/**
*	ImageFlow 1.0
*
*	This code is based on Michael L. Perrys Cover flow in Javascript.
*	For he wrote that "You can take this code and use it as your own" [1]
*	this is my attempt to improve some things. Feel free to use it! If
*	you have any questions on it leave me a message in my shoutbox [2].
*
*	The reflection is generated server-sided by a slightly hacked
*	version of Richard Daveys easyreflections [3] written in PHP.
*
*	The mouse wheel support is an implementation of Adomas Paltanavicius
*	JavaScript mouse wheel code [4].
*
*	Thanks to Stephan Droste ImageFlow is now compatible with Safari 1.x.
*
*	Thanks to ceasar feijen from cfconsultancy for the extra options and optimizing the js [5]
*
*	[1] http://www.adventuresinsoftware.com/blog/?p=104#comment-1981
*	[2] http://shoutbox.finnrudolph.de/
*	[3] http://reflection.corephp.co.uk/v2.php
*	[4] http://adomas.org/javascript-mouse-wheel/
*	[5] http://www.cfconsultancy.nl/
*  Script from http://www.imageflow.nl
*/

$(document).ready(function() {

    //Dialog do Google Maps
    $("#divYoutube").dialog({
        close: function() { $("#Youtube").remove().appendTo("#divYoutubeContainer"); $("#Youtube").empty().removeAttr("style").css("visibility", "visible"); },
        autoOpen: false,
        bgiframe: true,
        modal: true,
        position: 'center',
        width: 670,
        height: 540
    }).css("overflow-x", "hidden");

});

    /* Configuration variables */
    var conf_reflection_p = 0.5;         // Sets the height of the reflection in % of the source image
    var conf_focus = 4;                  // Sets the numbers of images on each side of the focussed one
    var conf_slider_width = 14;          // Sets the px width of the slider div
    var conf_images_cursor = 'pointer';  // Sets the cursor type for all images default is 'default'
    var conf_slider_cursor = 'e-resize'; // Sets the slider cursor type: try "e-resize" default is 'default'

    /* Id names used in the HTML */
    var conf_imageflow = 'imageflow';    // Default is 'imageflow'
    var conf_loading = 'loading';        // Default is 'loading'
    var conf_images = 'images';          // Default is 'images'
    var conf_captions = 'captions';      // Default is 'captions'
    var conf_scrollbar = 'scrollbar';    // Default is 'scrollbar'
    var conf_slider = 'slider';          // Default is 'slider'
    var conf_slideshow = 'slideshow';    // Default is 'slideshow'
    var conf_youtube = 'youtubepopup';   // Default is 'slideshow'

    /* Define global variables */
    var caption_id = 0;
    var new_caption_id = 0;
    var current = 0;
    var target = 0;
    var mem_target = 0;
    var timer = 0;
    var array_images = [];
    var new_slider_pos = 0;
    var dragging = false;
    var dragobject = null;
    var dragx = 0;
    var posx = 0;
    var new_posx = 0;
    var xstep = 150;
    var slide = null;
    var sizeAlgo = 0; // 0 = default, 1 = small to big
    /* Glide to a picture on startup. For example 10 is the 11th picture
    Use 0 for the starting picture*/
    var glidetopicture = 0;
    /* Slideshow setting */
    var slideshowtime = 3000;
    var slideshowbutton = false;
    var slideshowauto = false;
    /* video settings */
    var videowidht = '425';
    var videoheight = '350';
    var videotop = '-350px';
    var videoleft = '-30px';
    /* Output video, highslide, empty for normal link */
    var output = "";

    function step() {
        switch (target < current - 1 || target > current + 1) {
            case true:
                moveTo(current + (target - current) / 3);
                window.setTimeout(step, 50);
                timer = 1;
                break;

            default:
                timer = 0;
                break;
        }
    }

    function slideshow(i) {
        var len = img_div.childNodes.length;
        var max = 0;
        for (i = 0; i < len; i++) {
            if (img_div.childNodes.item(i).nodeType == 1)
                max++;
        }
        if (caption_id == max - 1) {
            target == 0;
            glideTo(0, 0);
            slide = window.setTimeout('slideshow(1)', slideshowtime);
        }
        else {
            handle(-1);
            i = i + 1;
            slide = window.setTimeout('slideshow(' + i + ')', slideshowtime);
        }
        slideshow_div.style.display = 'none';
    }

    function stopslideshow() {
        slideshow_div.style.display = 'block';
        window.clearTimeout(slide);
    }

    function glideTo(x, new_caption_id) {
        /* Animate gliding to new x position */
        target = x;
        mem_target = x;
        if (timer == 0) {
            window.setTimeout(step, 50);
            timer = 1;
        }

        if (max == 0) {
            hide(conf_loading);
            hide(conf_scrollbar);
            hide(conf_slideshow);
        }
        else {

