package rtsp

import (
	"encoding/binary"
	"errors"
	"fmt"
	"log"
	"os"
	"strconv"
	"strings"
	"time"

	"git.insit.tech/psa/rtsp_reader-writer/writer/internal/config"
	"git.insit.tech/psa/rtsp_reader-writer/writer/internal/ingest/formats"
	logger "git.insit.tech/psa/rtsp_reader-writer/writer/internal/log"
	"git.insit.tech/psa/rtsp_reader-writer/writer/pkg/storage"
	log2 "git.insit.tech/sas/rtsp_proxy/core/log"
	"github.com/bluenviron/gortsplib/v4"
	"github.com/bluenviron/gortsplib/v4/pkg/base"
	"github.com/bluenviron/gortsplib/v4/pkg/description"
	"github.com/bluenviron/gortsplib/v4/pkg/format"
	"github.com/bluenviron/mediacommon/v2/pkg/codecs/g711"
	"github.com/pion/rtp"
	"go.uber.org/zap"
)

// StartWriter starts the program.
func StartWriter() {
	cams, err := config.ParseCamerasYAML()
	if err != nil {
		logger.Log.Fatal("func ParseCamerasYAML error:", zap.Error(err))
		log.Println("func ParseCamerasYAML error: ")
	}

	for _, link := range cams {
		logger.Log.Info("start process camera:", zap.String("link", link))
		log.Println("start process camera: ", link)

		go func() {
			err = rtsp(config.Local, 60, link, -1)
			if err != nil {
				logger.Log.Error("procRTSP function error for camera:", zap.String("link", link), zap.Error(err))
				log.Println("procRTSP function error for camera: ", link)
			}
		}()
	}
}

// rtsp processes RTSP protocol.
func rtsp(dir string, period int, link string, number int) error {
	// Create data folder in the directory.
	dirData := log2.DirCreator(dir, "data")

	// Create logger.
	cutURI := LastPartURI(link)
	cam := log2.CamLogging(fmt.Sprintf("%s/%s/writer-cam_%s.log", dirData, cutURI, time.Now().Format("15-04-05_02-01-2006")))

	// Connect to the server.
	c := gortsplib.Client{
		UserAgent: "PSA",
	}

	u, err := base.ParseURL(link)
	if err != nil {
		cam.Error("parse URL error:", zap.Error(err))
		return err
	}

	err = c.Start(u.Scheme, u.Host)
	if err != nil {
		cam.Error("connect to the server error:", zap.Error(err))
		return err
	}
	defer c.Close()

	desc, res, err := c.Describe(u)
	if err != nil || desc == nil {
		cam.Error("medias not found for camera:", zap.Error(err))
		log.Println("medias not found for camera: ", cutURI)
		changeDomain(dir, period, link, number+1, cam, err)
		return nil
	}

	// Create file name structure and directory for files.
	resolution := findResolution(res.Body)
	resolutions := []string{resolution}

	fn := storage.CreateFileName(dirData, resolutions, cutURI, period, number)

	err = os.MkdirAll(fmt.Sprintf("%s", fn.Path), 0755)
	if err != nil {
		cam.Error("mkdirall error: %w", zap.Error(err))
		return err
	}

	// Find formats.
	var audioFormat string
	var videoFormat string

	av1Format, av1Media, err := formats.FindAV1Format(desc)
	if av1Format != nil {
		videoFormat = "AV1"
		cam.Info("AV1 format found")
	}
	if err != nil {
		cam.Info("func FindAV1Format:", zap.Error(err))
	}

	g711Format, g711Media, err := formats.FindG711Format(desc)
	if g711Format != nil {
		audioFormat = "G711"
		cam.Info("G711 format found")
	}
	if err != nil {
		cam.Info("func FindG711Format:", zap.Error(err))
	}

	h264Format, h264Media, err := formats.FindH264Format(desc)
	if h264Format != nil {
		videoFormat = "H264"
		cam.Info("H264 format found")
	}
	if err != nil {
		cam.Info("func FindH264Format:", zap.Error(err))
	}

