package settingsdb

import (
	"encoding/json"

	"gitea.codeblob.work/pk/gut/generics"

	"github.com/syndtr/goleveldb/leveldb"
)

type SettingsDB struct {
	db *leveldb.DB
}

func NewOrLoadSettingsDB(path string) (*SettingsDB, error) {
	db, err := leveldb.OpenFile(path, nil)
	if err != nil {
		return nil, err
	}

	return &SettingsDB{
		db: db,
	}, nil
}

func (s *SettingsDB) Set(key string, value any) error {
	var data []byte

	switch v := value.(type) {
	case string:
		data = []byte(v)
	default:
		var err error
		data, err = json.Marshal(v)
		if err != nil {
			return err
		}
	}

	return s.db.Put([]byte(key), data, nil)
}

func (s *SettingsDB) GetString(key string) string {
	data, err := s.db.Get([]byte(key), nil)
	if err != nil {
		return ""
	}

	return string(data)
}

func (s *SettingsDB) GetStrings(key string) []string {
	data, err := s.db.Get([]byte(key), nil)
	if err != nil {
		return nil
	}

	value, err := generics.UnmarshalTo[[]string](data)
	if err != nil {
		return nil
	}

	return *value
}

func (s *SettingsDB) Close() {
	s.db.Close()
}