            /* Display new caption */
            caption_id = new_caption_id;
            caption = img_div.childNodes.item(array_images[caption_id]).getAttribute('alt');
            if (caption == '') caption = '&nbsp;';
            caption_div.innerHTML = caption;
        }

        /* Set scrollbar slider to new position */
        if (dragging === false) {
            new_slider_pos = (scrollbar_width * (-(x * 100 / ((max - 1) * xstep))) / 100) - new_posx;
            slider_div.style.marginLeft = (new_slider_pos - conf_slider_width) + 'px';
        }
    }

    function moveTo(x) {
        current = x;
        var zIndex = max;

        /* Main loop */
        for (var index = 0; index < max; index++) {
            var image = img_div.childNodes.item(array_images[index]);
            var current_image = index * -xstep;

            /* Don't display images that are not conf_conf_focussed */
            if ((current_image + max_conf_focus) < mem_target || (current_image - max_conf_focus) > mem_target) {
                image.style.visibility = 'hidden';
                image.style.display = 'none';
            }
            else {
                var xs;
                switch (sizeAlgo) {
                    default:
                        var z = Math.sqrt(10000 + x * x) + 100;
                        xs = x / z * size + size;
                        break;
                    case 1:
                        var sgn_x = (x > 0) ? 1 : -1; var z = 150 + Math.pow(Math.abs(x), 0.8);
                        xs = sgn_x * Math.pow(Math.abs(x), 0.8) + size;
                        break;
                }

                /* Still hide images until they are processed, but set display style to block */
                image.style.display = 'block';

                /* Process new image height and image width */
                var new_img_h = (image.h / image.w * image.pc) / z * size;
                switch (new_img_h > max_height) {
                    case false:
                        var new_img_w = image.pc / z * size;
                        break;

                    default:
                        new_img_h = max_height;
                        var new_img_w = image.w * new_img_h / image.h;
                        break;
                }
                var new_img_top = (images_width * 0.34 - new_img_h) + images_top + ((new_img_h / (conf_reflection_p + 1)) * conf_reflection_p);

                /* Set new image properties */
                image.style.left = xs - (image.pc / 2) / z * size + images_left + 'px';
                if (new_img_w && new_img_h) {
                    image.style.height = new_img_h + 'px';
                    image.style.width = new_img_w + 'px';
                    image.style.top = new_img_top + 'px';
                }
                image.style.visibility = 'visible';

                /* Set image layer through zIndex */
                switch (x < 0) {
                    case true:
                        zIndex++;
                        break;

                    default:
                        zIndex = zIndex - 1;
                        break;
                }

                /* Change zIndex and onclick function of the focussed image and stop slideshow */
                switch (image.i == caption_id) {
                    case false:
                        image.onclick = function() {
                            stopslideshow();

                            glideTo(this.x_pos, this.i);

                        };
                        break;

                    default:
                        zIndex = zIndex + 1;

                        if (max == image.i + 1 && document.getElementById('imfl_next') != null && document.getElementById('imfl_next') != 'undefined' && document.getElementById('imfl_next') != undefined) {

                            image.onclick = function() { document.location = this.url; };
                            break;

                        } else if (image.i == 0 && document.getElementById('imfl_previous') != null && document.getElementById('imfl_previous') != 'undefined' && document.getElementById('imfl_previous') != undefined) {

                            image.onclick = function() { document.location = this.url; };
                            break;

                        } else {

                            switch (output) {
                                case "highslide":
                                    image.onclick = function() { return hs.expand(this, { src: this.getAttribute('longdesc') }); };
                                    break;
                                case "video":
                                    image.onclick = function() { playVid(this.url); };
                                    break;
                                default:
                                    image.onclick = function() { document.location = this.url; };
                                    break;
                            }
                        }
                }
                image.style.zIndex = zIndex;
            }
            x += xstep;
        }
    }

    /* Main function */
    function refresh(onload) {
        /* Cache document objects in global variables */
        imageflow_div = document.getElementById(conf_imageflow);
        img_div = document.getElementById(conf_images);
        scrollbar_div = document.getElementById(conf_scrollbar);
        slider_div = document.getElementById(conf_slider);
        caption_div = document.getElementById(conf_captions);
        slideshow_div = document.getElementById(conf_slideshow);
        youtube_div = document.getElementById(conf_youtube);

