &file_app_dbentry_proto_msgTypes[0]
        if x != nil {
                ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
                if ms.LoadMessageInfo() == nil {
                        ms.StoreMessageInfo(mi)
                }
                return ms
        }
        return mi.MessageOf(x)
}

// Deprecated: Use DbEntry.ProtoReflect.Descriptor instead.
func (*DbEntry) Descriptor() ([]byte, []int) {
        return file_app_dbentry_proto_rawDescGZIP(), []int{0}
}

func (x *DbEntry) GetId() string {
        if x != nil {
                return x.Id
        }
        return ""
}

func (x *DbEntry) GetKey() string {
        if x != nil {
                return x.Key
        }
        return ""
}

func (x *DbEntry) GetPreview() string {
        if x != nil {
                return x.Preview
        }
        return ""
}

func (x *DbEntry) GetTags() []string {
        if x != nil {
                return x.Tags
        }
        return nil
}

func (x *DbEntry) GetCreated() *timestamppb.Timestamp {
        if x != nil {
                return x.Created
        }
        return nil
}

func (x *DbEntry) GetSize() uint64 {
        if x != nil {
                return x.Size
        }
        return 0
}

func (x *DbEntry) GetEncrypted() bool {
        if x != nil {
                return x.Encrypted
        }
        return false
}

func (x *DbEntry) GetBinary() bool {
        if x != nil {
                return x.Binary
        }
        return false
}

func (x *DbEntry) GetValue() string {
        if x != nil {
                return x.Value
        }
        return ""
}

var File_app_dbentry_proto protoreflect.FileDescriptor

var file_app_dbentry_proto_rawDesc = string([]byte{
        0x0a, 0x11, 0x61, 0x70, 0x70, 0x2f, 0x64, 0x62, 0x65, 0x6e, 0x74, 0x72, 0x79, 0x2e, 0x70, 0x72,
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        0x69, 0x7a, 0x65, 0x18, 0x06, 0x20, 0x01, 0x28, 0x04, 0x52, 0x04, 0x53, 0x69, 0x7a, 0x65, 0x12,
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        0x74, 0x6f, 0x33,
})

var (
        file_app_dbentry_proto_rawDescOnce sync.Once
        file_app_dbentry_proto_rawDescData []byte
)

func file_app_dbentry_proto_rawDescGZIP() []byte {
        file_app_dbentry_proto_rawDescOnce.Do(func() {
                file_app_dbentry_proto_rawDescData = protoimpl.X.CompressGZIP(unsafe.Slice(unsafe.StringData(file_app_dbentry_proto_rawDesc), len(file_app_dbentry_proto_rawDesc)))
        })
        return file_app_dbentry_proto_rawDescData
}

var file_app_dbentry_proto_msgTypes = make([]protoimpl.MessageInfo, 1)
var file_app_dbentry_proto_goTypes = []any{
        (*DbEntry)(nil),               // 0: app.DbEntry
        (*timestamppb.Timestamp)(nil), // 1: google.protobuf.Timestamp
}
var file_app_dbentry_proto_depIdxs = []int32{
        1, // 0: app.DbEntry.Created:type_name -> google.protobuf.Timestamp
        1, // [1:1] is the sub-list for method output_type
        1, // [1:1] is the sub-list for method input_type
        1, // [1:1] is the sub-list for extension type_name
        1, // [1:1] is the sub-list for extension extendee
        0, // [0:1] is the sub-list for field type_name
}

func init() { file_app_dbentry_proto_init() }
func file_app_dbentry_proto_init() {
        if File_app_dbentry_proto != nil {
                return
        }
        type x struct{}
        out := protoimpl.TypeBuilder{
                File: protoimpl.DescBuilder{
                        GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
                        RawDescriptor: unsafe.Slice(unsafe.StringData(file_app_dbentry_proto_rawDesc), len(file_app_dbentry_proto_rawDesc)),
                        NumEnums:      0,
                        NumMessages:   1,
                        NumExtensions: 0,
                        NumServices:   0,
                },
                GoTypes:           file_app_dbentry_proto_goTypes,
                DependencyIndexes: file_app_dbentry_proto_depIdxs,
                MessageInfos:      file_app_dbentry_proto_msgTypes,
        }.Build()
        File_app_dbentry_proto = out.File
        file_app_dbentry_proto_goTypes = nil
        file_app_dbentry_proto_depIdxs = nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package app

// look if a key in a map exists, generic variant
func Exists[K comparable, V any](m map[K]V, v K) bool {
        if _, ok := m[v]; ok {
                return true
        }

        return false
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package app

import "os"

func cleanError(file string, err error) error {
        // remove given [backup] file and forward the given error
        os.Remove(file)
        return err
}

func fileExists(filename string) bool {
        info, err := os.Stat(filename)

        if err != nil {
                // return false on any error
                return false
        }

        return !info.IsDir()
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cfg

import (
        "fmt"
        "io"
        "os"

        "github.com/pelletier/go-toml"
        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/common"
)

var Version string = "v0.2.2"

type BucketConfig struct {
        Encrypt bool
}

type Config struct {
        Debug           bool
        Dbfile          string
        Dbbucket        string
        Template        string
        Mode            string // wide, table, yaml, json
        NoHeaders       bool
        NoHumanize      bool
        Encrypt         bool // one entry
        CaseInsensitive bool
        Fulltext        bool
        Listen          string
        Buckets         map[string]BucketConfig // config file only

