window.addEvent('domready', init);

function init() {
	
	fixed_margin_top = $('top').getCoordinates().height + $('top').getCoordinates().top;
	margin_top = 20;
	margin_bottom = 50;
	content_header_height = 20;
	
	window_resize('resize');
	
	loadStyle();
	
	draggable_window = new Drag('content_wrapper', { 'handle': 'content_head', 'snap': 0});
	
	if($('referenzen_content')) {
		$$('#referenzen_content a').set('rel', 'lightbox');
	}
	
	Slimbox.scanPage();
	
	$(window).addEvent('resize', function(){
		if(viewport_height != $$('body')[0].getSize().y) {
			window_resize('reresize');
		}
	});
	
	if($('backgroundimage') && !$('no_autoslideshow')) {
		screensaver_timer('start');
	}
	
	if($('overlay')) {
		$('overlay').set('tween', {duration: 'long'});
	}
	
	if($$('.large').length > 0 && $$('.large').getLast().getElements('img').length > 1) {
		ce_slideshow($$('.large').getLast(), 'img');
	}
	
	if($$('.startseite_slideshow').length > 0 && $$('.startseite_slideshow').getLast().getElements('img').length > 1) {
		ce_slideshow($$('.startseite_slideshow').getLast(), 'img', 8000);
	}
	
	if($('backgroundimage') && !$('no_autoslideshow')) {
		$(document).addEvent('mousemove', function(event){
			if($defined(screensaver_delay)) {
				screensaver_timer('restart');
				mousepos_x = event.client.x;
				mousepos_y = event.client.y;
				timestamp = (new Date()).getTime();
			} else {
				if(typeof(timestamp) != 'undefined' && ((new Date()).getTime() - timestamp) > 1000) {
					if(event.client.x > (mousepos_x + 10) || event.client.x < (mousepos_x - 10) || event.client.y > (mousepos_x + 10) || event.client.y < (mousepos_y - 10)) {
						timestamp = (new Date()).getTime();
						screensaver('stop');
					}
				} else if(typeof(timestamp) == 'undefined') {
					timestamp = (new Date()).getTime();
					screensaver('stop');
				}
			}
		});
	}
	
	if(!$('no_autoslideshow')) {
		$('minimieren').addEvent('click', function(){
			minimize();
			screensaver('start');
		});
	
		$('maximieren').addEvent('click', function(){
			maximize();
		});
	}
	
	
	$('toggle_rot').addEvent('click', function(){
		setStyle('mkb_rot');
	});
	
	$('toggle_blau').addEvent('click', function(){
		setStyle('mkb_blau');
	});
	
	$('toggle_grau').addEvent('click', function(){
		setStyle('mkb_grau');
	});
	
}

function screensaver_timer(action) {
	if($('backgroundimage')) {
		switch(action) {
			case 'start': screensaver_delay = screensaver.delay(60000, null, 'start'); break;
			case 'restart': screensaver_timer('stop'); screensaver_timer('start'); break;
			case 'stop': screensaver_delay = $clear(screensaver_delay); break;
		}
	}
}

function screensaver(action) {
	switch(action) {
		case 'start':
			minimize();
			if($('overlay')) {
				$('overlay').fade('0');
				screensaver_slideshow();
			}
			screensaver_timer('stop');
			break;
		case 'stop':
			screensaver_timer('start');
			if($('overlay')) {
				$('overlay').fade('1');
				screensaver_slideshow_fader = $clear(screensaver_slideshow_fader);
			}
			maximize.delay(1000);
			break;
	}
}

function screensaver_slideshow() {
	if($('backgroundimage')) {
		image_urls = ['tl_files/images/background/01.jpg','tl_files/images/background/02.jpg','tl_files/images/background/03.jpg','tl_files/images/background/04.jpg','tl_files/images/background/05.jpg','tl_files/images/background/06.jpg','tl_files/images/background/07.jpg','tl_files/images/background/08.jpg','tl_files/images/background/09.jpg','tl_files/images/background/10.jpg','tl_files/images/background/11.jpg','tl_files/images/background/12.jpg','tl_files/images/background/13.jpg','tl_files/images/background/14.jpg','tl_files/images/background/15.jpg','tl_files/images/background/16.jpg','tl_files/images/background/17.jpg','tl_files/images/background/18.jpg','tl_files/images/background/19.jpg','tl_files/images/background/20.jpg','tl_files/images/background/21.jpg',]
		$('backgroundimage').set('tween', {duration: 1000});
		
		screensaver_slideshow_fader = (function(){
				var next_image = image_urls.getRandom();
				while(next_image == $('backgroundimage').getProperty('src')) {
					next_image = image_urls.getRandom();
				}
	 
				var preload = new Asset.image(next_image);
				$('backgroundimage').setProperty('src', next_image);
		}).periodical(5000);
	}
}

function window_resize(type) {
	content_wrapper_el = $('content_wrapper');
	viewport_height = $(document).getSize().y;
	if(type != 'reresize') {
		content_height = content_wrapper_el.getSize().y;
	}
	var max_content_height = viewport_height - fixed_margin_top - margin_top - margin_bottom;
	if(content_height > max_content_height) {
		var new_content_height = max_content_height;
		var new_margin_top = margin_top;
	} else {
		var new_content_height = content_height;
		var new_margin_top = (max_content_height - content_height) / 2 + margin_top - content_header_height;
		if(new_margin_top < 10) {
			new_margin_top = 10;
		}
	}
	$('content_wrapper').setStyles({'top': new_margin_top, 'height': new_content_height});
	$('naviMeta').setStyles({'top': new_margin_top});
	$('content').setStyles({'overflow-x': 'hidden', 'overflow-y': 'auto', 'height': new_content_height - content_header_height});
	if($('referenzen_content')) {
		$('referenzen_content').setStyle('height', new_content_height - content_header_height);
	}
}

function minimize() {
	var content_wrapper_el = document.getElementById('content_wrapper');
	if(content_wrapper_el.className != 'minimized') {
		content_wrapper_el.className = 'minimized';
		content_h2_data = document.getElementById('content').getElementsByTagName('h2')[0].firstChild.data;
		var content_head_headline = document.getElementById('content_head_headline').firstChild;
		content_head_headline.data = content_h2_data;
		content_wrapper_el.setStyle('height', 0);
	}
}

function maximize() {
	var content_wrapper_el = document.getElementById('content_wrapper');
	if(content_wrapper_el.className != 'maximized' && content_wrapper_el.className != '') {
		content_wrapper_el.className = 'maximized';
		var content_head_headline = document.getElementById('content_head_headline').firstChild;
		content_head_headline.data = ' ';
	}
	if(!$('backgroundimage')) {
		$('overlay').fade('1');
	}
	window_resize('reresize');
}

function ce_slideshow(container, type, length) {
	var length = length ? length : 4000 ;
	var elements = container.getElements(type);
	var elementcount = elements.length - 1;
	var visible = 0;
	elements.fade('hide');
	elements[visible].fade('show');
	
	var fader = window.setInterval(function(){
		elements[visible].fade(0);
		if(visible == elementcount) {
			visible = 0;
		} else {
			visible = visible + 1;
		}
		elements[visible].fade(1);
	}, length);
}