/**
 * 获取单个字符的utf8编码
 * unicode BMP平面约65535个字符
 * @param {num} code
 * return {array}
 */
"use strict";

function unicodeFormat8(code) {
  // 1 byte
  if (code < 128) {
    return [code];
    // 2 bytes
  } else if (code < 2048) {
    c0 = 192 + (code >> 6);
    c1 = 128 + (code & 63);
    return [c0, c1];
    // 3 bytes
  } else {
    c0 = 224 + (code >> 12);
    c1 = 128 + (code >> 6 & 63);
    c2 = 128 + (code & 63);
    return [c0, c1, c2];
  }
}

/**
 * 获取字符串的utf8编码字节串
 * @param {string} string
 * @return {array}
 */
function getUTF8Bytes(string) {
  var utf8codes = [];
  for (var i = 0; i < string.length; i++) {
    var code = string.charCodeAt(i);
    var utf8 = unicodeFormat8(code);
    for (var j = 0; j < utf8.length; j++) {
      utf8codes.push(utf8[j]);
    }
  }
  return utf8codes;
}

/**
 * 二维码算法实现
 * @param {string} data              要编码的信息字符串
 * @param {num} errorCorrectLevel 纠错等级
 */
function QRCodeAlg(data, errorCorrectLevel) {
  this.typeNumber = -1; //版本
  this.errorCorrectLevel = errorCorrectLevel;
  this.modules = null; //二维矩阵，存放最终结果
  this.moduleCount = 0; //矩阵大小
  this.dataCache = null; //数据缓存
  this.rsBlocks = null; //版本数据信息
  this.totalDataCount = -1; //可使用的数据量
  this.data = data;
  this.utf8bytes = getUTF8Bytes(data);
  this.make();
}

QRCodeAlg.prototype = {
  constructor: QRCodeAlg,
  /**
   * 获取二维码矩阵大小
   * @return {num} 矩阵大小
   */
  getModuleCount: function getModuleCount() {
    return this.moduleCount;
  },
  /**
   * 编码
   */
  make: function make() {
    this.getRightType();
    this.dataCache = this.createData();
    this.createQrcode();
  },
  /**
   * 设置二位矩阵功能图形
   * @param  {bool} test 表示是否在寻找最好掩膜阶段
   * @param  {num} maskPattern 掩膜的版本
   */
  makeImpl: function makeImpl(maskPattern) {

    this.moduleCount = this.typeNumber * 4 + 17;
    this.modules = new Array(this.moduleCount);

    for (var row = 0; row < this.moduleCount; row++) {

      this.modules[row] = new Array(this.moduleCount);
    }
    this.setupPositionProbePattern(0, 0);
    this.setupPositionProbePattern(this.moduleCount - 7, 0);
    this.setupPositionProbePattern(0, this.moduleCount - 7);
    this.setupPositionAdjustPattern();
    this.setupTimingPattern();
    this.setupTypeInfo(true, maskPattern);

    if (this.typeNumber >= 7) {
      this.setupTypeNumber(true);
    }
    this.mapData(this.dataCache, maskPattern);
  },
  /**
   * 设置二维码的位置探测图形
   * @param  {num} row 探测图形的中心横坐标
   * @param  {num} col 探测图形的中心纵坐标
   */
  setupPositionProbePattern: function setupPositionProbePattern(row, col) {

    for (var r = -1; r <= 7; r++) {

      if (row + r <= -1 || this.moduleCount <= row + r) continue;

      for (var c = -1; c <= 7; c++) {

        if (col + c <= -1 || this.moduleCount <= col + c) continue;

        if (0 <= r && r <= 6 && (c == 0 || c == 6) || 0 <= c && c <= 6 && (r == 0 || r == 6) || 2 <= r && r <= 4 && 2 <= c && c <= 4) {
          this.modules[row + r][col + c] = true;
        } else {
          this.modules[row + r][col + c] = false;
        }
      }
    }
  },
  /**
   * 创建二维码
   * @return {[type]} [description]
   */
  createQrcode: function createQrcode() {