        Tags []string // internal
        DB   *app.DB  // internal
        File string   // internal
}

func (conf *Config) GetConfig(files []string) error {
        for _, file := range files {
                if err := conf.ParseConfigFile(file); err != nil {
                        return err
                }
        }

        return nil
}

func (conf *Config) ParseConfigFile(file string) error {
        if !common.FileExists(file) {
                return nil
        }

        fd, err := os.OpenFile(file, os.O_RDONLY, 0600)
        if err != nil {
                return fmt.Errorf("failed to open config file %s: %w", file, err)
        }

        data, err := io.ReadAll(fd)
        if err != nil {
                return fmt.Errorf("failed to read from config file: %w", err)
        }

        add := Config{}
        err = toml.Unmarshal(data, &add)
        if err != nil {
                return fmt.Errorf("failed to unmarshall toml: %w", err)
        }

        // merge new values into existing config
        switch {
        case add.Debug != conf.Debug:
                conf.Debug = add.Debug
        case add.Dbfile != "":
                conf.Dbfile = add.Dbfile
        case add.Dbbucket != "":
                conf.Dbbucket = add.Dbbucket
        case add.Template != "":
                conf.Template = add.Template
        case add.NoHeaders != conf.NoHeaders:
                conf.NoHeaders = add.NoHeaders
        case add.NoHumanize != conf.NoHumanize:
                conf.NoHumanize = add.NoHumanize
        case add.Encrypt != conf.Encrypt:
                conf.Encrypt = add.Encrypt
        case add.Listen != "":
                conf.Listen = add.Listen
        }

        // only supported in config files
        conf.Buckets = add.Buckets

        // determine bucket encryption mode
        for name, bucket := range conf.Buckets {
                if name == conf.Dbbucket {
                        conf.Encrypt = bucket.Encrypt
                }
        }

        return nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd

import (
        "errors"
        "os"
        "strings"

        "github.com/spf13/cobra"
        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/cfg"
        "github.com/tlinden/anydb/output"
)

func Set(conf *cfg.Config) *cobra.Command {
        var (
                attr app.DbAttr
        )

        var cmd = &cobra.Command{
                Use:   "set <key> [<value> | -r <file>] [-t <tag>]",
                Short: "Insert key/value pair",
                Long:  `Insert key/value pair`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        if len(args) == 0 {
                                return errors.New("no key/value pair specified")
                        }

                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        if len(args) > 0 {
                                attr.Args = args
                        }

                        // turn comma list into slice, if needed
                        if len(attr.Tags) == 1 && strings.Contains(attr.Tags[0], ",") {
                                attr.Tags = strings.Split(attr.Tags[0], ",")
                        }

                        // check if value given as file or via stdin and fill attr accordingly
                        if err := attr.ParseKV(); err != nil {
                                return err
                        }

                        // encrypt?
                        if conf.Encrypt {
                                pass, err := getPassword()
                                if err != nil {
                                        return err
                                }

                                err = app.Encrypt(pass, &attr)
                                if err != nil {
                                        return err
                                }
                        }

                        return conf.DB.Set(&attr)
                },
        }

        cmd.PersistentFlags().BoolVarP(&conf.Encrypt, "encrypt", "e", false, "encrypt value")
        cmd.PersistentFlags().StringVarP(&attr.File, "file", "r", "", "Filename or - for STDIN")
        cmd.PersistentFlags().StringArrayVarP(&attr.Tags, "tags", "t", nil, "tags, multiple allowed")

        cmd.Aliases = append(cmd.Aliases, "add")
        cmd.Aliases = append(cmd.Aliases, "s")
        cmd.Aliases = append(cmd.Aliases, "+")

        return cmd
}

func Get(conf *cfg.Config) *cobra.Command {
        var (
                attr app.DbAttr
        )

        var cmd = &cobra.Command{
                Use:   "get  <key> [-o <file>] [-m <mode>] [-n -N] [-T <tpl>]",
                Short: "Retrieve value for a key",
                Long:  `Retrieve value for a key`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        if len(args) == 0 {
                                return errors.New("no key specified")
                        }

                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        if len(args) > 0 {
                                attr.Key = args[0]
                        }

                        entry, err := conf.DB.Get(&attr)
                        if err != nil {
                                return err
                        }

                        if entry.Encrypted {
                                pass, err := getPassword()
                                if err != nil {
                                        return err
                                }

                                clear, err := app.Decrypt(pass, []byte(entry.Value))
                                if err != nil {
                                        return err
                                }

                                entry.Value = string(clear)
                                entry.Size = uint64(len(entry.Value))
                                entry.Encrypted = false
                        }

                        return output.Print(os.Stdout, conf, &attr, entry)
                },
        }

        cmd.PersistentFlags().StringVarP(&attr.File, "output", "o", "", "output value to file (ignores -m)")
        cmd.PersistentFlags().StringVarP(&conf.Mode, "mode", "m", "", "output format (simple|wide|json|template) (default 'simple')")
        cmd.PersistentFlags().BoolVarP(&conf.NoHeaders, "no-headers", "n", false, "omit headers in tables")
        cmd.PersistentFlags().BoolVarP(&conf.NoHumanize, "no-human", "N", false, "do not translate to human readable values")
        cmd.PersistentFlags().StringVarP(&conf.Template, "template", "T", "", "go template for '-m template'")

        cmd.Aliases = append(cmd.Aliases, "show")
        cmd.Aliases = append(cmd.Aliases, "g")
        cmd.Aliases = append(cmd.Aliases, ".")

