// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package ethdb

import (
	"context"
	"testing"

	"github.com/ledgerwatch/erigon/common/debug"
)

func NewMemDatabase() *ObjectDatabase {
	return NewObjectDatabase(NewMemKV())
}

func NewTestDB(t testing.TB) *ObjectDatabase {
	return NewObjectDatabase(NewTestKV(t))
}

func NewMemKV() RwKV {
	switch debug.TestDB() {
	case "lmdb":
		return NewLMDB().InMem().MustOpen()
	case "mdbx": //nolint:goconst
		return NewMDBX().InMem().MustOpen()
	default:
		// mdbx is too slow for our tests currently, so we keep
		// lmdb as our in-mem db
		// with mdbx tests time out, especially ./tests package
		return NewMDBX().InMem().MustOpen()
	}
}

func NewTestKV(t testing.TB) RwKV {
	kv := NewMemKV()
	t.Cleanup(kv.Close)
	return kv
}

func NewTestTx(t testing.TB) (RwKV, RwTx) {
	kv := NewMemKV()
	t.Cleanup(kv.Close)
	tx, err := kv.BeginRw(context.Background())
	if err != nil {
		t.Fatal(err)
	}
	t.Cleanup(tx.Rollback)
	return kv, tx
}