package echomeet

import (
	"yunyan/comm"
	"yunyan/lego/sys/mysql"
	"yunyan/pb"
	"encoding/json"
	"time"
)

// @Summary 启动会议转写任务
// @Description 扣除积分并启动指定会议记录的转写/翻译任务，根据源语言自动路由到字节或阿里云
// @Tags Echomeet
// @Accept  json
// @Produce  json
// @Security BearerAuth
// @Param user body pb.EchomeetStartTaskReq true "请求数据"
// @Success 200 {object} comm.HttpResult{data=pb.EchomeetStartTaskResp} "响应数据"
// @Router /api/home/echomeet_starttask [post]
func (this *apiComp) StartTask(session comm.IUserSession, req *pb.EchomeetStartTaskReq) (resp *pb.EchomeetStartTaskResp, errdata *pb.ErrorData) {
	var (
		user  *pb.DBUser
		model *pb.DBEchoMeetRecord
		err   error
	)

	user, err = this.module.model.getuser(session.GetUserId())
	if err != nil {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_DBError,
			Message: err.Error(),
		}
		return
	}
	model, err = this.module.model.getrecord(req.Id)
	if err != nil {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_DBError,
			Message: err.Error(),
		}
		return
	}
	if model.State > pb.DBEchoMeetRecordState_Unknow && model.State < pb.DBEchoMeetRecordState_Completed {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_TaskStateError,
			Message: "任务状态错误",
		}
		return
	}
	// ── 准入：会议纪要需要 VIP（自购 或 当前绑定设备赋予，见 comm.ResolveVip）──
	if vip, _, verr := comm.ResolveUserVip(user.Uid, user); verr == nil && !vip.Active(time.Now().Unix()) {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_VipRequired,
			Message: "会议纪要需要会员，请续费或绑定带会员的设备",
		}
		return
	}
	// ── 计量：会议时长服务端自己知道（model.Seconds），按换算系数折成算力记账。
	//    先设备赠送、再用户余额；闸门默认关，不够也放行、差额记超额。──
	statistics, sErr := this.module.model.getStatistics(session.GetUserId())
	if sErr != nil && sErr != mysql.ErrNoDocuments {
		errdata = &pb.ErrorData{Code: pb.ErrorCode_DBError, Message: sErr.Error()}
		return
	}
	statistics.Meetnum += 1
	statistics.Meettime += int64(model.Seconds)
	userlog := &pb.DBUserUseLog{
		Uid:           session.GetUserId(),
		Logtype:       pb.UserLogType_UserConsume,
		Ts:            time.Now().Unix(),
		Addmeetsecond: -1 * int64(model.Seconds),
	}
	res, cerr := comm.ApplyComputeUsage(user.Uid, comm.ComputeUsageMeeting, int64(model.Seconds), userlog, statistics)
	if cerr != nil {
		errdata = &pb.ErrorData{Code: pb.ErrorCode_DBError, Message: cerr.Error()}
		return
	}
	if res.Rejected {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_ComputeNotEnough,
			Message: "算力不足",
		}
		return
	}
	// 会议时长消耗埋点
	if this.module.analyze != nil {
		this.module.analyze.Report(&comm.StatEvent{
			Type:      comm.StatEventMeeting,
			ProductId: user.Lastbindproductid,
			ChannelId: user.Lastbindchannelid,
			Uid:       user.Uid,
			Second:    int64(model.Seconds),
		})
	}
	// 同步更新累计统计（排行榜依赖此表）+ 消费日志（供历史重建扫描）
	if uErr := this.module.model.updateStatistics(statistics); uErr != nil {
		this.module.Warnf("StartTask id:%d update userstatistics failed: %v", model.Id, uErr)
	}
	_ = this.module.model.addUseLog(userlog)

	tmpl, err := this.module.cache.ResolveTemplate(req.Tid, req.Templateid, req.Tolanguage)
	if err != nil {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_TemplateNotFound,
			Message: "模板不存在或不支持该语言",
		}
		this.module.Errorf("StartTask id:%d req:%+v 解析模板失败 err:%v", model.Id, req, err)
		return
	}
	model.State = pb.DBEchoMeetRecordState_AwaitTranscribing
	model.Starttime = time.Now().Unix()
	model.Processduration = 0
	model.Templateid = tmpl.Id
	model.Isdistinguishspeaker = req.Isdistinguishspeaker
	model.Formlanguage = req.Formlanguage
	model.Tolanguage = req.Tolanguage