        return cmd
}

func Del(conf *cfg.Config) *cobra.Command {
        var (
                attr app.DbAttr
        )

        var cmd = &cobra.Command{
                Use:   "del <key>",
                Short: "Delete key",
                Long:  `Delete key and value matching key`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        if len(args) == 0 {
                                return errors.New("No key specified")
                        }

                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        if len(args) > 0 {
                                attr.Key = args[0]
                        }

                        return conf.DB.Del(&attr)
                },
        }

        cmd.Aliases = append(cmd.Aliases, "d")
        cmd.Aliases = append(cmd.Aliases, "rm")

        return cmd
}

func List(conf *cfg.Config) *cobra.Command {
        var (
                attr app.DbAttr
                wide bool
        )

        var cmd = &cobra.Command{
                Use:   "list  [<filter-regex> | -t <tag> ] [-m <mode>] [-nNis] [-T <tpl>]",
                Short: "List database contents",
                Long:  `List database contents`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        if len(args) > 0 {
                                if conf.CaseInsensitive {
                                        attr.Args = []string{"(?i)" + args[0]}
                                } else {
                                        attr.Args = args
                                }
                        }

                        // turn comma list into slice, if needed
                        if len(attr.Tags) == 1 && strings.Contains(attr.Tags[0], ",") {
                                attr.Tags = strings.Split(attr.Tags[0], ",")
                        }

                        if wide {
                                conf.Mode = "wide"
                        }

                        entries, err := conf.DB.List(&attr, conf.Fulltext)
                        if err != nil {
                                return err
                        }

                        return output.List(os.Stdout, conf, entries)
                },
        }

        cmd.PersistentFlags().StringVarP(&conf.Mode, "mode", "m", "", "output format (table|wide|json|template), wide is a verbose table. (default 'table')")
        cmd.PersistentFlags().StringVarP(&conf.Template, "template", "T", "", "go template for '-m template'")
        cmd.PersistentFlags().BoolVarP(&wide, "wide-output", "l", false, "output mode: wide")
        cmd.PersistentFlags().BoolVarP(&conf.NoHeaders, "no-headers", "n", false, "omit headers in tables")
        cmd.PersistentFlags().BoolVarP(&conf.NoHumanize, "no-human", "N", false, "do not translate to human readable values")
        cmd.PersistentFlags().BoolVarP(&conf.CaseInsensitive, "case-insensitive", "i", false, "filter case insensitive")
        cmd.PersistentFlags().BoolVarP(&conf.Fulltext, "search-fulltext", "s", false, "perform a full text search")
        cmd.PersistentFlags().StringArrayVarP(&attr.Tags, "tags", "t", nil, "tags, multiple allowed")

        cmd.Aliases = append(cmd.Aliases, "ls")
        cmd.Aliases = append(cmd.Aliases, "/")
        cmd.Aliases = append(cmd.Aliases, "find")
        cmd.Aliases = append(cmd.Aliases, "search")

        return cmd
}

func getPassword() ([]byte, error) {
        var pass []byte

        envpass := os.Getenv("ANYDB_PASSWORD")

        if envpass == "" {
                readpass, err := app.AskForPassword()
                if err != nil {
                        return nil, err
                }

                pass = readpass
        } else {
                pass = []byte(envpass)
        }

        return pass, nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd

import (
        "bytes"
        "errors"
        "fmt"
        "io"
        "os"
        "os/exec"

        "github.com/spf13/cobra"
        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/cfg"
        "github.com/tlinden/anydb/output"
        "github.com/tlinden/anydb/rest"
)

func Export(conf *cfg.Config) *cobra.Command {
        var (
                attr app.DbAttr
        )

        var cmd = &cobra.Command{
                Use:   "export -o <json filename>",
                Short: "Export database to json file",
                Long:  `Export database to json file`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        conf.Mode = "json"

                        entries, err := conf.DB.Getall(&attr)
                        if err != nil {
                                return err
                        }

                        return output.WriteJSON(&attr, conf, entries)
                },
        }

        cmd.PersistentFlags().StringVarP(&attr.File, "output-file", "o", "", "filename or - for STDIN")
        if err := cmd.MarkPersistentFlagRequired("output-file"); err != nil {
                panic(err)
        }

        cmd.Aliases = append(cmd.Aliases, "dump")
        cmd.Aliases = append(cmd.Aliases, "backup")

        return cmd
}

func Import(conf *cfg.Config) *cobra.Command {
        var (
                attr app.DbAttr
        )

        var cmd = &cobra.Command{
                Use:   "import -i <json file>",
                Short: "Import database dump",
                Long:  `Import database dump`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        out, err := conf.DB.Import(&attr)
                        if err != nil {
                                return err
                        }

