html, body {
  height: 100%;
}
body {
  overflow-x: hidden;
  background: black;
}

/* 
SANTA ON THE RUN
Uses phaser.js https://phaser.io
♥
*/

// FULL mode is best for phones https://codepen.io/natewiley/full/gbwWMX

(function(){

var width = window.innerWidth;
var height = window.innerHeight > 480 ? 480 : window.innerHeight;
var gameScore = 0;
var highScore = 0;

var SantaGame = {

  init: function(){

    this.game = new Phaser.Game(width, height, Phaser.CANVAS, '');
    this.game.state.add("load", this.load);
    this.game.state.add("play", this.play);
    this.game.state.add("title", this.title);
    this.game.state.add("gameOver", this.gameOver);
    this.game.state.add("instructions", this.instructions);
    this.game.state.start("load");

  },

  load: {
    preload: function(){
      this.game.load.audio('drivin-home', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/drivin-home-low.mp3');
      this.game.load.audio('ho-ho-ho', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/ho-ho-ho.mp3');
      this.game.load.audio('hop', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/jump-sound.mp3');
      this.game.load.image('platform', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/ground.png');
      this.game.load.spritesheet('santa-running', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/santa-running.png', 37, 52);
      this.game.load.image('snow-bg', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/snow-bg.png');
      this.game.load.image('snowflake', 'https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/snowflake.png');
      this.game.load.image("logo", "https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/game-logo.png");
      this.game.load.image("instructions", "https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/instructions.png");
      this.game.load.image("game-over", "https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/game-over.png");
      this.game.load.image("startbtn", "https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/start-btn.png");
      this.game.load.image("playbtn", "https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/play-btn.png");
      this.game.load.image("restartBtn", "https://s3-us-west-2.amazonaws.com/s.cdpn.io/74196/restart-btn.png");
    },
    create: function(){
      this.game.state.start("title");
    }
  },


  // title screen

  title: {
    
    create: function(){
      this.bg = this.game.add.tileSprite(0, 0, width, height, 'snow-bg');
      this.logo = this.game.add.sprite(this.game.world.width/2 - 158, 20, 'logo');
      this.logo.alpha = 0;
      this.game.add.tween(this.logo).to({alpha: 1}, 1000, Phaser.Easing.Linear.None, true, 0);
      this.startBtn = this.game.add.button(this.game.world.width/2 - 159, this.game.world.height - 120, 'startbtn', this.startClicked);
      this.startBtn.alpha = 0;
      this.game.add.tween(this.startBtn).to({alpha: 1}, 1000, Phaser.Easing.Linear.None, true, 1000);
    },

    startClicked: function(){
      this.game.state.start("instructions");
    },

  },

// instructions screen
  instructions: {
    
    create: function(){
      this.bg = this.game.add.tileSprite(0, 0, width, height, 'snow-bg');
      this.instructions = this.game.add.sprite(this.game.world.width/2 - 292, 30, 'instructions');
      this.instructions.alpha = 0;
      this.game.add.tween(this.instructions).to({alpha: 1}, 800, Phaser.Easing.Linear.None, true, 0);
      this.playBtn = this.game.add.button(this.game.world.width/2 - 159, this.game.world.height - 120, 'playbtn', this.playClicked);
      this.playBtn.alpha = 0;
      this.game.add.tween(this.playBtn).to({alpha: 1}, 800, Phaser.Easing.Linear.None, true, 800);
    },

    playClicked: function(){
      this.game.state.start("play");
    },
  },

  // playing
  play: {

      create: function(){
          highScore = gameScore > highScore ? Math.floor(gameScore) : highScore;
        gameScore = 0; 
        this.currentFrame = 0;
        this.particleInterval = 2 * 60;
        this.gameSpeed = 580;
        this.isGameOver = false;
        this.game.physics.startSystem(Phaser.Physics.ARCADE);

        this.music = this.game.add.audio("drivin-home");
        this.music.loop = true;
        this.music.play();

        this.bg = this.game.add.tileSprite(0, 0, width, height, 'snow-bg');
        this.bg.fixedToCamera = true;
        this.bg.autoScroll(-this.gameSpeed / 6, 0);

        this.emitter = this.game.add.emitter(this.game.world.centerX, -32, 50);

        this.platforms = this.game.add.group();
        this.platforms.enableBody = true;
        this.platforms.createMultiple(5, 'platform', 0, false);
        this.platforms.setAll('anchor.x', 0.5);
        this.platforms.setAll('anchor.y', 0.5);

