package p

import (
	"app.yhyue.com/moapp/jybase/redis"
	"sync/atomic"
	"time"

	"app.yhyue.com/moapp/jybase/logger"
)

type Lock struct {
	Key   string
	Push  string
	Match string
	E_C   int64
	E_I   bool
}

//
func (l *Lock) Lock(key string) {
	atomic.AddInt64(&l.E_C, 1)
	for {
		if l.E_I {
			break
		}
		v, err := redis.IncrByErr(l.Key, key)
		if err == nil {
			if v == 1 {
				if key == l.Match {
					redis.PutCKV(l.Key, l.Push, 1)
				} else if key == l.Push {
					redis.PutCKV(l.Key, l.Match, 1)
				}
				break
			}
		} else {
			logger.Error("lock redis inc error", err)
		}
		logger.Info("目前处于锁住状态，等待", key, "执行完成")
		time.Sleep(1 * time.Minute)
	}
	l.E_I = true
}

//
func (l *Lock) UnLock() {
	if atomic.AddInt64(&l.E_C, -1) <= 0 {
		l.E_I = false
		l.Clear(l.Push, l.Match)
	}
}

//
func (l *Lock) Clear(keys ...interface{}) {
	redis.Del(l.Key, keys...)
}