package main

import (
	"context"
	"encoding/hex"
	"encoding/json"
	"encoding/xml"
	"errors"
	"runtime/debug"
	"sync/atomic"
	"time"
)

func SendWorker() {
	defer func() {
		if err := recover(); err != nil {
			Error("SendWorker panic", "err", err, "stack", string(debug.Stack()))
			go SendWorker()
		}
	}()
	
	for {
		select {
		case <-finishChan:
			Info("收到完成信号")
		case m, ok := <-msgChan:
			if !ok {
				Fatal("发送通道关闭")
				return
			}
			SendWechatMsg(m)
		}
	}
}

func SendWechatMsg(m *SendMsg) {
	time.Sleep(time.Duration(config.SendInterval) * time.Millisecond)
	currTaskId := atomic.AddInt64(&taskId, 1)
	Info("📩 收到任务", "task_id", currTaskId, "type", m.Type)
	
	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
	defer cancel()
	
	targetId := m.UserId
	if m.GroupID != "" {
		targetId = m.GroupID
	}
	
	if targetId == "" {
		Error("目标为空", "task_id", currTaskId, "target_id", targetId)
		return
	}
	
	switch m.Type {
	case "text":
		result := fridaScript.ExportsCall("triggerSendTextMessage", currTaskId, targetId, m.Content, m.AtUser)
		Info("📩 发送文本任务执行结果", "result", result, "task_id", currTaskId, "target_id", targetId, "at_user", m.AtUser)
		if result != "1" {
			Error("发送文本失败", "task_id", currTaskId, "target_id", targetId, "result", result)
			return
		}
	case "image":
		targetPath, md5Str, err := SaveBase64Image(m.Content)
		if err != nil {
			Error("保存图片失败", "err", err)
			return
		}
		
		result := fridaScript.ExportsCall("triggerUploadImg", targetId, md5Str, targetPath)
		Info("📩 上传图片任务执行结果", "result", result, "target_id", targetId, "md5", md5Str, "path", targetPath)
		if result != "0" {
			Error("上传图片失败", "target_id", targetId, "md5", md5Str, "result", result)
			return
		}
	case "send_image":
		result := fridaScript.ExportsCall("triggerSendImgMessage", currTaskId, myWechatId, targetId)
		Info("📩 发送图片任务执行结果", "result", result, "task_id", currTaskId, "wechat_id", myWechatId, "target_id", targetId)
		if result != "1" {
			Error("上传图片失败", "task_id", currTaskId, "target_id", targetId, "result", result)
			return
		}
	case "video":
		targetPath, md5Str, err := SaveBase64Image(m.Content)
		if err != nil {
			Error("保存图片失败", "err", err)
			return
		}
		
		result := fridaScript.ExportsCall("triggerUploadVideo", targetId, md5Str, targetPath)
		Info("📩 上传视频任务执行结果", "result", result, "target_id", targetId, "md5", md5Str, "path", targetPath)
		if result != "0" {
			Error("上传视频失败", "target_id", targetId, "md5", md5Str, "result", result)
			return
		}
	case "send_video":
		result := fridaScript.ExportsCall("triggerSendVideoMessage", currTaskId, myWechatId, targetId)
		Info("📩 发送视频任务执行结果", "result", result, "task_id", currTaskId, "wechat_id", myWechatId, "target_id", targetId)
		if result != "1" {
			Error("上传图片失败", "task_id", currTaskId, "target_id", targetId, "result", result)
			return
		}
	case "download":
		result := fridaScript.ExportsCall("triggerDownload", targetId, m.FIleCdnUrl, m.AesKey, m.FilePath, m.FileType)
		Info("📩 下载任务执行结果", "result", result, "task_id", currTaskId, "wechat_id", myWechatId, "target_id", targetId)
	}
	
	select {
	case <-ctx.Done():
		Error("任务执行超时！", "taskId", currTaskId)
	case <-finishChan:
		Info("收到完成信号，任务完成", "taskId", currTaskId)
	}
}

func HandleMsg(jsonData []byte) ([]byte, error) {
	m := new(WechatMessage)
	err := json.Unmarshal(jsonData, m)
	if err != nil {
		Error("解析消息失败", "err", err)
		return nil, err
	}
	myWechatId = m.SelfID
	if m.GroupId != "" {
		userID2NicknameMap.Store(m.GroupId+"_"+m.UserID, m.Sender.Nickname)
	}
	
