const formatTime = date => {
  const year = date.getFullYear()
  const month = date.getMonth() + 1
  const day = date.getDate()
  const hour = date.getHours()
  const minute = date.getMinutes()
  const second = date.getSeconds()

  return `${[year, month, day].map(formatNumber).join('/')} ${[hour, minute, second].map(formatNumber).join(':')}`
}

const formatNumber = n => {
  n = n.toString()
  return n[1] ? n : `0${n}`
}

const FRAME_CTRL_POSITION_ENCRYPTED = 0;
const FRAME_CTRL_POSITION_CHECKSUM = 1;
const FRAME_CTRL_POSITION_DATA_DIRECTION = 2;
const FRAME_CTRL_POSITION_REQUIRE_ACK = 3;
const FRAME_CTRL_POSITION_FRAG = 4;
const DIRECTION_OUTPUT = 0;
const DIRECTION_INPUT = 1;
const AES_BASE_IV = [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0];
const NEG_SET_SEC_TOTAL_LEN = 0x00;
const NEG_SET_SEC_ALL_DATA = 0x01;
const PACKAGE_VALUE = 0x01;
const SUBTYPE_NEG = 0x00;
const SUBTYPE_END = 0x03;
const SUBTYPE_WIFI_NEG = 0x09;
const SUBTYPE_SET_SSID = 0x2;
const SUBTYPE_SET_PWD = 0x3;
const SUBTYPE_WIFI_LIST_NEG = 11;
const SUBTYPE_NEGOTIATION_NEG = 0;
const SUBTYPE_CUSTOM_DATA = 0x13;
const PACKAGE_MSG_HEADER = 0xCD;
const PACKAGE_MSG_TYPE = 0x1F;
var DH_P = "cf5cf5c38419a724957ff5dd323b9c45c3cdd261eb740f69aa94b8bb1a5c96409153bd76b24222d03274e4725a5406092e9e82e9135c643cae98132b0d95f7d65347c68afc1e677da90e51bbab5f5cf429c291b4ba39c6b2dc5e8c7231e46aa7728e87664532cdf547be20c9a3fa8342be6e34371a27c06f7dc0edddd2f86373";
var DH_G = "02";

const descSucList = ["蓝牙连接...", "蓝牙连接成功", "成功获取设备信息", "获取属性信息成功", "发送配置信息...", "配置信息发送成功", "连接成功"];
const descFailList = ["蓝牙连接失败", "获取设备信息失败", "获取属性信息失败", "发送配置信息失败", "分配网络失败"];
const successList = { "0": "NULL", "1": "STA", "2": "SoftAP", "3": "SoftAP & STA" };
const failList = { "0": "sequence error", "1": "checksum error", "2": "decrypt error", "3": "encrypt error", "4": "init security error", "5": "dh malloc error", "6": "dh param error", "7": "read param error", "8": "make public error" };
var CRC_TB = [
  0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7, 0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
  0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6, 0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
  0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485, 0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
  0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4, 0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
  0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823, 0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
  0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12, 0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
  0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41, 0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
  0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70, 0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
  0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f, 0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
  0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e, 0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
  0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d, 0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
  0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c, 0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
  0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab, 0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
  0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a, 0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
  0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9, 0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
  0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8, 0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
];

const showToast = title => {
  wx.showToast({
    title: title,
    icon: 'none',
    duration: 2000
  })
}
//转16进制
const ab2hex = buffer => {
  var hexArr = Array.prototype.map.call(
    new Uint8Array(buffer),
    function (bit) {
      return ('00' + bit.toString(16)).slice(-2)
    }
  )
  return hexArr;
}
//16进制转字符串
const hexCharCodeToStr = hexCharCodeStr => {
  var trimedStr = hexCharCodeStr.trim();
  var rawStr =
    trimedStr.substr(0, 2).toLowerCase() === "0x" ? trimedStr.substr(2) : trimedStr;
  var len = rawStr.length;
  if (len % 2 !== 0) {
    alert("非法格式ASCII码!");
    return "";
  }
  var curCharCode;
  var resultStr = [];
  for (var i = 0; i < len; i = i + 2) {
    curCharCode = parseInt(rawStr.substr(i, 2), 16); // ASCII Code Value
    resultStr.push(String.fromCharCode(curCharCode));
  }
  return resultStr.join("");
}
//过滤名称
const filterDevice = (devices, name) => {
  var list = [];
  for (var i = 0; i < devices.length; i++) {
    var device = devices[i];
    if (device[name] != '') {
      //console.log(device[name])
      if (device[name].indexOf('LZ-OTA') !== -1) {
        device['beOnline'] = '';
        list.push(device);
      }
    }
  }
  return list;
  // var arr = sortArrObj(list,[['RSSI','asc']]);
  // return arr.length > 3?arr.slice(0,3):arr;
}
//获去type
const getType = (pkgType, subType) => {
  return (subType << 2) | pkgType;
}
//unit8Arry转数组
const uint8ArrayToArray = uint8Array => {
  var array = [];