                        fmt.Print(out)
                        return nil
                },
        }

        cmd.PersistentFlags().StringVarP(&attr.File, "import-file", "i", "", "filename or - for STDIN")
        cmd.PersistentFlags().StringArrayVarP(&attr.Tags, "tags", "t", nil, "tags, multiple allowed")
        if err := cmd.MarkPersistentFlagRequired("import-file"); err != nil {
                panic(err)
        }

        cmd.Aliases = append(cmd.Aliases, "restore")

        return cmd
}

func Help(conf *cfg.Config) *cobra.Command {
        return nil
}
func Man(conf *cfg.Config) *cobra.Command {
        var cmd = &cobra.Command{
                Use:   "man",
                Short: "show manual page",
                Long:  `show manual page`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        man := exec.Command("less", "-")

                        var b bytes.Buffer

                        b.WriteString(manpage)

                        man.Stdout = os.Stdout
                        man.Stdin = &b
                        man.Stderr = os.Stderr

                        err := man.Run()

                        if err != nil {
                                return fmt.Errorf("failed to execute 'less': %w", err)
                        }

                        return nil
                },
        }

        return cmd
}

func Serve(conf *cfg.Config) *cobra.Command {
        var cmd = &cobra.Command{
                Use:   "serve [-l host:port]",
                Short: "run REST API listener",
                Long:  `run REST API listener`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        return rest.Runserver(conf, nil)
                },
        }

        cmd.PersistentFlags().StringVarP(&conf.Listen, "listen", "l", "localhost:8787", "host:port")

        return cmd
}

func Info(conf *cfg.Config) *cobra.Command {
        var cmd = &cobra.Command{
                Use:   "info",
                Short: "info",
                Long:  `show info about database`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true

                        info, err := conf.DB.Info()
                        if err != nil {
                                return err
                        }

                        return output.Info(os.Stdout, conf, info)
                },
        }

        cmd.PersistentFlags().BoolVarP(&conf.NoHumanize, "no-human", "N", false, "do not translate to human readable values")

        return cmd
}

func Edit(conf *cfg.Config) *cobra.Command {
        var (
                attr app.DbAttr
        )

        var cmd = &cobra.Command{
                Use:   "edit <key>",
                Short: "Edit a key",
                Long:  `Edit a key`,
                RunE: func(cmd *cobra.Command, args []string) error {
                        if len(args) == 0 {
                                return errors.New("no key specified")
                        }

                        // errors at this stage do not cause the usage to be shown
                        cmd.SilenceUsage = true
                        password := []byte{}

                        if len(args) > 0 {
                                attr.Key = args[0]
                        }

                        // fetch entry
                        entry, err := conf.DB.Get(&attr)
                        if err != nil {
                                return err
                        }

                        if len(entry.Value) == 0 && entry.Binary {
                                return errors.New("key contains binary uneditable content")
                        }

                        // decrypt if needed
                        if entry.Encrypted {
                                pass, err := getPassword()
                                if err != nil {
                                        return err
                                }
                                password = pass

                                clear, err := app.Decrypt(pass, []byte(entry.Value))
                                if err != nil {
                                        return err
                                }

                                entry.Value = string(clear)
                                entry.Encrypted = false
                        }

                        // determine editor, vi is default
                        editor := getEditor()

                        // save file to a temp file, call the editor with it, read
                        // it  back in and  compare the content with  the original
                        // one
                        newcontent, err := editContent(editor, string(entry.Value))
                        if err != nil {
                                return err
                        }

                        // all is valid, fill our DB feeder
                        newattr := app.DbAttr{
                                Key:       attr.Key,
                                Tags:      attr.Tags,
                                Encrypted: attr.Encrypted,
                                Val:       []byte(newcontent),
                        }

                        // encrypt if needed
                        if conf.Encrypt {
                                err = app.Encrypt(password, &attr)
                                if err != nil {
                                        return err
                                }
                        }

                        // done
                        return conf.DB.Set(&newattr)
                },
        }

        cmd.Aliases = append(cmd.Aliases, "modify")
        cmd.Aliases = append(cmd.Aliases, "mod")
        cmd.Aliases = append(cmd.Aliases, "ed")
        cmd.Aliases = append(cmd.Aliases, "vi")

        return cmd
}

func getEditor() string {
        editor := "vi"

        enveditor, present := os.LookupEnv("EDITOR")
        if present {
                if editor != "" {
                        editor = enveditor
                }
        }

        return editor
}

// taken from github.com/tlinden/rpn/ (my own program)
func editContent(editor string, content string) (string, error) {
        // create a temp file
        tmp, err := os.CreateTemp("", "stack")
        if err != nil {
                return "", fmt.Errorf("failed to create templ file: %w", err)
        }
        defer os.Remove(tmp.Name())

        // put the content into a tmp file
        _, err = tmp.WriteString(content)
        if err != nil {
                return "", fmt.Errorf("failed to write value to temp file: %w", err)
        }

        // execute editor with our tmp file containing current stack
        cmd := exec.Command(editor, tmp.Name())

        cmd.Stdin = os.Stdin
        cmd.Stdout = os.Stdout
        cmd.Stderr = os.Stderr

        err = cmd.Run()
        if err != nil {
                return "", fmt.Errorf("failed to run editor command %s: %w", editor, err)
        }

