var defaultParams;
var params;
var initialized;
var timer;
var ageNames = ["today", "1 day", "2 days", "1 week", "2 weeks", "1 month", "2 months", "6 months", "1 year"];
var ageValues = [0, 1, 2, 7, 14, 31, 61, 183, 365];

function getParamsFromLocation()
{
    var url = document.location.toString();
    params = [];
    for (var i in defaultParams) {
        if (defaultParams.hasOwnProperty(i)) {
            params[i] = defaultParams[i];
        }
    }
    var anchor = url.indexOf('#');
    if (anchor > 0) {
        anchor = url.substr(anchor+1).split('&');
        for (var j in anchor) {
            if (anchor.hasOwnProperty(j)) {
                var parts = anchor[j].split('=');
                params[parts[0]] = decodeURIComponent(parts[1]);
            }
        }
    }
}

function getParamsFromControls()
{
    var age = $("#age").slider('value', 0);
    params.age = (age === 0) ? '*' : (age > 0 ? ageValues[age-1] : -ageValues[-age-1]-1);
    params.active = $("#active").slider('value', 0);
    params.mingravity = $("#gravity").slider('value', 0);
    params.maxgravity = $("#gravity").slider('value', 1);
    params.gravitydelta = $("#gravitydelta").slider('value', 0);
    params.payout = $("#payout").slider('value', 0);
    params.commission = $("#commission").slider('value', 0);
    params.pagerank = $("#pagerank").slider('value', 0);
    params.subscription = $("#subscription").slider('value', 0);
    params.description = $("#description").val();
    var category = $("#categories .selected").attr('id');
    params.category = category ? parseInt(category.substr(category.indexOf('-') + 1)) : 0;
}

function updateControlTexts()
{
    var age = $("#age").slider('value', 0);
    var ageText = age ? (age > 0 ? "added " + ageNames[age-1] + (age > 1 ? " ago" : "") : "removed " + (ageNames[-age-1]) + (age < -1 ? " ago" : "")) : "any";
    $("#age-text").html(ageText);
    var active = $("#active").slider('value', 0);
    $("#active-text").html(active === 0 ? "any" : (active > 0 ? "only active products" : "only dropped products"));
    var gmin = $("#gravity").slider('value', 0);
    var gmax = $("#gravity").slider('value', 1);
    $("#gravity-text").html(gmin === defaultParams.mingravity ? (gmax === defaultParams.maxgravity ? "any" : "up to " + gmax) : (gmax === defaultParams.maxgravity ? "from " + gmin : "between " + gmin + " and " + gmax));
    var delta = $("#gravitydelta").slider('value', 0);
    $("#gravitydelta-text").html(delta === 0 ? "any" : (delta > 0 ? delta + " or more" : delta + " or less"));
    var payout = $("#payout").slider('value', 0);
    $("#payout-text").html(payout === 0 ? "any" : "$" + payout + " or more");
    var comm = $("#commission").slider('value', 0);
    $("#commission-text").html(comm === 0 ? "any" : comm + "% or more");
    var pr = $("#pagerank").slider('value', 0);
    $("#pagerank-text").html(pr === 0 ? "any" : pr + " or more");
    var subscription = $("#subscription").slider('value', 0);
    $("#subscription-text").html(subscription === 0 ? "any" : (subscription > 0 ? "YES" : "NO"));
}

function updateSortingControls()
{
    var sortby = params.sortby, sortby0 = sortby;
    if (sortby.substr(0,1) === '-' || sortby.substr(0,1) === '+') {
        sortby0 = sortby0.substr(1);
    }
    $("div.sorting").removeClass('sorting-selected').find("span").html("&nbsp;");
    $("#" + sortby0 + "-sorting").addClass('sorting-selected').find("span").html(sortby.substr(0,1) === '-' ? "&#9660" : "&#9650");
}