	aacFormat, aacMedia, err := formats.FindAACFormat(desc)
	if aacFormat != nil {
		audioFormat = "AAC"
		cam.Info("AAC format found")
	}
	if err != nil {
		cam.Info("func FindAACFormat:", zap.Error(err))
	}

	h265Format, h265Media, err := formats.FindH265Format(desc)
	if h265Format != nil {
		videoFormat = "H265"
		cam.Info("H265 format found")
	}
	if err != nil {
		cam.Info("func FindH265Format:", zap.Error(err))
	}

	lpcmFormat, lpcmMedia, err := formats.FindLPCMFormat(desc)
	if lpcmFormat != nil {
		audioFormat = "LPCM"
		cam.Info("LPCM format found")
	}
	if err != nil {
		cam.Info("func FindLPCMFormat:", zap.Error(err))
	}

	mjpegFormat, mjpegMedia, err := formats.FindMJPEGFormat(desc)
	if mjpegFormat != nil {
		videoFormat = "MJPEG"
		cam.Info("MJPEG format found")
	}
	if err != nil {
		cam.Info("func FindLPCMFormat:", zap.Error(err))
	}

	opusFormat, opusMedia, err := formats.FindOPUSFormat(desc)
	if opusFormat != nil {
		audioFormat = "OPUS"
		cam.Info("OPUS format found")
	}
	if err != nil {
		cam.Info("func FindOPUSFormat:", zap.Error(err))
	}

	vp8Format, vp8Media, err := formats.FindVP8Format(desc)
	if vp8Format != nil {
		videoFormat = "VP8"
		cam.Info("VP8 format found")
	}
	if err != nil {
		cam.Info("func FindVP8Format:", zap.Error(err))
	}

	vp9Format, vp9Media, err := formats.FindVP9Format(desc)
	if vp9Format != nil {
		videoFormat = "VP9"
		cam.Info("VP9 format found")
	}
	if err != nil {
		cam.Info("func FindVP9Format:", zap.Error(err))
	}

	// Start program according to gotten formats.
	switch {
	case videoFormat == "AV1" && audioFormat == "":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		av1RTPDec, err := av1Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		av1Dec := &formats.AV1Decoder{}
		err = av1Dec.Initialize()
		if err != nil {
			cam.Error("init decoder error:", zap.Error(err))
			return err
		}
		defer av1Dec.Close()

		// Setup media.
		_, err = c.Setup(desc.BaseURL, av1Media, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		firstRandomReceived := false

		// Process input rtp packets.
		c.OnPacketRTP(av1Media, av1Format, func(pkt *rtp.Packet) {
			// Process AV1 flow and return PTS and IMG.
			pts, _, err := formats.ProcessAV1(&c, av1Media, av1RTPDec, pkt, av1Dec, firstRandomReceived)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("decoded image:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "" && audioFormat == "G711":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		g711RTPDec, err := g711Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup media.
		_, err = c.Setup(desc.BaseURL, g711Media, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTP(g711Media, g711Format, func(pkt *rtp.Packet) {
			// Process G711 flow and return PTS and AU.
			pts, au, err := formats.ProcessG711(&c, g711Media, g711RTPDec, pkt)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			// Decode samples (these are 16-bit, big endian LPCM samples).
			if g711Format.MULaw {
				g711.DecodeMulaw(au)
			} else {
				g711.DecodeAlaw(au)
			}

			cam.Info("decoded audio samples:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()
		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "H264" && audioFormat == "AAC":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoders.
		//h264RTPDec, err := h264Format.CreateDecoder()
		//if err != nil {
		//	cam.Error("create decoder error:", zap.Error(err))
		//}
		//
		//aacRTPDec, err := aacFormat.CreateDecoder()
		//if err != nil {
		//	cam.Error("create decoder error:", zap.Error(err))
		//}

		//// Setup MPEG-TS muxer.
		//currentMpegtsMuxer := formats.MpegtsMuxer{
		//	FileName:         fn.SetNumNTime(),
		//	H264Format:       h264Format,
		//	Mpeg4AudioFormat: aacFormat,
		//}

