/**
 * A minimal QR Code generator implementation
 * Based on qrcode-generator by Kazuhiko Arase
 */

type QRMode = 1 | 2 | 4 | 8;
type QRErrorCorrectionLevel = 'L' | 'M' | 'Q' | 'H';

interface QRBitBuffer {
  buffer: number[];
  length: number;
  get(index: number): boolean;
  put(num: number, length: number): void;
  putBit(bit: boolean): void;
}

export class QRCodeModel {
  typeNumber: number;
  errorCorrectionLevel: QRErrorCorrectionLevel;
  modules: (boolean | null)[][] = [];
  moduleCount: number = 0;
  dataCache: number[] | null = null;
  dataList: { mode: QRMode; data: string }[] = [];

  constructor(typeNumber: number, errorCorrectionLevel: QRErrorCorrectionLevel) {
    this.typeNumber = typeNumber;
    this.errorCorrectionLevel = errorCorrectionLevel;
  }

  addData(data: string): void {
    const mode = 4; // Byte mode
    this.dataList.push({ mode, data });
    this.dataCache = null;
  }

  isDark(row: number, col: number): boolean {
    if (row < 0 || this.moduleCount <= row || col < 0 || this.moduleCount <= col) {
      throw new Error(row + ',' + col);
    }
    return this.modules[row][col] || false;
  }

  getModuleCount(): number {
    return this.moduleCount;
  }

  make(): void {
    if (this.typeNumber < 1) {
      this.typeNumber = this.getBestTypeNumber();
    }
    this.makeImpl(false, this.getBestMaskPattern());
  }

  private makeImpl(test: boolean, maskPattern: number): void {
    this.moduleCount = this.typeNumber * 4 + 17;
    this.modules = new Array(this.moduleCount);

    for (let row = 0; row < this.moduleCount; row++) {
      this.modules[row] = new Array(this.moduleCount);
      for (let col = 0; col < this.moduleCount; col++) {
        this.modules[row][col] = null;
      }
    }

    this.setupPositionProbePattern(0, 0);
    this.setupPositionProbePattern(this.moduleCount - 7, 0);
    this.setupPositionProbePattern(0, this.moduleCount - 7);
    this.setupPositionAdjustPattern();
    this.setupTimingPattern();
    this.setupTypeInfo(test, maskPattern);

    if (this.typeNumber >= 7) {
      this.setupTypeNumber(test);
    }

    if (this.dataCache == null) {
      this.dataCache = QRCodeModel.createData(
        this.typeNumber,
        this.errorCorrectionLevel,
        this.dataList
      );
    }

    this.mapData(this.dataCache, maskPattern);
  }

  private setupPositionProbePattern(row: number, col: number): void {
    for (let r = -1; r <= 7; r++) {
      if (row + r <= -1 || this.moduleCount <= row + r) continue;

      for (let 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;
        }
      }
    }
  }

  private getBestMaskPattern(): number {
    let minLostPoint = 0;
    let pattern = 0;

    for (let i = 0; i < 8; i++) {
      this.makeImpl(true, i);
      const lostPoint = QRUtil.getLostPoint(this);

      if (i === 0 || minLostPoint > lostPoint) {
        minLostPoint = lostPoint;
        pattern = i;
      }
    }

    return pattern;
  }

  private setupTimingPattern(): void {
    for (let i = 8; i < this.moduleCount - 8; i++) {
      if (this.modules[i][6] != null) continue;
      this.modules[i][6] = i % 2 === 0;
    }

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

  private setupPositionAdjustPattern(): void {
    const pos = QRUtil.getPatternPosition(this.typeNumber);

    for (let i = 0; i < pos.length; i++) {
      for (let j = 0; j < pos.length; j++) {
        const row = pos[i];
        const col = pos[j];

