// Copyright 2019  github.com. All rights reserved.
// Use of this source code is governed by  github.com.
package v1

import (
	"errors"
	"fmt"
	"github.com/jaryhe/gopkgs/cache"
	"strconv"
	"strings"
	"lift-monitor/timetask"
)

var MbTable = []uint16{
	0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
	0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
	0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
	0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
	0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
	0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
	0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
	0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
	0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
	0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
	0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
	0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
	0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
	0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
	0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
	0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
	0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
	0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
	0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
	0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
	0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
	0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
	0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
	0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
	0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
	0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
	0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
	0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
	0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
	0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
	0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
	0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040}

func CheckSum(data []byte) uint16 {
	var crc16 uint16
	crc16 = 0xffff
	for _, v := range data {
		n := uint8(uint16(v) ^ crc16)
		crc16 >>= 8
		crc16 ^= MbTable[n]
	}
	return crc16
}

var crc8_tab = []byte{
	0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15, 0x38, 0x3f, 0x36, 0x31, 0x24, 0x23,
	0x2a, 0x2d,
	0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65, 0x48, 0x4f, 0x46, 0x41, 0x54, 0x53,
	0x5a, 0x5d,
	0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5, 0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3,
	0xca, 0xcd,
	0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85, 0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3,
	0xba, 0xbd,
	0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2, 0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4,
	0xed, 0xea,
	0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2, 0x8f, 0x88, 0x81, 0x86, 0x93, 0x94,
	0x9d, 0x9a,
	0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32, 0x1f, 0x18, 0x11, 0x16, 0x03, 0x04,
	0x0d, 0x0a,
	0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42, 0x6f, 0x68, 0x61, 0x66, 0x73, 0x74,
	0x7d, 0x7a,
	0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c, 0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa,
	0xa3, 0xa4,
	0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec, 0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda,
	0xd3, 0xd4,
	0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c, 0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a,
	0x43, 0x44,
	0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c, 0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a,
	0x33, 0x34,
	0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b, 0x76, 0x71, 0x78, 0x7f, 0x6a, 0x6d,
	0x64, 0x63,
	0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b, 0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d,
	0x14, 0x13,
	0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb, 0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8d,
	0x84, 0x83,
	0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb, 0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd,
	0xf4, 0xf3,
}

func Crc8(buf []byte) byte {
	var crc byte
	crc = 0
	var index = 0
	for ; index < len(buf); index++ {
		tempByte := buf[index]
		crc = crc8_tab[(crc^tempByte)&0xff] & 0xff
	}
	return crc
}

func LiftParseMqtt(src []byte) (result []byte, completed bool) {
	length := len(src)
	if length < 44 {
		return nil, false
	}

	if src[0] != 0xA5 || src[1] != 0x5A {
		return nil, false
	}
	if src[length-4] != 0xcc || src[length-3] != 0x33 || src[length-2] != 0xc3 || src[length-1] != 0x3c {
		return nil, false
	}
	return src, true
}

func LiftParseUdp(src []byte) (result []byte, left []byte, completed bool, err error) {
	hexPrintf(src)
	length := len(src)
	if length < 44 {
		return nil, src, false, nil
	}

	if src[0] != 0xA5 || src[1] != 0x5A {
		return nil, nil, false, errors.New("data error1")
	}

	infoLength := int(src[37])<<8 + int(src[38])
	if length < infoLength+44 {
		return nil, src, false, nil
	}
	if infoLength > 1024 {
		return nil, nil, false, errors.New("data too long")
	}
	if src[infoLength+40] != 0xcc ||
		src[infoLength+41] != 0x33 ||
		src[infoLength+42] != 0xc3 ||
		src[infoLength+43] != 0x3c {
		return nil, nil, false, errors.New("data error2")
	}

	return src[:infoLength+44], src[infoLength+44:], true, nil

}

func hexPrintf(data []byte) {
	fmt.Printf("lenght:%d\n", len(data))
	for _, v := range data {
		fmt.Printf("0x%02x,", v)
	}
	fmt.Printf("\n")
}

func LiftParseTcp(src []byte) (result []byte, left []byte, completed bool, err error) {
	return LiftParseUdp(src)
}

func parseFloat(data string) float64 {
	if data == "" {
		return 0
	}
	ret, _ := strconv.ParseFloat(data, 64)
	return ret
}

const (
	// 身份认证请求
	LiftFrameAuthRequest  = 0x00
	LiftFrameAuthResponse = 0x01

	// 基本属性信息
	LiftFrameBaseInfoRequest  = 0x02
	LiftFrameBaseInfoResponse = 0x03

	// 传感器标定信息
	LiftFrameSensorConfRequest  = 0x04
	LiftFrameSensorConfResponse = 0x05