	for _, msg := range m.Message {
		switch msg.Type {
		case "record":
			path, err := SaveAudioFile(msg.Data.Media)
			if err != nil {
				Error("保存音频失败", "err", err)
				return nil, err
			}
			msg.Data.URL = "file://" + path
			msg.Data.Media = nil
		case "image":
			var fileMsg FileMsg
			err = xml.Unmarshal([]byte(msg.Data.Text), &fileMsg)
			if err != nil {
				Error("XML解析失败", "err", err)
				return nil, err
			}
			
			path, err := GetDownloadPath(fileMsg.Image.MidImgURL, fileMsg.Image.AesKey)
			if err != nil {
				Error("获取文件路径失败", "err", err)
				return nil, err
			}
			
			msg.Data.URL = "file://" + path
		
		case "file":
			var fileMsg FileMsg
			err = xml.Unmarshal([]byte(msg.Data.Text), &fileMsg)
			if err != nil {
				Error("XML解析失败", "err", err)
				return nil, err
			}
			path, err := GetDownloadPath(fileMsg.AppMsg.AppAttach.CdnAttachURL, fileMsg.AppMsg.AppAttach.AesKey)
			if err != nil {
				Error("获取文件路径失败", "err", err)
				return nil, err
			}
			
			msg.Data.URL = "file://" + path
		case "video":
			var fileMsg FileMsg
			err = xml.Unmarshal([]byte(msg.Data.Text), &fileMsg)
			if err != nil {
				Error("XML解析失败", "err", err)
				return nil, err
			}
			path, err := GetDownloadPath(fileMsg.Video.CdnVideoUrl, fileMsg.Video.AesKey)
			if err != nil {
				Error("获取文件路径失败", "err", err)
				return nil, err
			}
			
			msg.Data.URL = "file://" + path
		case "face":
			var fileMsg FileMsg
			err = xml.Unmarshal([]byte(msg.Data.Text), &fileMsg)
			if err != nil {
				Error("XML解析失败", "err", err)
				return nil, err
			}
			
			data, err := DownloadFile(fileMsg.Emoji.ThumbUrl)
			if err != nil {
				Error("下载表情失败", "err", err)
				return nil, err
			}
			
			path, err := DetectAndSaveImage(data)
			if err != nil {
				Error("保存表情失败", "err", err)
				return nil, err
			}
			
			msg.Data.URL = "file://" + path
		}
	}
	return json.Marshal(m)
}

func GetDownloadPath(cdnUrl, aesKeyStr string) (string, error) {
	for i := 0; i < 10; i++ {
		if downloadMsgInter, ok := userID2FileMsgMap.Load(cdnUrl); ok {
			downloadReq := downloadMsgInter.(*DownloadRequest)
			if downloadReq.FilePath != "" {
				return downloadReq.FilePath, nil
			}
			
			// 检查数据是否还在接收中
			timeSinceLastAppend := time.Now().UnixMilli() - downloadReq.LastAppendTime
			Info("文件等待下载", "url", cdnUrl, "times", i, "last_append_time", timeSinceLastAppend)
			
			// 如果数据仍在接收中（1秒内有新数据），继续等待
			if timeSinceLastAppend < 1000 && i < 9 {
				time.Sleep(2 * time.Second)
				continue
			}
			
			// 数据接收完成，尝试解密
			if len(downloadReq.Media) > 0 {
				aesKey, err := hex.DecodeString(aesKeyStr)
				if err != nil {
					Error("AES key 解码失败", "err", err)
					return "", err
				}
				filePath, err := GetFilePath(downloadReq.Media, aesKey)
				if err != nil {
					Error("获取文件路径失败", "err", err, "media_len", len(downloadReq.Media))
					userID2FileMsgMap.Delete(cdnUrl)
					return "", err
				}
				
				downloadReq.FilePath = filePath
				downloadReq.Media = nil
				return filePath, nil
			}
		}
		
		time.Sleep(2 * time.Second)
	}
	
	return "", errors.New("文件下载超时或数据为空")
}