// Copyright 2021 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package rowcodec

import (
	"testing"

	"github.com/pingcap/tidb/sessionctx/stmtctx"
	"github.com/pingcap/tidb/testkit/testsetup"
	"github.com/pingcap/tidb/types"
	"github.com/pingcap/tidb/util/codec"
	"go.uber.org/goleak"
)

func TestMain(m *testing.M) {
	testsetup.SetupForCommonTest()
	opts := []goleak.Option{
		goleak.IgnoreTopFunction("github.com/golang/glog.(*loggingT).flushDaemon"),
		goleak.IgnoreTopFunction("github.com/lestrrat-go/httprc.runFetchWorker"),
		goleak.IgnoreTopFunction("go.etcd.io/etcd/client/pkg/v3/logutil.(*MergeLogger).outputLoop"),
	}
	goleak.VerifyTestMain(m, opts...)
}

// EncodeFromOldRow encodes a row from an old-format row.
// this method will be used in test.
func EncodeFromOldRow(encoder *Encoder, sc *stmtctx.StatementContext, oldRow, buf []byte) ([]byte, error) {
	if len(oldRow) > 0 && oldRow[0] == CodecVer {
		return oldRow, nil
	}
	encoder.reset()
	for len(oldRow) > 1 {
		var d types.Datum
		var err error
		oldRow, d, err = codec.DecodeOne(oldRow)
		if err != nil {
			return nil, err
		}
		colID := d.GetInt64()
		oldRow, d, err = codec.DecodeOne(oldRow)
		if err != nil {
			return nil, err
		}
		encoder.appendColVal(colID, &d)
	}
	numCols, notNullIdx := encoder.reformatCols()
	err := encoder.encodeRowCols(sc, numCols, notNullIdx)
	if err != nil {
		return nil, err
	}
	return encoder.row.toBytes(buf[:0]), nil
}