package record

import (
	_ "embed"
	"errors"
	"crypto/md5"
	"encoding/hex"
	"io"
	"sync"
	"time"
	"fmt"
	"strconv"
	"strings"
	"go.uber.org/zap"
	"gorm.io/gorm"
	. "m7s.live/engine/v4"
	"m7s.live/engine/v4/codec"
	"m7s.live/engine/v4/config"
	"m7s.live/engine/v4/util"
	"m7s.live/engine/v4/db"
)

type RecordConfig struct {
	config.Subscribe
	Ffmpeg string `json:"ffmpeg"`
	Flv        Record `desc:"flv录制配置"`
	Mp4        Record `desc:"mp4录制配置"`
	Fmp4       Record `desc:"fmp4录制配置"`
	Hls        Record `desc:"hls录制配置"`
	Raw        Record `desc:"视频裸流录制配置"`
	RawAudio   Record `desc:"音频裸流录制配置"`
	recordings sync.Map
}

func getIsRecordByChannelId(channelId string) int {
	database := db.DB()
	isRecord := 0
	err := database.Raw("select is_record from t_sdp_delivery where channel_id=?",channelId).Find(&isRecord).Error
	if err != nil{
		if err == gorm.ErrRecordNotFound{
			return 0 
		}
		return 1
	}
	
	return isRecord
}


//go:embed default.yaml
var defaultYaml DefaultYaml
var ErrRecordExist = errors.New("recorder exist")
var RecordPluginConfig = &RecordConfig{
	Ffmpeg:"ffmpeg",
	Flv: Record{
		Path:          "record/flv",
		Ext:           ".flv",
		GetDurationFn: getFLVDuration,
	},
	Fmp4: Record{
		Path: "record/fmp4",
		Ext:  ".mp4",

	},
	Mp4: Record{
		Path: "record/mp4",
		Ext:  ".mp4",
	},
	Hls: Record{
		Path: "record/hls",
		Ext:  ".m3u8",
	},
	Raw: Record{
		Path: "record/raw",
		Ext:  ".", // 默认h264扩展名为.h264,h265扩展名为.h265
	},
	RawAudio: Record{
		Path: "record/raw",
		Ext:  ".", // 默认aac扩展名为.aac,pcma扩展名为.pcma,pcmu扩展名为.pcmu
	},
}

var plugin = InstallPlugin(RecordPluginConfig, defaultYaml)

func (conf *RecordConfig) OnEvent(event any) {
	switch v := event.(type) {
	case FirstConfig, config.Config:
		conf.Flv.Init()
		conf.Mp4.Init()
		conf.Fmp4.Init()
		conf.Hls.Init()
		conf.Raw.Init()
		conf.RawAudio.Init()
	case SEpublish:
		streamPath := v.Target.Path
		deviceId := v.Target.AppName
		if deviceId != "record"{
			// 获取的是录像，不录
			isRecord := getIsRecordByChannelId(strings.TrimSuffix(v.Target.StreamName, "/rtsp"))
			// 对steam path自动加上签名
			if EngineConfig.Subscribe.Key != ""{
				nowTime := time.Now().Unix()
				expireTime := nowTime + 315360000
				expireTime16 := strconv.FormatInt(expireTime, 16)
				m := md5.New()
				m.Write([]byte(EngineConfig.Subscribe.Key +streamPath + expireTime16))
				streamPathList := strings.Split(streamPath,"?")
				if len(streamPathList) > 0 {
					streamPath  = fmt.Sprintf("%s?%s=%s&%s=%s",streamPathList[0],EngineConfig.Subscribe.SecretArgName,hex.EncodeToString(m.Sum(nil)),EngineConfig.Subscribe.ExpireArgName,expireTime16)
				}
			}

			plugin.Info("是否需要开启录像",zap.String("streamPath",streamPath),zap.Int("是否录像",isRecord))
			//fmt.Println("发布流：",streamPath," 是否需要录像：",isRecord)
			if isRecord == 1 {
				if conf.Flv.NeedRecord(streamPath) {
					go NewFLVRecorder().Start(streamPath)
				}
				//fmt.Println("是否需要mp4录像:",conf.Mp4.NeedRecord(streamPath))
				if conf.Mp4.NeedRecord(streamPath) {
					go NewMP4Recorder().Start(streamPath)
				}
				if conf.Fmp4.NeedRecord(streamPath) {
					go NewFMP4Recorder().Start(streamPath)
				}
				if conf.Hls.NeedRecord(streamPath) {
					go NewHLSRecorder().Start(streamPath)
				}
				if conf.Raw.NeedRecord(streamPath) {
					go NewRawRecorder().Start(streamPath)
				}
				if conf.RawAudio.NeedRecord(streamPath) {
					go NewRawAudioRecorder().Start(streamPath)
				}
			}
		}

	}
}
func (conf *RecordConfig) getRecorderConfigByType(t string) (recorder *Record) {
	switch t {
	case "flv":
		recorder = &conf.Flv
	case "mp4":
		recorder = &conf.Mp4
	case "fmp4":
		recorder = &conf.Fmp4
	case "hls":
		recorder = &conf.Hls
	case "raw":
		recorder = &conf.Raw
	case "raw_audio":
		recorder = &conf.RawAudio
	}
	return
}

func getFLVDuration(file io.ReadSeeker) uint32 {
	_, err := file.Seek(-4, io.SeekEnd)
	if err == nil {
		var tagSize uint32
		if tagSize, err = util.ReadByteToUint32(file, true); err == nil {
			_, err = file.Seek(-int64(tagSize)-4, io.SeekEnd)
			if err == nil {
				_, timestamp, _, err := codec.ReadFLVTag(file)
				if err == nil {
					return timestamp
				}
			}
		}
	}
	return 0
}