    var minLostPoint = 0;
    var pattern = 0;
    var bestModules = null;

    for (var i = 0; i < 8; i++) {

      this.makeImpl(i);

      var lostPoint = QRUtil.getLostPoint(this);
      if (i == 0 || minLostPoint > lostPoint) {
        minLostPoint = lostPoint;
        pattern = i;
        bestModules = this.modules;
      }
    }
    this.modules = bestModules;
    this.setupTypeInfo(false, pattern);

    if (this.typeNumber >= 7) {
      this.setupTypeNumber(false);
    }
  },
  /**
   * 设置定位图形
   * @return {[type]} [description]
   */
  setupTimingPattern: function setupTimingPattern() {

    for (var r = 8; r < this.moduleCount - 8; r++) {
      if (this.modules[r][6] != null) {
        continue;
      }
      this.modules[r][6] = r % 2 == 0;

      if (this.modules[6][r] != null) {
        continue;
      }
      this.modules[6][r] = r % 2 == 0;
    }
  },
  /**
   * 设置矫正图形
   * @return {[type]} [description]
   */
  setupPositionAdjustPattern: function setupPositionAdjustPattern() {

    var pos = QRUtil.getPatternPosition(this.typeNumber);

    for (var i = 0; i < pos.length; i++) {

      for (var j = 0; j < pos.length; j++) {

        var row = pos[i];
        var col = pos[j];

        if (this.modules[row][col] != null) {
          continue;
        }

        for (var r = -2; r <= 2; r++) {

          for (var c = -2; c <= 2; c++) {

            if (r == -2 || r == 2 || c == -2 || c == 2 || r == 0 && c == 0) {
              this.modules[row + r][col + c] = true;
            } else {
              this.modules[row + r][col + c] = false;
            }
          }
        }
      }
    }
  },
  /**
   * 设置版本信息（7以上版本才有）
   * @param  {bool} test 是否处于判断最佳掩膜阶段
   * @return {[type]}      [description]
   */
  setupTypeNumber: function setupTypeNumber(test) {

    var bits = QRUtil.getBCHTypeNumber(this.typeNumber);

    for (var i = 0; i < 18; i++) {
      var mod = !test && (bits >> i & 1) == 1;
      this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod;
      this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
    }
  },
  /**
   * 设置格式信息（纠错等级和掩膜版本）
   * @param  {bool} test
   * @param  {num} maskPattern 掩膜版本
   * @return {}
   */
  setupTypeInfo: function setupTypeInfo(test, maskPattern) {

    var data = QRErrorCorrectLevel[this.errorCorrectLevel] << 3 | maskPattern;
    var bits = QRUtil.getBCHTypeInfo(data);

    // vertical
    for (var i = 0; i < 15; i++) {

      var mod = !test && (bits >> i & 1) == 1;

      if (i < 6) {
        this.modules[i][8] = mod;
      } else if (i < 8) {
        this.modules[i + 1][8] = mod;
      } else {
        this.modules[this.moduleCount - 15 + i][8] = mod;
      }

      // horizontal
      var mod = !test && (bits >> i & 1) == 1;

      if (i < 8) {
        this.modules[8][this.moduleCount - i - 1] = mod;
      } else if (i < 9) {
        this.modules[8][15 - i - 1 + 1] = mod;
      } else {
        this.modules[8][15 - i - 1] = mod;
      }
    }

    // fixed module
    this.modules[this.moduleCount - 8][8] = !test;
  },
  /**
   * 数据编码
   * @return {[type]} [description]
   */
  createData: function createData() {
    var buffer = new QRBitBuffer();
    var lengthBits = this.typeNumber > 9 ? 16 : 8;
    buffer.put(4, 4); //添加模式
    buffer.put(this.utf8bytes.length, lengthBits);
    for (var i = 0, l = this.utf8bytes.length; i < l; i++) {
      buffer.put(this.utf8bytes[i], 8);
    }
    if (buffer.length + 4 <= this.totalDataCount * 8) {
      buffer.put(0, 4);
    }