		//err = currentMpegtsMuxer.Initialize()
		//if err != nil {
		//	return fmt.Errorf("[%v-%v]: init muxer error: %w\n", videoFormat, audioFormat, err)
		//}

		// Setup all medias.
		err = c.SetupAll(desc.BaseURL, desc.Medias)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTPAny(func(medi *description.Media, forma format.Format, pkt *rtp.Packet) {
			switch forma.(type) {
			case *format.H264:
				//// Process H264 flow and return PTS and AU.
				//pts, au, err := formats.ProcessH264(&c, h264Media, h264RTPDec, pkt, videoFormat)
				//if err != nil {
				//	cam.Warn("process packet error:", zap.Error(err))
				//}
				//
				//// Encode the access unit into MPEG-TS.
				//err = currentMpegtsMuxer.WriteH264(pts, au)
				//if err != nil {
				//	return
				//}

			case *format.MPEG4Audio:
				//// Process AAC flow and return PTS and AUS.
				//pts, aus, err := formats.ProcessAAC(&c, aacMedia, aacRTPDec, pkt, audioFormat)
				//if err != nil {
				//	cam.Warn("process packet error:", zap.Error(err))
				//}
				//
				//// Encode access units into MPEG-TS.
				//err = currentMpegtsMuxer.WriteAAC(aus, pts)
				//if err != nil {
				//	return
				//}

			}
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				//// Logic for rotation files.
				//currentMpegtsMuxer.Close()
				//currentMpegtsMuxer.FileName = fn.SetNumNTime()
				//
				//err = currentMpegtsMuxer.Initialize()
				//if err != nil {
				//	log.Printf("[%v-%v]: init muxer error: %v\n", videoFormat, audioFormat, err)
				//	return
				//}
				//
				// cam.Info("new file for recording created")
				// log.Println("new file for recording created")
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "H264" && audioFormat == "G711" || videoFormat == "H264" && audioFormat == "":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoders.
		h264RTPDec, err := h264Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		g711RTPDec, err := g711Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		//// Setup MPEG-TS muxer.
		//var aacFormat *format.MPEG4Audio
		//
		//currentMpegtsMuxer := formats.MpegtsMuxer{
		//	FileName:         fn.SetNumNTime(),
		//	H264Format:       h264Format,
		//	Mpeg4AudioFormat: aacFormat,
		//}

		//err = currentMpegtsMuxer.Initialize()
		//if err != nil {
		//	return fmt.Errorf("[%v-%v]: init muxer error: %w\n", videoFormat, audioFormat, err)
		//}

		// Setup all medias.
		err = c.SetupAll(desc.BaseURL, desc.Medias)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		file, err := os.Create(fn.SetNumNTime("insit"))
		if err != nil {
			cam.Error("creating file error:", zap.Error(err))
			return err
		}
		defer file.Close()

		seg := storage.Segment{
			Date:     time.Now().Format("15-04-05_02-01-2006"),
			Duration: strconv.Itoa(period),
			Packet:   storage.InterleavedPacket{},
		}

		// Write StreamID.
		if err := binary.Write(file, binary.LittleEndian, int32(len(cutURI))); err != nil {
			cam.Error("write StreamID length error:", zap.Error(err))
			return err
		}
		if _, err := file.Write([]byte(cutURI)); err != nil {
			cam.Error("write StreamID error:", zap.Error(err))
			return err
		}

		// Write header of the file.
		err = storage.WriteHeader(file, seg)
		if err != nil {
			cam.Error("write header error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTPAny(func(medi *description.Media, forma format.Format, pkt *rtp.Packet) {
			switch f := forma.(type) {
			case *format.H264:
				// Process H264 flow and return PTS and AU.
				pts, au, err := formats.ProcessH264(&c, h264Media, h264RTPDec, pkt)
				if err != nil {
					cam.Warn("process packet error:", zap.Error(err))
				}

				if au != nil {
					// Add appropriate lines to the interleaved packet.
					seg.Packet.Type = storage.PacketTypeH264
					seg.Packet.Pts = pts
					seg.Packet.H264AUs = au