  for (var i = 0; i < uint8Array.byteLength; i++) {
    array[i] = uint8Array[i];
  }

  return array;
}
//16进制转二进制数组 
const hexToBinArray = str => {
  var dec = parseInt(str, 16),
    bin = dec.toString(2),
    len = bin.length;
  if (len < 8) {
    var diff = 8 - len,
      zeros = "";
    for (var i = 0; i < diff; i++) {
      zeros += "0";
    }
    bin = zeros + bin;
  }
  return bin.split("");
}
//16进制转数组
const hexByArray = str => {
  var arr = [];
  if (str.length % 2 != 0) {
    str = "0" + str;
  }
  for (var i = 0; i < str.length; i += 2) {
    arr.push(str.substring(i, i + 2))
  }
  return arr;
}
//16进制转整形数组
const hexByInt = str => {
  var arr = [];
  if (str.length % 2 != 0) {
    str = "0" + str;
  }
  for (var i = 0; i < str.length; i += 2) {
    arr.push(parseInt(str.substring(i, i + 2), 16))
  }
  return arr;
}
//排序
const sortBy = (attr, rev) => {
  //第二个参数没有传递 默认升序排列
  if (rev == undefined) {
    rev = 1;
  } else {
    rev = (rev) ? 1 : -1;
  }
  return function (a, b) {
    a = a[attr];
    b = b[attr];
    if (a < b) {
      return rev * -1;
    } else if (a > b) {
      return rev * 1;
    }
    return 0;
  }
}

/**
 * 对数组对象的指定属性进行排序
 * @param {Array} arr 数组对象
 * @param {Array} rules 排序规则，每个元素都是形如 ['key', 'asc'] 或者 ['key', 'desc'] 的数组
 */
function sortArrObj(arr, rules) {
  return arr.sort((a, b) => {
    for (let i = 0; i < rules.length; i++) {
      const [key, direction] = rules[i];
      const order = direction === 'desc' ? -1 : 1;
      if (a[key] < b[key]) {
        return -1 * order;
      }
      if (a[key] > b[key]) {
        return 1 * order;
      }
    }
    return 0;
  });
}
//判断非空
const _isEmpty = str => {
  if (str === "" || str === null || str === undefined || str === "null" || str === "undefined") {
    return true;
  } else {
    return false;
  }
}
//组装数据格式 
const writeData = (data) => {
  var value = [];
  value.push(0xcd);
  value.push(0x1f);
  value.push(0x00);
  value.push(data.length + 4);
  value = value.concat(data);
  value.push(0xff);
  value.push(0xff);
  value.push(0xff);
  value.push(0xff);
  return value;
}

const writeSetting = (data) => {
  var value = [];
  value.push(0xcd);
  value.push(0x23);
  value.push(0x00);
  value.push(data.length + 4);
  value = value.concat(data);
  value.push(0xff);
  value.push(0xff);
  value.push(0xff);
  value.push(0xff);
  return value;
}

//是否分包
const isSubcontractor = (data, checksum, sequence) => {
  var len = 0, lenData = [], laveData = [], flag = false;
  var total = data.length;
  if (total > 20) {
    if (checksum) {
      lenData = data.slice(0, 18);
      laveData = data.slice(18);
    } else {
      lenData = data.slice(0, 14);
      laveData = data.slice(14);
    }
    len = lenData.length;
    flag = true;
  } else {
    lenData = data;
    len = lenData.length;
  }
  if (checksum) {
    //lenData = assemblyChecksum(lenData, len, sequence);
  }
  return { "len": len, "lenData": lenData, "laveData": laveData, "flag": flag }
}
const assemblyChecksum = (list, len, sequence, encrypt) => {
  var checkData = [];
  checkData.push(sequence);
  checkData.push(len);
  checkData = checkData.concat(list);
  var crc = caluCRC(0, checkData);
  var checksumByte1 = crc & 0xff;
  var checksumByte2 = (crc >> 8) & 0xff;
  list.push(checksumByte1);
  list.push(checksumByte2);
  return list;
}
//加密发送的数据
const encrypt = (aesjs, md5Key, sequence, data, checksum) => {
  var iv = generateAESIV(sequence), sumArr = [], list = [];
  if (checksum) {
    var len = data.length - 2;
    list = data.slice(0, len);
    sumArr = data.slice(len);
  } else {
    list = data;
  }
  var encryptData = uint8ArrayToArray(blueAesEncrypt(aesjs, md5Key, iv, new Uint8Array(list)));
  return encryptData.concat(sumArr);
}
// aes加密
const blueAesEncrypt = (aesjs, mdKey, iv, bytes) => {
  var aesOfb = new aesjs.ModeOfOperation.ofb(mdKey, iv);
  var encryptedBytes = aesOfb.encrypt(bytes);
  return encryptedBytes;
}