        /* Cache global variables, that only change on refresh */
        images_width = img_div.offsetWidth;
        images_top = imageflow_div.offsetTop;
        images_left = imageflow_div.offsetLeft;
        max_conf_focus = conf_focus * xstep;
        size = images_width * 0.5;
        scrollbar_width = images_width * 0.6;
        conf_slider_width = conf_slider_width * 0.5;
        max_height = images_width * 0.51;

        /* Change imageflow div properties */
        imageflow_div.style.height = max_height + 'px';

        /* Change images div properties */
        img_div.style.height = images_width * 0.338 + 'px';

        /* Change captions div properties */
        caption_div.style.width = images_width + 'px';
        caption_div.style.marginTop = images_width * 0.03 + 'px';

        /* Change scrollbar div properties */
        scrollbar_div.style.marginTop = images_width * 0.02 + 'px';
        scrollbar_div.style.marginLeft = images_width * 0.2 + 'px';
        scrollbar_div.style.width = scrollbar_width + 'px';

        /* Set slider attributes */
        slider_div.onmousedown = function() { dragstart(this); return false; };
        slider_div.style.cursor = conf_slider_cursor;

        /* Cache EVERYTHING! */
        max = img_div.childNodes.length;
        var i = 0;
        for (var index = 0; index < max; index++) {
            var image = img_div.childNodes.item(index);
            if (image.nodeType === 1) {
                array_images[i] = index;

                /* Set image onclick by adding i and x_pos as attributes! */
                image.onclick = function() { glideTo(this.x_pos, this.i); };
                image.x_pos = (-i * xstep);
                image.i = i;

                /* Add width and height as attributes ONLY once onload */
                if (onload == true) {
                    image.w = image.width;
                    image.h = image.height;
                }

                /* Check source image format. Get image height minus reflection height! */
                switch ((image.w + 1) > (image.h / (conf_reflection_p + 1))) {
                    /* Landscape format */ 
                    case true:
                        image.pc = 118;
                        break;

                    /* Portrait and square format */ 
                    default:
                        image.pc = 100;
                        break;
                }

                /* Set ondblclick event */
                image.url = image.getAttribute('longdesc');
                //image.ondblclick = function() { document.location = this.url; }

                /* Set image cursor type */
                image.style.cursor = conf_images_cursor;

                i++;
            }
        }
        max = array_images.length;

        /* Display images in current order */
        moveTo(current);
        glideTo(current, caption_id);
    }

    /* Show/hide element functions */
    function show(id) {
        var element = document.getElementById(id);
        element.style.visibility = 'visible';
    }
    function hide(id) {
        var element = document.getElementById(id);
        element.style.visibility = 'hidden';
        element.style.display = 'none';
    }

    /* Hide loading bar, show content and initialize mouse event listening after loading */
    function startimageflow() {

//        $.ajax({
//            type: 'GET',
//            url: "/content/youtube/index.php",
//            dataType: "html",
//            async: false,
//            cache: false,
//            success: function(dados) {
//                $("#images").html(dados);
//            }
//        });


        if (document.getElementById(conf_imageflow)) {
            hide(conf_loading);
            refresh(true);
            show(conf_images);
            show(conf_scrollbar);
            if (slideshowbutton) {
                show(conf_slideshow);
            }
            initMouseWheel();
            initMouseDrag();
            if (glidetopicture == 0) {
                moveTo(5000);
            }
            if (max < glidetopicture) {
                moveTo(5000);
            } else {
                glideTo(-glidetopicture * 150, glidetopicture);
            }
            if (slideshowauto && max > 1) {
                slideshow(1);
            }
        }
    }

    function addLoadEvent(func) {
        var oldonload = window.onload;
        if (typeof window.onload !== 'function') {
            window.onload = func;
        } else {
            window.onload = function() {
                if (oldonload) {
                    oldonload();
                }
                func();
            };
        }
    }

    addLoadEvent(startimageflow);

    /* Refresh ImageFlow on window resize */
    window.onresize = function() {
        if (document.getElementById(conf_imageflow)) {
            refresh();
        }
    };

    if (navigator.userAgent.search(/msie/i) !== -1) {
        // nothing !!
    } else {
        /* Fixes the back button issue */
        window.onunload = function() {
            document = null;
        };
    }


    /* Handle the wheel angle change (delta) of the mouse wheel */
    function handle(delta) {
        var change = false;
        switch (delta > 0) {
            case true:
                if (caption_id >= 1) {
                    target = target + xstep;
                    new_caption_id = caption_id - 1;
                    change = true;
                }
                break;

            default:
                if (caption_id < (max - 1)) {
                    target = target - xstep;
                    new_caption_id = caption_id + 1;
                    change = true;
                }
                break;
        }