					// Write segment with interleaved packets.
					if err := storage.WriteInterleavedPacket(file, seg); err != nil {
						cam.Error("write segment error:", zap.Error(err))
						return
					}
				}

				//// Encode the access unit into MPEG-TS.
				//err = currentMpegtsMuxer.WriteH264(pts, au)
				//if err != nil {
				//	return
				//}

			case *format.G711:
				// Process G711 flow and returns PTS and AU.
				pts, au, err := formats.ProcessG711(&c, g711Media, g711RTPDec, pkt)
				if err != nil {
					cam.Warn("process packet error:", zap.Error(err))
				}

				if au != nil {
					// Convert G711 to LPCM.
					lpcmSamples := formats.ConvertG711ToLPCM(au, f.MULaw)

					// Add appropriate lines to the interleaved packet.
					seg.Packet.Type = storage.PacketTypeLPCM
					seg.Packet.Pts = pts
					seg.Packet.LPCMSamples = lpcmSamples

					// Write segment with interleaved packets.
					if err := storage.WriteInterleavedPacket(file, seg); err != nil {
						cam.Error("write segment error:", zap.Error(err))
						return
					}
				}

				//// Convert G711 to AAC.
				//au, err = formats.ConvertLPCMToAAC(lpcmSamples)
				//if err != nil {
				//	log.Printf("[%v-%v]: converting to AAC frame error: %v\n", videoFormat, audioFormat, err)
				//}
				//
				//// Encode the access unit into MPEG-TS.
				//err = currentMpegtsMuxer.WriteAAC([][]byte{au}, pts)
				//if err != nil {
				//	return
			}

		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				/*
					// Logic for rotation files.
					currentMpegtsMuxer.Close()
					currentMpegtsMuxer.FileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.Initialize()
					if err != nil {
						log.Printf("[%v-%v]: init muxer error: %v\n", videoFormat, audioFormat, err)
						return
					}
				*/

				file.Close()

				file, err = os.Create(fn.SetNumNTime("insit"))
				if err != nil {
					cam.Error("creating file error:", zap.Error(err))
					logger.Log.Error("creating file error:", zap.Error(err))
					return
				}

				seg = storage.Segment{
					Date:     time.Now().Format("15-04-05_02-01-2006"),
					Duration: strconv.Itoa(period),
					Packet:   storage.InterleavedPacket{},
				}

				// Write StreamID.
				if err := binary.Write(file, binary.LittleEndian, int32(len(cutURI))); err != nil {
					cam.Error("write StreamID length error:", zap.Error(err))
					logger.Log.Error("write StreamID length error:", zap.Error(err))
					return
				}
				if _, err := file.Write([]byte(cutURI)); err != nil {
					cam.Error("write StreamID error:", zap.Error(err))
					logger.Log.Error("write StreamID error:", zap.Error(err))
					return
				}

				// Write header of the file.
				err = storage.WriteHeader(file, seg)
				if err != nil {
					cam.Error("write header error:", zap.Error(err))
					logger.Log.Error("write header error:", zap.Error(err))
					return
				}

				cam.Info("new file for recording created")
				log.Println("new file for recording created")
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "H264-" && audioFormat == "":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		h264RTPDec, err := h264Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup H264 -> RGBA decoder.
		h264Dec := &formats.H264Decoder{}
		err = h264Dec.Initialize()
		if err != nil {
			cam.Error("init decoder error:", zap.Error(err))
			return err
		}
		defer h264Dec.Close()

		// if SPS and PPS are present into the SDP, send them to the decoder
		if h264Format.SPS != nil {
			h264Dec.Decode([][]byte{h264Format.SPS})
		}
		if h264Format.PPS != nil {
			h264Dec.Decode([][]byte{h264Format.PPS})
		}

		// Setup media.
		_, err = c.Setup(desc.BaseURL, h264Media, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		firstRandomAccess := false

