package main

import (
	"time"

	"github.com/deepch/vdk/av"
	"github.com/imdario/mergo"
	"github.com/sirupsen/logrus"
)

// StreamChannelMake check stream exist
func (obj *StorageST) StreamChannelMake(val ChannelST) ChannelST {
	channel := obj.ChannelDefaults
	if err := mergo.Merge(&channel, val); err != nil {
		// Just ignore the default values and continue
		channel = val
		log.WithFields(logrus.Fields{
			"module": "storage",
			"func":   "StreamChannelMake",
			"call":   "mergo.Merge",
		}).Errorln(err.Error())
	}
	//make client's
	channel.clients = make(map[string]ClientST)
	//make last ack
	channel.ack = time.Now().Add(-255 * time.Hour)
	//make hls buffer
	channel.hlsSegmentBuffer = make(map[int]SegmentOld)
	//make signals buffer chain
	channel.signals = make(chan int, 100)
	return channel
}

// StreamChannelRunAll run all stream go
func (obj *StorageST) StreamChannelRunAll() {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	for k, v := range obj.Streams {
		for ks, vs := range v.Channels {
			if !vs.OnDemand {
				vs.runLock = true
				go StreamServerRunStreamDo(k, ks)
				v.Channels[ks] = vs
				obj.Streams[k] = v
			}
		}
	}
}

// StreamChannelRun one stream and lock
func (obj *StorageST) StreamChannelRun(streamID string, channelID string) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if streamTmp, ok := obj.Streams[streamID]; ok {
		if channelTmp, ok := streamTmp.Channels[channelID]; ok {
			if !channelTmp.runLock {
				channelTmp.runLock = true
				streamTmp.Channels[channelID] = channelTmp
				obj.Streams[streamID] = streamTmp
				go StreamServerRunStreamDo(streamID, channelID)
			}
		}
	}
}

// StreamChannelUnlock unlock status to no lock
func (obj *StorageST) StreamChannelUnlock(streamID string, channelID string) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if streamTmp, ok := obj.Streams[streamID]; ok {
		if channelTmp, ok := streamTmp.Channels[channelID]; ok {
			channelTmp.runLock = false
			streamTmp.Channels[channelID] = channelTmp
			obj.Streams[streamID] = streamTmp
		}
	}
}

// StreamChannelControl get stream
func (obj *StorageST) StreamChannelControl(key string, channelID string) (*ChannelST, error) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if streamTmp, ok := obj.Streams[key]; ok {
		if channelTmp, ok := streamTmp.Channels[channelID]; ok {
			return &channelTmp, nil
		}
	}
	return nil, ErrorStreamNotFound
}

// StreamChannelExist check stream exist
func (obj *StorageST) StreamChannelExist(streamID string, channelID string) bool {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if streamTmp, ok := obj.Streams[streamID]; ok {
		if channelTmp, ok := streamTmp.Channels[channelID]; ok {
			channelTmp.ack = time.Now()
			streamTmp.Channels[channelID] = channelTmp
			obj.Streams[streamID] = streamTmp
			return ok
		}
	}
	return false
}

// StreamChannelReload reload stream
func (obj *StorageST) StreamChannelReload(uuid string, channelID string) error {
	obj.mutex.RLock()
	defer obj.mutex.RUnlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			channelTmp.signals <- SignalStreamRestart
			return nil
		}
	}
	return ErrorStreamNotFound
}

// StreamInfo return stream info
func (obj *StorageST) StreamChannelInfo(uuid string, channelID string) (*ChannelST, error) {
	obj.mutex.RLock()
	defer obj.mutex.RUnlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			return &channelTmp, nil
		}
	}
	return nil, ErrorStreamNotFound
}

