/**
 * @author Bruno Bornsztein <bruno@missingmethod.com>
 * @copyright 2007 Curbly LLC
 * @package Glider
 * @license MIT
 * @url http://www.missingmethod.com/projects/glider/
 * @version 0.0.3
 * @dependencies prototype.js 1.5.1+, effects.js
 */

/*  Thanks to Andrew Dupont for refactoring help and code cleanup - http://andrewdupont.net/  */

/* Changes for Project:
	AW:2008-08-26	included flash player changes to rewind and start playing flash movie. also added array of flash players to the object (this.flash_players)
*/

Effect.SmoothScroll = Class.create();
Object.extend(Object.extend(Effect.SmoothScroll.prototype, Effect.Base.prototype), {
    initialize: function(element) {
        this.element = $(element);
        var options = Object.extend({
            x: 0,
            y: 0,
            mode: 'absolute'
        },
        arguments[1] || {});
        this.start(options);
    },
    setup: function() {
        if (this.options.continuous && !this.element._ext) {
            this.element.cleanWhitespace();
            this.element._ext = true;
            this.element.appendChild(this.element.firstChild);
        }

        this.originalLeft = this.element.scrollLeft;
        this.originalTop = this.element.scrollTop;

        if (this.options.mode == 'absolute') {
            this.options.x -= this.originalLeft;
            this.options.y -= this.originalTop;
        }
    },
    update: function(position) {
        this.element.scrollLeft = this.options.x * position + this.originalLeft;
        this.element.scrollTop = this.options.y * position + this.originalTop;
    }
});

Glider = Class.create();
Object.extend(Object.extend(Glider.prototype, Abstract.prototype), {
    initialize: function(wrapper, share_button, options) {
        this.scrolling = false;
        this.wrapper = $(wrapper);
        this.scroller = this.wrapper.down('badge_ul');
        this.sections = $$('#badge_ul li');
        this.options = Object.extend({
            duration: 1.0,
            frequency: 3
        },
        options || {});
		this.share_button = $(share_button);
		
		var nav_dots = $$('.dot');
		var share_urls = $$('.shared_url');
		var advance_times = $$('.advance_times');
		
        this.sections.each(function(section, index) {
            section._index = index;
            section.flash_player = $(section).down(1);
			if(!Object.isUndefined(nav_dots)) section.nav_dot = nav_dots[index];
			section.shared_tag_url = share_urls[index].value;
			section.advance_time = advance_times[index].value;
        });

		if(!Object.isUndefined(this.sections[0].nav_dot)) this.sections[0].nav_dot.addClassName('select');
		this.current = this.sections[0];
		this.advance_time = (15000-this.sections.length*1000) / this.sections.length;
        this.events = {
            click: this.click.bind(this)
        };

        this.addObservers();
        if (this.options.initialSection) this.moveTo(this.options.initialSection, this.wrapper, {
            duration: this.options.duration
        });
        // initialSection should be the id of the section you want to show up on load
        if (this.options.autoGlide) this.start();
    },

    addObservers: function() {
        var controls = this.wrapper.getElementsBySelector('div.controls a');
        controls.invoke('observe', 'click', this.events.click);
    },

    click: function(event) {
        this.stop();
        var element = Event.findElement(event, 'a');
        if (this.scrolling) this.scrolling.cancel();

        this.moveTo(element.href.split("#")[1], this.wrapper, {
            duration: this.options.duration
        });
        Event.stop(event);
    },

    moveTo: function(element, container, options) {
        this.current = $(element);

        Position.prepare();
        var containerOffset = Position.cumulativeOffset(container),
        elementOffset = Position.cumulativeOffset($(element));

        this.scrolling = new Effect.SmoothScroll(container,
        {
            duration: options.duration,
            x: (elementOffset[0] - containerOffset[0]),
            y: (elementOffset[1] - containerOffset[1])
        });

		this.playFlash(element);

        return false;
    },

	// This will rewind and play the flash movie if there is one.
	playFlash: function(element) {
		// need to do a try catch to catch the error if the badge isn't a flash element.
		
		try {
			$(element.flash_player).Rewind();
			$(element.flash_player).Play();
		}
		catch(err) {
			return false;
		}
		
		return false;
	},

    next: function() {
        if (this.current) {
            var currentIndex = this.current._index;
			var nextIndex = (this.sections.length - 1 == currentIndex) ? currentIndex : currentIndex + 1;
            // var nextIndex = (this.sections.length - 1 == currentIndex) ? 0 : currentIndex + 1;
        } else var nextIndex = 1;
		
		if(currentIndex != nextIndex) {
			this.sections[nextIndex].nav_dot.toggleClassName('select');
			this.sections[currentIndex].nav_dot.toggleClassName('select');
			
        	this.moveTo(this.sections[nextIndex], this.wrapper, {
            	duration: this.options.duration
        	});
		}
    },

    previous: function() {
        if (this.current) {
            var currentIndex = this.current._index;
			var prevIndex = (currentIndex == 0) ? currentIndex : currentIndex - 1;
            // var prevIndex = (currentIndex == 0) ? this.sections.length - 1 : currentIndex - 1;
        } else var prevIndex = this.sections.length - 1;

		if(currentIndex != prevIndex) {
			this.current.nav_dot.toggleClassName('select');
			this.sections[prevIndex].nav_dot.toggleClassName('select');
			
        	this.moveTo(this.sections[prevIndex], this.wrapper, {
            	duration: this.options.duration
        	});	
		}
    },

    stop: function()
    {
        clearTimeout(this.timer);
    },

    start: function()
    {
        this.periodicallyUpdate();
    },

    periodicallyUpdate: function()
    {
        if (this.timer != null) {
            clearTimeout(this.timer);
            this.next();
        }
		if(this.sections.length - 1 != this.current._index) {
			var advance_time = this.sections[this.current._index].advance_time
			this.timer = setTimeout(this.periodicallyUpdate.bind(this), advance_time);
		}
    }

});