    // padding
    while (buffer.length % 8 != 0) {
      buffer.putBit(false);
    }

    // padding
    while (true) {

      if (buffer.length >= this.totalDataCount * 8) {
        break;
      }
      buffer.put(QRCodeAlg.PAD0, 8);

      if (buffer.length >= this.totalDataCount * 8) {
        break;
      }
      buffer.put(QRCodeAlg.PAD1, 8);
    }
    return this.createBytes(buffer);
  },
  /**
   * 纠错码编码
   * @param  {buffer} buffer 数据编码
   * @return {[type]}
   */
  createBytes: function createBytes(buffer) {

    var offset = 0;

    var maxDcCount = 0;
    var maxEcCount = 0;

    var length = this.rsBlock.length / 3;

    var rsBlocks = new Array();

    for (var i = 0; i < length; i++) {

      var count = this.rsBlock[i * 3 + 0];
      var totalCount = this.rsBlock[i * 3 + 1];
      var dataCount = this.rsBlock[i * 3 + 2];

      for (var j = 0; j < count; j++) {
        rsBlocks.push([dataCount, totalCount]);
      }
    }

    var dcdata = new Array(rsBlocks.length);
    var ecdata = new Array(rsBlocks.length);

    for (var r = 0; r < rsBlocks.length; r++) {

      var dcCount = rsBlocks[r][0];
      var ecCount = rsBlocks[r][1] - dcCount;

      maxDcCount = Math.max(maxDcCount, dcCount);
      maxEcCount = Math.max(maxEcCount, ecCount);

      dcdata[r] = new Array(dcCount);

      for (var i = 0; i < dcdata[r].length; i++) {
        dcdata[r][i] = 0xff & buffer.buffer[i + offset];
      }
      offset += dcCount;

      var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount);
      var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);

      var modPoly = rawPoly.mod(rsPoly);
      ecdata[r] = new Array(rsPoly.getLength() - 1);
      for (var i = 0; i < ecdata[r].length; i++) {
        var modIndex = i + modPoly.getLength() - ecdata[r].length;
        ecdata[r][i] = modIndex >= 0 ? modPoly.get(modIndex) : 0;
      }
    }

    var data = new Array(this.totalDataCount);
    var index = 0;

    for (var i = 0; i < maxDcCount; i++) {
      for (var r = 0; r < rsBlocks.length; r++) {
        if (i < dcdata[r].length) {
          data[index++] = dcdata[r][i];
        }
      }
    }

    for (var i = 0; i < maxEcCount; i++) {
      for (var r = 0; r < rsBlocks.length; r++) {
        if (i < ecdata[r].length) {
          data[index++] = ecdata[r][i];
        }
      }
    }

    return data;
  },
  /**
   * 布置模块，构建最终信息
   * @param  {} data
   * @param  {} maskPattern
   * @return {}
   */
  mapData: function mapData(data, maskPattern) {

    var inc = -1;
    var row = this.moduleCount - 1;
    var bitIndex = 7;
    var byteIndex = 0;

    for (var col = this.moduleCount - 1; col > 0; col -= 2) {

      if (col == 6) col--;

      while (true) {

        for (var c = 0; c < 2; c++) {

          if (this.modules[row][col - c] == null) {

            var dark = false;

            if (byteIndex < data.length) {
              dark = (data[byteIndex] >>> bitIndex & 1) == 1;
            }

            var mask = QRUtil.getMask(maskPattern, row, col - c);

            if (mask) {
              dark = !dark;
            }

            this.modules[row][col - c] = dark;
            bitIndex--;

            if (bitIndex == -1) {
              byteIndex++;
              bitIndex = 7;
            }
          }
        }

        row += inc;

        if (row < 0 || this.moduleCount <= row) {
          row -= inc;
          inc = -inc;
          break;
        }
      }
    }
  }

};
/**
 * 填充字段
 */
QRCodeAlg.PAD0 = 0xEC;
QRCodeAlg.PAD1 = 0x11;