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

        for (let r = -2; r <= 2; r++) {
          for (let c = -2; c <= 2; c++) {
            if (Math.abs(r) === 2 || Math.abs(c) === 2 || (r === 0 && c === 0)) {
              this.modules[row + r][col + c] = true;
            } else {
              this.modules[row + r][col + c] = false;
            }
          }
        }
      }
    }
  }

  private setupTypeNumber(test: boolean): void {
    const bits = QRUtil.getBCHTypeNumber(this.typeNumber);

    for (let i = 0; i < 18; i++) {
      const mod = !test && ((bits >> i) & 1) === 1;
      this.modules[Math.floor(i / 3)][(i % 3) + this.moduleCount - 8 - 3] = mod;
    }

    for (let i = 0; i < 18; i++) {
      const mod = !test && ((bits >> i) & 1) === 1;
      this.modules[(i % 3) + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod;
    }
  }

  private setupTypeInfo(test: boolean, maskPattern: number): void {
    const data = (QRUtil.getErrorCorrectionLevelValue(this.errorCorrectionLevel) << 3) | maskPattern;
    const bits = QRUtil.getBCHTypeInfo(data);

    // vertical
    for (let i = 0; i < 15; i++) {
      const mod = !test && ((bits >> i) & 1) === 1;

      if (i < 6) {
        this.modules[i][8] = mod;
      } else if (i < 7) {
        this.modules[7][8] = mod;
      } else {
        this.modules[this.moduleCount - 15 + i][8] = mod;
      }
    }

    // horizontal
    for (let i = 0; i < 15; i++) {
      const 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;
  }

  private mapData(data: number[], maskPattern: number): void {
    let inc = -1;
    let row = this.moduleCount - 1;
    let bitIndex = 7;
    let byteIndex = 0;

    for (let col = this.moduleCount - 1; col > 0; col -= 2) {
      if (col === 6) col--;

      while (true) {
        for (let c = 0; c < 2; c++) {
          if (this.modules[row][col - c] == null) {
            let dark = false;

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

            const 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;
        }
      }
    }
  }

  private getBestTypeNumber(): number {
    for (let i = 1; i < 40; i++) {
      const rsBlocks = QRUtil.getRSBlocks(i, this.errorCorrectionLevel);
      const buffer = new QRBitBufferImpl();
      let totalDataCount = 0;
      for (let j = 0; j < rsBlocks.length; j++) {
        totalDataCount += rsBlocks[j].dataCount;
      }

      for (let j = 0; j < this.dataList.length; j++) {
        const data = this.dataList[j];
        buffer.put(data.mode, 4);
        buffer.put(data.data.length, QRUtil.getLengthInBits(data.mode, i));
        for (let k = 0; k < data.data.length; k++) {
          buffer.put(data.data.charCodeAt(k), 8);
        }
      }

      if (buffer.length <= totalDataCount * 8) return i;
    }
    return 40;
  }

  static createData(
    typeNumber: number,
    errorCorrectionLevel: QRErrorCorrectionLevel,
    dataList: { mode: QRMode; data: string }[]
  ): number[] {
    const rsBlocks = QRUtil.getRSBlocks(typeNumber, errorCorrectionLevel);
    const buffer = new QRBitBufferImpl();

    for (let i = 0; i < dataList.length; i++) {
      const data = dataList[i];
      buffer.put(data.mode, 4);
      buffer.put(data.data.length, QRUtil.getLengthInBits(data.mode, typeNumber));
      for (let j = 0; j < data.data.length; j++) {
        buffer.put(data.data.charCodeAt(j), 8);
      }
    }

    let totalDataCount = 0;
    for (let i = 0; i < rsBlocks.length; i++) {
      totalDataCount += rsBlocks[i].dataCount;
    }

    if (buffer.length > totalDataCount * 8) {
      throw new Error('code length overflow. (' + buffer.length + '>' + totalDataCount * 8 + ')');
    }

    if (buffer.length + 4 <= totalDataCount * 8) {
      buffer.put(0, 4);
    }

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

    while (true) {
      if (buffer.length >= totalDataCount * 8) break;
      buffer.put(0xec, 8);
      if (buffer.length >= totalDataCount * 8) break;
      buffer.put(0x11, 8);
    }

    return QRCodeModel.createBytes(buffer, rsBlocks);
  }

  static createBytes(buffer: QRBitBuffer, rsBlocks: QRRSBlock[]): number[] {
    let offset = 0;
    let maxDcCount = 0;
    let maxEcCount = 0;
    const dcdata = new Array(rsBlocks.length);
    const ecdata = new Array(rsBlocks.length);

    for (let r = 0; r < rsBlocks.length; r++) {
      const dcCount = rsBlocks[r].dataCount;
      const ecCount = rsBlocks[r].totalCount - dcCount;

