/**
 * Simon
 * Nicholas Wright (http://www.nicholaswright.org/games/simon)
 * Created 12 / 05 / 2006
 */
function SimonElement( strClass ) {
    this.strClass = strClass;
    this.objNode = $( strClass );
    this.boolPlaying = false;
    this.intPlayTime = 100;
    this.lolite();
}

SimonElement.prototype = {
    togglePlaying: function() {
        this.boolPlaying = ! this.boolPlaying;
    },
    hilite: function() {
        this.objNode.className = this.strClass + "_" + "hilite";
    },
    lolite: function() {
        this.objNode.className = this.strClass;
    },
    play: function() {
        if (! this.boolPlaying) {
            setTimeout( ( function() { this.play() } ).bind( this ), this.intPlayTime );
            this.hilite();
            this.togglePlaying();
        } else {
            this.lolite();
            this.togglePlaying();
        }
    }
};

function Simon() {
    this.objYellow = new SimonElement( 'simon_yellow' );
    this.objGreen = new SimonElement( 'simon_green' );
    this.objBlue = new SimonElement( 'simon_blue' );
    this.objRed = new SimonElement( 'simon_red' );
    this.arrayObjects = [ this.objYellow, this.objGreen, this.objBlue, this.objRed ];
    this.arrayEvents = [];
}

Simon.prototype = {
    reset: function() {
        this.stopObserving();
        this.arraySequence = [];
        this.intIndex = 0;
        this.playSequence();
    },
    correctMove: function( intMove ) {
        if (this.arraySequence[ this.intIndex ] == intMove) {
            this.intIndex++;
            this.arrayObjects[ intMove ].play();
            if (this.intIndex == this.arraySequence.length) {
                this.intIndex = 0;
                this.stopObserving();
                setTimeout( ( function() { this.playSequence() } ).bind( this ), 1000 );
            }
            return true;
        }
        this.gameOver();
        return false;
    },
    chooseColor: function() {
        return Math.round( Math.random() * 3 );
    },
    gameOver: function() {
        alert( "Game Over! You survived " + this.arraySequence.length + " rotations");
    },
    playSequence: function() {
        if (this.intIndex < this.arraySequence.length) {
            this.arrayObjects[ this.arraySequence[ this.intIndex ] ].play();
            setTimeout( ( function() { this.playSequence() } ).bind( this ), 700 );
            this.intIndex++;
        } else {
            var intColor = this.chooseColor();
            this.arraySequence.push( intColor );
            this.arrayObjects[ intColor ].play();
            this.intIndex = 0;
            this.startObserving();
        }
    },
    // prototype has an awkward method for using 'stopObserving' which requires us to have a sort of pointer -
    // that's the reason for this lame (if redundant) workaround method.. the anonymous function approach was much nicer..
    moveBeforeMove: function( e ) {
        switch ( Event.element( e ).id ) {
            case "simon_yellow":
                this.correctMove( 0 );
                break;
            case "simon_green":
                this.correctMove( 1 );
                break;
            case "simon_blue":
                this.correctMove( 2 );
                break;
            case "simon_red":
                this.correctMove( 3 );
                break;
        }
    },
    startObserving: function() {
        for (var i = 0; i < this.arrayObjects.length; i++) {
            this.arrayEvents[i] = this.moveBeforeMove.bindAsEventListener( this );
            Event.observe( this.arrayObjects[ i ].objNode, "click", this.arrayEvents[ i ] );
        }
    },
    stopObserving: function() {
        for (var i = 0; i < this.arrayObjects.length; i++) {
            Event.stopObserving( this.arrayObjects[ i ].objNode, "click", this.arrayEvents[ i ] );
        }
    }
};

Objective
Repeat the sequence of colors that the computer chooses.

Instructions
Click "Let's Play!" to begin a new game. Watch the colors that the computer chooses, and repeat the colors in the same order. Each time you complete a sequence you a new rotation will start, containing the previous rotation plus an additional color. The goal of the game is to complete as many rotations as you can. Try and beat your previous scores!