        // read the file back in
        modified, err := os.Open(tmp.Name())
        if err != nil {
                return "", fmt.Errorf("failed to open temp file: %w", err)
        }
        defer modified.Close()

        newcontent, err := io.ReadAll(modified)
        if err != nil {
                return "", fmt.Errorf("failed to read from temp file: %w", err)
        }

        newcontentstr := string(newcontent)
        if content == newcontentstr {
                return "", fmt.Errorf("content not modified, aborting")
        }

        return newcontentstr, nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package cmd

import (
        "errors"
        "fmt"
        "log/slog"
        "os"
        "path/filepath"
        "runtime/debug"

        "github.com/spf13/cobra"
        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/cfg"
        "github.com/tlinden/yadu"
)

func completion(cmd *cobra.Command, mode string) error {
        switch mode {
        case "bash":
                return cmd.Root().GenBashCompletion(os.Stdout)
        case "zsh":
                return cmd.Root().GenZshCompletion(os.Stdout)
        case "fish":
                return cmd.Root().GenFishCompletion(os.Stdout, true)
        case "powershell":
                return cmd.Root().GenPowerShellCompletionWithDesc(os.Stdout)
        default:
                return errors.New("invalid shell parameter! Valid ones: bash|zsh|fish|powershell")
        }
}

func Execute() {
        var (
                conf           cfg.Config
                configfile     string
                ShowVersion    bool
                ShowCompletion string
        )

        home, err := os.UserHomeDir()
        if err != nil {
                panic(err)
        }

        SearchConfigs := []string{
                filepath.Join(home, ".config", "anydb", "anydb.toml"),
                filepath.Join(home, ".anydb.toml"),
                "anydb.toml",
        }

        var rootCmd = &cobra.Command{
                Use:   "anydb <command> [options]",
                Short: "anydb",
                Long:  `A personal key value store`,
                PersistentPreRunE: func(cmd *cobra.Command, args []string) error {

                        var configs []string
                        if configfile != "" {
                                configs = []string{configfile}
                        } else {
                                configs = SearchConfigs
                        }

                        if err := conf.GetConfig(configs); err != nil {
                                return err
                        }

                        if conf.Debug {
                                buildInfo, _ := debug.ReadBuildInfo()
                                opts := &yadu.Options{
                                        Level:     slog.LevelDebug,
                                        AddSource: true,
                                }

                                slog.SetLogLoggerLevel(slog.LevelDebug)

                                handler := yadu.NewHandler(os.Stdout, opts)
                                debuglogger := slog.New(handler).With(
                                        slog.Group("program_info",
                                                slog.Int("pid", os.Getpid()),
                                                slog.String("go_version", buildInfo.GoVersion),
                                        ),
                                )
                                slog.SetDefault(debuglogger)

                                slog.Debug("parsed config", "conf", conf)
                        }

                        dbfile := app.GetDbFile(conf.Dbfile)

                        db, err := app.New(dbfile, conf.Dbbucket, conf.Debug)
                        if err != nil {
                                return err
                        }

                        conf.DB = db
                        return nil
                },

                RunE: func(cmd *cobra.Command, args []string) error {
                        if ShowVersion {
                                fmt.Printf("This is anydb version %s\n", cfg.Version)
                                return nil
                        }

                        if len(ShowCompletion) > 0 {
                                return completion(cmd, ShowCompletion)
                        }

                        if len(args) == 0 {
                                return errors.New("no command specified")
                        }

                        return nil
                },
        }

        // options
        rootCmd.PersistentFlags().BoolVarP(&ShowVersion, "version", "v", false, "Print program version")
        rootCmd.PersistentFlags().BoolVarP(&conf.Debug, "debug", "d", false, "Enable debugging")
        rootCmd.PersistentFlags().StringVarP(&conf.Dbfile, "dbfile", "f",
                "", "DB file to use (default: ~/.config/anydb/default.db)")
        rootCmd.PersistentFlags().StringVarP(&conf.Dbbucket, "bucket", "b",
                app.BucketData, "use other bucket (default: "+app.BucketData+")")
        rootCmd.PersistentFlags().StringVarP(&configfile, "config", "c", "", "toml config file")

        // CRUD
        rootCmd.AddCommand(Set(&conf))
        rootCmd.AddCommand(List(&conf))
        rootCmd.AddCommand(Get(&conf))
        rootCmd.AddCommand(Del(&conf))

        // backup
        rootCmd.AddCommand(Export(&conf))
        rootCmd.AddCommand(Import(&conf))

        // REST API
        rootCmd.AddCommand(Serve(&conf))

        // auxiliary
        rootCmd.AddCommand(Man(&conf))
        rootCmd.AddCommand(Info(&conf))
        rootCmd.AddCommand(Edit(&conf))

        err = rootCmd.Execute()
        if err != nil {
                os.Exit(1)
        }
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package common

import "os"

func CleanError(file string, err error) error {
        // remove given [backup] file and forward the given error
        os.Remove(file)
        return err
}

func FileExists(filename string) bool {
        info, err := os.Stat(filename)

        if err != nil {
                // return false on any error
                return false
        }

        return !info.IsDir()
}

package common

import (
        "fmt"
        "log/slog"
)