function setControlsFromParams()
{
    var i = 0, age = params.age;
    if (age !== null && age !== '*') {
        var age0 = (age >= 0) ? age : -age-1;
        for (i = 1; i <= ageValues.length; i += 1) {
            if (ageValues[i - 1] >= age0) {
                break;
            }
        }
        if (i > ageValues.length) {
            i -= 1;
        }
        if (age < 0) {
            i = -i;
        }
    }
    $("#age").slider("moveTo", i, 0);
    $("#active").slider("moveTo", params.active, 0);
    $("#gravity").slider("moveTo", params.mingravity, 0);
    $("#gravity").slider("moveTo", params.maxgravity, 1);
    $("#gravitydelta").slider("moveTo", params.gravitydelta, 0);
    $("#payout").slider("moveTo", params.payout, 0);
    $("#commission").slider("moveTo", params.commission, 0);
    $("#pagerank").slider("moveTo", params.pagerank, 0);
    $("#subscription").slider("moveTo", params.subscription, 0);
    $("#description").val(params.description);

    $("#categories *").removeClass('selected');
    $("#cat-" + params.category).addClass('selected');

    updateSortingControls();
    updateControlTexts();
}

function joinParams(symbol)
{
    var url = "";
    for (var param in params) {
        if (param === "count") continue;
        if (param === "sortby" || params[param] !== defaultParams[param]) {
            url += param + '=' + encodeURIComponent(params[param]) + '&';
        }
    }
    if (url !== "") {
        url = symbol + url.substr(0, url.length - 1);
    }
    return url;
}

function onShowGraphsClick(id)
{
    var graph = $("#graphs-"+id);
    if (graph.parent().css("display") !== "none") {
        graph.parent().hide();
        graph.html("");
    } else {
        var captions = $("<div/>").addClass("smallgraphcaptions").html("<span>Gravity</span><span>Payout</span><span>Referred</span><span>Commission</span>")
        var graph1 = $("<img/>").attr("src", "/graph.php?id=" + id + "&data=gravity&days=31&width=160&height=120&xsteps=2&ysteps=2&bg=1");
        var graph2 = $("<img/>").attr("src", "/graph.php?id=" + id + "&data=earnedpersale&days=31&width=160&height=120&xsteps=2&ysteps=2&bg=1");
        var graph3 = $("<img/>").attr("src", "/graph.php?id=" + id + "&data=referred&days=31&width=160&height=120&xsteps=2&ysteps=2&bg=1");
        var graph4 = $("<img/>").attr("src", "/graph.php?id=" + id + "&data=commission&days=31&width=160&height=120&xsteps=2&ysteps=2&bg=1");
        graph.append(captions).append(graph1).append(graph2).append(graph3).append(graph4);
        graph.parent().show();
    }
}

function b1(column) { return (params.sortby === column || params.sortby.substr(1) === column) ? "<b>" : ""; }
function b2(column) { return (params.sortby === column || params.sortby.substr(1) === column) ? "</b>" : ""; }

