solution kata tennis refacto

tennisGame1.ts

import { TennisGame } from './TennisGame';


export class TennisGame1 implements TennisGame {
  private scoreForPlayer1: number = 0;
  private scoreForPlayer2: number = 0;
  private player1Name: string;
  private player2Name: string;
  private score: string = '';
  private normalPoints: string[] = [
    'Love',
    'Fifteen',
    'Thirty',
    'Forty',
  ];

  constructor(player1Name: string, player2Name: string) {
    this.player1Name = new Player(player1Name).getName();
    this.player2Name = new Player(player2Name).getName();
  }

  wonPoint(playerName: string): void {
    if (playerName === 'player1') {
      this.scoreForPlayer1 += 1;
    }
    else {
      this.scoreForPlayer2 += 1;
    }
  }

  getScore(): string {
    const isSameScore: boolean = this.scoreForPlayer1 === this.scoreForPlayer2;
    const isLateGame: boolean = this.scoreForPlayer1 >= 4 || this.scoreForPlayer2 >= 4;

    if (isSameScore) {
      this.sameScore();
    }
    else if (isLateGame) {
      this.scoreForLateGame();
    }
    else {
      this.scoreForEarlyGame();
    }

    return this.score;
  }

  scoreForLateGame(): void {
    const scoreDifference: number = this.scoreForPlayer1 - this.scoreForPlayer2;
    const scoreDifferenceToWin: number = 2;

    if (scoreDifference === 1) {
      this.score = 'Advantage player1';
    }
    else if (scoreDifference === -1) {
      this.score = 'Advantage player2';
    }
    else if (scoreDifference >= scoreDifferenceToWin) {
      this.score = 'Win for player1';
    }
    else {
      this.score = 'Win for player2';
    }
  }

  scoreForEarlyGame(): void {
    this.score = `${this.normalPoints[this.scoreForPlayer1]}-${this.normalPoints[this.scoreForPlayer2]}`;
  }

  sameScore(): void {
    const isOverOrEqualToThirdPoint: boolean = this.scoreForPlayer1 >= 3;

    if (isOverOrEqualToThirdPoint) {
      // Deuce = 40-40
      this.score = 'Deuce';
    }
    else {
      this.score = `${this.normalPoints[this.scoreForPlayer1]}-All`;
    }
  }
}

class Player {
  private name: string;

  constructor(name) {
    this.name = name;
  }

  getName() {
    return this.name;
  }
}