class mainScene {

  preload() {
      this.load.image('sky', 'assets/fond.png');
      this.load.image('actor', 'assets/player.png');
      this.load.image('ennemy', 'assets/mechant.png');
      this.load.audio('asteroid', 'assets/asteroid.mp3', {
          instances: 1 });
  }

  create() {
      this.sky = this.add.sprite(200, 300, 'sky');

      this.actor = this.physics.add.sprite(200, 500, 'actor');

      this.ennemy = this.physics.add.sprite(200, 100, 'ennemy');
      this.ennemy2 = this.physics.add.sprite(300, 100, 'ennemy');
      this.ennemy3 = this.physics.add.sprite(400, 100, 'ennemy');
      this.ennemy4 = this.physics.add.sprite(100, 100, 'ennemy');

      this.sound.add('asteroid');


      this.score = 100;
      const style = { font: '20px Arial', fill: '#fff' };
      this.scoreText = this.add.text(20, 20, 'Score : ' + this.score, style);
  }

  update() {
      this.arrow = this.input.keyboard.createCursorKeys();

      if (this.arrow.right.isDown)
          this.actor.x += 4;
      else if (this.arrow.left.isDown)
          this.actor.x -= 4;

      this.ennemy.y += 6;
      this.ennemy2.y += 6;
      this.ennemy3.y += 6;
      this.ennemy4.y += 6;

      this.ennemy.x += 0.4;
      this.ennemy2.x -= 0.4;
      this.ennemy3.x += 0.4;
      this.ennemy4.x -= 0.4;


      if (this.physics.overlap(this.actor, this.ennemy) ||
         this.physics.overlap(this.actor, this.ennemy2) ||
         this.physics.overlap(this.actor, this.ennemy3) ||
         this.physics.overlap(this.actor, this.ennemy4))
        this.score = 0;

      if (this.ennemy.y >= 550) {
          this.score += 10;
          this.ennemy.y = 100;
          this.ennemy2.y = 100;
          this.ennemy3.y = 100;
          this.ennemy4.y = 100;
      }

      this.sound.play('asteroid');

      this.scoreText.setText('Score : ' + this.score);
  }

}

new Phaser.Game({
  width: 400,
  height: 600,
  scene: mainScene,
  physics: { default: 'arcade' },
  parent: 'game',
});