// StreamChannelCodecs get stream codec storage or wait
func (obj *StorageST) StreamChannelCodecs(streamID string, channelID string) ([]av.CodecData, error) {
	for i := 0; i < 100; i++ {
		ret, err := (func() ([]av.CodecData, error) {
			obj.mutex.RLock()
			defer obj.mutex.RUnlock()
			tmp, ok := obj.Streams[streamID]
			if !ok {
				return nil, ErrorStreamNotFound
			}
			channelTmp, ok := tmp.Channels[channelID]
			if !ok {
				return nil, ErrorStreamChannelNotFound
			}
			return channelTmp.codecs, nil
		})()

		if ret != nil || err != nil {
			return ret, err
		}

		time.Sleep(50 * time.Millisecond)
	}
	return nil, ErrorStreamChannelCodecNotFound
}

// StreamChannelStatus change stream status
func (obj *StorageST) StreamChannelStatus(key string, channelID string, val int) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[key]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			channelTmp.Status = val
			tmp.Channels[channelID] = channelTmp
			obj.Streams[key] = tmp
		}
	}
}

// StreamChannelCast broadcast stream
func (obj *StorageST) StreamChannelCast(key string, channelID string, val *av.Packet) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[key]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			if len(channelTmp.clients) > 0 {
				for _, i2 := range channelTmp.clients {
					if i2.mode == RTSP {
						continue
					}
					if len(i2.outgoingAVPacket) < 1000 {
						i2.outgoingAVPacket <- val
					} else if len(i2.signals) < 10 {
						i2.signals <- SignalStreamStop
					}
				}
				channelTmp.ack = time.Now()
				tmp.Channels[channelID] = channelTmp
				obj.Streams[key] = tmp
			}
		}
	}
}

// StreamChannelCastProxy broadcast stream
func (obj *StorageST) StreamChannelCastProxy(key string, channelID string, val *[]byte) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[key]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			if len(channelTmp.clients) > 0 {
				for _, i2 := range channelTmp.clients {
					if i2.mode != RTSP {
						continue
					}
					if len(i2.outgoingRTPPacket) < 1000 {
						i2.outgoingRTPPacket <- val
					} else if len(i2.signals) < 10 {
						i2.signals <- SignalStreamStop
					}
				}
				channelTmp.ack = time.Now()
				tmp.Channels[channelID] = channelTmp
				obj.Streams[key] = tmp
			}
		}
	}
}

// StreamChannelCodecsUpdate update stream codec storage
func (obj *StorageST) StreamChannelCodecsUpdate(streamID string, channelID string, val []av.CodecData, sdp []byte) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[streamID]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			channelTmp.codecs = val
			channelTmp.sdp = sdp
			tmp.Channels[channelID] = channelTmp
			obj.Streams[streamID] = tmp
		}
	}
}

// StreamChannelSDP codec storage or wait
func (obj *StorageST) StreamChannelSDP(streamID string, channelID string) ([]byte, error) {
	for i := 0; i < 100; i++ {
		obj.mutex.RLock()
		tmp, ok := obj.Streams[streamID]
		obj.mutex.RUnlock()
		if !ok {
			return nil, ErrorStreamNotFound
		}
		channelTmp, ok := tmp.Channels[channelID]
		if !ok {
			return nil, ErrorStreamChannelNotFound
		}

		if len(channelTmp.sdp) > 0 {
			return channelTmp.sdp, nil
		}
		time.Sleep(50 * time.Millisecond)
	}
	return nil, ErrorStreamNotFound
}

// StreamChannelAdd add stream
func (obj *StorageST) StreamChannelAdd(uuid string, channelID string, val ChannelST) error {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if _, ok := obj.Streams[uuid]; !ok {
		return ErrorStreamNotFound
	}
	if _, ok := obj.Streams[uuid].Channels[channelID]; ok {
		return ErrorStreamChannelAlreadyExists
	}
	val = obj.StreamChannelMake(val)
	obj.Streams[uuid].Channels[channelID] = val
	if !val.OnDemand {
		val.runLock = true
		go StreamServerRunStreamDo(uuid, channelID)
	}
	err := obj.SaveConfig()
	if err != nil {
		return err
	}
	return nil
}

