package timer

import (
	"cmp"
	"sig-pub/pkg/utils/container"
	"sync"
	"sync/atomic"
	"time"
)

type timerTask struct {
	ExecuteAt int64
	Canceled  atomic.Bool
	Handler   func()
}

// Timer todo 使用二叉树堆的定时任务执行器
type Timer[T any] struct {
	mu     sync.RWMutex
	heap   *container.Heap[T, int64]
	tick   time.Duration
	ticker *time.Ticker
}

func NewTimer[T any, C cmp.Ordered](tick time.Duration, compare func(T) int64) *Timer[T] {
	return &Timer[T]{
		heap: container.NewHeap(compare),
		tick: tick,
	}
}

func (t *Timer[T]) Init() {
	t.ticker = time.NewTicker(t.tick)
	go func() {
		for {
			now, ok := <-t.ticker.C
			if !ok {
				return
			}
			t.mu.RLock()
			v, ok := t.heap.Peek()
			t.mu.RUnlock()
			if !ok {
				continue
			}
			_, _ = now, v
			// todo handler
		}
	}()
	// time.Unix()
	// t.ticker.C
}

func (t *Timer[T]) Push(v T, duration time.Duration) {
	t.heap.Push(v)
}