package common

import (
	"context"
	"fmt"
	"math/rand"
	"os"
	"sync/atomic"
	"testing"
	"time"
)

func TestParallelJobRun(t *testing.T) {
	fmt.Println(os.Getpid())
	start := time.Now()

	// 累计计算
	totalNum := 100*10000*100 + 15
	// 每一个g 计算
	eachNum := 100
	// 累计睡眠
	var sleepNum uint64 = 0
	// 结果
	result := 0
	err := ParallelJobRun(context.Background(), uint64(totalNum), uint64(eachNum), func(ctx context.Context, start, end uint64) (interface{}, error) {
		count := 0
		for ; start < end; start++ {
			count = count + int(start)
		}
		num := rand.Int31n(5)
		atomic.AddUint64(&sleepNum, uint64(num))
		time.Sleep(time.Millisecond * time.Duration(num))
		return count, nil
	}, func(ctx context.Context, data interface{}) error {
		cdata := data.(int)
		result += cdata
		return nil
	}, 1000)
	if err != nil {
		t.Fatal(err)
	}
	fmt.Printf("fork-join count: %v,total_sleep_time: %vs,节省时间: %vs , spend : %vs\n", result, sleepNum/1000, float64(sleepNum/1000)-time.Now().Sub(start).Seconds(), time.Now().Sub(start).Seconds())

	start = time.Now()
	fmt.Printf("check count: %v, spend: %vs\n", count(totalNum), time.Now().Sub(start).Seconds())
	time.Sleep(time.Second * 1000000)
}

func count(totalNum int) int {
	num := 0
	for x := 0; x < totalNum; x++ {
		num = num + x
	}
	return num
}

func TestRunJob(t *testing.T) {
	var jobs []func()
	for x := 0; x < 12; x++ {
		jobs = append(jobs, func() {
			fmt.Println("run ", x)
			time.Sleep(time.Second * 2)
		})
	}
	//RunJob(jobs, 10)
}