package archive

import (
	"bytes"
	"context"
	"crypto/md5"
	"encoding/binary"
	"encoding/json"
	"fmt"
	"time"

	"github.com/tsuna/gohbase/hrpc"
	"go-common/app/admin/main/videoup/model/archive"
	"go-common/library/log"
)

var (
	tableInfo = "ugc:ArchiveTaskWeight"
	family    = "weightlog"
	familyB   = []byte(family)
)

// hashRowKey create rowkey(md5(tid)[:2]+tid) for track by tid.
func hashRowKey(tid int64) string {
	var bs = make([]byte, 8)
	binary.LittleEndian.PutUint64(bs, uint64(tid))
	rk := md5.Sum(bs)
	return fmt.Sprintf("%x%d", rk[:2], tid)
}

// WeightLog get weight log.
func (d *Dao) WeightLog(c context.Context, taskid int64) (ls []*archive.TaskWeightLog, err error) {
	var (
		result      *hrpc.Result
		key         = hashRowKey(taskid)
		ctx, cancel = context.WithTimeout(c, time.Duration(d.c.HBase.ReadTimeout))
	)
	defer cancel()

	if result, err = d.hbase.Get(ctx, []byte(tableInfo), []byte(key)); err != nil {
		log.Error("d.hbase.Get error(%v)", err)
		return
	}
	for _, c := range result.Cells {
		if c == nil || !bytes.Equal(c.Family, familyB) {
			return
		}
		aLog := &archive.TaskWeightLog{}
		if err = json.Unmarshal(c.Value, aLog); err != nil {
			log.Warn("json.Unmarshal(%s) error(%v)", string(c.Value), err)
			err = nil
			continue
		}
		ls = append(ls, aLog)
	}
	return
}