type Slogger struct {
        *slog.Logger
}

func (l Slogger) Debug(v ...interface{})                   {}
func (l Slogger) Debugf(format string, v ...interface{})   { l.Logger.Debug(fmt.Sprintf(format, v...)) }
func (l Slogger) Error(v ...interface{})                   {}
func (l Slogger) Errorf(format string, v ...interface{})   { l.Logger.Error(fmt.Sprintf(format, v...)) }
func (l Slogger) Info(v ...interface{})                    {}
func (l Slogger) Infof(format string, v ...interface{})    { l.Logger.Info(fmt.Sprintf(format, v...)) }
func (l Slogger) Warning(v ...interface{})                 {}
func (l Slogger) Warningf(format string, v ...interface{}) { l.Logger.Warn(fmt.Sprintf(format, v...)) }
func (l Slogger) Fatal(v ...interface{})                   {}
func (l Slogger) Fatalf(format string, v ...interface{})   { l.Logger.Error(fmt.Sprintf(format, v...)) }
func (l Slogger) Panic(v ...interface{})                   {}
func (l Slogger) Panicf(format string, v ...interface{})   { l.Logger.Error(fmt.Sprintf(format, v...)) }

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package main

import (
        "bufio"
        "fmt"
        "log/slog"
        "os"
        "runtime"

        "github.com/inconshreveable/mousetrap"
        "github.com/tlinden/anydb/cmd"
)

func main() {
        const NoLogsLevel = 100
        slog.SetLogLoggerLevel(NoLogsLevel)

        Main()
}

func init() {
        // if we're running on Windows  AND if the user double clicked the
        // exe  file from explorer, we  tell them and then  wait until any
        // key has been hit, which  will make the cmd window disappear and
        // thus give the user time to read it.
        if runtime.GOOS == "windows" {
                if mousetrap.StartedByExplorer() {
                        fmt.Println("Do no double click kleingebaeck.exe!")
                        fmt.Println("Please open a command shell and run it from there.")
                        fmt.Println()
                        fmt.Print("Press any key to quit: ")
                        _, err := bufio.NewReader(os.Stdin).ReadString('\n')
                        if err != nil {
                                panic(err)
                        }
                }
        }
}

func Main() int {
        cmd.Execute()
        return 0
}

func init() {
        // if we're running on Windows  AND if the user double clicked the
        // exe  file from explorer, we  tell them and then  wait until any
        // key has been hit, which  will make the cmd window disappear and
        // thus give the user time to read it.
        if runtime.GOOS == "windows" {
                if mousetrap.StartedByExplorer() {
                        fmt.Println("Please do no double click anydb.exe!")
                        fmt.Println("Please open a command shell and run it from there.")
                        fmt.Println()
                        fmt.Print("Press any key to quit: ")
                        _, err := bufio.NewReader(os.Stdin).ReadString('\n')
                        if err != nil {
                                panic(err)
                        }
                }
        }
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package output

import (
        "encoding/json"
        "fmt"
        "os"

        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/cfg"
)

func WriteJSON(attr *app.DbAttr, conf *cfg.Config, entries app.DbEntries) error {
        jsonentries, err := json.Marshal(entries)
        if err != nil {
                return fmt.Errorf("failed to marshall json: %w", err)
        }

        if attr.File == "-" {
                fmt.Println(string(jsonentries))
        } else {
                fd, err := os.OpenFile(attr.File, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
                if err != nil {
                        return fmt.Errorf("failed to open file %s for writing: %w", attr.File, err)
                }

                if _, err := fd.Write(jsonentries); err != nil {
                        return fmt.Errorf("failed writing to file %s: %w", attr.File, err)
                }

                fmt.Printf("database contents exported to %s\n", attr.File)
        }

        return nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package output

import (
        "bytes"
        "encoding/json"
        "errors"
        "fmt"
        "io"
        "strconv"
        "strings"
        tpl "text/template"

        "github.com/dustin/go-humanize"
        "github.com/olekukonko/tablewriter"
        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/cfg"
)

func List(writer io.Writer, conf *cfg.Config, entries app.DbEntries) error {
        switch conf.Mode {
        case "wide", "", "table":
                return ListTable(writer, conf, entries)
        case "json":
                return ListJson(writer, conf, entries)
        case "template":
                return ListTemplate(writer, conf, entries)
        default:
                return errors.New("unsupported mode")
        }
}

func ListJson(writer io.Writer, conf *cfg.Config, entries app.DbEntries) error {
        jsonentries, err := json.Marshal(entries)
        if err != nil {
                return fmt.Errorf("failed marshall json: %s", err)
        }

        fmt.Println(string(jsonentries))
        return nil
}

func ListTemplate(writer io.Writer, conf *cfg.Config, entries app.DbEntries) error {
        tmpl, err := tpl.New("list").Parse(conf.Template)
        if err != nil {
                return fmt.Errorf("failed to parse output template: %w", err)
        }

        buf := bytes.Buffer{}

        for _, row := range entries {
                buf.Reset()
                err = tmpl.Execute(&buf, row)
                if err != nil {
                        return fmt.Errorf("failed to execute output template: %w", err)
                }

                if buf.Len() > 0 {
                        fmt.Fprintln(writer, buf.String())
                }
        }

        return nil
}

func ListTable(writer io.Writer, conf *cfg.Config, entries app.DbEntries) error {
        tableString := &strings.Builder{}
        table := tablewriter.NewWriter(tableString)

        if !conf.NoHeaders {
                if conf.Mode == "wide" {
                        table.SetHeader([]string{"KEY", "TAGS", "SIZE", "UPDATED", "VALUE"})
                } else {
                        table.SetHeader([]string{"KEY", "VALUE"})
                }
        }

        for _, row := range entries {
                if conf.Mode == "wide" {
                        switch conf.NoHumanize {
                        case true:
                                table.Append([]string{
                                        row.Key,
                                        strings.Join(row.Tags, ","),
                                        strconv.FormatUint(row.Size, 10),
                                        row.Created.AsTime().Format("02.01.2006T03:04.05"),
                                        row.Preview,
                                })
                        default:
                                table.Append([]string{
                                        row.Key,
                                        strings.Join(row.Tags, ","),
                                        humanize.Bytes(uint64(row.Size)),
                                        humanize.Time(row.Created.AsTime()),
                                        row.Preview,
                                })
                        }