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

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

      const rsPoly = QRUtil.getErrorCorrectionPolynomial(ecCount);
      const rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1);
      const modPoly = rawPoly.mod(rsPoly);
      ecdata[r] = new Array(rsPoly.getLength() - 1);
      for (let i = 0; i < ecdata[r].length; i++) {
        const modIndex = i + modPoly.getLength() - ecdata[r].length;
        ecdata[r][i] = modIndex >= 0 ? modPoly.get(modIndex) : 0;
      }
    }

    let totalCodeCount = 0;
    for (let i = 0; i < rsBlocks.length; i++) {
      totalCodeCount += rsBlocks[i].totalCount;
    }

    const data = new Array(totalCodeCount);
    let index = 0;

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

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

    return data;
  }
}

class QRPolynomial {
  num: number[];
  constructor(num: number[], shift: number) {
    let offset = 0;
    while (offset < num.length && num[offset] === 0) {
      offset++;
    }
    this.num = new Array(num.length - offset + shift);
    for (let i = 0; i < num.length - offset; i++) {
      this.num[i] = num[i + offset];
    }
  }
  get(index: number): number {
    return this.num[index];
  }
  getLength(): number {
    return this.num.length;
  }
  multiply(e: QRPolynomial): QRPolynomial {
    const num = new Array(this.getLength() + e.getLength() - 1);
    for (let i = 0; i < this.getLength(); i++) {
      for (let j = 0; j < e.getLength(); j++) {
        num[i + j] ^= QRUtil.gexp(QRUtil.glog(this.get(i)) + QRUtil.glog(e.get(j)));
      }
    }
    return new QRPolynomial(num, 0);
  }
  mod(e: QRPolynomial): QRPolynomial {
    if (this.getLength() - e.getLength() < 0) return this;
    const ratio = QRUtil.glog(this.get(0)) - QRUtil.glog(e.get(0));
    const num = new Array(this.getLength());
    for (let i = 0; i < this.getLength(); i++) {
      num[i] = this.get(i);
    }
    for (let i = 0; i < e.getLength(); i++) {
      num[i] ^= QRUtil.gexp(QRUtil.glog(e.get(i)) + ratio);
    }
    return new QRPolynomial(num, 0).mod(e);
  }
}

class QRRSBlock {
  totalCount: number;
  dataCount: number;
  constructor(totalCount: number, dataCount: number) {
    this.totalCount = totalCount;
    this.dataCount = dataCount;
  }
  static getRSBlocks(typeNumber: number, errorCorrectionLevel: QRErrorCorrectionLevel): QRRSBlock[] {
    const list = QRRSBlock.getRsBlockTable(typeNumber, errorCorrectionLevel);
    if (list == null) {
      throw new Error('bad rs block @ typeNumber:' + typeNumber + '/errorCorrectionLevel:' + errorCorrectionLevel);
    }
    const length = list.length / 3;
    const rsBlocks: QRRSBlock[] = [];
    for (let i = 0; i < length; i++) {
      const count = list[i * 3 + 0];
      const totalCount = list[i * 3 + 1];
      const dataCount = list[i * 3 + 2];
      for (let j = 0; j < count; j++) {
        rsBlocks.push(new QRRSBlock(totalCount, dataCount));
      }
    }
    return rsBlocks;
  }
  static getRsBlockTable(typeNumber: number, errorCorrectionLevel: QRErrorCorrectionLevel): number[] | null {
    switch (errorCorrectionLevel) {
      case 'L': return QRRSBlock.rsBlockTableL[typeNumber - 1];
      case 'M': return QRRSBlock.rsBlockTableM[typeNumber - 1];
      case 'Q': return QRRSBlock.rsBlockTableQ[typeNumber - 1];
      case 'H': return QRRSBlock.rsBlockTableH[typeNumber - 1];
      default: return null;
    }
  }