//---------------------------------------------------------------------
// 纠错等级对应的编码
//---------------------------------------------------------------------

var QRErrorCorrectLevel = [1, 0, 3, 2];

//---------------------------------------------------------------------
// 掩膜版本
//---------------------------------------------------------------------

var QRMaskPattern = {
  PATTERN000: 0,
  PATTERN001: 1,
  PATTERN010: 2,
  PATTERN011: 3,
  PATTERN100: 4,
  PATTERN101: 5,
  PATTERN110: 6,
  PATTERN111: 7
};

//---------------------------------------------------------------------
// 工具类
//---------------------------------------------------------------------

var QRUtil = {

  /*
 每个版本矫正图形的位置
  */
  PATTERN_POSITION_TABLE: [[], [6, 18], [6, 22], [6, 26], [6, 30], [6, 34], [6, 22, 38], [6, 24, 42], [6, 26, 46], [6, 28, 50], [6, 30, 54], [6, 32, 58], [6, 34, 62], [6, 26, 46, 66], [6, 26, 48, 70], [6, 26, 50, 74], [6, 30, 54, 78], [6, 30, 56, 82], [6, 30, 58, 86], [6, 34, 62, 90], [6, 28, 50, 72, 94], [6, 26, 50, 74, 98], [6, 30, 54, 78, 102], [6, 28, 54, 80, 106], [6, 32, 58, 84, 110], [6, 30, 58, 86, 114], [6, 34, 62, 90, 118], [6, 26, 50, 74, 98, 122], [6, 30, 54, 78, 102, 126], [6, 26, 52, 78, 104, 130], [6, 30, 56, 82, 108, 134], [6, 34, 60, 86, 112, 138], [6, 30, 58, 86, 114, 142], [6, 34, 62, 90, 118, 146], [6, 30, 54, 78, 102, 126, 150], [6, 24, 50, 76, 102, 128, 154], [6, 28, 54, 80, 106, 132, 158], [6, 32, 58, 84, 110, 136, 162], [6, 26, 54, 82, 110, 138, 166], [6, 30, 58, 86, 114, 142, 170]],

  G15: 1 << 10 | 1 << 8 | 1 << 5 | 1 << 4 | 1 << 2 | 1 << 1 | 1 << 0,
  G18: 1 << 12 | 1 << 11 | 1 << 10 | 1 << 9 | 1 << 8 | 1 << 5 | 1 << 2 | 1 << 0,
  G15_MASK: 1 << 14 | 1 << 12 | 1 << 10 | 1 << 4 | 1 << 1,

  /*
 BCH编码格式信息
  */
  getBCHTypeInfo: function getBCHTypeInfo(data) {
    var d = data << 10;
    while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
      d ^= QRUtil.G15 << QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15);
    }
    return (data << 10 | d) ^ QRUtil.G15_MASK;
  },
  /*
 BCH编码版本信息
  */
  getBCHTypeNumber: function getBCHTypeNumber(data) {
    var d = data << 12;
    while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
      d ^= QRUtil.G18 << QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18);
    }
    return data << 12 | d;
  },
  /*
 获取BCH位信息
  */
  getBCHDigit: function getBCHDigit(data) {

    var digit = 0;

    while (data != 0) {
      digit++;
      data >>>= 1;
    }

    return digit;
  },
  /*
 获取版本对应的矫正图形位置
  */
  getPatternPosition: function getPatternPosition(typeNumber) {
    return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
  },
  /*
 掩膜算法
  */
  getMask: function getMask(maskPattern, i, j) {

    switch (maskPattern) {

      case QRMaskPattern.PATTERN000:
        return (i + j) % 2 == 0;
      case QRMaskPattern.PATTERN001:
        return i % 2 == 0;
      case QRMaskPattern.PATTERN010:
        return j % 3 == 0;
      case QRMaskPattern.PATTERN011:
        return (i + j) % 3 == 0;
      case QRMaskPattern.PATTERN100:
        return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0;
      case QRMaskPattern.PATTERN101:
        return i * j % 2 + i * j % 3 == 0;
      case QRMaskPattern.PATTERN110:
        return (i * j % 2 + i * j % 3) % 2 == 0;
      case QRMaskPattern.PATTERN111:
        return (i * j % 3 + (i + j) % 2) % 2 == 0;