                } else {
                        table.Append([]string{row.Key, row.Preview})
                }
        }

        table.SetHeaderAlignment(tablewriter.ALIGN_LEFT)
        table.SetAutoWrapText(false)
        table.SetAutoFormatHeaders(true)
        table.SetAlignment(tablewriter.ALIGN_LEFT)
        table.SetCenterSeparator("")
        table.SetColumnSeparator("")
        table.SetRowSeparator("")
        table.SetHeaderLine(false)
        table.SetBorder(false)
        table.SetNoWhiteSpace(true)

        table.SetTablePadding("\t") // pad with tabs

        table.Render()

        fmt.Fprint(writer, tableString.String())

        return nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package output

import (
        "encoding/json"
        "fmt"
        "io"
        "os"
        "reflect"

        "github.com/dustin/go-humanize"
        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/cfg"
        "golang.org/x/term"
        //"github.com/alecthomas/repr"
)

func Print(writer io.Writer, conf *cfg.Config, attr *app.DbAttr, entry *app.DbEntry) error {
        if attr.File != "" {
                return WriteFile(writer, conf, attr, entry)
        }

        isatty := term.IsTerminal(int(os.Stdout.Fd()))

        switch conf.Mode {
        case "simple", "":
                if entry.Binary {
                        if isatty {
                                fmt.Println("binary data omitted")
                        } else {
                                os.Stdout.WriteString(entry.Value)
                        }
                } else {
                        fmt.Print(string(entry.Value))
                        if entry.Value[entry.Size-1] != '\n' {
                                // always add a terminal newline
                                fmt.Println()
                        }
                }
        case "json":
                jsonentry, err := json.Marshal(entry)
                if err != nil {
                        return fmt.Errorf("failed to marshall json: %s", err)
                }

                fmt.Println(string(jsonentry))
        case "wide":
                return ListTable(writer, conf, app.DbEntries{entry})
        case "template":
                return ListTemplate(writer, conf, app.DbEntries{entry})
        }

        return nil
}

func WriteFile(writer io.Writer, conf *cfg.Config, attr *app.DbAttr, entry *app.DbEntry) error {
        var fileHandle *os.File
        var err error

        if attr.File == "-" {
                fileHandle = os.Stdout
        } else {
                fd, err := os.OpenFile(attr.File, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0755)
                if err != nil {
                        return fmt.Errorf("failed to open file %s for writing: %w", attr.File, err)
                }
                defer fd.Close()

                fileHandle = fd
        }

        // actually write file content
        _, err = fileHandle.WriteString(entry.Value)

        if !entry.Binary {
                if entry.Value[entry.Size-1] != '\n' {
                        // always add a terminal newline
                        _, err = fileHandle.Write([]byte{'\n'})
                }
        }

        if err != nil {
                return fmt.Errorf("failed to write to file %s: %w", attr.File, err)
        }

        return nil
}

func Info(writer io.Writer, conf *cfg.Config, info *app.DbInfo) error {
        fmt.Fprintf(writer, "Database: %s\n", info.Path)

        for _, bucket := range info.Buckets {
                if conf.NoHumanize {
                        fmt.Fprintf(
                                writer,
                                "%19s: %s\n%19s: %d\n%19s: %d\n%19s: %t\n",
                                "Bucket", bucket.Name,
                                "Size", bucket.Size,
                                "Keys", bucket.Keys,
                                "Encrypted", conf.Encrypt)
                } else {
                        fmt.Fprintf(
                                writer,
                                "%19s: %s\n%19s: %s\n%19s: %d\n",
                                "Bucket", bucket.Name,
                                "Size", humanize.Bytes(uint64(bucket.Size)),
                                "Keys", bucket.Keys)
                }

                if conf.Debug {
                        val := reflect.ValueOf(&bucket.Stats).Elem()
                        for i := 0; i < val.NumField(); i++ {
                                fmt.Fprintf(writer, "%19s: %v\n", val.Type().Field(i).Name, val.Field(i))
                        }
                }

                fmt.Fprintln(writer)
        }
        return nil
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package rest

import (
        //"github.com/alecthomas/repr"

        "github.com/gofiber/fiber/v2"
        "github.com/tlinden/anydb/app"
        "github.com/tlinden/anydb/cfg"
)

type SetContext struct {
        Query string `json:"query" form:"query"`
}

type ListResponse struct {
        Success bool
        Code    int
        Entries app.DbEntries
}

type SingleResponse struct {
        Success bool
        Code    int
        Entry   *app.DbEntry
}

func RestList(c *fiber.Ctx, conf *cfg.Config) error {
        attr := new(app.DbAttr)

        if len(c.Body()) > 0 {
                if err := c.BodyParser(attr); err != nil {
                        return c.Status(fiber.StatusUnprocessableEntity).JSON(fiber.Map{
                                "errors": err.Error(),
                        })