//获取Frame Control
const getFrameCTRLValue = (encrypted, checksum, direction, requireAck, frag) => {
  var frame = 0;
  if (encrypted) {
    frame = frame | (1 << FRAME_CTRL_POSITION_ENCRYPTED);
  }
  if (checksum) {
    frame = frame | (1 << FRAME_CTRL_POSITION_CHECKSUM);
  }
  if (direction == DIRECTION_INPUT) {
    frame = frame | (1 << FRAME_CTRL_POSITION_DATA_DIRECTION);
  }
  if (requireAck) {
    frame = frame | (1 << FRAME_CTRL_POSITION_REQUIRE_ACK);
  }
  if (frag) {
    frame = frame | (1 << FRAME_CTRL_POSITION_FRAG);
  }
  return frame;
}
//获取aes iv
const generateAESIV = sequence => {
  var result = [];
  for (var i = 0; i < 16; i++) {
    if (i == 0) {
      result[0] = sequence;
    } else {
      result[i] = AES_BASE_IV[i];
    }
  }
  return result;
}
//计算CRC值
const caluCRC = (crc, pByte) => {
  crc = (~crc) & 0xffff;
  for (var i in pByte) {
    crc = CRC_TB[((crc & 0xffff) >> 8) ^ (pByte[i] & 0xff)] ^ ((crc & 0xffff) << 8);
  }
  return (~crc) & 0xffff;
}
const hsvToRgb = (h, s, v) => {
  var r, g, b;
  var i = Math.floor(h * 6);
  var f = h * 6 - i;
  var p = v * (1 - s);
  var q = v * (1 - f * s);
  var t = v * (1 - (1 - f) * s);

  switch (i % 6) {
    case 0: r = v, g = t, b = p; break;
    case 1: r = q, g = v, b = p; break;
    case 2: r = p, g = v, b = t; break;
    case 3: r = p, g = q, b = v; break;
    case 4: r = t, g = p, b = v; break;
    case 5: r = v, g = p, b = q; break;
  }

  return [Math.round(r * 255), Math.round(g * 255), Math.round(b * 255)];
}
const rgbToHsv = (r, g, b) => {
  r = r / 255, g = g / 255, b = b / 255;
  var max = Math.max(r, g, b), min = Math.min(r, g, b);
  var h, s, v = max;

  var d = max - min;
  s = max == 0 ? 0 : d / max;

  if (max == min) {
    h = 0; // achromatic
  } else {
    switch (max) {
      case r: h = (g - b) / d + (g < b ? 6 : 0); break;
      case g: h = (b - r) / d + 2; break;
      case b: h = (r - g) / d + 4; break;
    }
    h /= 6;
  }