      default:
        throw new Error("bad maskPattern:" + maskPattern);
    }
  },
  /*
 获取RS的纠错多项式
  */
  getErrorCorrectPolynomial: function getErrorCorrectPolynomial(errorCorrectLength) {

    var a = new QRPolynomial([1], 0);

    for (var i = 0; i < errorCorrectLength; i++) {
      a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0));
    }

    return a;
  },
  /*
 获取评价
  */
  getLostPoint: function getLostPoint(qrCode) {

    var moduleCount = qrCode.getModuleCount(),
      lostPoint = 0,
      darkCount = 0;

    for (var row = 0; row < moduleCount; row++) {

      var sameCount = 0;
      var head = qrCode.modules[row][0];

      for (var col = 0; col < moduleCount; col++) {

        var current = qrCode.modules[row][col];

        //level 3 评价
        if (col < moduleCount - 6) {
          if (current && !qrCode.modules[row][col + 1] && qrCode.modules[row][col + 2] && qrCode.modules[row][col + 3] && qrCode.modules[row][col + 4] && !qrCode.modules[row][col + 5] && qrCode.modules[row][col + 6]) {
            if (col < moduleCount - 10) {
              if (qrCode.modules[row][col + 7] && qrCode.modules[row][col + 8] && qrCode.modules[row][col + 9] && qrCode.modules[row][col + 10]) {
                lostPoint += 40;
              }
            } else if (col > 3) {
              if (qrCode.modules[row][col - 1] && qrCode.modules[row][col - 2] && qrCode.modules[row][col - 3] && qrCode.modules[row][col - 4]) {
                lostPoint += 40;
              }
            }
          }
        }

        //level 2 评价
        if (row < moduleCount - 1 && col < moduleCount - 1) {
          var count = 0;
          if (current) count++;
          if (qrCode.modules[row + 1][col]) count++;
          if (qrCode.modules[row][col + 1]) count++;
          if (qrCode.modules[row + 1][col + 1]) count++;
          if (count == 0 || count == 4) {
            lostPoint += 3;
          }
        }

        //level 1 评价
        if (head ^ current) {
          sameCount++;
        } else {
          head = current;
          if (sameCount >= 5) {
            lostPoint += 3 + sameCount - 5;
          }
          sameCount = 1;
        }

        //level 4 评价
        if (current) {
          darkCount++;
        }
      }
    }

    for (var col = 0; col < moduleCount; col++) {

      var sameCount = 0;
      var head = qrCode.modules[0][col];

      for (var row = 0; row < moduleCount; row++) {

        var current = qrCode.modules[row][col];

        //level 3 评价
        if (row < moduleCount - 6) {
          if (current && !qrCode.modules[row + 1][col] && qrCode.modules[row + 2][col] && qrCode.modules[row + 3][col] && qrCode.modules[row + 4][col] && !qrCode.modules[row + 5][col] && qrCode.modules[row + 6][col]) {
            if (row < moduleCount - 10) {
              if (qrCode.modules[row + 7][col] && qrCode.modules[row + 8][col] && qrCode.modules[row + 9][col] && qrCode.modules[row + 10][col]) {
                lostPoint += 40;
              }
            } else if (row > 3) {
              if (qrCode.modules[row - 1][col] && qrCode.modules[row - 2][col] && qrCode.modules[row - 3][col] && qrCode.modules[row - 4][col]) {
                lostPoint += 40;
              }
            }
          }
        }

        //level 1 评价
        if (head ^ current) {
          sameCount++;
        } else {
          head = current;
          if (sameCount >= 5) {
            lostPoint += 3 + sameCount - 5;
          }
          sameCount = 1;
        }
      }
    }

    // LEVEL4

    var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5;
    lostPoint += ratio * 10;

    return lostPoint;
  }

};

