package timeslice

import (
	"context"
	"errors"
	"fmt"
	"github.com/hashicorp/go-multierror"
	"golang.org/x/sync/errgroup"
	"math/rand"
	"sync"
	"testing"
	"time"
)

func ProcessTasks() error {
	eg := new(errgroup.Group)
	eg.SetLimit(5)

	for i := 0; i < 5; i++ {
		eg.Go(func() error {
			// 任务逻辑...
			time.Sleep(100 * time.Millisecond)

			return fmt.Errorf("任务失败")
		})
	}

	return eg.Wait() // 仅返回第一个错误
}

func TestNewManager(t *testing.T) {

	// 解析起始时间和结束时间
	start, err := time.Parse(time.DateTime, "2023-01-01 00:00:00")
	if err != nil {
		t.Fatalf("查询失败: %v", err)
		return
	}

	//end, err := time.Parse(time.DateTime, "2023-01-31 02:00:01")
	end, err := time.Parse(time.DateTime, "2023-01-02 02:00:01")
	if err != nil {
		t.Fatalf("查询失败: %v", err)
		return
	}

	var results []string
	callback := func(ctx context.Context, req *Task) error {
		// 模拟任务执行，休眠随机时间
		time.Sleep(time.Duration(rand.Intn(3)) * time.Second)
		// 生成任务执行结果
		result := fmt.Sprintf("任务批次 %d-%s: %s 至 %s 处理完成", req.TaskID, req.Process.Manager.ProductNo, req.CurrentStartTime.Format(time.DateTime), req.CurrentEndTime.Format(time.DateTime))
		results = append(results, result)
		//return nil
		return fmt.Errorf("任务执行失败:%d-%s,时间%s-%s", req.TaskID, req.Process.Manager.ProductNo, req.CurrentStartTime.Format(time.DateTime), req.CurrentEndTime.Format(time.DateTime))
	}

	startTime := time.Now()
	startStr := time.Now().String()

	srv := NewManager(callback)
	taskCount, err := srv.Run(context.Background(), &Manager{
		StartTime: start,
		EndTime:   end,
		ProductNo: "no123456",
		GoNum:     2,
	})

	// 输出结果
	fmt.Printf("总任务数:%d\n", taskCount)
	for _, result := range results {
		fmt.Printf("%v\n", result)
	}

	if err != nil {
		multiErr, ok := err.(*multierror.Error)
		if ok {
			for i, err := range multiErr.Errors {
				fmt.Printf("错误 %d: %v\n", i+1, err)
			}
		} else {
			// 不是多错误，单独处理
			t.Error("单个错误", err)
		}
	}

	endTime := time.Now()
	fmt.Printf("处理耗时:%s,开始处理时间:%s,结束时间%s\n", startStr, endTime.Sub(startTime).String(), endTime.String())
}

func TestBatchCallBackFunc(t *testing.T) {
	// 初始化开始时间和结束时间
	start, err := time.Parse(time.DateTime, "2025-01-01 01:00:00")
	if err != nil {
		t.Fatalf("%v", err)
		return
	}
	end, err := time.Parse(time.DateTime, "2025-01-02 02:00:01")
	if err != nil {
		t.Fatalf("%v", err)
		return
	}

	// 确保开始时间小于结束时间
	if start.After(end) {
		t.Fatalf("start_time不能大于end_time")
		return
	}

	var wg sync.WaitGroup
	// 按照每天的时间单位分片
	duration := 24 * time.Hour // 每个时间段为一天

	// 循环处理时间段
	for current := start; current.Before(end); current = current.Add(duration) {
		// 计算当前时间段的结束时间
		next := current.Add(duration)

		// 如果下一个结束时间超过了实际的结束时间，则调整为实际结束时间
		if next.After(end) {
			next = end
		}

		t.Logf("处理时间: %s到%s", current.Format(time.DateTime), next.Format(time.DateTime))

		wg.Add(1)
		// 启动goroutine处理每个时间段
		go func(startTime, endTime time.Time) {
			defer func() {
				wg.Done()
				if err2 := recover(); err2 != nil {
					t.Error("panic", err2)
				}
			}()
			if err3 := CallbackFunc(startTime, endTime); err3 != nil {
				t.Errorf("任务执行失败:%v\n", err3)
			}
		}(current, next)
	}

	// 等待所有的 goroutine 完成
	wg.Wait()
}

func CallbackFunc(start, end time.Time) error {

	nowTime := time.Now()

	managerStartStr := start.Format(time.DateTime)
	managerEndStr := end.Format(time.DateTime)

	req := &Manager{
		StartTime: start,
		EndTime:   end,
		ProductNo: "no123456",
		GoNum:     2,
	}

	taskCount, err := NewManager(callbackFunc).Run(context.Background(), req)
	if err != nil {
		var multiErr *multierror.Error
		if errors.As(err, &multiErr) {
			for i, err := range multiErr.Errors {
				fmt.Printf("%s到%s,错误 %d: %v\n", managerStartStr, managerEndStr, i+1, err)
			}
		} else {
			// 不是多错误，单独处理
			fmt.Printf("单个错误%v", err)
		}
	}

	fmt.Printf("%s到%s,总任务数:%d\n", managerStartStr, managerEndStr, taskCount)

	endTime := time.Now()
	fmt.Printf("%s到%s,处理耗时:%s,开始处理时间:%s,结束时间%s\n", managerStartStr, managerEndStr, endTime.Sub(nowTime).String(), nowTime.Format(time.DateTime), endTime.Format(time.DateTime))

	return nil
}

func callbackFunc(_ context.Context, req *Task) error {

	managerStartTimeStr := req.Process.Manager.StartTime.Format(time.DateTime)
	managerEndTimeStr := req.Process.Manager.EndTime.Format(time.DateTime)

	currentStartTimeStr := req.CurrentStartTime.Format(time.DateTime)
	currentEndTimeStr := req.CurrentEndTime.Format(time.DateTime)

	start := time.Now()
	startStr := start.Format(time.DateTime)

	n := 0
	num := 0
	notifyNum := 0

	for i := 0; i < 3; i++ {

		groupStartTime := time.Now()
		// 模拟任务执行，休眠随机时间
		time.Sleep(time.Duration(rand.Intn(3)) * time.Second)

		n += 1
		num = num + (i+1)*100

		logFields := map[string]interface{}{
			"处理条数":     num,
			"通知条数":     notifyNum,
			"耗时":       time.Now().Sub(groupStartTime).String(),
			"任务处理开始时间": currentStartTimeStr,
			"任务处理结束时间": currentEndTimeStr,
		}
		fmt.Printf("%s到%s,第%d个任务，第%d组,处理完毕, %+v\n", managerStartTimeStr, managerEndTimeStr, req.TaskID, i+1, logFields)
	}

	end := time.Now()
	logFields := map[string]interface{}{
		"总处理组数":    n,
		"总处理条数":    num,
		"总通知条数":    notifyNum,
		"执行任务开始时间": startStr,
		"执行任务结束时间": end.Format(time.DateTime),
		"总处理耗时":    end.Sub(start).String(),
		"任务处理开始时间": currentStartTimeStr,
		"任务处理结束时间": currentEndTimeStr,
	}

	// 生成任务执行结果
	result := fmt.Sprintf("%s到%s，第%d个任务,处理完毕,%+v\n", managerStartTimeStr, managerEndTimeStr, req.TaskID, logFields)
	fmt.Printf(result)

	return nil
}