  return Math.round(h * 360);
}
const createCanvas = (self) => {
  var context = wx.createCanvasContext('firstCanvas', self);
  var width = Math.floor(self.data.width * 0.7),
    height = width,
    cx = width / 2,
    cy = height / 2,
    radius = width / 2.3,
    imageData,
    pixels,
    hue, sat, value,
    i = 0, x, y, rx, ry, d,
    f, g, p, u, v, w, rgb;
  wx.canvasGetImageData({
    canvasId: 'firstCanvas',
    x: 0,
    y: 0,
    width: width,
    height: height,
    success(res) {
      var pixels = res.data;
      for (y = 0; y < height; y++) {
        for (x = 0; x < width; x++, i = i + 4) {
          rx = x - cx;
          ry = y - cy;
          d = rx * rx + ry * ry;
          if (d < radius * radius) {
            hue = 6 * (Math.atan2(ry, rx) + Math.PI) / (2 * Math.PI);
            sat = Math.sqrt(d) / radius;
            g = Math.floor(hue);
            f = hue - g;
            u = 255 * (1 - sat);
            v = 255 * (1 - sat * f);
            w = 255 * (1 - sat * (1 - f));
            pixels[i] = [255, v, u, u, w, 255, 255][g];
            pixels[i + 1] = [w, 255, 255, v, u, u, w][g];
            pixels[i + 2] = [u, u, w, 255, 255, v, u][g];
            pixels[i + 3] = 255;
          }
        }
      }
      wx.canvasPutImageData({
        canvasId: 'firstCanvas',
        x: 0,
        y: 0,
        width: width,
        height: height,
        data: pixels,
        success(res) {
          setTimeout(function () {
            context.beginPath();
            context.arc(cx, cy, radius * 0.6, 0, 2 * Math.PI);
            context.fillStyle = "#12151e";
            context.fill();
            context.stroke();
            context.draw(true);
            context.beginPath();
            context.arc(cx, cy, radius, 0, 2 * Math.PI);
            context.strokeStyle = "#12151e";
            context.lineWidth = 5;
            context.stroke();
            context.draw(true);
          })

        },
        fail(res) {
        }
      }, self)
    }
  })
}
const getColor = (self, event) => {
  //console.log(event);
  var x = event.touches[0].x,
    y = event.touches[0].y;
  wx.canvasGetImageData({
    canvasId: "firstCanvas",
    x: x,
    y: y,
    width: 1,
    height: 1,
    success(res) {
      var r = res.data[0],
        g = res.data[1],
        b = res.data[2];
      //console.log(r, g, b);
      // 特殊值过滤
      if ((r == 0 && g == 0 && b == 0) || (r == 18 && g == 21 && b == 30)) {
        return false;
      } else {
        self.setData({
          color: "rgba(" + r + ", " + g + ", " + b + ", " + self.data.currentLuminanceText / 100 + ")",
          currentSaturationText: 100,
          currentSaturation: 100,
          currentHue: rgbToHsv(r, g, b)
        })
        self.setDeviceStatus();
      }
    }
  })
}
module.exports = {
  formatTime,
  showToast: showToast,
  ab2hex: ab2hex,
  hexCharCodeToStr: hexCharCodeToStr,
  filterDevice: filterDevice,
  getType: getType,
  hexToBinArray: hexToBinArray,
  hexByArray: hexByArray,
  hexByInt: hexByInt,
  sortBy: sortBy,
  sortArrObj: sortArrObj,
  writeData: writeData,
  writeSetting: writeSetting,
  isSubcontractor: isSubcontractor,
  getFrameCTRLValue: getFrameCTRLValue,
  uint8ArrayToArray: uint8ArrayToArray,
  generateAESIV: generateAESIV,
  caluCRC: caluCRC,
  encrypt: encrypt,
  DH_P: DH_P,
  DH_G: DH_G,
  DIRECTION_OUTPUT: DIRECTION_OUTPUT,
  DIRECTION_INPUT: DIRECTION_INPUT,
  NEG_SET_SEC_TOTAL_LEN: NEG_SET_SEC_TOTAL_LEN,
  NEG_SET_SEC_ALL_DATA: NEG_SET_SEC_ALL_DATA,
  PACKAGE_VALUE: PACKAGE_VALUE,
  SUBTYPE_NEG: SUBTYPE_NEG,
  PACKAGE_CONTROL_VALUE: PACKAGE_MSG_HEADER,
  SUBTYPE_WIFI_MODEl: PACKAGE_MSG_TYPE,
  SUBTYPE_WIFI_NEG: SUBTYPE_WIFI_NEG,
  SUBTYPE_WIFI_LIST_NEG: SUBTYPE_WIFI_LIST_NEG,
  SUBTYPE_NEGOTIATION_NEG: SUBTYPE_NEGOTIATION_NEG,
  SUBTYPE_SET_SSID: SUBTYPE_SET_SSID,
  SUBTYPE_SET_PWD: SUBTYPE_SET_PWD,
  SUBTYPE_END: SUBTYPE_END,
  SUBTYPE_CUSTOM_DATA: SUBTYPE_CUSTOM_DATA,
  hsvToRgb: hsvToRgb,
  rgbToHsv: rgbToHsv,
  createCanvas: createCanvas,
  getColor: getColor,
  descSucList: descSucList,
  descFailList: descFailList,
  successList: successList,
  _isEmpty: _isEmpty
}