//---------------------------------------------------------------------
// QRMath使用的数学工具
//---------------------------------------------------------------------

var QRMath = {
  /*
 将n转化为a^m
  */
  glog: function glog(n) {

    if (n < 1) {
      throw new Error("glog(" + n + ")");
    }

    return QRMath.LOG_TABLE[n];
  },
  /*
 将a^m转化为n
  */
  gexp: function gexp(n) {

    while (n < 0) {
      n += 255;
    }

    while (n >= 256) {
      n -= 255;
    }

    return QRMath.EXP_TABLE[n];
  },

  EXP_TABLE: new Array(256),

  LOG_TABLE: new Array(256)

};

for (var i = 0; i < 8; i++) {
  QRMath.EXP_TABLE[i] = 1 << i;
}
for (var i = 8; i < 256; i++) {
  QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8];
}
for (var i = 0; i < 255; i++) {
  QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i;
}

//---------------------------------------------------------------------
// QRPolynomial 多项式
//---------------------------------------------------------------------
/**
 * 多项式类
 * @param {Array} num   系数
 * @param {num} shift a^shift
 */
function QRPolynomial(num, shift) {

  if (num.length == undefined) {
    throw new Error(num.length + "/" + shift);
  }

  var offset = 0;

  while (offset < num.length && num[offset] == 0) {
    offset++;
  }

  this.num = new Array(num.length - offset + shift);
  for (var i = 0; i < num.length - offset; i++) {
    this.num[i] = num[i + offset];
  }
}

QRPolynomial.prototype = {

  get: function get(index) {
    return this.num[index];
  },

  getLength: function getLength() {
    return this.num.length;
  },
  /**
   * 多项式乘法
   * @param  {QRPolynomial} e 被乘多项式
   * @return {[type]}   [description]
   */
  multiply: function multiply(e) {

    var num = new Array(this.getLength() + e.getLength() - 1);

    for (var i = 0; i < this.getLength(); i++) {
      for (var j = 0; j < e.getLength(); j++) {
        num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)));
      }
    }

    return new QRPolynomial(num, 0);
  },
  /**
   * 多项式模运算
   * @param  {QRPolynomial} e 模多项式
   * @return {}
   */
  mod: function mod(e) {
    var tl = this.getLength(),
      el = e.getLength();
    if (tl - el < 0) {
      return this;
    }
    var num = new Array(tl);
    for (var i = 0; i < tl; i++) {
      num[i] = this.get(i);
    }
    while (num.length >= el) {
      var ratio = QRMath.glog(num[0]) - QRMath.glog(e.get(0));

      for (var i = 0; i < e.getLength(); i++) {
        num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio);
      }
      while (num[0] == 0) {
        num.shift();
      }
    }
    return new QRPolynomial(num, 0);
  }
};

//---------------------------------------------------------------------
// RS_BLOCK_TABLE
//---------------------------------------------------------------------
/*
二维码各个版本信息[块数, 每块中的数据块数, 每块中的信息块数]
 */
var RS_BLOCK_TABLE = [

// L
// M
// Q
// H

// 1
  [1, 26, 19], [1, 26, 16], [1, 26, 13], [1, 26, 9],

// 2
  [1, 44, 34], [1, 44, 28], [1, 44, 22], [1, 44, 16],

// 3
  [1, 70, 55], [1, 70, 44], [2, 35, 17], [2, 35, 13],

// 4
  [1, 100, 80], [2, 50, 32], [2, 50, 24], [4, 25, 9],

// 5
  [1, 134, 108], [2, 67, 43], [2, 33, 15, 2, 34, 16], [2, 33, 11, 2, 34, 12],

// 6
  [2, 86, 68], [4, 43, 27], [4, 43, 19], [4, 43, 15],

// 7
  [2, 98, 78], [4, 49, 31], [2, 32, 14, 4, 33, 15], [4, 39, 13, 1, 40, 14],

// 8
  [2, 121, 97], [2, 60, 38, 2, 61, 39], [4, 40, 18, 2, 41, 19], [4, 40, 14, 2, 41, 15],

