package intimate

import (
	"database/sql"
	"log"
	"time"

	_ "github.com/go-sql-driver/mysql"
)

// OperatorFlag 标志
type OperatorFlag int32

const (
	// OperatorOK 等待被处理
	OperatorOK OperatorFlag = 100
	// OperatorExtractorOK 提取数据完成
	OperatorExtractorOK OperatorFlag = 200
	// OperatorWait 等待被处理
	OperatorWait OperatorFlag = 1000
	// OperatorError 错误标志
	OperatorError OperatorFlag = 10000
)

type ISet interface {
	Set(string, interface{})
}

type IGet interface {
	Get(string) interface{}
}

type IGetSet interface {
	ISet
	IGet
}

// SourceStore 储存
type StoreSource struct {
	table string
	db    *sql.DB

	popCount   int
	errorCount int
	errorLimit int
}

func (store *StoreSource) PopCount() int {
	return store.popCount
}

func (store *StoreSource) Close() error {
	return store.db.Close()
}

// NewSourceStore 创建一个存储实例
func NewStoreSource(table string) *StoreSource {
	db, err := sql.Open("mysql", InitConfig.Database.SourceURI)
	if err != nil {
		panic(err)
	}
	return &StoreSource{table: table, db: db}
}

func (store *StoreSource) errorAlarm(err error) {
	if err != nil {
		log.Println("store error: ", err)
		// 报警. 如果数据插入有问题
		store.errorCount++
		if store.errorCount >= store.errorLimit {
			// 数据库频繁操作初问题 报警, 减少没意义的请求
		}
	} else {
		if store.errorCount > 0 {
			store.errorCount--
		}
	}
}

// Insert 插入数据
func (store *StoreSource) Insert(isource IGet) {
	_, err := store.db.Exec("insert into "+store.table+"(url, target_type, source,  ext, operator, error_msg, streamer_id) values(?,?,?,?,?,?,?)", isource.Get("Url"), isource.Get("Target"), isource.Get("Source"), isource.Get("Ext"), isource.Get("Operator"), isource.Get("ErrorMsg"), isource.Get("StreamerId"))
	if err != nil {
		panic(err)
	}
}

// Deduplicate 去重
func (store *StoreSource) Deduplicate(target Target, field string) {
	sql := `DELETE FROM ` + store.table + ` WHERE uid NOT IN (SELECT MAX(s.uid) FROM (SELECT uid, ` + field + ` FROM ` + store.table + ` force index(target_type_idx) WHERE target_type = "` + string(target) + `" ) s GROUP BY s.` + string(field) + `) ;`
	_, err := store.db.Exec(sql)
	if err != nil {
		panic(err)
	}
}

// Update 更新数据
func (store *StoreSource) Update(isource IGet) {
	_, err := store.db.Exec("update "+store.table+" set  ext = ?, pass_gob = ?, operator = ?, error_msg = ? where uid = ?", isource.Get("Ext"), isource.Get("PassGob"), isource.Get("Operator"), isource.Get("ErrorMsg"), isource.Get("Uid"))
	if err != nil {
		panic(err)
	}
}

// UpdateOperator 更新数据操作标志位
func (store *StoreSource) UpdateOperator(isource IGet) {
	_, err := store.db.Exec("update "+store.table+" set  operator = ?, error_msg = ? where uid = ?", isource.Get("Operator"), isource.Get("ErrorMsg"), isource.Get("Uid"))
	if err != nil {
		panic(err)
	}
}

// UpdateError 更新错误数据
func (store *StoreSource) UpdateError(isource IGetSet, err error) {
	isource.Set("Operator", int32(OperatorError)+isource.Get("Operator").(int32))
	isource.Set("ErrorMsg", sql.NullString{String: err.Error(), Valid: true})
	_, dberr := store.db.Exec("update "+store.table+" set  operator = ?, error_msg = ? where uid = ?", isource.Get("Operator"), isource.Get("ErrorMsg"), isource.Get("Uid"))
	if dberr != nil {
		// email tell owner to deal with
		panic(err)
	}
}

// Restore 恢复Operator数据状态
func (store *StoreSource) Restore(isource IGet) {
	_, dberr := store.db.Exec("update "+store.table+" set  operator = ?  where uid = ?", isource.Get("LastOperator"), isource.Get("Uid"))
	if dberr != nil {
		// email tell owner to deal with
		panic(dberr)
	}
}

