var restart;
var player;
var enemy;
var platforms;
var cursors;
var dead = false;

var diamond;
var stars;
var score = 0;
var scoreText;

var game = new Phaser.Game( 800, 600, Phaser.AUTO, '' );
game.state.add( 'load', load );
game.state.add( 'play', play );
game.state.start( 'load' );

var load = function(game){};

load.prototype = {
    preload : function(){
        game.load.image( 'sky', 'assets/img/sky.png');
        game.load.image( 'ground', 'assets/img/platform.png');
        game.load.image( 'star', 'assets/img/star.png');
        game.load.spritesheet( 'dude', 'assets/img/dude.png', 32, 48 );
        game.load.spritesheet( 'enemy', 'assets/img/baddie.png', 32, 32 );
        game.load.image( 'diamond', 'assets/img/diamond.png');
        game.state.start( 'StateB' );
    }

}

var play = function(game){};

play.prototype = {
    create : function(){
        restart = game.input.keyboard.addKey( Phaser.Keyboard.R );
        game.physics.startSystem( Phaser.Physics.ARCADE );
        game.add.sprite( 0, 0, 'sky' );
        scoreText = game.add.text( 32, 16, 'score: 0', { fontSize : '24px', fill : '#000' } );

        //platforms
        platforms = game.add.group();
        platforms.enableBody = true;
        var ground = platforms.create( 0, game.world.height - 64, 'ground' );
        ground.scale.setTo( 2, 2 );
        ground.body.immovable = true;
        var ledge = platforms.create( 400, 400, 'ground' );
        ledge.body.immovable = true;
        ledge = platforms.create( -150, 250, 'ground' );
        ledge.body.immovable = true;

        //player
        player = game.add.sprite( 32, game.world.height - 150, 'dude' );
        game.physics.arcade.enable( player );
        player.body.bounce.y = 0.1;
        player.body.gravity.y = 300;
        player.body.collideWorldBounds = true;
        player.animations.add( 'left', [0, 1, 2, 3], 15, true );
        player.animations.add( 'right', [5, 6, 7, 8], 15, true );

        //enemy
        enemy = game.add.sprite( 700, game.world.height - 150, 'enemy' );
        game.physics.arcade.enable( enemy );
        enemy.body.gravity.y = 300;
        enemy.body.bounce.y = 0.1;
        enemy.frame = 1;

        // diamond
        diamond = game.add.sprite( 760, game.world.height - 150, 'diamond' );
        game.physics.arcade.enable( diamond );
        diamond.body.gravity.y = 300;
        diamond.body.bounce.y = 0.1;

        //stars
        stars = game.add.group();
        stars.enableBody = true;

        for( var i = 15; i < 800; i += 80 ){
            var star = stars.create( i, 0, 'star' );
            star.body.gravity.y = 100;
            star.body.bounce.y = 0.5 + Math.random() * 0.2
        }

        //input
        cursors = game.input.keyboard.createCursorKeys();
    },
    update : function(){
        game.physics.arcade.collide( player, platforms );
        game.physics.arcade.collide( enemy, platforms );
        game.physics.arcade.collide( stars, platforms );
        game.physics.arcade.collide( diamond, platforms );

        game.physics.arcade.overlap( player, stars, collectStar, null, this );
        game.physics.arcade.overlap( player, enemy, death, null, this );
        game.physics.arcade.overlap( player, diamond, pickup, null, this );

        if( dead == true ){
            player.destroy();
            diamond.destroy();
            stars.destroy();
            enemy.destroy();
            game.add.text( 300, 250, 'GAME OVER', { fontSize : '80px', fill : '#000' } );
            game.add.text( 300, 310, 'push R to restart', { fontSize : '20px', fill : '#000' } );
            if( restart.isDown ){
                game.state.start( 'play' );
            }
        }else{
            player.body.velocity.x = 0;
            player.body.gravity.y = 300;

            if( cursors.left.isDown ){
                player.body.velocity.x = -150;
                player.animations.play( 'left' );
            }
            else if( cursors.right.isDown ){
                player.body.velocity.x = 150;
                player.animations.play( 'right' );
            }
            else{
                player.animations.stop();
                player.frame = 4;
            }
            if( cursors.down.isDown ){
                player.body.gravity.y = 800;
            }

            if( cursors.up.isDown && player.body.touching.down ){
                player.body.velocity.y = -310;
            }
        }
    },
    collectStar : function( player, star ){
        star.destroy();
        score += 10;
        scoreText.text = 'score: ' + score;
    },
    death : function( player, enemy ){
        player.body.velocity.x = 0;
        dead = true;
    },
    pickup : function( player, diamond ){
        diamond.destroy();
        score += 100;
        scoreText.text = 'score: ' + score;
    }
};