function loadProducts()
{
    $(".loading span").show();
    var query = joinParams('');
    if (params.pagenumber > 0 && params.count > 0)
        query += "&count=" + params.count;
    //$("#debug").html(query);
    $.postJSON("/catalog.php", query, function(data) {
        $(".loading span").hide();
        $("#results").html("");
        var count = data[0];
        params.count = count;
        $("#pagination").pagination(count, {callback:onPaginationClick, current_page:params.pagenumber});
        $("#pagination-wrapper").show();
        $.each(data[1], function(i, item) {
            var product = $("<table/>").addClass("product").attr("id", item.Name);
            var name = $("<td/>").addClass("name").append($("<a/>").attr("href", "/products/" + item.Name + ".php").html(item.Name)).append(item.Active ? "" : " (INACTIVE)");
            var title = $("<td/>").addClass("title").html(item.Title);
            var gravity =  $("<td/>").addClass("gravity").html("Gravity: " + b1("gravity") + Math.round(item.Gravity*100)/100 + b2("gravity") + " (<span class=\"" + (item.GravityDelta > 0 ? "up" : "down") + "\">" + b1("gravitydelta") + Math.round(item.GravityDelta*100)/100 + b2("gravitydelta") + "</span>)");
            var traffic = $("<td/>").addClass("traffic").html("Traffic: " + (item.Traffic >= 0 ? (item.Traffic + (item.PageRank >= 0 ? (" (" + b1("pagerank") + "PR" + item.PageRank + b2("pagerank") + ")") : "")) : "N/A"));
            var subscription = $("<td/>").addClass("subscription").html("Subscription: " + (item.Subscription ? "$" + Math.round(item.Rebill*100)/100 : "NO"));
            var showgraphs = $("<td/>").addClass("showgraphs").attr("id", "showgraph-" + item.Name).html("show product graphs inline").click(function() { var caption = $(this).attr('id'), id = caption.substr(caption.indexOf('-')+1); onShowGraphsClick(id); });
            var graphs = $("<td/>").addClass("graphs").attr("id", "graphs-" + item.Name).each(function(){this.colSpan=2;});
            var visit = $("<td/>").addClass("visit").append($("<a/>").attr("target", "_blank").attr("href", "/landing.php?id=" + item.Name).html("visit landing page"));
            var description = $("<td/>").addClass("description").each(function(){this.rowSpan=4;}).html(item.Description);
            var payout = $("<td/>").addClass("payout").html("Payout: " + b1("payout") + "$" + Math.round(item.Payout*100)/100 + b2("payout") + " (" + b1("commission") + item.Commission + "%" + b2("commission") + ")");
            product.append($("<tr/>").append(name).append(title));
            product.append($("<tr/>").append(gravity).append(description));
            product.append($("<tr/>").append(payout));
            product.append($("<tr/>").append(subscription));
            product.append($("<tr/>").append(traffic));
            product.append($("<tr/>").append(visit).append(showgraphs));
            product.append($("<tr/>").append(graphs));
            product.appendTo("#results");
            graphs.parent().hide();
        });
        if (data.length === 0) {
            $("#results").html("No data was returned. Please adjust filters.");
        }
    });
}

var lastLocation = document.location.toString();
function checkLocationChange()
{
    if (lastLocation !== document.location.toString()) {
        getParamsFromLocation(); setLocationFromParams(); getParamsFromLocation(); setLocationFromParams();
        lastLocation = document.location.toString();
        setControlsFromParams();
        putUpdateRequest();
    }
}
window.setInterval(checkLocationChange, 100);

function setLocationFromParams()
{
    var url = document.location.toString();
    var anchor = url.indexOf('#');
    if (anchor > 0) {
        url = url.substr(0, anchor);
    }
    url += joinParams('#');
    document.location = url;
    lastLocation = url;
}

function onTimer()
{
    getParamsFromControls();
    setLocationFromParams();
    loadProducts();
}

function putUpdateRequest()
{
    window.clearTimeout(timer);
    timer = window.setTimeout(onTimer, 500);
    return true;
}

function onPaginationClick(page, container) {
    if (!initialized) return true;
    if (params.pagenumber == page) return false;
    params.pagenumber = page;
    putUpdateRequest();
    return false;
}

function onSortClick(id)
{
    var sortby = params.sortby, sortby0 = sortby;
    if (sortby.substr(0,1) === '-' || sortby.substr(0,1) === '+') {
        sortby0 = sortby0.substr(1);
    }
    if (sortby0 === id && id !== "description") {
        sortby = (sortby.substr(0,1) === '-') ? id : '-' + id;
    } else {
        sortby = '-' + id;
    }
    params.sortby = sortby;
    setControlsFromParams();
    putUpdateRequest();
}

function onSliderMove(e, ui)
{
    updateControlTexts();
    return true;
}

function onSliderChange(e, ui)
{
    if (!initialized) return true;
    params.pagenumber = 0;
    putUpdateRequest();
    return true;
}

