package timer

import (
	"github.com/fox/fox/log"
	"github.com/fox/fox/safeChan"
	cmap "github.com/orcaman/concurrent-map/v2"
	"math"
	"sync/atomic"
	"time"
)

type timerData struct {
	timer   *time.Timer
	id      uint32
	Func    func()
	desc    string
	needLog bool
}

type Timer struct {
	chTimer *safeChan.SafeChan[*timerData]
	timers  cmap.ConcurrentMap[uint32, *timerData]
	no      uint32
	stop    int32
}

func NewTimer() *Timer {
	rt := &Timer{}
	rt.chTimer = safeChan.NewSafeChan[*timerData](16)
	rt.timers = cmap.NewWithCustomShardingFunction[uint32, *timerData](func(key uint32) uint32 { return key })
	rt.no = math.MaxUint32 - 2
	rt.stop = 0
	return rt
}

func (rt *Timer) NewTimer(duration time.Duration, cb func(), needLog bool, desc ...string) uint32 {
	tData := &timerData{
		timer:   nil,
		id:      atomic.AddUint32(&rt.no, 1),
		Func:    cb,
		needLog: needLog,
	}
	if len(desc) > 0 {
		tData.desc = desc[0]
	}
	t := time.AfterFunc(duration, func() {
		_ = rt.chTimer.Write(tData)
		rt.timers.Remove(tData.id)
		if needLog {
			if tData.desc != "" {
				log.DebugF("移除定时器:%v NewTimer desc:%v time:%v", tData.id, tData.desc, duration)
			} else {
				log.DebugF("移除定时器:%v NewTimer", tData.id)
			}
		}
	})
	tData.timer = t
	rt.timers.Set(tData.id, tData)
	if needLog {
		if tData.desc != "" {
			log.DebugF("设置定时器:%v NewTimer desc:%v", tData.id, tData.desc)
		} else {
			log.DebugF("设置定时器:%v NewTimer", tData.id)
		}
	}

	return tData.id
}

func (rt *Timer) CancelTimer(timerId uint32) {
	if t, _ := rt.timers.Get(timerId); t != nil {
		if t.timer != nil {
			_ = t.timer.Stop()
		}
		rt.timers.Remove(timerId)
		if t.needLog {
			if t.desc != "" {
				log.DebugF("移除定时器:%v CancelTimer desc:%v", t.id, t.desc)
			} else {
				log.DebugF("移除定时器:%v CancelTimer", t.id)
			}
		}
	}
}

func (rt *Timer) CancelAllTimer() {
	rt.timers.IterCb(func(_ uint32, t *timerData) {
		if t.timer != nil {
			t.timer.Stop()
			if t.needLog {
				if t.desc != "" {
					log.DebugF("移除定时器:%v CancelAllTimer desc:%v", t.id, t.desc)
				} else {
					log.DebugF("移除定时器:%v CancelAllTimer", t.id)
				}
			}
		}
	})
	rt.timers.Clear()
}

func (rt *Timer) Reader() <-chan *timerData {
	return rt.chTimer.Reader()
}

func (rt *Timer) Close() {
	rt.chTimer.Close()
}