package leveldb

import (
	"context"
	"fmt"
	"github.com/syndtr/goleveldb/leveldb"
	"github.com/syndtr/goleveldb/leveldb/filter"
	"github.com/syndtr/goleveldb/leveldb/opt"
	"wallet-system/internal/pkg/logging/applogger"
)

type LevelDB struct {
	DB *leveldb.DB
}

// NewLevelDB
//
//	@Description:
//	@param name
//	@return *LevelDB
//	@return error
func NewLevelDB(name string) (*LevelDB, error) {
	ldb := new(LevelDB)
	o := &opt.Options{
		Filter: filter.NewBloomFilter(10),
	}

	db, err := leveldb.OpenFile(fmt.Sprintf("../wallet/%v", name), o)
	if err != nil {
		applogger.Error("openFile err:", err)
		return nil, err
	}

	ldb.DB = db

	return ldb, nil
}

// WriteDB
//
//	@Description:
//	@receiver d
//	@param ctx
//	@param key
//	@param value
//	@return error
func (d *LevelDB) WriteDB(ctx context.Context, key string, value []byte) error {
	batch := new(leveldb.Batch)
	batch.Put([]byte(key), value)
	if err := d.DB.Write(batch, nil); err != nil {
		applogger.Error("write err:", err)
		return err
	}

	return nil
}

// ReadWalletAddrList
//
//	@Description:
//	@receiver d
//	@param ctx
//	@return []string
//	@return error
func (d *LevelDB) ReadWalletAddrList(ctx context.Context) ([]string, error) {
	var addressList []string
	iter := d.DB.NewIterator(nil, nil)
	for iter.Next() {
		key := iter.Key()
		addressList = append(addressList, string(key))
	}
	iter.Release()
	if err := iter.Error(); err != nil {
		applogger.Error("iter.Error:", err)
		return addressList, err
	}

	return addressList, nil
}

// ReadWalletAddressPrivateKeyList
//
//	@Description:
//	@receiver d
//	@param ctx
//	@return map[string][]byte
//	@return error
func (d *LevelDB) ReadWalletAddressPrivateKeyList(ctx context.Context) (map[string][]byte, error) {
	addrMap := make(map[string][]byte)
	iter := d.DB.NewIterator(nil, nil)
	for iter.Next() {
		key := iter.Key()
		value := iter.Value()
		addrMap[string(key)] = value
	}
	iter.Release()
	if err := iter.Error(); err != nil {
		applogger.Error("iter.Error:%v", err)
		return addrMap, err
	}

	return addrMap, nil
}

// ReadPrivateKeyByAddress
//
//	@Description:
//	@receiver d
//	@param ctx
//	@param address
//	@return []byte
//	@return error
func (d *LevelDB) ReadPrivateKeyByAddress(ctx context.Context, address string) ([]byte, error) {
	data, err := d.DB.Get([]byte(address), nil)
	if err != nil {
		applogger.Error("ReadPrivateKeyByAddress.Get:%v", err)
		return []byte{}, err
	}

	return data, nil
}

// DeleteByKey
//
//	@Description:
//	@receiver d
//	@param ctx
//	@param key
//	@return error
func (d *LevelDB) DeleteByKey(ctx context.Context, key string) error {
	if err := d.DB.Delete([]byte(key), nil); err != nil {
		applogger.Error("delete deleteByKey err:%v", err)
		return err
	}

	return nil
}

// DeleteAllByKey
//
//	@Description:
//	@receiver d
//	@param ctx
//	@return error
func (d *LevelDB) DeleteAllByKey(ctx context.Context) error {
	iter := d.DB.NewIterator(nil, nil)
	for iter.Next() {
		key := iter.Key()
		if err := d.DB.Delete(key, nil); err != nil {
			return err
		}
	}
	iter.Release()
	if err := iter.Error(); err != nil {
		applogger.Error("iter.Error:%v", err)
		return err
	}

	return nil
}