class Formatter {
  private str: string;
  private width: number;
  private remainingSpace: number;

  public alignLeft() : void {
    this.str = this.str + ' '.repeat(this.remainingSpace);
  }

  public alignRight() : void {
    this.str = ' '.repeat(this.remainingSpace) + this.str;
  }

  public alignCenter() : void {
    let diff = (this.width - this.str.length) / 2;
    let leftPadding = Math.floor(diff);
    let rightPadding = Math.ceil(diff);
    this.str = ' '.repeat(leftPadding) + this.str + ' '.repeat(rightPadding);
  }

  public wrap() : void {
    this.str = this.str.substr(0, this.width - 3) + '...';
  }

  public workWithTheString(str: string) : void {
    this.str = str;
  }

  public theMaximumWidthIs(width: number) : void {
    this.width = width;
    this.remainingSpace = this.width - this.str.length;
  }

  public giveMeTheResult() : string {
    return this.str;
  }
}

export function table(data: Array<Array<string>>, config: any) {
  let formatter = new Formatter();
  let formattedRows = [];

  for(let row in data) {
    for(let column in data[row]) {
      if(!config[column]) throw `Column ${column} not specified in config.`;

      formatter.workWithTheString(data[row][column]);
      formatter.theMaximumWidthIs(config[column].width);

      if(data[row][column].length <= config[column].width)
        switch (config[column].align) {
          case 'left': formatter.alignLeft(); break;
          case 'right': formatter.alignRight(); break;
          case 'center': formatter.alignCenter(); break;
          default: formatter.alignLeft(); break;
        }
      else formatter.wrap();

      data[row][column] = formatter.giveMeTheResult();
    }
    formattedRows.push(data[row].join(''));
  }
  return formattedRows.join('\n');
}