// Pop 弹出一条未处理的数据
func (store *StoreSource) Pop(targetType Target, operators ...int32) (*Source, error) {

	tx, err := store.db.Begin()
	if err != nil {
		return nil, err
	}
	var args = []interface{}{string(targetType)}
	selectSQL := `select uid, url, target_type, source, ext, operator, update_time, streamer_id from ` + store.table + ` where target_type = ?`
	if len(operators) == 0 {
		selectSQL += " and operator = ?"
		args = append(args, 0)
	} else {
		for _, operator := range operators {
			selectSQL += " and operator = ?"
			args = append(args, operator)
		}
	}

	// log.Println(selectSQL + ` limit 1 for update`)
	row := tx.QueryRow(selectSQL+` limit 1 for update`, args...)

	defer func() {
		err := tx.Commit()
		if err != nil {
			log.Println(err)
			err = tx.Rollback()
			if err != nil {
				log.Println(err)
			}
		}
		store.popCount++
	}()

	s := &Source{}
	// uid, url, target_type, source, ext, operator
	err = row.Scan(&s.Uid, &s.Url, &s.Target, &s.Source, &s.Ext, &s.Operator, &s.UpdateTime, &s.StreamerId)
	if err != nil {
		return nil, err
	}

	s.Set("LastOperator", s.Operator)
	_, err = tx.Exec("update "+store.table+" set operator = ? where uid = ?", OperatorWait, s.Uid)
	return s, nil
}

// StreamerTable 主播表名称
const StreamerTable string = "streamer"

// CollectLogTable 采集日志表
const CollectLogTable string = "collect_log"

type StoreExtractor struct {
	db *sql.DB

	popCount   int
	errorCount int
	errorLimit int
}

func (store *StoreExtractor) PopCount() int {
	return store.popCount
}

func (store *StoreExtractor) Close() error {
	return store.db.Close()
}

func (store *StoreExtractor) errorAlarm(err error) {
	if err != nil {
		log.Println("store error: ", err)
		// 报警. 如果数据插入有问题
		store.errorCount++
		if store.errorCount >= store.errorLimit {
			// 数据库频繁操作初问题 报警, 减少没意义的请求
		}
	} else {
		if store.errorCount > 0 {
			store.errorCount--
		}
	}
}

// NewStoreExtractor 生成一个extractor库的相关链接
func NewStoreExtractor() *StoreExtractor {
	db, err := sql.Open("mysql", InitConfig.Database.ExtractorURI)
	if err != nil {
		panic(err)
	}
	return &StoreExtractor{db: db}
}

// Pop 弹出一条未处理的数据
func (store *StoreExtractor) Pop(platform Platform, operators ...int32) (*Streamer, error) {

	tx, err := store.db.Begin()
	if err != nil {
		return nil, err
	}
	var args = []interface{}{string(platform)}
	selectSQL := `select uid, update_time, user_id, update_url, is_update_streamer from ` + StreamerTable + ` where platform = ? and  TIMESTAMPDIFF(MINUTE , update_time, CURRENT_TIMESTAMP()) >= update_interval`
	if len(operators) == 0 {
		selectSQL += " and operator = ?"
		args = append(args, 0)
	} else {
		for _, operator := range operators {
			selectSQL += " and operator = ?"
			args = append(args, operator)
		}
	}

	defer func() {
		err := tx.Commit()
		if err != nil {
			log.Println(err)
			err = tx.Rollback()
			if err != nil {
				log.Println(err)
			}
		}
		store.popCount++
	}()

	// log.Println(selectSQL + ` limit 1 for update`)
	row := tx.QueryRow(selectSQL+` limit 1 for update`, args...)

	s := &Streamer{}
	// uid, url, target_type, source, ext, operator
	err = row.Scan(&s.Uid, &s.UpdateTime, &s.UserId, &s.UpdateUrl, &s.IsUpdateStreamer)
	if err != nil {
		return nil, err
	}
	s.Set("LastOperator", s.Operator)
	_, err = tx.Exec("update "+StreamerTable+" set operator = ? where uid = ?", OperatorWait, s.Uid)
	return s, nil
}

