var GMapsOverlay = {

        init: function(options){
                this.options = Object.extend({
                        resizeDuration: 400,
                        resizeTransition: Fx.Transitions.sineInOut,
                        width: 250,
                        height: 250,
                        animateCaption: true
                }, options || {});
                
                if(!GBrowserIsCompatible()) return false;
                
                this.geocoder = new GClientGeocoder();

                this.anchors = [];
                $each(document.links, function(el){
                        if (el.rel && el.rel.test(/^gmapsoverlay/i)){
                                el.onclick = this.click.pass(el, this);
                                this.anchors.push(el);
                        }
                }, this);
                this.eventKeyDown = this.keyboardListener.bindAsEventListener(this);
                this.eventPosition = this.position.bind(this);

                this.overlay = new Element('div').setProperty('id', 'gmOverlay').injectInside(document.body);

                this.center = new Element('div').setProperty('id', 'gmCenter').setStyles({
                                                                                                                                                                 
                                                                                                                                                                 width: this.options.width+'px', 
                                                                                                                                                                 height: this.options.height+'px', 
                                                                                                                                                                 marginLeft: '-'+(this.options.width/2)+'px'
                                                                                                                                                                 }).injectInside(document.body);
                this.maplayer = new Element('div').setProperty('id', 'gmMap').injectInside(this.center);
                
                this.map = new GMap2(this.maplayer);
                this.map.addControl(new GLargeMapControl());
                this.map.addControl(new GMapTypeControl());
                
                this.bottomContainer = new Element('div').setProperty('id', 'gmBottomContainer').setStyle('display', 'none').injectInside(document.body);
                this.bottom = new Element('div').setProperty('id', 'gmBottom').injectInside(this.bottomContainer);
                new Element('a').setProperties({id: 'gmCloseLink', href: '#'}).injectInside(this.bottom).onclick = this.overlay.onclick = this.close.bind(this);
                this.caption = new Element('div').setProperty('id', 'gmCaption').injectInside(this.bottom);
                new Element('div').setStyle('clear', 'both').injectInside(this.bottom);
                
                this.center.style.display = 'none';
                
                var nextEffect = this.nextEffect.bind(this);
                this.fx = {
                        overlay: this.overlay.effect('opacity', {duration: 500, fps:100}).hide(),
                        resize: this.center.effects({duration: this.options.resizeDuration, transition: this.options.resizeTransition, onComplete: nextEffect}),
                        maplayer: this.maplayer.effect('opacity', {duration: 500, onComplete: nextEffect}),
                        bottom: this.bottom.effect('margin-top', {duration: 400, onComplete: nextEffect})
                };
                
        },

        click: function(link){
                return this.show(link.href);
        },

        show: function(link){
                this.link = link;
                this.position();
                this.setup(true);
                this.top = window.getScrollTop() + (window.getHeight() / 15);
                this.center.setStyles({top: this.top+'px', display: ''});
                this.fx.overlay.start(0.8);
                return this.changeLink();
        },

        position: function(){
                this.overlay.setStyles({top: window.getScrollTop()+'px', height: window.getHeight()+'px'});
        },

        setup: function(open){
                var elements = $A(document.getElementsByTagName('object'));
                if (window.ie) elements.extend(document.getElementsByTagName('select'));
                elements.each(function(el){ el.style.visibility = open ? 'hidden' : ''; });
                var fn = open ? 'addEvent' : 'removeEvent';
                window[fn]('scroll', this.eventPosition)[fn]('resize', this.eventPosition);
                document[fn]('keydown', this.eventKeyDown);
                this.step = 0;
        },

        keyboardListener: function(event){
                this.close();
        },

        changeLink: function(){
                this.step = 1;
                this.bottomContainer.style.display = 'none';
                this.fx.maplayer.hide();
                this.center.className = 'gmLoading';
                this.showAddress(decodeURI(this.link.substring(this.link.indexOf('q=')+2)));
                this.nextEffect();
                return false;
        },

        nextEffect: function(){
                switch (this.step++){
                case 1:
                        this.center.className = '';

                        this.caption.setHTML("<a href=\""+this.link+"\" target=\"_blank\">Google-Maps</a>");
                        if (this.center.clientHeight != this.maplayer.offsetHeight){
                                this.fx.resize.start({height: this.maplayer.offsetHeight, width: this.maplayer.offsetWidth, marginLeft: -this.maplayer.offsetWidth/2});
                                break;
                        }
                        this.step++;
                case 2:
                        this.bottomContainer.setStyles({top: (this.top + this.center.clientHeight)+'px', height: '0px', marginLeft: this.center.style.marginLeft, width: this.center.clientWidth+'px', display: ''});
                        this.fx.maplayer.start(1);
                        break;
                case 3:
                        if (this.options.animateCaption){
                                this.fx.bottom.set(-this.bottom.offsetHeight);
                                this.bottomContainer.style.height = '';
                                this.fx.bottom.start(0);
                                break;
                        }
                        this.bottomContainer.style.height = '';
                case 4:
                        this.step = 0;
                }
        },

        close: function(){
                if (this.step < 0) return;
                this.step = -1;
                for (var f in this.fx) this.fx[f].stop();
                this.center.style.display = this.bottomContainer.style.display = 'none';
                this.fx.overlay.chain(this.setup.pass(false, this)).start(0);
                return false;
        },
        
        showAddress: function(address){
                this.geocoder.getLatLng(
                address,
                function(point){
                        if(point){
                                this.map.setCenter(point, 6);
                                var marker = new GMarker(point);
                                this.map.addOverlay(marker);
                                marker.openInfoWindowHtml(address);
                        }
                        else
                        {
                                this.close();
                                alert('Nie znaleziono lokalizacji uzytkownika');
                        }
                }.bind(this));
        }
};
window.addEvent('domready', GMapsOverlay.init.bind(GMapsOverlay));