package service

import (
	"fmt"
	"math"
	"samba/pkg/log"
	"sync/atomic"
	"time"

	cmap "github.com/orcaman/concurrent-map/v2"
)

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

type Timer struct {
	chTimer chan *timerData
	timers  cmap.ConcurrentMap[uint32, *timerData]
	no      uint32
}

func NewTimer() *Timer {
	rt := &Timer{}
	rt.chTimer = make(chan *timerData, 16)
	rt.timers = cmap.NewWithCustomShardingFunction[uint32, *timerData](func(key uint32) uint32 { return key })
	rt.no = math.MaxUint32 - 2
	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),
		cb:      cb,
		needLog: needLog,
	}
	if len(desc) > 0 {
		tData.desc = desc[0]
	}
	t := time.AfterFunc(duration, func() {
		rt.chTimer <- tData
		rt.timers.Remove(tData.id)
		if needLog {
			if tData.desc != "" {
				log.Debug(fmt.Sprintf("移除定时器:%v NewTimer desc:%v time:%v", tData.id, tData.desc, duration))
			} else {
				log.Debug(fmt.Sprintf("移除定时器:%v NewTimer", tData.id))
			}
		}
	})
	tData.timer = t
	rt.timers.Set(tData.id, tData)
	if needLog {
		if tData.desc != "" {
			log.Debug(fmt.Sprintf("设置定时器:%v NewTimer desc:%v", tData.id, tData.desc))
		} else {
			log.Debug(fmt.Sprintf("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.Debug(fmt.Sprintf("移除定时器:%v CancelTimer desc:%v", t.id, t.desc))
			} else {
				log.Debug(fmt.Sprintf("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.Debug(fmt.Sprintf("移除定时器:%v CancelAllTimer desc:%v", t.id, t.desc))
				} else {
					log.Debug(fmt.Sprintf("移除定时器:%v CancelAllTimer", t.id))
				}
			}
		}
	})
	rt.timers.Clear()
}

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

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