// 9
  [2, 146, 116], [3, 58, 36, 2, 59, 37], [4, 36, 16, 4, 37, 17], [4, 36, 12, 4, 37, 13],

// 10
  [2, 86, 68, 2, 87, 69], [4, 69, 43, 1, 70, 44], [6, 43, 19, 2, 44, 20], [6, 43, 15, 2, 44, 16],

// 11
  [4, 101, 81], [1, 80, 50, 4, 81, 51], [4, 50, 22, 4, 51, 23], [3, 36, 12, 8, 37, 13],

// 12
  [2, 116, 92, 2, 117, 93], [6, 58, 36, 2, 59, 37], [4, 46, 20, 6, 47, 21], [7, 42, 14, 4, 43, 15],

// 13
  [4, 133, 107], [8, 59, 37, 1, 60, 38], [8, 44, 20, 4, 45, 21], [12, 33, 11, 4, 34, 12],

// 14
  [3, 145, 115, 1, 146, 116], [4, 64, 40, 5, 65, 41], [11, 36, 16, 5, 37, 17], [11, 36, 12, 5, 37, 13],

// 15
  [5, 109, 87, 1, 110, 88], [5, 65, 41, 5, 66, 42], [5, 54, 24, 7, 55, 25], [11, 36, 12],

// 16
  [5, 122, 98, 1, 123, 99], [7, 73, 45, 3, 74, 46], [15, 43, 19, 2, 44, 20], [3, 45, 15, 13, 46, 16],

// 17
  [1, 135, 107, 5, 136, 108], [10, 74, 46, 1, 75, 47], [1, 50, 22, 15, 51, 23], [2, 42, 14, 17, 43, 15],

// 18
  [5, 150, 120, 1, 151, 121], [9, 69, 43, 4, 70, 44], [17, 50, 22, 1, 51, 23], [2, 42, 14, 19, 43, 15],

// 19
  [3, 141, 113, 4, 142, 114], [3, 70, 44, 11, 71, 45], [17, 47, 21, 4, 48, 22], [9, 39, 13, 16, 40, 14],

// 20
  [3, 135, 107, 5, 136, 108], [3, 67, 41, 13, 68, 42], [15, 54, 24, 5, 55, 25], [15, 43, 15, 10, 44, 16],

// 21
  [4, 144, 116, 4, 145, 117], [17, 68, 42], [17, 50, 22, 6, 51, 23], [19, 46, 16, 6, 47, 17],

// 22
  [2, 139, 111, 7, 140, 112], [17, 74, 46], [7, 54, 24, 16, 55, 25], [34, 37, 13],

// 23
  [4, 151, 121, 5, 152, 122], [4, 75, 47, 14, 76, 48], [11, 54, 24, 14, 55, 25], [16, 45, 15, 14, 46, 16],

// 24
  [6, 147, 117, 4, 148, 118], [6, 73, 45, 14, 74, 46], [11, 54, 24, 16, 55, 25], [30, 46, 16, 2, 47, 17],

// 25
  [8, 132, 106, 4, 133, 107], [8, 75, 47, 13, 76, 48], [7, 54, 24, 22, 55, 25], [22, 45, 15, 13, 46, 16],

// 26
  [10, 142, 114, 2, 143, 115], [19, 74, 46, 4, 75, 47], [28, 50, 22, 6, 51, 23], [33, 46, 16, 4, 47, 17],

// 27
  [8, 152, 122, 4, 153, 123], [22, 73, 45, 3, 74, 46], [8, 53, 23, 26, 54, 24], [12, 45, 15, 28, 46, 16],

// 28
  [3, 147, 117, 10, 148, 118], [3, 73, 45, 23, 74, 46], [4, 54, 24, 31, 55, 25], [11, 45, 15, 31, 46, 16],

// 29
  [7, 146, 116, 7, 147, 117], [21, 73, 45, 7, 74, 46], [1, 53, 23, 37, 54, 24], [19, 45, 15, 26, 46, 16],

// 30
  [5, 145, 115, 10, 146, 116], [19, 75, 47, 10, 76, 48], [15, 54, 24, 25, 55, 25], [23, 45, 15, 25, 46, 16],