// StreamEdit edit stream
func (obj *StorageST) StreamChannelEdit(uuid string, channelID string, val ChannelST) error {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if currentChannel, ok := tmp.Channels[channelID]; ok {
			if currentChannel.runLock {
				currentChannel.signals <- SignalStreamStop
			}
			val = obj.StreamChannelMake(val)
			obj.Streams[uuid].Channels[channelID] = val
			if !val.OnDemand {
				val.runLock = true
				go StreamServerRunStreamDo(uuid, channelID)
			}
			err := obj.SaveConfig()
			if err != nil {
				return err
			}
			return nil
		}
	}
	return ErrorStreamNotFound
}

// StreamChannelDelete stream
func (obj *StorageST) StreamChannelDelete(uuid string, channelID string) error {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			if channelTmp.runLock {
				channelTmp.signals <- SignalStreamStop
			}
			delete(obj.Streams[uuid].Channels, channelID)
			err := obj.SaveConfig()
			if err != nil {
				return err
			}
			return nil
		}
	}
	return ErrorStreamNotFound
}

// NewHLSMuxer new muxer init
func (obj *StorageST) NewHLSMuxer(uuid string, channelID string) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			channelTmp.hlsMuxer = NewHLSMuxer(uuid)
			tmp.Channels[channelID] = channelTmp
			obj.Streams[uuid] = tmp
		}
	}
}

// HlsMuxerSetFPS write packet
func (obj *StorageST) HlsMuxerSetFPS(uuid string, channelID string, fps int) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok && channelTmp.hlsMuxer != nil {
			channelTmp.hlsMuxer.SetFPS(fps)
			tmp.Channels[channelID] = channelTmp
			obj.Streams[uuid] = tmp
		}
	}
}

// HlsMuxerWritePacket write packet
func (obj *StorageST) HlsMuxerWritePacket(uuid string, channelID string, packet *av.Packet) {
	obj.mutex.RLock()
	defer obj.mutex.RUnlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok && channelTmp.hlsMuxer != nil {
			channelTmp.hlsMuxer.WritePacket(packet)
		}
	}
}

// HLSMuxerClose close muxer
func (obj *StorageST) HLSMuxerClose(uuid string, channelID string) {
	obj.mutex.RLock()
	defer obj.mutex.RUnlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			channelTmp.hlsMuxer.Close()
		}
	}
}

// HLSMuxerM3U8 get m3u8 list
func (obj *StorageST) HLSMuxerM3U8(uuid string, channelID string, msn, part int) (string, error) {
	obj.mutex.Lock()
	tmp, ok := obj.Streams[uuid]
	obj.mutex.Unlock()
	if ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			index, err := channelTmp.hlsMuxer.GetIndexM3u8(msn, part)
			return index, err
		}
	}
	return "", ErrorStreamNotFound
}

// HLSMuxerSegment get segment
func (obj *StorageST) HLSMuxerSegment(uuid string, channelID string, segment int) ([]*av.Packet, error) {
	obj.mutex.Lock()
	defer obj.mutex.Unlock()
	if tmp, ok := obj.Streams[uuid]; ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			return channelTmp.hlsMuxer.GetSegment(segment)
		}
	}
	return nil, ErrorStreamChannelNotFound
}

// HLSMuxerFragment get fragment
func (obj *StorageST) HLSMuxerFragment(uuid string, channelID string, segment, fragment int) ([]*av.Packet, error) {
	obj.mutex.Lock()
	tmp, ok := obj.Streams[uuid]
	obj.mutex.Unlock()
	if ok {
		if channelTmp, ok := tmp.Channels[channelID]; ok {
			packet, err := channelTmp.hlsMuxer.GetFragment(segment, fragment)
			return packet, err
		}
	}
	return nil, ErrorStreamChannelNotFound
}