  static rsBlockTableL = [
    [1, 26, 19], [1, 44, 34], [1, 70, 55], [1, 100, 80], [1, 134, 108], [2, 86, 68], [2, 98, 78], [2, 121, 97], [2, 146, 116], [2, 192, 156],
    [2, 259, 213], [2, 332, 274], [4, 193, 159], [2, 339, 279], [2, 423, 349], [4, 311, 255], [4, 415, 341], [4, 535, 439], [4, 603, 497], [4, 666, 548]
  ];
  static rsBlockTableM = [
    [1, 26, 16], [1, 44, 28], [1, 70, 44], [2, 50, 32], [2, 64, 48], [4, 43, 27], [4, 49, 31], [4, 60, 38], [4, 73, 46], [4, 96, 60],
    [4, 119, 74], [4, 137, 86], [4, 155, 98], [4, 177, 110], [6, 155, 95], [6, 193, 119], [6, 230, 142], [6, 253, 156], [7, 283, 177], [8, 341, 213]
  ];
  static rsBlockTableQ = [
    [1, 26, 13], [1, 44, 22], [2, 35, 17], [2, 50, 24], [2, 81, 43], [4, 50, 26], [6, 50, 26], [6, 53, 29], [8, 61, 31], [8, 72, 36],
    [8, 91, 45], [10, 93, 46], [12, 107, 53], [12, 115, 54], [12, 131, 62], [14, 151, 71], [14, 175, 83], [16, 211, 100], [18, 239, 113], [21, 270, 128]
  ];
  static rsBlockTableH = [
    [1, 26, 9], [1, 44, 16], [2, 35, 13], [4, 25, 9], [2, 33, 15], [4, 24, 11], [4, 28, 13], [4, 33, 15], [4, 39, 17], [4, 45, 19],
    [4, 58, 25], [6, 69, 29], [6, 74, 31], [8, 86, 36], [10, 95, 39], [12, 116, 48], [14, 140, 58], [16, 168, 70], [17, 197, 83], [19, 224, 94]
  ];
}

const QRUtil = {
  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]
  ],
  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),

  getBCHTypeInfo(data: number): number {
    let 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;
  },
  getBCHTypeNumber(data: number): number {
    let 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;
  },
  getBCHDigit(data: number): number {
    let digit = 0;
    while (data !== 0) {
      digit++;
      data >>>= 1;
    }
    return digit;
  },
  getPatternPosition(typeNumber: number): number[] {
    return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1];
  },
  getMask(maskPattern: number, i: number, j: number): boolean {
    switch (maskPattern) {
      case 0: return (i + j) % 2 === 0;
      case 1: return i % 2 === 0;
      case 2: return j % 3 === 0;
      case 3: return (i + j) % 3 === 0;
      case 4: return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 === 0;
      case 5: return ((i * j) % 2) + ((i * j) % 3) === 0;
      case 6: return (((i * j) % 2) + ((i * j) % 3)) % 2 === 0;
      case 7: return (((i * j) % 3) + ((i + j) % 2)) % 2 === 0;
      default: throw new Error('bad maskPattern:' + maskPattern);
    }
  },
  getErrorCorrectionPolynomial(errorCorrectionLength: number): QRPolynomial {
    let a = new QRPolynomial([1], 0);
    for (let i = 0; i < errorCorrectionLength; i++) {
      a = a.multiply(new QRPolynomial([1, QRUtil.gexp(i)], 0));
    }
    return a;
  },
  getLengthInBits(mode: QRMode, type: number): number {
    if (1 <= type && type < 10) {
      switch (mode) {
        case 1: return 10;
        case 2: return 9;
        case 4: return 8;
        case 8: return 8;
        default: throw new Error('mode:' + mode);
      }
    } else if (type < 27) {
      switch (mode) {
        case 1: return 12;
        case 2: return 11;
        case 4: return 16;
        case 8: return 10;
        default: throw new Error('mode:' + mode);
      }
    } else if (type < 41) {
      switch (mode) {
        case 1: return 14;
        case 2: return 13;
        case 4: return 16;
        case 8: return 12;
        default: throw new Error('mode:' + mode);
      }
    } else {
      throw new Error('type:' + type);
    }
  },
  getLostPoint(qrCode: QRCodeModel): number {
    const moduleCount = qrCode.getModuleCount();
    let lostPoint = 0;

    for (let row = 0; row < moduleCount; row++) {
      for (let col = 0; col < moduleCount; col++) {
        let sameCount = 0;
        const dark = qrCode.isDark(row, col);

