package main

import (
	"fmt"
	"os"
	"time"

	. "git.wecise.com/wecise/odbserver/odb"
	"git.wecise.com/wecise/odbserver/odb/cass"
	"git.wecise.com/wecise/odbserver/odb/cass/gocql"
	"git.wecise.com/wecise/odbserver/odb/gerrs"
	"gitee.com/wecisecode/util/logger"
)

func main() {

	field := os.Args[1]
	date := os.Args[2]

	keyspace := "matrix"
	if len(os.Args) > 3 {
		keyspace = os.Args[3]
	}

	logger.SetConsole(true)
	//option := &StoreOption{Cache:CacheAll}

	session, err := cass.NewCassSession(cass.Option{Keyspace: keyspace, DisableInitialHostLookup: true})

	if err != nil {
		logger.Error(err.Error())
	} else {
		defer session.Close()
	}

	for i := 0; i < 1000; i++ {

		//fmt.Print(field, date, keyspace)
		if has_data, err := delete_bucket(session, field, date, keyspace); err != nil {
			fmt.Printf("err ==> %v \n", err)
			return
		} else if !has_data {
			fmt.Printf("run %d delete ok, finish .\n", i)
			return
		}

		time.Sleep(10 * time.Second)
		fmt.Printf("run %d delete ok .\n", i+1)
	}

	fmt.Println("run 1000 delete ok, finish .")

}

func sessionQuery(session *gocql.Session, cql string, values ...interface{}) ([]map[string]interface{}, error) {

	cqlQuery := session.Query(cql, values...)
	if cqlQuery == nil {
		return nil, gerrs.ErrExec.New(" can't connect to cassandra ")
	}

	iter := cqlQuery.Iter()
	defer iter.Close()

	if data, err := iter.SliceMap(); err != nil {
		return nil, err
	} else {
		return data, nil
	}
}

func delete_bucket(session *gocql.Session, field, date, keyspace string) (has_data bool, err error) {

	has_data = false

	var pp int
	if pp, err = DateToPartition(date); err != nil {
		return has_data, gerrs.ExecErr("gdelete_bucket_index", fmt.Sprintf("date format error :%v .", err))
	}

	var rows []map[string]interface{}

	cql := `select tid from promdb where field=? limit 1 ALLOW FILTERING`
	rows, err = sessionQuery(session, cql, field)

	if err == nil && len(rows) > 0 {
		tid := rows[0]["tid"].(int64)

		sql := fmt.Sprintf(`select distinct id, partition from %s.promdb_%d limit 50000`, keyspace+"_tsdb", uint64(tid))

		iter := session.Query(sql).PageSize(TSDB_PAGE_SIZE).Iter()
		defer iter.Close()

		var id int64
		var partition int

		del_set := map[int64][]int{}
		cql := fmt.Sprintf(`delete from  %s.promdb_%d where id=? and partition in ?`, keyspace+"_tsdb", uint64(tid))

		for iter.Scan(&id, &partition) {

			if partition <= pp {
				if ss, ok := del_set[id]; ok {
					del_set[id] = append(ss, partition)
				} else {
					del_set[id] = []int{partition}
				}
			}
		}
		//logger.Warn(cql, del_set)
		for id, partitions := range del_set {
			if err := session.Exec(cql, id, partitions); err != nil {
				return has_data, gerrs.ExecErr("gdelete_bucket_index", fmt.Sprintf("delete id:%v, partitions: %v error :%v .", id, partitions, err))
			}
		}

		if len(del_set) > 0 {
			has_data = true
		}
	}

	return has_data, nil
}