package transcode

import (
	"context"
	"easyaudioencode/internal/core/audioencode"
	"easyaudioencode/internal/core/host"
	"easyaudioencode/pkg/ffmpeg"
	"fmt"
	"log/slog"
	"strconv"
	"time"
)

type Core struct {
	HostCore        *host.Core
	AudioEncodeCore *audioencode.Core
	WorkflowCore    *Workflow
}

func NewCore(HostCore *host.Core, AudioEncodeCore *audioencode.Core) *Core {
	core := &Core{
		HostCore:        HostCore,
		AudioEncodeCore: AudioEncodeCore,
		WorkflowCore:    OpenAudioEncode(AudioEncodeCore),
	}
	// 启用任务管理器
	return core
}

func OpenAudioEncode(AudioEncodeCore *audioencode.Core) *Workflow {
	wf := NewWorkflow(WorkflowConfig{
		MaxConcurrency:  100,              // 并发
		CleanupInterval: 30 * time.Second, // 每30秒清理一次
		MaxTaskHistory:  500,              // 最多保留500个任务历史
		RetentionTime:   60 * time.Second, // 任务保留1分钟
	})
	// 设置回调函数
	wf.SetCallbacks(
		// 完成回调
		func(task *Task) {
			id, _ := strconv.Atoi(task.ID)
			err := AudioEncodeCore.AudioTaskStatus(int(TaskCompleted), id)
			if err != nil {
				slog.Error("AudioTaskStatus", "status", TaskCompleted, "err", err.Error())
			}
			slog.Info(fmt.Sprintf("任务完成: ID=%s, Type=%s, 耗时=%v",
				task.ID, task.Type, task.endTime.Sub(task.startTime)))
		},
		// 取消回调
		func(task *Task) {
			id, _ := strconv.Atoi(task.ID)
			err := AudioEncodeCore.AudioTaskStatus(int(TaskCancelled), id)
			if err != nil {
				slog.Error("AudioTaskStatus", "status", TaskCancelled, "err", err.Error())
			}
			task.isEnd = true
			slog.Info(fmt.Sprintf("任务取消: ID=%s, Type=%s", task.ID, task.Type))
		},
		// 错误回调
		func(task *Task, errs error) {
			id, _ := strconv.Atoi(task.ID)
			err := AudioEncodeCore.AudioTaskStatusError(id, int(TaskFailed), errs.Error())
			if err != nil {
				slog.Error("AudioTaskStatus", "status", TaskFailed, "err", err.Error())
			}
			task.isEnd = true
			slog.Info(fmt.Sprintf("任务失败: ID=%s, Type=%s, 错误=%v",
				task.ID, task.Type, err))
		},
		// 清理回调
		func(task *Task, reason string) {
			slog.Info(fmt.Sprintf("任务清理: ID=%s, 原因=%s", task.ID, reason))
		},
	)
	return wf
}

func (c Core) WorkflowExecute(ctx context.Context, t *Task) error {
	slog.Info(fmt.Sprintf("开始执行任务: %s (类型: %s)", t.ID, t.Type))
	if c.WorkflowCore.GetIsTasks(t.Type) {
		time.Sleep(11 * time.Second)
	}
	//return fmt.Errorf("请求失败")
	in := &host.FindTalkInput{
		ChannelID: t.Type,
	}
	info, err := c.HostCore.FindTalkUrl(ctx, in)
	if err != nil {
		return fmt.Errorf("FindTalkUrl: %v", err.Error())
	}
	slog.Info(fmt.Sprintf("开始执行任务: URL:[%s] 类型:[%s]", info.TalkUrl, info.Transport))
	go func(in *host.FinTalkOutput) {
		t.quit <- t.StartTalkCode(in.TalkUrl, in.Transport)
	}(info)
	select {
	case errs := <-t.quit:
		slog.Info("处理异常退出", "id", t.ID)
		return errs
	case <-t.success:
		slog.Info("处理完成", "id", t.ID)
		return nil
	// 用于测试
	//case <-time.After(30 * time.Second):
	//	slog.Info("任务完成", "id", t.ID)
	//	t.isEnd = true
	//	return nil
	case <-ctx.Done():
		slog.Error("任务中断", "id", t.ID)
		t.isEnd = true
		return ctx.Err()
	}
}

func (c Core) AddTask(id int, bid string, EncodeUrl string, duration int64) error {
	newTask := &Task{
		ID:        strconv.Itoa(id),
		Type:      bid,
		EncodeUrl: EncodeUrl,
		Duration:  duration,
		quit:      make(chan error, 3),
		success:   make(chan struct{}),
		isEnd:     false,
		execute:   c.WorkflowExecute,
	}
	err := c.WorkflowCore.AddTask(newTask)
	if err != nil {
		slog.Error("添加任务失败", "id", id, "err", err.Error())
		return fmt.Errorf("添加任务失败 【%d】%v", id, err.Error())
	}
	slog.Info("添加任务成功", "id", id)
	return nil
}
func (c Core) CancelTask(id int) error {
	if c.WorkflowCore.CancelTask(strconv.Itoa(id)) {
		slog.Info("已取消任务", "id", id)
		return nil
	}
	slog.Warn("取消的任务不存在或者已被取消", "id", id)
	return fmt.Errorf("取消的任务不存在或者已被取消 %d", id)
}
func (c Core) GetTaskInfo(id int) (*TaskInfo, error) {
	task, t := c.WorkflowCore.GetTaskInfo(strconv.Itoa(id))
	if !t {
		slog.Debug("查询任务详情失败", "id", id)
		return &TaskInfo{}, fmt.Errorf("查询任务详情失败 %d", id)
	}
	return task, nil
}

// StartAudioEncode 转码
func (c Core) StartAudioEncode(inputFile, outputFile string, id int) {

	go func() {
		status := audioencode.EncodeStatusSuccess
		err := ffmpeg.TranscodeToG711AFile(inputFile, outputFile)
		if err != nil {
			slog.Error("StartAudioEncode TranscodeToG711AFile", "err", err.Error())
			status = audioencode.EncodeStatusFailed
		}
		err = c.AudioEncodeCore.AudioEncodeStatus(status, id)
		if err != nil {
			slog.Error("StartAudioEncode AudioEncodeStatus", "err", err.Error())
		}
	}()

	return
}