package main

import (
	"fmt"
	// "sync"
	// "math"
	"time"
)

func main() {
	// var wg sync.WaitGroup
	// 事件生成器
	ch := make(chan string)
	go func() {
		ch <- "first"
		for i :=0 ;; i++ {
			ch <- fmt.Sprintf("%v, hhh", i)
			time.Sleep(time.Second)
			if (i>2) {
				i = 0
			}
		}
	}()
	// 事件接收器（重复事件执行一次）
	eventMap := make(map[string]bool)
	go func() {
		for {
			x := <-ch
			eventMap[x] = true
			fmt.Printf("recv event: %v\n", x)
		}
	}()
	// 事件处理器
	go func() {
		for {
			if (len(eventMap) > 0) {
				worker(eventMap)
				eventMap = make(map[string]bool)
			}
			time.Sleep(time.Second * 10)
		}
	}()


	for {
		time.Sleep(time.Second)
	}

	
	// for i := 0; i < math.MaxInt32; i++ {
	// 	wg.Add(1)
	// 	go func(i int) {
	// 		defer wg.Done()
	// 		fmt.Println(i)
	// 		time.Sleep(time.Second)
	// 	}(i)
	// }
	// wg.Wait()
}

func worker(evMap map[string]bool) {
	for k,_ := range(evMap) {
		fmt.Printf("Handle %v\n", k)
	}
}