                }
        }

        // get list
        entries, err := conf.DB.List(attr, attr.Fulltext)
        if err != nil {
                return JsonStatus(c, fiber.StatusForbidden,
                        "Unable to list keys: "+err.Error())
        }

        return c.Status(fiber.StatusOK).JSON(
                ListResponse{
                        Success: true,
                        Code:    fiber.StatusOK,
                        Entries: entries,
                },
        )
}

func RestGet(c *fiber.Ctx, conf *cfg.Config) error {
        if c.Params("key") == "" {
                return JsonStatus(c, fiber.StatusForbidden,
                        "key not provided")
        }

        // get list
        entry, err := conf.DB.Get(&app.DbAttr{Key: c.Params("key")})
        if err != nil {
                return JsonStatus(c, fiber.StatusForbidden,
                        "Unable to get key: "+err.Error())
        }
        if entry.Key == "" {
                return JsonStatus(c, fiber.StatusForbidden,
                        "Key does not exist")
        }

        return c.Status(fiber.StatusOK).JSON(
                SingleResponse{
                        Success: true,
                        Code:    fiber.StatusOK,
                        Entry:   entry,
                },
        )
}

func RestDelete(c *fiber.Ctx, conf *cfg.Config) error {
        if c.Params("key") == "" {
                return JsonStatus(c, fiber.StatusForbidden,
                        "key not provided")
        }

        // get list
        err := conf.DB.Del(&app.DbAttr{Key: c.Params("key")})
        if err != nil {
                return JsonStatus(c, fiber.StatusForbidden,
                        "Unable to delete key: "+err.Error())
        }

        return c.Status(fiber.StatusOK).JSON(
                Result{
                        Success: true,
                        Code:    fiber.StatusOK,
                        Message: "key deleted",
                },
        )
}

func RestSet(c *fiber.Ctx, conf *cfg.Config) error {
        attr := new(app.DbAttr)
        if err := c.BodyParser(attr); err != nil {
                return c.Status(fiber.StatusUnprocessableEntity).JSON(fiber.Map{
                        "errors": err.Error(),
                })

        }

        err := conf.DB.Set(attr)
        if err != nil {
                return JsonStatus(c, fiber.StatusForbidden,
                        "Unable to set key: "+err.Error())
        }

        return c.Status(fiber.StatusOK).JSON(
                Result{
                        Success: true,
                        Code:    fiber.StatusOK,
                },
        )
}

/*
Copyright © 2024 Thomas von Dein

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package rest

import (
        "github.com/gofiber/fiber/v2"
        "github.com/gofiber/fiber/v2/middleware/compress"
        "github.com/gofiber/fiber/v2/middleware/cors"
        "github.com/gofiber/fiber/v2/middleware/logger"
        "github.com/tlinden/anydb/cfg"
)

// used to return to the api client
type Result struct {
        Success bool   `json:"success"`
        Message string `json:"message"`
        Code    int    `json:"code"`
}

func Runserver(conf *cfg.Config, args []string) error {
        // setup api server
        router := SetupServer(conf)

        // public rest api routes
        api := router.Group("/anydb/v1")
        {
                api.Get("/", func(c *fiber.Ctx) error {
                        return RestList(c, conf)
                })

                api.Post("/", func(c *fiber.Ctx) error {
                        // same thing as above but allows to supply parameters, see app.Dbattr{}
                        return RestList(c, conf)
                })

                api.Get("/:key", func(c *fiber.Ctx) error {
                        return RestGet(c, conf)
                })

                api.Delete("/:key", func(c *fiber.Ctx) error {
                        return RestDelete(c, conf)
                })

                api.Put("/", func(c *fiber.Ctx) error {
                        return RestSet(c, conf)
                })
        }

        // public routes
        {
                router.Get("/", func(c *fiber.Ctx) error {
                        return c.Send([]byte("Use the REST API"))
                })
        }

        return router.Listen(conf.Listen)
}

func SetupServer(conf *cfg.Config) *fiber.App {
        // disable colors
        fiber.DefaultColors = fiber.Colors{}

        router := fiber.New(fiber.Config{
                CaseSensitive: true,
                StrictRouting: true,
                Immutable:     true,
                ServerHeader:  "anydb serve",
                AppName:       "anydb",
        })

        router.Use(logger.New(logger.Config{
                Format:        "${pid} ${ip}:${port} ${status} - ${method} ${path}\n",
                DisableColors: true,
        }))

        router.Use(cors.New(cors.Config{
                AllowMethods:  "GET,PUT,POST,DELETE",
                ExposeHeaders: "Content-Type,Accept",
        }))

        router.Use(compress.New(compress.Config{
                Level: compress.LevelBestSpeed,
        }))

        return router
}

/*
Wrapper to respond with proper json status, message and code,
shall be prepared and called by the handlers directly.
*/
func JsonStatus(c *fiber.Ctx, code int, msg string) error {
        success := true

        if code != fiber.StatusOK {
                success = false
        }

        return c.Status(code).JSON(Result{
                Code:    code,
                Message: msg,
                Success: success,
        })
}