		// Process input rtp packets.
		c.OnPacketRTP(h264Media, h264Format, func(pkt *rtp.Packet) {
			// Process H264 flow and return PTS and IMG.
			pts, _, err := formats.ProcessH264RGBA(
				&c, h264Media, h264RTPDec, h264Dec, pkt, firstRandomAccess)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("decoded image:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "H265" && audioFormat == "":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		h265RTPDec, err := h265Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup H264 -> RGBA decoder.
		h265Dec := &formats.H265Decoder{}
		err = h265Dec.Initialize()
		if err != nil {
			cam.Error("init decoder error:", zap.Error(err))
			return err
		}
		defer h265Dec.Close()

		// If VPS, SPS and PPS are present into the SDP, send them to the decoder.
		if h265Format.VPS != nil {
			h265Dec.Decode([][]byte{h265Format.VPS})
		}
		if h265Format.SPS != nil {
			h265Dec.Decode([][]byte{h265Format.SPS})
		}
		if h265Format.PPS != nil {
			h265Dec.Decode([][]byte{h265Format.PPS})
		}

		// Setup media.
		_, err = c.Setup(desc.BaseURL, h265Media, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		firstRandomAccess := false

		// Process input rtp packets.
		c.OnPacketRTP(h265Media, h265Format, func(pkt *rtp.Packet) {
			// Process H265 flow and return PTS and IMG.
			pts, _, err := formats.ProcessH265RGBA(&c, h265Media, h265RTPDec, h265Dec, pkt, firstRandomAccess)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("decoded image:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "" && audioFormat == "LPCM":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		lpcmRTPDec, err := lpcmFormat.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup media.
		_, err = c.Setup(desc.BaseURL, lpcmMedia, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTP(lpcmMedia, lpcmFormat, func(pkt *rtp.Packet) {
			// Process LPCM flow and return PTS and SAMPLES.
			pts, _, err := formats.ProcessLPCM(&c, lpcmMedia, lpcmRTPDec, pkt)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("decoded audio samples:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "MJPEG" && audioFormat == "":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		mjpegRTPDec, err := mjpegFormat.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup media.
		_, err = c.Setup(desc.BaseURL, mjpegMedia, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTP(mjpegMedia, mjpegFormat, func(pkt *rtp.Packet) {
			// Process MJPEG flow and return PTS and IMG.
			pts, _, err := formats.ProcessMJPEGRGBA(&c, mjpegMedia, mjpegRTPDec, pkt)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("decoded image:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "" && audioFormat == "AAC":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		aacRTPDec, err := aacFormat.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup media.
		_, err = c.Setup(desc.BaseURL, aacMedia, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTP(aacMedia, aacFormat, func(pkt *rtp.Packet) {
			// Process AAC flow and return PTS and AUS.
			pts, aus, err := formats.ProcessAAC(&c, aacMedia, aacRTPDec, pkt)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			for _, _ = range aus {
				cam.Info("received access unit:", zap.String("PTS", strconv.FormatInt(pts, 10)))
			}
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "" && audioFormat == "OPUS":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		opusRTPDec, err := opusFormat.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup media.
		_, err = c.Setup(desc.BaseURL, opusMedia, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTP(opusMedia, opusFormat, func(pkt *rtp.Packet) {
			// Process OPUS flow and return PTS and OP.
			pts, _, err := formats.ProcessOPUS(&c, opusMedia, opusRTPDec, pkt)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("received OPUS packet:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "VP8" && audioFormat == "":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		vp8RTPDec, err := vp8Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup VP8 -> RGBA decoder.
		vp8Dec := &formats.VPDecoder{}
		err = vp8Dec.Initialize()
		if err != nil {
			cam.Error("init decoder error:", zap.Error(err))
			return err
		}
		defer vp8Dec.Close()

		// Setup media.
		_, err = c.Setup(desc.BaseURL, vp8Media, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTP(vp8Media, vp8Format, func(pkt *rtp.Packet) {
			// Process VP8 flow and return PTS and IMG.
			pts, _, err := formats.ProcessVP8RGBA(&c, vp8Media, vp8RTPDec, vp8Dec, pkt)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("decoded image:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	case videoFormat == "VP9" && audioFormat == "":
		// Wait for the next period.
		waitPeriod(period, cam)
		cam.Info("start recording")