// 31
  [13, 145, 115, 3, 146, 116], [2, 74, 46, 29, 75, 47], [42, 54, 24, 1, 55, 25], [23, 45, 15, 28, 46, 16],

// 32
  [17, 145, 115], [10, 74, 46, 23, 75, 47], [10, 54, 24, 35, 55, 25], [19, 45, 15, 35, 46, 16],

// 33
  [17, 145, 115, 1, 146, 116], [14, 74, 46, 21, 75, 47], [29, 54, 24, 19, 55, 25], [11, 45, 15, 46, 46, 16],

// 34
  [13, 145, 115, 6, 146, 116], [14, 74, 46, 23, 75, 47], [44, 54, 24, 7, 55, 25], [59, 46, 16, 1, 47, 17],

// 35
  [12, 151, 121, 7, 152, 122], [12, 75, 47, 26, 76, 48], [39, 54, 24, 14, 55, 25], [22, 45, 15, 41, 46, 16],

// 36
  [6, 151, 121, 14, 152, 122], [6, 75, 47, 34, 76, 48], [46, 54, 24, 10, 55, 25], [2, 45, 15, 64, 46, 16],

// 37
  [17, 152, 122, 4, 153, 123], [29, 74, 46, 14, 75, 47], [49, 54, 24, 10, 55, 25], [24, 45, 15, 46, 46, 16],

// 38
  [4, 152, 122, 18, 153, 123], [13, 74, 46, 32, 75, 47], [48, 54, 24, 14, 55, 25], [42, 45, 15, 32, 46, 16],

// 39
  [20, 147, 117, 4, 148, 118], [40, 75, 47, 7, 76, 48], [43, 54, 24, 22, 55, 25], [10, 45, 15, 67, 46, 16],

// 40
  [19, 148, 118, 6, 149, 119], [18, 75, 47, 31, 76, 48], [34, 54, 24, 34, 55, 25], [20, 45, 15, 61, 46, 16]];

/**
 * 根据数据获取对应版本
 * @return {[type]} [description]
 */
QRCodeAlg.prototype.getRightType = function () {
  for (var typeNumber = 1; typeNumber < 41; typeNumber++) {
    var rsBlock = RS_BLOCK_TABLE[(typeNumber - 1) * 4 + this.errorCorrectLevel];
    if (rsBlock == undefined) {
      throw new Error("bad rs block @ typeNumber:" + typeNumber + "/errorCorrectLevel:" + this.errorCorrectLevel);
    }
    var length = rsBlock.length / 3;
    var totalDataCount = 0;
    for (var i = 0; i < length; i++) {
      var count = rsBlock[i * 3 + 0];
      var dataCount = rsBlock[i * 3 + 2];
      totalDataCount += dataCount * count;
    }

    var lengthBytes = typeNumber > 9 ? 2 : 1;
    if (this.utf8bytes.length + lengthBytes < totalDataCount || typeNumber == 40) {
      this.typeNumber = typeNumber;
      this.rsBlock = rsBlock;
      this.totalDataCount = totalDataCount;
      break;
    }
  }
};

//---------------------------------------------------------------------
// QRBitBuffer
//---------------------------------------------------------------------

function QRBitBuffer() {
  this.buffer = new Array();
  this.length = 0;
}

QRBitBuffer.prototype = {

  get: function get(index) {
    var bufIndex = Math.floor(index / 8);
    return this.buffer[bufIndex] >>> 7 - index % 8 & 1;
  },

  put: function put(num, length) {
    for (var i = 0; i < length; i++) {
      this.putBit(num >>> length - i - 1 & 1);
    }
  },

  putBit: function putBit(bit) {

    var bufIndex = Math.floor(this.length / 8);
    if (this.buffer.length <= bufIndex) {
      this.buffer.push(0);
    }

    if (bit) {
      this.buffer[bufIndex] |= 0x80 >>> this.length % 8;
    }

    this.length++;
  }
};
module.exports = QRCodeAlg;