// Everything is wrapped in a closure to make sure we only expose select
// properties of the AssocPreviews object.
(function($){

// Pull dynamically-generated stuff out of the object into a private variable
var _context = $.context;
if (!_context) { return; }
delete $.context;

// This holds timer values for popover impressions, keyed by unique popover ID.
var _impressionTimers = new Object;

// Starts the 2-second timer that initiates popover impressions.  We do this
// because we want to wait until the popover has been open for a couple of
// seconds before we count it as an "impression".
var _start_impression_timer = function(popover_id, tag, linkCode, asin)
{
    // Request the impression image two seconds after the popover opens
    var impression_url = _context._impression
        + '/s/pp?o=' + _context._programID
        + '&t=' + tag
        + '&l=' + linkCode
        + '&asin=' + asin;
    _impressionTimers[popover_id] = setTimeout(function(){
        jQuery('#assocImpImg_'+popover_id).attr('src',impression_url);
    }, 2000);
}

var _stop_impression_timer = function(popover_id)
{
    clearTimeout(_impressionTimers[popover_id]);
}

// This is incremented with every popover attachment to provide unique IDs for
// all popovers on the page.
var _popover_id = 1;

// Defines the content of the popover and attaches it to the trigger (the link).
var _attach_popover_to_link = function(link, asin, linkCode, creative, camp)
{
    if (!link) { return; }

    var target = (link.target) ? link.target : '_blank';
    var contentURL = _context._contentURL
        + '?asin=' + asin
        + '&assoc_tag=' + _context._tag
        + '&linkCode=' + linkCode
        + '&target=' + target;
    if(creative && typeof(creative) != 'undefined'){
        contentURL += "&creative=" + creative;
    }	
    if(camp && typeof(camp) != 'undefined'){
        contentURL += "&camp=" + camp;
    }	
    var current_popover_id = _popover_id;
    _popover_id++;

    var iframe = '<iframe width="450" height="114" frameborder="0" scrolling="no" src="' + contentURL + '"></iframe>';
    var impressionImage = '<img src="" id="assocImpImg_' + current_popover_id + '" style="width:1px;height:1px;border:none;" />';

    jQuery(link).amazonPopoverTrigger({
        title:_context._img['/associates/network/amazon-logos/amazon-logo-72-b-efedd4'],
        width:467,
        skin:'classic',
        location:'auto',
        draggable:true,
        showOnHover:true,
        followLink:true,
        showCloseButton:true,
        semiStatic:true,
        hoverHideDelay:500,
        onShow:function(){_start_impression_timer(current_popover_id, _context._tag, linkCode, asin)},
        onHide:function(){_stop_impression_timer(current_popover_id)},
        literalContent:iframe + impressionImage
    });
};

// Export any public methods
$.attach = _attach_popover_to_link;

// End of closure
})(window.AssocPreviews);

// Clean up a bit...
AssocPreviews.linkList = window.amazonLinkList;
try { delete window.amazonLinkList; } catch(e) {}

// Attach popovers to marked links
for (var i = 0; i < AssocPreviews.linkList.length; i++)
{
    AssocPreviews.attach(
        AssocPreviews.linkList[i]['obj'],
        AssocPreviews.linkList[i]['asin'],
        AssocPreviews.linkList[i]['linkCode'],
	AssocPreviews.linkList[i]['creative'],
	AssocPreviews.linkList[i]['camp']
        );
}