let config = {
	type: Phaser.AUTO,
	width: 800,
	height: 600,
	scene: {
		preload: preload,
		create: create,
		update: update
	}
};

let game = new Phaser.Game(config);

let that;
let shoot;
let win;
let graphics;
let rect;
let viruses = [];
let target;
let maxEnemies = 20;
let enemiesCount = maxEnemies;
let enemiesText;
let colors = ['bleu', 'rouge', 'vert'];

function preload() {
	that = this;
	this.load.audio('shoot', [ 'sound/shoot.ogg', 'sound/shoot.mp3' ]);
	this.load.audio('win', [ 'sound/win.ogg', 'sound/win.mp3' ]);
	this.load.image('target', 'img/target.png');
	this.load.image('bleu', 'img/virus-bleu.png');
	this.load.image('rouge', 'img/virus-rouge.png');
	this.load.image('vert', 'img/virus-vert.png');
	this.load.image('bg', 'img/bg.png');
}

function killVirus(player, virus) {
	virus.visible = false;
	--enemiesCount;
	enemiesText.setText('virus restant : '+enemiesCount);
	if (enemiesCount === 0) {
		enemiesText.visible = false;
		that.add.text(200, 250, 'Bonne annnée 2021 !', { fontSize: '32px', fill: '#000' });
		that.add.text(250, 300, 'Si possible, sans virus', { fontSize: '14px', fill: '#000' });
		win.play();
	}
}

function getRandomInt(max) {
	return Math.floor(Math.random() * Math.floor(max));
}

function create() {
	this.add.image(400, 300, 'bg');
	
	shoot = this.sound.add('shoot');
	win = this.sound.add('win');
	
	enemiesText = this.add.text(16, 16, 'virus restant : '+maxEnemies, { fontSize: '32px', fill: '#000' });
	
	graphics = this.add.graphics();
	
	viruses = new Array(maxEnemies).fill(null).map(
		function() {
			let color = colors[Math.floor(Math.random() * colors.length)];
			return that.add.image(getRandomInt(800), getRandomInt(600), color);
		}
	);
	
	rect = Phaser.Geom.Rectangle.Clone(this.cameras.main);
	
	target = this.add.image(400, 300, 'target');
	
	this.input.on('pointermove', function (pointer) {
		target.x = pointer.x;
		target.y = pointer.y;
	});
	
	this.input.on('pointerdown', function (pointer) {
		let pointerX = pointer.x;
		let pointerY = pointer.y;
		shoot.play();
		for (let i = 0; i < maxEnemies; i++) {
			let virus = viruses[i];
			let virusX = virus.x;
			let virusY = virus.y;
			if (
				virus.visible &&
				pointerX >= virusX - 94 && pointerX <= virusX + 94 &&
				pointerY >= virusY - 94 && pointerY <= virusY + 94
			) {
				killVirus(null, virus);
				break;
			}
		}
	}, this);
}

function update() {
	viruses.forEach(function (virus, i) {
		let direction = getRandomInt(4);
		let x = (1 + Math.random() * i);
		let y = (1 + Math.random() * i);
		switch (direction) {
			case 1:
				virus.x += x;
				virus.y += y;
				break;
			case 2:
				virus.x += x;
				virus.y -= y;
				break;
			case 3:
				virus.x -= x;
				virus.y += y;
				break;
			case 4:
				virus.x -= x;
				virus.y -= y;
				break;
		}
		
	});
	
	Phaser.Actions.WrapInRectangle(viruses, rect, 72);
}