        for (let r = -1; r <= 1; r++) {
          if (row + r < 0 || moduleCount <= row + r) continue;
          for (let c = -1; c <= 1; c++) {
            if (col + c < 0 || moduleCount <= col + c) continue;
            if (r === 0 && c === 0) continue;
            if (dark === qrCode.isDark(row + r, col + c)) {
              sameCount++;
            }
          }
        }
        if (sameCount > 5) {
          lostPoint += 3 + sameCount - 5;
        }
      }
    }

    for (let row = 0; row < moduleCount - 1; row++) {
      for (let col = 0; col < moduleCount - 1; col++) {
        let count = 0;
        if (qrCode.isDark(row, col)) count++;
        if (qrCode.isDark(row + 1, col)) count++;
        if (qrCode.isDark(row, col + 1)) count++;
        if (qrCode.isDark(row + 1, col + 1)) count++;
        if (count === 0 || count === 4) {
          lostPoint += 3;
        }
      }
    }

    for (let row = 0; row < moduleCount; row++) {
      for (let col = 0; col < moduleCount - 6; col++) {
        if (
          qrCode.isDark(row, col) &&
          !qrCode.isDark(row, col + 1) &&
          qrCode.isDark(row, col + 2) &&
          qrCode.isDark(row, col + 3) &&
          qrCode.isDark(row, col + 4) &&
          !qrCode.isDark(row, col + 5) &&
          qrCode.isDark(row, col + 6)
        ) {
          lostPoint += 40;
        }
      }
    }

    for (let col = 0; col < moduleCount; col++) {
      for (let row = 0; row < moduleCount - 6; row++) {
        if (
          qrCode.isDark(row, col) &&
          !qrCode.isDark(row + 1, col) &&
          qrCode.isDark(row + 2, col) &&
          qrCode.isDark(row + 3, col) &&
          qrCode.isDark(row + 4, col) &&
          !qrCode.isDark(row + 5, col) &&
          qrCode.isDark(row + 6, col)
        ) {
          lostPoint += 40;
        }
      }
    }

    let darkCount = 0;
    for (let col = 0; col < moduleCount; col++) {
      for (let row = 0; row < moduleCount; row++) {
        if (qrCode.isDark(row, col)) {
          darkCount++;
        }
      }
    }
    const ratio = Math.abs((100 * darkCount) / moduleCount / moduleCount - 50) / 5;
    lostPoint += ratio * 10;

    return lostPoint;
  },

  getErrorCorrectionLevelValue(level: QRErrorCorrectionLevel): number {
    switch (level) {
      case 'L': return 1;
      case 'M': return 0;
      case 'Q': return 3;
      case 'H': return 2;
      default: throw new Error('level:' + level);
    }
  },

  getRSBlocks(typeNumber: number, errorCorrectionLevel: QRErrorCorrectionLevel): QRRSBlock[] {
    return QRRSBlock.getRSBlocks(typeNumber, errorCorrectionLevel);
  },

  EXP_TABLE: new Array(256),
  LOG_TABLE: new Array(256),

  gexp(n: number): number {
    while (n < 0) n += 255;
    while (n >= 256) n -= 255;
    return QRUtil.EXP_TABLE[n];
  },

  glog(n: number): number {
    if (n < 1) throw new Error('glog(' + n + ')');
    return QRUtil.LOG_TABLE[n];
  }
};

let v = 1;
for (let i = 0; i < 255; i++) {
  QRUtil.EXP_TABLE[i] = v;
  QRUtil.LOG_TABLE[v] = i;
  v <<= 1;
  if (v & 0x100) {
    v ^= 0x11d;
  }
}
QRUtil.EXP_TABLE[255] = QRUtil.EXP_TABLE[0];

class QRBitBufferImpl implements QRBitBuffer {
  buffer: number[] = [];
  length: number = 0;
  get(index: number): boolean {
    const bufIndex = Math.floor(index / 8);
    return ((this.buffer[bufIndex] >>> (7 - (index % 8))) & 1) === 1;
  }
  put(num: number, length: number): void {
    for (let i = 0; i < length; i++) {
      this.putBit(((num >>> (length - i - 1)) & 1) === 1);
    }
  }
  putBit(bit: boolean): void {
    const 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++;
  }
}