function onDescriptionChange(e, ui)
{
    if (!initialized) return true;
    params.pagenumber = 0;
    params.sortby = "description";
    updateSortingControls();
    putUpdateRequest();
    return true;
}

function onCategorySelected(cat)
{
    if (!initialized) return true;
    params.pagenumber = 0;
    params.category = cat;
    $("#categories *").removeClass('selected');
    $("#cat-" + cat).addClass('selected');
    putUpdateRequest();
}

function onCategoryLeave()
{
    var elem = $("#cat-" + params.category);
    if (elem.is("p")) elem = elem.parent().prev();
    $(".accordion").accordion("activate", elem);
}

function onLoad()
{
    $.postJSON = function(url, data, callback) { $.post(url, data, callback, "json"); };

    initialized = false;
    defaultParams = [];
    defaultParams.age = '*';
    defaultParams.active = 0;
    defaultParams.mingravity = 0;
    defaultParams.maxgravity = 250;
    defaultParams.gravitydelta = 0;
    defaultParams.payout = 0;
    defaultParams.commission = 0;
    defaultParams.pagerank = 0;
    defaultParams.subscription = 0;
    defaultParams.description = "";
    defaultParams.category = 0;
    defaultParams.sortby = "-gravity";
    defaultParams.pagenumber = 0;

    var ages = ageNames.length;
    $("#age").slider({min: -ages, max: ages, steps: 2*ages, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#active").slider({min: -1, max: 1, steps: 2, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#gravity").slider({min: defaultParams.mingravity, max: defaultParams.maxgravity, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#gravity").slider({min: defaultParams.mingravity, max: defaultParams.maxgravity, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#gravitydelta").slider({min: -50, max: 50, steps:100, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#payout").slider({min: 0, max: 100, steps:100, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#commission").slider({min: 0, max: 100, steps:100, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#pagerank").slider({min: 0, max: 10, steps: 10, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#subscription").slider({min: -1, max: 1, steps: 2, handle: ".slider-handle", animate: false, change: onSliderChange, slide: onSliderMove});
    $("#description").keyup(onDescriptionChange);

    $(".sorting").click(function() { var caption = $(this).attr('id'), id = caption.substr(0, caption.indexOf('-')); onSortClick(id); });
    $(".sorting span").addClass('sorting-selected');

    $(".accordion").accordion({ header: "h4", autoHeight: false, animated: false, event: 'mouseclick', selectedClass: 'open' });
    $("#categories").mouseout(onCategoryLeave);

    getParamsFromLocation(); setLocationFromParams(); getParamsFromLocation(); setLocationFromParams();
    setControlsFromParams();
    initialized = true;

    putUpdateRequest();
}
google.setOnLoadCallback(onLoad);

jQuery.fn.pagination = function(maxentries, opts){
	opts = jQuery.extend({
		items_per_page:10,
		num_display_entries:5,
		current_page:0,
		num_edge_entries:2,
		link_to:"#",
		prev_text:"Prev",
		next_text:"Next",
		ellipse_text:"...",
		prev_show_always:true,
		next_show_always:true,
		callback:function(){return false;}
	},opts||{});

	return this.each(function() {
		/**
		 * Calculate the maximum number of pages
		 */
		function numPages() {
			return Math.ceil(maxentries/opts.items_per_page);
		}

		/**
		 * Calculate start and end point of pagination links depending on
		 * current_page and num_display_entries.
		 * @return {Array}
		 */
		function getInterval()  {
			var ne_half = Math.ceil(opts.num_display_entries/2);
			var np = numPages();
			var upper_limit = np-opts.num_display_entries;
			var start = current_page>ne_half?Math.max(Math.min(current_page-ne_half, upper_limit), 0):0;
			var end = current_page>ne_half?Math.min(current_page+ne_half, np):Math.min(opts.num_display_entries, np);
			return [start,end];
		}

