var clicked,
    pressed,
    keys = {};
mousePressed = function() {
    clicked = true;
};
mouseReleased = function() {
    clicked = false;
};
keyPressed = function() {
    keys[keyCode] = true;
    pressed = true;
};
keyReleased = function() {
    delete keys[keyCode];
    pressed = false;
};

var Icon = function(sprite) {
    this.sprite = sprite;
};
Icon.prototype.loadSprite = function() {
    (background)(0, 0);
    this.sprite = this.sprite();
};

var App = function(icon) {
    this.icon = new Icon(icon);
    this.active = false;
    this.focused = false;
};

var ChatApp = function() {
    App.call(function() {
        fill(0, 200, 150);
        rect(25, 25, 25, 25);

        return get(0, 0, 100, 100);
    });
};
ChatApp.prototype = Object.create(App.prototype);
ChatApp.prototype.init = function() {
    //
};
ChatApp.prototype.launch = function() {
    this.active = true;
};
ChatApp.prototype.exit = function() {
    this.active = false;
};
ChatApp.prototype.focus = function() {
    this.focused = true;
};
ChatApp.prototype.unFocus = function() {
    this.focused = false;
};
ChatApp.prototype.update = function() {
    if(!this.active) {
        return;
    }
    if(!this.focused) {
        return;
    }
};
ChatApp.prototype.display = function() {
    if(!this.focused) {
        return;
    }
};

var OS = function() {
    this.apps = {};
    this.activeApps = {};
    this.accounts = {
        admin: {
            username: 'admin',
            password: 'admin',
            settings: {
                theme: 'default'
            }
        }
    };
    if(this.loadImages()) {
        this.init();
    }
};

OS.prototype.loadImages = function() {
    // Load images here
    return true;
};

OS.prototype.init = function() {
    // Launch EOS
    for(var app in this.apps) {
        this.apps[app].init();
    }
};

OS.prototype.update = function() {
    for(var app in this.activeApps) {
        this.activeApps[app].update();
    }
};

var EOS = new OS();

var draw = function() {
    EOS.update();
};