	// 报警设置信息
	LiftFrameAlarmConfRequest  = 0x06
	LiftFrameAlarmConfResponse = 0x07

	// 限位设置信息
	LiftFramePositionConfRequest  = 0x08
	LiftFramePositionConfResponse = 0x09

	// 实时数据信息
	LiftFrameRealtimeDataRequest  = 0x0a
	LiftFrameRealtimeDataResponse = 0x0b

	// 报警信息
	LiftFrameAlarmRequest  = 0x0e
	LiftFrameAlarmResponse = 0x0f

	// 工作循环上报
	LiftFrameLoopDataRequest  = 0x0c
	LiftFrameLoopDataResponse = 0x0d
)

var LiftFrameMap = map[byte]func(string, byte, byte, []byte) ([]byte, error){
	LiftFrameAuthRequest:         LiftFramAuthRequestHandle,
	LiftFrameBaseInfoRequest:     LiftFrameBaseInfoRequestHandle,
	//LiftFrameSensorConfRequest:   LiftFrameSensorConfRequestHandle,
	LiftFrameAlarmConfRequest:    LiftFrameAlarmConfRequestHandle,
	//LiftFramePositionConfRequest: LiftFramePositionConfRequestHandle,
	LiftFrameRealtimeDataRequest: LiftFrameRealtimeDataRequestHandle,
	LiftFrameAlarmRequest:        LiftFrameAlarmRequestHandle,
	LiftFrameLoopDataRequest:     LiftFrameLoopDataRequestHandle,
}

func makeResponse(sn string, liftNo byte, frameType byte, version byte, data []byte) []byte {
	ret := []byte{}

	// 开始标志
	start := []byte{0xA5, 0x5A}
	ret = append(ret, start...)

	// 版本
	ret = append(ret, version)
	// 帧类型
	ret = append(ret, frameType)

	// 塔机编号
	ret = append(ret, liftNo)

	// 设备代码
	ret = append(ret, []byte(sn)...)
	if len(sn) < 32 {
		// 填充空格
		spaceLength := 32 - len(sn)
		for i := 0; i < spaceLength; i++ {
			ret = append(ret, ' ')
		}
	}

	// 信息字段长度
	dataLength := int8(len(data))
	ret = append(ret, byte(dataLength>>8))
	ret = append(ret, byte(dataLength))

	// 信息段
	ret = append(ret, data...)

	// crc
	crc := Crc8(data)
	ret = append(ret, byte(crc))

	// 尾部
	ret = append(ret, 0xcc)
	ret = append(ret, 0x33)
	ret = append(ret, 0xc3)
	ret = append(ret, 0x3c)
	go timetask.UpdateLiftTime(sn)
	return ret
}

func checkAuth(sn string) (int64, string) {
	key := fmt.Sprintf("lift-%s", sn)
	str, _ := cache.Redis().Get(key)
	array := strings.Split(str, "----")
	if len(array) < 2 {
		return 0, ""
	}
	projectId, _ := strconv.ParseInt(array[0], 10, 64)
	if projectId > 0 {
		authCache(sn, projectId, array[1])
	}
	return projectId, array[1]
}

func authCache(sn string, projectId int64, name string) {
	key := fmt.Sprintf("lift-%s", sn)
	cache.Redis().SetEx(key, 3600, fmt.Sprintf("%d----%s", projectId, name))
}

func LiftFrameParse(data []byte) ([]byte, string, error) {
	dataLength := len(data)

	// 版本号
	version := data[2]

	// 帧类型
	frameType := data[3]

	// 塔机编号
	liftNo := data[4]

	// 设备sn码
	sn := string(data[5:37])

	// 信息段长度
	infolength := int(data[37])<<8 + int(data[38])

	// crc
	crc := Crc8(data[39 : 39+int(infolength)])
	originCrc := data[dataLength-5]
	if crc != originCrc {
		return nil, sn, errors.New("crc error")
	}

	// 帧类型检查
	handler, ok := LiftFrameMap[frameType]
	if ok == false {
		return nil, sn, errors.New(fmt.Sprintf("unknown frame %x", frameType))
	}
	sn = strings.TrimSpace(sn)
	// 帧处理
	res, err := handler(sn, liftNo, version, data[39:39+infolength])
	return res, sn, err
}