        var plat;

        for(var i=0; i<5; i++){
          plat = this.platforms.getFirstExists(false);
          plat.reset(i * 192, this.game.world.height - 24);
          plat.width = 192;
          plat.height = 24;
          this.game.physics.arcade.enable(plat);
          plat.body.immovable = true;
          plat.body.bounce.set(0);
        }

        this.lastPlatform = plat;

        this.santa = this.game.add.sprite(100, this.game.world.height - 200, 'santa-running');
        this.santa.animations.add("run");
        this.santa.animations.play('run', 20, true);

        this.game.physics.arcade.enable(this.santa);

        this.santa.body.gravity.y = 1500;
        this.santa.body.collideWorldBounds = true;
        
        this.emitter.makeParticles('snowflake');
        this.emitter.maxParticleScale = .02;
        this.emitter.minParticleScale = .001;
        this.emitter.setYSpeed(100, 200);
        this.emitter.gravity = 0;
        this.emitter.width = this.game.world.width * 1.5;
        this.emitter.minRotation = 0;
        this.emitter.maxRotation = 40;

        this.game.camera.follow(this.santa);
        this.cursors = this.game.input.keyboard.createCursorKeys();
        
        this.spacebar = this.game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);
        this.emitter.start(false, 0, 0);
        this.score = this.game.add.text(20, 20, '', { font: "24px Arial", fill: "white", fontWeight: "bold" });
        
          if(highScore > 0){
            this.highScore = this.game.add.text(20, 45, 'Best: ' + highScore, { font: "18px Arial", fill: "white" });
          }
          
      },

      update: function(){
        var that = this;
        if(!this.isGameOver){
          gameScore += .5;
            this.gameSpeed += .03;
          this.score.text = 'Score: ' + Math.floor(gameScore);
             
          this.currentFrame++;
          var moveAmount = this.gameSpeed / 100;
          this.game.physics.arcade.collide(this.santa, this.platforms);

          if(this.santa.body.bottom >= this.game.world.bounds.bottom){
            this.isGameOver = true;
            this.endGame();
            
          }

          if(this.cursors.up.isDown && this.santa.body.touching.down || this.spacebar.isDown && this.santa.body.touching.down || this.game.input.mousePointer.isDown && this.santa.body.touching.down || this.game.input.pointer1.isDown && this.santa.body.touching.down){
            this.jumpSound = this.game.add.audio("hop");
            this.jumpSound.play();
            this.santa.body.velocity.y = -500;
          }


          if(this.particleInterval === this.currentFrame){
            this.emitter.makeParticles('snowflake');
            this.currentFrame = 0;
          }

          this.platforms.children.forEach(function(platform) {
            platform.body.position.x -= moveAmount;
            if(platform.body.right <= 0){
              platform.kill();
              var plat = that.platforms.getFirstExists(false);
              plat.reset(that.lastPlatform.body.right + 192, that.game.world.height - (Math.floor(Math.random() * 50)) - 24);
              plat.body.immovable = true;
              that.lastPlatform = plat;
            }
          });

        }
        
      },


      endGame: function(){
        this.music.stop();
        this.music = this.game.add.audio("ho-ho-ho");
        this.music.play();
        this.game.state.start("gameOver");
      }


  },
  gameOver: {

    create: function(){
      this.bg = this.game.add.tileSprite(0, 0, width, height, 'snow-bg');
      this.msg = this.game.add.sprite(this.game.world.width/2 - 280.5, 50, 'game-over');
      this.msg.alpha = 0;
      this.game.add.tween(this.msg).to({alpha: 1}, 600, Phaser.Easing.Linear.None, true, 0);

      this.score = this.game.add.text(this.game.world.width/2 - 100, 200, 'Score: ' + Math.floor(gameScore), { font: "42px Arial", fill: "white" });
      this.score.alpha = 0;
      this.game.add.tween(this.score).to({alpha: 1}, 600, Phaser.Easing.Linear.None, true, 600);

      this.restartBtn = this.game.add.button(this.game.world.width/2 - 183.5, 280, 'restartBtn', this.restartClicked);
      this.restartBtn.alpha = 0;
      this.game.add.tween(this.restartBtn).to({alpha: 1}, 600, Phaser.Easing.Linear.None, true, 1000);
    },

    restartClicked: function(){
      this.game.state.start("play");
    },
  }

};

SantaGame.init();
  
})();