module.exports = class {
  constructor(titles) {
    this._rows = [titles];
    this._widths = [];
    for (let i = 0; i < this._rows.length; i++) {
      for (let _i = 0; _i < this._rows[i].length; _i++) {
        this._widths.push(this._rows[i][_i].length + 2);
      }
    }
  }

  _updateWidth(row) {
    for (const index in row) {
      const entry = row[index];
      const width = entry.length + 2;
      if (width > this._widths[index]) {
        this._widths[index] = width;
      }
    }
  }

  addRow(row) {
    this._rows.push(row);
    this._updateWidth(row);
  }

  render() {
    function drawRow(ctx, row, index) {
      const columns = [];

      for (let i = 0; i < row.length; i++) {
        columns.push(row[i].toString().padEnd(ctx._widths[i]));
      }

      return columns;
    }

    const toDraw = [];
    const queue = this._rows.splice(1);
    for (const row in queue) {
      const _row = drawRow(this, queue[row]);
      toDraw.push(_row.join("|"));
    }

    this._updateWidth(this._rows[0]);

    const trows = [];
    for (const index in this._rows[0]) {
      const field = this._rows[0][index];
      let out = field;
      const width = this._widths[index];
      out = out.padEnd(width);
      trows.push(out);
    }

    const title_row = trows.join("|");

    let seperator_row = "";
    for (const index in this._widths) {
      seperator_row += "-".repeat(this._widths[index]);
      if (index != this._widths.length - 1) {
        seperator_row += "+";
      }
    }

    const drawn = [title_row, seperator_row];
    for (const index in toDraw) {
      drawn.push(toDraw[index]);
    }

    return drawn.join("\n");
  }
};