		/**
		 * This is the event handling function for the pagination links.
		 * @param {int} page_id The new page number
		 */
		function pageSelected(page_id, evt){
			current_page = page_id;
			drawLinks();
			var continuePropagation = opts.callback(page_id, panel);
			if (!continuePropagation) {
				if (evt.stopPropagation) {
					evt.stopPropagation();
				}
				else {
					evt.cancelBubble = true;
				}
			}
			return continuePropagation;
		}

		/**
		 * This function inserts the pagination links into the container element
		 */
		function drawLinks() {
			panel.empty();
			var interval = getInterval();
			var np = numPages();
			// This helper function returns a handler function that calls pageSelected with the right page_id
			var getClickHandler = function(page_id) {
				return function(evt){ return pageSelected(page_id,evt); }
			}
			// Helper function for generating a single link (or a span tag if it's the current page)
			var appendItem = function(page_id, appendopts){
				page_id = page_id<0?0:(page_id<np?page_id:np-1); // Normalize page id to sane value
				appendopts = jQuery.extend({text:page_id+1, classes:""}, appendopts||{});
				if(page_id == current_page){
					var lnk = jQuery("<span class='current'>"+(appendopts.text)+"</span>");
				}
				else
				{
					var lnk = jQuery("<a>"+(appendopts.text)+"</a>")
						.bind("click", getClickHandler(page_id))
						.attr('href', opts.link_to.replace(/__id__/,page_id));


				}
				if(appendopts.classes){lnk.addClass(appendopts.classes);}
				panel.append(lnk);
			}
			// Generate "Previous"-Link
			if(opts.prev_text && (current_page > 0 || opts.prev_show_always)){
				appendItem(current_page-1,{text:opts.prev_text, classes:"prev"});
			}
			// Generate starting points
			if (interval[0] > 0 && opts.num_edge_entries > 0)
			{
				var end = Math.min(opts.num_edge_entries, interval[0]);
				for(var i=0; i<end; i++) {
					appendItem(i);
				}
				if(opts.num_edge_entries < interval[0] && opts.ellipse_text)
				{
					jQuery("<span>"+opts.ellipse_text+"</span>").appendTo(panel);
				}
			}
			// Generate interval links
			for(var i=interval[0]; i<interval[1]; i++) {
				appendItem(i);
			}
			// Generate ending points
			if (interval[1] < np && opts.num_edge_entries > 0)
			{
				if(np-opts.num_edge_entries > interval[1]&& opts.ellipse_text)
				{
					jQuery("<span>"+opts.ellipse_text+"</span>").appendTo(panel);
				}
				var begin = Math.max(np-opts.num_edge_entries, interval[1]);
				for(var i=begin; i<np; i++) {
					appendItem(i);
				}

			}
			// Generate "Next"-Link
			if(opts.next_text && (current_page < np-1 || opts.next_show_always)){
				appendItem(current_page+1,{text:opts.next_text, classes:"next"});
			}
		}

		// Extract current_page from options
		var current_page = parseInt(opts.current_page);
		// Create a sane value for maxentries and items_per_page
		maxentries = (!maxentries || maxentries < 0)?1:maxentries;
		opts.items_per_page = (!opts.items_per_page || opts.items_per_page < 0)?1:opts.items_per_page;
		// Store DOM element for easy access from all inner functions
		var panel = jQuery(this);
		// Attach control functions to the DOM element
		this.selectPage = function(page_id){ pageSelected(page_id);}
		this.prevPage = function(){
			if (current_page > 0) {
				pageSelected(current_page - 1);
				return true;
			}
			else {
				return false;
			}
		}
		this.nextPage = function(){
			if(current_page < numPages()-1) {
				pageSelected(current_page+1);
				return true;
			}
			else {
				return false;
			}
		}
		// When all initialisation is done, draw the links
		drawLinks();
        // call callback function
        opts.callback(current_page, this);
	});
}