/*VARIABLES*/

// movieclips
var thumbs:Array = new Array(t01_mc,t02_mc,t03_mc,t04_mc,t05_mc);

// frame labels
var labels:Array = new Array("img1","img2","img3","img4","img5");

// current image
var currentImg:Number = 0;

// toggle play state
var isPlaying:Boolean = false;

// toggle random function
var isRandom:Boolean = false;

/*FUNCTIONS*/

//////////////////////////////////////////////////////////////
// init
// Initialize variables
//////////////////////////////////////////////////////////////
function init(){

    // set framerate
    stage.frameRate = 60;

    // dim/undim buttons
    pauseBtn.alpha = 0.5;
    playBtn.alpha = 1;
    playStartBtn.alpha = 1;

    //set properties and add listeners to thumbs
    for(var t=0; t<thumbs.length; t++){
        thumbs[t].buttonMode = true;
        thumbs[t].useHandCursor = true;
        thumbs[t].addEventListener(MouseEvent.CLICK, setNextFrame);
    }

    // needed to get hand cursors
    prevBtn.buttonMode = true;
    nextBtn.buttonMode = true;
    playBtn.buttonMode = true;
    playStartBtn.buttonMode = true;
    firstBtn.buttonMode = true;
    lastBtn.buttonMode = true;
    randomBtn.buttonMode = true;
    pauseBtn.buttonMode = true;

    // use hand cursors on buttons
    prevBtn.useHandCursor = true;
    nextBtn.useHandCursor = true;
    playBtn.useHandCursor = true;
    playStartBtn.useHandCursor = true;
    firstBtn.useHandCursor = true;
    lastBtn.useHandCursor = true;
    randomBtn.useHandCursor = true;
    pauseBtn.useHandCursor = true;

}



//////////////////////////////////////////////////////////////
// setNextFrame
// Determine the next frame to jump to
//////////////////////////////////////////////////////////////
function setNextFrame(evt){

    // next button clicked
    if(evt.target == nextBtn){
        // see if currently on last image
        if(currentImg < (thumbs.length - 1)){
            // if not go to next image
            currentImg++;
        }else{
            // if so go to beginning
            currentImg = 0;
        }
    }

    // previous button clicked
    if(evt.target == prevBtn){
        //see if on first image
        if(currentImg > 0){
            // if not go to previous image
            currentImg--;
        }else{
            // otherwise to go to last image
            currentImg = thumbs.length -1;
        }
    }

    // thumbnail clicked
    for(var i=0; i<thumbs.length; i++){

        // check which thumbnail was clicked
        if(evt.target == thumbs[i]){
            // set current image to thumbnail clicked
            currentImg = i;
        }
    }

    if(isRandom){
        // set current image to a random number 0-4
        currentImg = (Math.floor(Math.random()*4) + 1);
    }

    // reset buttons
    playBtn.alpha = 1;
    playBtn.alpha =1;

    // stay on the frame
    isPlaying = false;

    // go to next image
    goToNextImage();
}



//////////////////////////////////////////////////////////////
// goToNextImage
// go to the next frame determined by setNextFrame
//////////////////////////////////////////////////////////////
function goToNextImage(){

    gotoAndPlay(labels[currentImg]);

}


//////////////////////////////////////////////////////////////
// playHandler
// Determine which play button was pressed and what to do
//////////////////////////////////////////////////////////////
function playHandler(evt){

    stage.frameRate = 10;

    // if play start button clicked
    if(evt.target == playStartBtn){
        // reference to button
        var currentPlayBtn = evt.target;

        // enable pause button
        pauseBtn.alpha = 1;

        // set playhead at start
        currentImg = 0;

        // if other play button is dimmed
        if(playBtn.alpha != 1){
            // undim it
            playBtn.alpha =1;
        }
    }


    // if play button clicked
    if(evt.target == playBtn){
        // reference to button
        currentPlayBtn = evt.target;

        // enable pause button
        pauseBtn.alpha = 1;

        // if other play button is dimmed
        if(playBtn.alpha != 1){
            // undim it
            playBtn.alpha = 1;
        }
    }

    // go to next image
    goToNextImage();

    // turn continuous play on
    isPlaying = true;

    // set button properties
    currentPlayBtn.alpha = .5;
    currentPlayBtn.useHandCursor = false;

    // set listeners
    currentPlayBtn.removeEventListener(MouseEvent.CLICK, playHandler);
    addEventListener(Event.ENTER_FRAME, playSlideShow);

    pauseBtn.alpha = 1;
    pauseBtn.addEventListener(MouseEvent.CLICK, setPause);
}

//////////////////////////////////////////////////////////////
// setPause
// Handle the pause button
//////////////////////////////////////////////////////////////
function setPause(evt){

    // if paused clicked
    if(evt.target == pauseBtn){

        //turn off playing
        isPlaying = false;

        // reset play button properties and listeners
        playBtn.alpha = 1;
        playBtn.addEventListener(MouseEvent.CLICK, playHandler);

        // reset play from start button properties and listeners
        playStartBtn.alpha = 1;
        playStartBtn.addEventListener(MouseEvent.CLICK, playHandler);

        // reset pause button properties and listeners
        pauseBtn.alpha = .5;
        pauseBtn.removeEventListener(MouseEvent.CLICK, setPause);
    }
}

//////////////////////////////////////////////////////////////
// playSlideShow
// Play through all of the images
//////////////////////////////////////////////////////////////
function playSlideShow(evt){

    // if slideshow is playing
    if(isPlaying){

        // if not at last frame
        if(currentFrame < totalFrames){
            // go to next frame
            nextFrame();

        // if at the last frame
        }else{
            // go to beginning
            gotoAndPlay(1);
            //and stay there
            isPlaying = false;
        }
    }

    // release the event listener at the end of the slideshow
    if(isPlaying == false){

        // set framerate back
        stage.frameRate = 60;

        // remove enter frame listener
        removeEventListener(Event.ENTER_FRAME, playSlideShow);
    }
}


//////////////////////////////////////////////////////////////
// setRandom
// Flip through images randomly (only works with next/previous buttons)
//////////////////////////////////////////////////////////////
function setRandom(evt){

    // set variable and dim the icon when clicked
    if (isRandom == true){
        randomBtn.alpha = 1;
        isRandom = false;
    } else if (isRandom == false){
        randomBtn.alpha = 0.5;
        isRandom = true;
    }
}


//////////////////////////////////////////////////////////////
// gotoFirst
// Jump to beginning of slides
//////////////////////////////////////////////////////////////
function gotoFirst(evt){
    gotoAndPlay(labels[0]);
}

//////////////////////////////////////////////////////////////
// gotoLast
// Jump to end of slides
//////////////////////////////////////////////////////////////
function gotoLast(evt){
    gotoAndPlay(labels[labels.length-1]);
}




/*FUNCTION CALLS*/
init();


/*LISTENERS*/

prevBtn.addEventListener(MouseEvent.CLICK, setNextFrame);

nextBtn.addEventListener(MouseEvent.CLICK, setNextFrame);

playBtn.addEventListener(MouseEvent.CLICK, playHandler);
playStartBtn.addEventListener(MouseEvent.CLICK, playHandler);

firstBtn.addEventListener(MouseEvent.CLICK, gotoFirst);
lastBtn.addEventListener(MouseEvent.CLICK, gotoLast);

randomBtn.addEventListener(MouseEvent.CLICK, setRandom);