	// 三段选路（后台编排，fail-closed：未配置直接报错提示去后台配置）：
	//  - 识别/翻译：按后台优先级 + 语言支持过滤，客户端不可指定；
	//  - 总结：后台默认模型；开关允许时客户端可用 summary_svc_id 指定。
	llmSvcId, _, err := this.module.providers.PickLLM(req.SummarySvcId)
	if err != nil {
		errdata = &pb.ErrorData{Code: pb.ErrorCode_SystemError, Message: err.Error()}
		return
	}
	model.LlmSvcId = llmSvcId
	// 翻译：源=目标语言时无需翻译，选路失败不阻断（后续改语言重译时再补选）。
	if mtSvcId, _, merr := this.module.providers.PickMT(model.Formlanguage); merr == nil {
		model.MtSvcId = mtSvcId
	} else if model.Formlanguage != model.Tolanguage {
		errdata = &pb.ErrorData{Code: pb.ErrorCode_SystemError, Message: merr.Error()}
		return
	}

	if model.Rtype == "VOICETRANSLAT" {
		// 语音翻译：已有转写文本，只走翻译+总结，无需识别选路。
		this.module.model.saverecord(model)
		this.module.Infof("StartTask id:%d → 语音翻译 mt:%s llm:%s", model.Id, model.MtSvcId, model.LlmSvcId)
		var contexts []*pb.ContextStruct
		if err = json.Unmarshal([]byte(model.Original), &contexts); err != nil {
			this.module.Errorf("Summary id:%d 解析 Original 失败 err:%v", model.Id, err)
			errdata = &pb.ErrorData{
				Code:    pb.ErrorCode_SystemError,
				Message: "json.Unmarshal Original 失败",
			}
			return
		} else {
			this.module.tasks.TranslateProcess(model, contexts)
			_ = this.module.tasks.SubmitAITask(model)
		}
		return
	}

	if model.Audiourl == "" {
		errdata = &pb.ErrorData{
			Code:    pb.ErrorCode_AudioUrlEmpty,
			Message: "音频URL为空",
		}
		return
	}
	asrSvcId, _, _, err := this.module.providers.PickASR(model.Formlanguage)
	if err != nil {
		errdata = &pb.ErrorData{Code: pb.ErrorCode_SystemError, Message: err.Error()}
		return
	}
	model.AsrSvcId = asrSvcId
	this.module.model.saverecord(model)

	this.module.Infof("StartTask id:%d uid:%s formlang:%s tolang:%s seconds:%d size:%d distinguishSpeaker:%v asr:%s mt:%s llm:%s",
		model.Id, model.Uid, model.Formlanguage, model.Tolanguage, model.Seconds, model.Size, model.Isdistinguishspeaker,
		model.AsrSvcId, model.MtSvcId, model.LlmSvcId)

	// 字节短音频走专用限流队列（flash 同步通道）；其余统一走通用异步提交。
	if this.module.providers.ASRProvider(asrSvcId) == "bytedance" &&
		model.Seconds <= byteDanceFlashMaxSeconds && model.Size <= byteDanceFlashMaxBytes {
		_ = this.module.tasks.SubmitShortAudioTask(model)
	} else {
		_ = this.module.tasks.SubmitTranscribeTask(model)
	}
	resp = &pb.EchomeetStartTaskResp{}
	return
}