package icsstt

import (
	"math"
	"sync"

	"batchmodule/icslog"
)

const RR_200MSEC_SIZE = 3200

type RRData struct {
	wPos       int
	wTPos      int
	wtSize     int
	rPos       int
	size       int // max size
	audio      []byte
	rtAudio    []byte //for GetAudio()
	rtAudioLen int
	m          *sync.Mutex
}

func NewRRData(size int) *RRData {
	if size <= 0 {
		return nil
	}
	rr := RRData{wPos: 0, rPos: 0, size: size, rtAudioLen: 0}
	rr.m = &sync.Mutex{}
	rr.audio = make([]byte, size)
	rr.rtAudio = make([]byte, size)

	return &rr
}

func (rr *RRData) AddAudio(data []byte) int {
	l := icslog.InitializeLogger()

	size := len(data)
	if size <= 0 || rr.audio == nil {
		return -1
	}

	rr.m.Lock()
	if rr.wPos == 0 && rr.wTPos != 0 {
		rr.wPos = rr.wtSize
	}

	if rr.wPos+size > rr.size {
		l.Printf("AddAudio> RRData write size exceeded!!! size: %d-%d", rr.size, rr.wPos+size)
		rr.wPos = rr.wtSize
		//l.Printf(icslog.LOG_LEVEL_DEBUG2, -1, "AddAudio> RRData write size exceeded. wPos reset. %d-%d-%d", rr.wPos, rr.size, rr.wPos+size)
	}

	//l.Printf(icslog.LOG_LEVEL_DEBUG2, -1, "AddAudio> wPos: %d, size: %d, total size: %d", rr.wPos, size, rr.size)

	copy(rr.audio[rr.wPos:], data[:])
	rr.wPos += size

	if rr.size <= rr.rtAudioLen {
		rr.rtAudio = append(rr.rtAudio, data...)
	} else {
		copy(rr.rtAudio[rr.rtAudioLen:], data)
	}
	rr.rtAudioLen += size

	rr.m.Unlock()

	return rr.wPos
}

func (rr *RRData) AddTempAudio(data []byte) int {
	//1sec temp buffer
	if rr.size < 40000 || rr.audio == nil {
		return -1
	}

	size := len(data)
	if size <= 0 {
		return -1
	}

	rr.m.Lock()

	//l := icslog.GetIcsLog()
	//l.Printf(icslog.LOG_LEVEL_DEBUG2, -1, "AddTempAudio> wtPos: %d, size: %d", rr.wTPos, size)

	if rr.wTPos+size > 40000 {
		//rr.wTPos = 0
		rr.wtSize = 40000
		rr.audio = rr.audio[size:]
		copy(rr.audio[rr.wTPos-size:], data[:])
	} else {
		rr.wtSize += size
		copy(rr.audio[rr.wTPos:], data[:])
		rr.wTPos += size
	}

	rr.m.Unlock()

	return rr.wTPos
}

func (rr *RRData) ReadAudio(size int) (int, []byte) {
	l := icslog.InitializeLogger()

	if rr.audio == nil {
		return -2, nil
	}

	rr.m.Lock()
	if int(math.Abs(float64(rr.wPos-rr.rPos))) < 1600 || int(math.Abs(float64(rr.wPos-rr.rPos))) < size {
		rr.m.Unlock()
		return 0, nil
	}
	rData := make([]byte, size)

	if rr.size < rr.rPos+size {
		rr.m.Unlock()
		l.Printf("ReadAudio> RRData read size exceeded!!! size: %d-%d", rr.size, rr.rPos+size)
		return -1, nil
		//rr.rPos = 0
	}

	//l.Printf(icslog.LOG_LEVEL_DEBUG2, -1, "ReadAudio> rPos: %d, size: %d, total size: %d", rr.rPos, size, rr.size)

	copy(rData[:], rr.audio[rr.rPos:rr.rPos+size])
	//fmt.Println("read audio data:", rr.rPos)
	rr.rPos += size

	rr.m.Unlock()

	return rr.rPos, rData
}

func (rr *RRData) Clear() {
	rr.m.Lock()
	rr.wPos = 0
	rr.rPos = 0
	rr.audio = nil
	rr.rtAudio = nil
	rr.m.Unlock()

	l := icslog.InitializeLogger()
	l.Print("Cleared RRData")
}

func (rr *RRData) GetAudio() []byte {
	if rr.audio == nil {
		return nil
	}

	rr.m.Lock()

	if rr.rtAudioLen <= 0 {
		rr.m.Unlock()
		return nil
	}
	//l.Printf(icslog.LOG_LEVEL_DEBUG2, -1, "GetAudio> audio length: %d", rr.rtAudioLen)

	var rData []byte
	if rr.wtSize > 0 {
		rData = make([]byte, rr.wtSize+rr.rtAudioLen)
		copy(rData, rr.audio[:rr.wtSize])
		copy(rData[rr.wtSize:], rr.rtAudio)
	} else {
		rData = make([]byte, rr.rtAudioLen)
		copy(rData, rr.rtAudio)
	}

	rr.m.Unlock()

	return rData
}

func (rr *RRData) Close() {
	rr.audio = nil
	rr.rtAudio = nil
	//rr = new(RRData)
}