		// Create decoder.
		vp9RTPDec, err := vp9Format.CreateDecoder()
		if err != nil {
			cam.Error("create decoder error:", zap.Error(err))
			return err
		}

		// Setup VP9 -> RGBA decoder.
		vp9Dec := &formats.VPDecoder{}
		err = vp9Dec.Initialize()
		if err != nil {
			cam.Error("init decoder error:", zap.Error(err))
			return err
		}
		defer vp9Dec.Close()

		// Setup media.
		_, err = c.Setup(desc.BaseURL, vp9Media, 0, 0)
		if err != nil {
			cam.Error("setup media error:", zap.Error(err))
			return err
		}

		// Process input rtp packets.
		c.OnPacketRTP(vp9Media, vp9Format, func(pkt *rtp.Packet) {
			// Process VP9 flow and return PTS and IMG.
			pts, _, err := formats.ProcessVP9RGBA(&c, vp9Media, vp9RTPDec, vp9Dec, pkt)
			if err != nil {
				cam.Warn("process packet error:", zap.Error(err))
			}

			cam.Info("decoded image:", zap.String("PTS", strconv.FormatInt(pts, 10)))
		})

		// Start playing.
		_, err = c.Play(nil)
		if err != nil {
			cam.Error("sending PLAY request error:", zap.Error(err))
			return err
		}

		// Set program if the client gets request.
		c.OnRequest = func(req *base.Request) {
			switch req.Method {
			case base.Teardown:
				cam.Warn("got TEARDOWN request from server:", zap.String("request", req.String()))
			case base.Method(rune(base.StatusRequestTimeout)):
				cam.Warn("got STATUS_REQUEST_TIMEOUT from server:", zap.String("request", req.String()))
			case base.GetParameter:
				cam.Info("got Get_Parameter from server:", zap.String("request", req.String()))
			case "TCP timeout":
				cam.Warn("got TCP timeout from server:", zap.String("request", req.String()))
			case "EOF":
				cam.Warn("got EOF from server:", zap.String("request", req.String()))
			default:
				cam.Warn("got method from server:", zap.String("request", req.String()))
			}
		}

		// Create ticker for rotation files.
		ticker := time.NewTicker(time.Duration(period) * time.Second)
		defer ticker.Stop()

		// Rotate files.
		go func() {
			for range ticker.C {
				// Logic for rotation files.
				/*
					currentMpegtsMuxer.close()
					currentMpegtsMuxer.fileName = fn.SetNumNTime()

					err = currentMpegtsMuxer.initialize()
					if err != nil {
						panic(err)
					}

					cam.Info("new file for recording created")
					log.Println("new file for recording created")
				*/
			}
		}()

		if err = c.Wait(); err != nil {
			rtsp(dir, period, link, fn.Number+1)
			cam.Error("c.Wait() error:", zap.Error(c.Wait()))
		}

	}
	return nil
}

// changeDomain changes domain if a camera was flipped to another domain.
func changeDomain(dir string, period int, link string, number int, cam *zap.Logger, err error) {
	err2 := errors.New("404 (Not found)")
	if errors.As(err, &err2) {
		if strings.Contains(link, "video-1") {
			err = rtsp(dir, period, strings.Replace(link, "video-1", "video-2", 1), number)
			if err != nil {
				cam.Error("changeDomain rtsp error:", zap.Error(err))
				logger.Log.Error("changeDomain rtsp error:", zap.Error(err))
				log.Println("changeDomain rtsp error for camera: ", link)
				return
			}
		} else {
			err = rtsp(dir, period, strings.Replace(link, "video-2", "video-1", 1), number)
			if err != nil {
				cam.Error("changeDomain rtsp error:", zap.Error(err))
				logger.Log.Error("changeDomain rtsp error:", zap.Error(err))
				log.Println("changeDomain rtsp error for camera: ", link)
				return
			}
		}
	}
}