        /* Glide to next (mouse wheel down) / previous (mouse wheel up) image */
        if (change == true) {
            glideTo(target, new_caption_id);
        }
    }

    /* Event handler for mouse wheel event */
    function wheel_imageflow(event) {
        var delta = 0;
        if (!event) {
            event = window.event;
        }
        if (event.wheelDelta) {
            stopslideshow();

            delta = event.wheelDelta / 120;
        }
        else if (event.detail) {
            stopslideshow();

            delta = -event.detail / 3;
        }
        if (delta) {
            handle(delta);
        }
        if (event.preventDefault) {
            event.preventDefault();
        }
        event.returnValue = false;
    }

    /* Initialize mouse wheel event listener */
    function initMouseWheel() {
        if (window.addEventListener) {
            imageflow_div.addEventListener('DOMMouseScroll', wheel_imageflow, false);
        }
        imageflow_div.onmousewheel = wheel_imageflow;
    }

    /* This function is called to drag an object (= slider div) */
    function dragstart(element) {
        dragobject = element;
        dragx = posx - dragobject.offsetLeft + new_slider_pos;
    }

    /* This function is called to stop dragging an object */
    function dragstop() {
        dragobject = null;
        dragging = false;
    }

    /* This function is called on mouse movement and moves an object (= slider div) on user action */
    function drag(e) {
        posx = document.all ? window.event.clientX : e.pageX;
        if (dragobject != null) {
            dragging = true;

            stopslideshow();

            new_posx = (posx - dragx) + conf_slider_width;

            /* Make sure, that the slider is moved in proper relation to previous movements by the glideTo function */
            if (new_posx < (-new_slider_pos)) { new_posx = -new_slider_pos; }
            if (new_posx > (scrollbar_width - new_slider_pos)) { new_posx = scrollbar_width - new_slider_pos; }

            var slider_pos = (new_posx + new_slider_pos);
            var step_width = slider_pos / ((scrollbar_width) / (max - 1));
            var image_number = Math.round(step_width);
            var new_target = (image_number) * -xstep;
            var new_caption_id = image_number;

            dragobject.style.left = new_posx + 'px';
            glideTo(new_target, new_caption_id);
        }
    }

    /* Initialize mouse event listener */
    function initMouseDrag() {
        document.onmousemove = drag;
        document.onmouseup = dragstop;

        /* Avoid text and image selection while dragging  */
        document.onselectstart = function() {
            if (dragging == true) {
                return false;
            }
            else {
                return true;
            }
        };
    }

    function getKeyCode(event) {
        event = event || window.event;
        return event.keyCode;
    }

    document.onkeydown = function(event) {
        var charCode = getKeyCode(event);
        switch (charCode) {
            /* Right arrow key */ 
            case 39:
                handle(-1);
                stopslideshow();
                break;

            /* Left arrow key */ 
            case 37:
                handle(1);
                stopslideshow();
                break;
        }
    };

    function playVid(vidId) {

        stopslideshow();

        var vidstring = '<center><embed enablejavascript="false" allowScriptAccess="never"';
        vidstring += ' allownetworking="internal" type="application/x-shockwave-flash" allowfullscreen="true"';
        vidstring += ' src="' + vidId + '" ';
        vidstring += ' wmode="transparent" height="' + videoheight + '" width="' + videowidht + '"></center>';

        $("#Youtube").html(vidstring);

        $("#divYoutube").dialog('open');
        $("#Youtube").appendTo("#divYoutube").show();
    }

    function moveHandler(e) {
        if (e == null) {
            e = window.event
        }
        if (e.button <= 1 && dragOK) {
            selObj.style.left = e.clientX - dragXoffset + 'px';
            selObj.style.top = e.clientY - dragYoffset + 'px';
            return false;
        }
    }

    function cleanup(e) {
        document.onmousemove = null;
        document.onmouseup = null;
        selObj.style.cursor = orgCursor;
        dragOK = false;
    }

    function dragHandler(e) {
        var htype = '-moz-grabbing';
        if (e == null) {
            e = window.event; htype = 'move';
        }
        var target = e.target != null ? e.target : e.srcElement;
        selObj = target;
        orgCursor = target.style.cursor;

        if (target.className == "vidFrame" || target.className == "youtubemoveable") {
            target.style.cursor = htype;
            dragOK = true;
            dragXoffset = e.clientX - parseInt(selObj.style.left);
            dragYoffset = e.clientY - parseInt(selObj.style.top);
            document.onmousemove = moveHandler;
            document.onmouseup = cleanup;
            return false;
        }
    }

    document.onmousedown = dragHandler;