//=========================================================

// MODIFIED BY: Scott Sousa for the Scotty Doesn't Know You Application

// jquery.innerfade.js

// Datum: 2008-02-14
// Firma: Medienfreunde Hofmann & Baldes GbR
// Author: Torsten Baldes
// Mail: t.baldes@medienfreunde.com
// Web: http://medienfreunde.com

// based on the work of Matt Oakes http://portfolio.gizone.co.uk/applications/slideshow/
// and Ralf S. Engelschall http://trainofthoughts.org/

// =========================================================


(function($) {

    $.fn.innerfade = function(options) {
        return this.each(function() {   
            $.innerfade(this, options);		
        });
    };

    $.innerfade = function(container, options) {
        var settings = {
        	'animationtype':    'fade',
            'speed':            'normal',
            'type':             'sequence',
            'timeout':          2000,
            'containerheight':  'auto',
            'runningclass':     'innerfade',
            'children':         null
        };
		
		var know = new Array();

        if (options)
            $.extend(settings, options);
        if (settings.children === null)
            var elements = $(container).children();
        else
            var elements = $(container).children(settings.children);
        if (elements.length > 1) {
            $(container).addClass(settings.runningclass);
            for (var i = 0; i < elements.length; i++) {
                $(elements[i]).css('z-index', String(elements.length-i)).css('position', 'absolute').attr('id', 'tweet_'+(i+1)).hide();
				know[i] = $('#tweet_'+(i+1)+' .know').html();
				//alert(know[i]);
            };
				// Add css properties to the thought boxes
                $('#thoughtdont').css('z-index', '1').css('position', 'absolute').hide();
                $('#thoughtdo').css('z-index', '2').css('position', 'absolute').hide();

            if (settings.type == "sequence") {
                setTimeout(function() {
                    $.innerfade.next(elements, settings, 1, 0, know);
					if(know[1] == 'don\'t') {
						$('#thoughtdo').fadeOut(settings.speed);
      					$('#thoughtdont').fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
					}
					else if(know[1] == "do") {
						$('#thoughtdont').fadeOut(settings.speed);
						$('#thoughtdo').fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
					}
                }, settings.timeout);
                $(elements[0]).show();
				
				// Set know variable
				//var know = $('.tweet:visible .know').html();
				// Determine which thought to display first 
				if(know[0] == 'don\'t') {
					$('#thoughtdo').hide();
        		    $('#thoughtdont').show();
				}
				else if(know[0] == "do") {
					$('#thoughtdo').show();
        		    $('#thoughtdont').hide();
				}
				
            } else if (settings.type == "random") {
            		var last = Math.floor ( Math.random () * ( elements.length ) );
                setTimeout(function() {
                    do { 
												current = Math.floor ( Math.random ( ) * ( elements.length ) );
										} while (last == current );             
										$.innerfade.next(elements, settings, current, last);
                }, settings.timeout);
                $(elements[last]).show();
						} else if ( settings.type == 'random_start' ) {
								settings.type = 'sequence';
								var current = Math.floor ( Math.random () * ( elements.length ) );
								setTimeout(function(){
									$.innerfade.next(elements, settings, (current + 1) %  elements.length, current);
								}, settings.timeout);
								$(elements[current]).show();
						}	else {
							alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
						}
				}

    };

    $.innerfade.next = function(elements, settings, current, last, knows) {
        if (settings.animationtype == 'slide') {
            $(elements[last]).slideUp(settings.speed);
            $(elements[current]).slideDown(settings.speed);
        } else if (settings.animationtype == 'fade') {
            $(elements[last]).fadeOut(settings.speed);		
            $(elements[current]).fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
			});
		
        } else
            alert('Innerfade-animationtype must either be \'slide\' or \'fade\'');
        if (settings.type == "sequence") {
            if ((current + 1) < elements.length) {
                current = current + 1;
                last = current - 1;
            } else {
                current = 0;
                last = elements.length - 1;
            }
        } else if (settings.type == "random") {
            last = current;
            while (current == last)
                current = Math.floor(Math.random() * elements.length);
        } else
            alert('Innerfade-Type must either be \'sequence\', \'random\' or \'random_start\'');
        setTimeout((function() {		
            $.innerfade.next(elements, settings, current, last, knows);
		
		// Set know variable
		//var know = $('.tweet:visible .know').html();
		// Determine which thought to display
		if(knows[current] == 'don\'t') {
			$('#thoughtdo').fadeOut(settings.speed);
            $('#thoughtdont').fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
		}
		else if(knows[current] == "do") {
			$('#thoughtdont').fadeOut(settings.speed);
            $('#thoughtdo').fadeIn(settings.speed, function() {
							removeFilter($(this)[0]);
						});
		}
        }), settings.timeout);
		
    };

})(jQuery);

// **** remove Opacity-Filter in ie ****
function removeFilter(element) {
	if(element.style.removeAttribute){
		element.style.removeAttribute('filter');
	}
}