// Tooltip Object
var Tooltip = Class.create();
Tooltip.prototype = {
    initialize: function(el, options) {
        this.el = $(el);
        this.initialized = false;
        this.setOptions(options);

        // Event handlers
        this.showEvent = this.show.bindAsEventListener(this);
        this.hideEvent = this.hide.bindAsEventListener(this);
        this.updateEvent = this.update.bindAsEventListener(this);
        Event.observe(this.el, "mouseover", this.showEvent);
        Event.observe(this.el, "mouseout", this.hideEvent);

        // Removing title from DOM element to avoid showing it

        if (this.options.text == '') {
            this.content = this.el.title;
            this.el.title = "";
        }
        else {
            this.content = this.options.text;
        }

        // If descendant elements has 'alt' attribute defined, clear it
        this.el.descendants().each(function(el) {
            if (Element.readAttribute(el, 'alt'))
                el.alt = "";
        });
    },
    setOptions: function(options) {
        this.options = {
            backgroundColor: '#999', // Default background color
            borderColor: '#666', // Default border color
            textColor: '', // Default text color (use CSS value)
            textShadowColor: '', // Default text shadow color (use CSS value)
            maxWidth: 250, // Default tooltip width
            align: "left", // Default align
            delay: 250, // Default delay before tooltip appears in ms
            mouseFollow: true, // Tooltips follows the mouse moving
            opacity: .75, // Default tooltips opacity
            appearDuration: .25, // Default appear duration in sec
            hideDuration: .25, // Default disappear duration in sec
            text: ""
        };
        Object.extend(this.options, options || {});
    },
    show: function(e) {
        this.xCord = Event.pointerX(e);
        this.yCord = Event.pointerY(e);
        if (!this.initialized)
            this.timeout = window.setTimeout(this.appear.bind(this), this.options.delay);
    },
    hide: function(e) {
        if (this.initialized) {
            this.appearingFX.cancel();
            if (this.options.mouseFollow)
                Event.stopObserving(this.el, "mousemove", this.updateEvent);
            new Effect.Fade(this.tooltip, { duration: this.options.hideDuration, afterFinish: function() { Element.remove(this.tooltip) } .bind(this) });
        }
        this._clearTimeout(this.timeout);

        this.initialized = false;
    },
    update: function(e) {
        this.xCord = Event.pointerX(e);
        this.yCord = Event.pointerY(e);
        this.setup();
    },
    appear: function() {
        // Building tooltip container
        this.tooltip = Builder.node("div", { className: "pt-tooltip", style: "display: none;" }, [
			Builder.node("div", { className: "xtop" }, [
				Builder.node("div", { className: "xb1", style: "background-color:" + this.options.borderColor + ";" }),
				Builder.node("div", { className: "xb2", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" }),
				Builder.node("div", { className: "xb3", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" }),
				Builder.node("div", { className: "xb4", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" })
			]),
			Builder.node("div", { className: "xboxcontent", style: "background-color:" + this.options.backgroundColor +
				"; border-color:" + this.options.borderColor +
				((this.options.textColor != '') ? "; color:" + this.options.textColor : "") +
				((this.options.textShadowColor != '') ? "; text-shadow:2px 2px 0" + this.options.textShadowColor + ";" : "")
			}, this.content),
			Builder.node("div", { className: "xbottom" }, [
				Builder.node("div", { className: "xb4", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" }),
				Builder.node("div", { className: "xb3", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" }),
				Builder.node("div", { className: "xb2", style: "background-color:" + this.options.backgroundColor + "; border-color:" + this.options.borderColor + ";" }),
				Builder.node("div", { className: "xb1", style: "background-color:" + this.options.borderColor + ";" })
			]),
		]);


        document.body.insertBefore(this.tooltip, document.body.childNodes[0]);

        Element.extend(this.tooltip); // IE needs element to be manually extended
        this.options.width = this.tooltip.getWidth();
        this.tooltip.style.width = this.options.width + 'px'; // IE7 needs width to be defined

        this.setup();

        if (this.options.mouseFollow)
            Event.observe(this.el, "mousemove", this.updateEvent);

        this.initialized = true;
        this.appearingFX = new Effect.Appear(this.tooltip, { duration: this.options.appearDuration, to: this.options.opacity });
    },
    setup: function() {
        // If content width is more then allowed max width, set width to max
        if (this.options.width > this.options.maxWidth) {
            this.options.width = this.options.maxWidth;
            this.tooltip.style.width = this.options.width + 'px';
        }

        // Tooltip doesn't fit the current document dimensions
        if (this.xCord + this.options.width >= Element.getWidth(document.body)) {
            this.options.align = "right";
            this.xCord = this.xCord - this.options.width + 20;
        }

        this.tooltip.style.left = this.xCord + 27 + "px";
        this.tooltip.style.top = this.yCord + 12 + "px";
    },
    _clearTimeout: function(timer) {
        clearTimeout(timer);
        clearInterval(timer);
        return null;
    }
};