// InsertStreamer Streamer表, 插入数据
func (store *StoreExtractor) InsertStreamer(streamer IGet) (isExists bool) {
	// select uid from table where platform = ? and user_id = ?
	selectSQL := "SELECT is_update_url FROM " + StreamerTable + " WHERE platform = ? AND user_id = ?"
	tx, err := store.db.Begin()
	if err != nil {
		panic(err)
	}

	defer func() {
		err = tx.Commit()
		if err != nil {
			rerr := tx.Rollback()
			if rerr != nil {
				log.Println(rerr)
			}
			panic(err)
		}
	}()

	row := tx.QueryRow(selectSQL+` LIMIT 1 FOR UPDATE`, streamer.Get("Platform"), streamer.Get("UserId"))
	var isUpdateUrl bool
	if err = row.Scan(&isUpdateUrl); err == nil {
		if isUpdateUrl {
			tx.Exec("UPDATE "+StreamerTable+" SET update_url = ?", streamer.Get("UpdateUrl"))
		}
		return true
	}

	_, err = tx.Exec("INSERT INTO "+StreamerTable+"(platform, user_id, update_url, update_time) VALUES(?,?,?,?);", streamer.Get("Platform"), streamer.Get("UserId"), streamer.Get("UpdateUrl"), time.Now().Add(-time.Minute*30))
	if err != nil {
		panic(err)
	}
	return false
}

// UpdateError 更新错误数据
func (store *StoreExtractor) UpdateError(isource IGetSet, err error) {
	isource.Set("Operator", int32(OperatorError)+isource.Get("Operator").(int32))
	isource.Set("ErrorMsg", sql.NullString{String: err.Error(), Valid: true})
	_, dberr := store.db.Exec("update "+StreamerTable+" set  operator = ?, error_msg = ? where uid = ?", isource.Get("Operator"), isource.Get("ErrorMsg"), isource.Get("Uid"))
	if dberr != nil {
		// email tell owner to deal with
		panic(err)
	}
}

// UpdateStreamerLog 只更新Streamer的关联日志和时间戳
func (store *StoreExtractor) UpdateStreamerLog(latestUid int64, streamerUid int64) {
	_, err := store.db.Exec("UPDATE "+StreamerTable+" SET  latest_log_uid = ?,  update_time = CURRENT_TIMESTAMP() WHERE uid = ?", latestUid, streamerUid)
	if err != nil {
		panic(err)
	}
}

// UpdateOperator Streamer表, 插入数据
func (store *StoreExtractor) UpdateOperator(isource IGet) {
	_, err := store.db.Exec("update "+StreamerTable+" set  operator = ?, error_msg = ? where uid = ?", isource.Get("Operator"), isource.Get("ErrorMsg"), isource.Get("Uid"))
	if err != nil {
		panic(err)
	}
}

// UpdateStreamer Streamer表, 插入数据
func (store *StoreExtractor) UpdateStreamer(isource IGet) {
	_, err := store.db.Exec("UPDATE "+StreamerTable+" SET user_name = ?,  live_url = ?, channel = ?, latest_log_uid = ?, ext = ?, operator = ?, update_time = ? WHERE uid = ?;",
		isource.Get("UserName"), isource.Get("LiveUrl"), isource.Get("Channel"), isource.Get("LatestLogUid"), isource.Get("Ext"), isource.Get("Operator"), isource.Get("UpdateTime"), isource.Get("Uid"))
	if err != nil {
		panic(err)
	}
}

// InsertCollectLog CollectLog表插入数据
func (store *StoreExtractor) InsertCollectLog(isource IGet) int64 {
	tx, err := store.db.Begin()

	defer func() {
		if err := recover(); err != nil {
			tx.Rollback()
			log.Panic(err)
		}
	}()

	if err != nil {
		panic(err)
	}

	result, err := tx.Exec("insert  into "+CollectLogTable+"(streamer_uid, platform, user_id,  is_live_streaming, is_error, followers, views, giver, gratuity, live_title, live_start_time, live_end_time, update_time, tags, ext, error_msg) values(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)",
		isource.Get("StreamerUid"), isource.Get("Platform"), isource.Get("UserId"), isource.Get("IsLiveStreaming"), isource.Get("IsError"), isource.Get("Followers"), isource.Get("Views"), isource.Get("Giver"), isource.Get("Gratuity"), isource.Get("LiveTitle"), isource.Get("LiveStartTime"), isource.Get("LiveEndTime"), isource.Get("UpdateTime"), isource.Get("Tags"), isource.Get("Ext"), isource.Get("ErrorMsg"),
	)
	if err != nil {
		panic(err)
	}

	logUid, err := result.LastInsertId()
	if err != nil {
		panic(err)
	}

	_, err = tx.Exec("update "+StreamerTable+" set latest_log_uid = ? where uid = ?", logUid, isource.Get("StreamerUid"))
	if err = tx.Commit(); err != nil {
		panic(err)
	}
	return logUid
}