/**
 * Copyright (c) 2009 Dave Ross <dave@csixty4.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
 * documentation files (the "Software"), to deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the following conditions:
 *
 *   The above copyright notice and this permission notice shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
 * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR 
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 **/
 
///////////////////////
// LiveSearch
///////////////////////

function LiveSearch() {
	var resultsElement = '';
	var searchBoxes = '';
}

LiveSearch.activeRequests = new Array();

/**
 * Initialization for the live search plugin.
 * Sets up the key handler and creates the search results list.
 */
LiveSearch.init = function() {
	
	jQuery("body").append('<ul class="search_results"></ul>');
	this.resultsElement = jQuery('ul').filter('.search_results');
	this.resultsElement.hide();
	
	// Add the keypress handler
	// Using keyup because keypress doesn't recognize the backspace key
	// and that's kind of important.
	LiveSearch.searchBoxes = jQuery("input").filter("[name='s']");
	LiveSearch.searchBoxes.keyup(LiveSearch.handleKeypress);

	if(!LiveSearch.searchBoxes.outerHeight) {
		alert("Dave's WordPress Live Search requires jQuery 1.2.6 or higher. WordPress ships with current jQuery versions. But if you are seeing this message, it's likely that another plugin is including an earlier version.");
	}
	
	// Prevent browsers from doing autocomplete on the search field
	LiveSearch.searchBoxes.parents('form').attr('autocomplete', 'off');
	
	// Hide the search results when the search box loses focus
	jQuery("html").click(LiveSearch.hideResults);
	LiveSearch.searchBoxes.add(this.resultsElement).click(function(e) { e.stopPropagation(); });

	jQuery(window).resize(function() {
		var wasVisible = LiveSearch.resultsElement.is(':visible');
		LiveSearch.positionResults(this); 
		// Resizing the window was making the results visible again
		if(!wasVisible) {
			LiveSearch.resultsElement.hide(); 
		}
	});	
}

LiveSearch.positionResults = function() {
	
	// Look for the search box. Exit if there isn't one.
	if(LiveSearch.searchBoxes.size() === 0) {
		return false;
	}
		
	// Position the ul right under the search box	
	var searchBoxPosition = LiveSearch.searchBoxes.offset();
	searchBoxPosition.left += DavesWordPressLiveSearchConfig.xOffset;
	this.resultsElement.css('left', searchBoxPosition.left);
	this.resultsElement.css('display', 'block');
	
    switch(DavesWordPressLiveSearchConfig.resultsDirection)
    {
    	case 'up':
    		var topOffset = searchBoxPosition.top - this.resultsElement.height();
    		break;
    	case 'down':
    	default:
    		var topOffset = searchBoxPosition.top + LiveSearch.searchBoxes.outerHeight();
    }
	
	this.resultsElement.css('top', topOffset + 'px');
};

/**
 * Process the search results that came back from the AJAX call
 */
LiveSearch.handleAJAXResults = function(e) {

    LiveSearch.activeRequests.pop();

    if(e) {
        resultsSearchTerm = e.searchTerms;
        if(resultsSearchTerm != LiveSearch.searchBoxes.val()) {

                if(LiveSearch.activeRequests.length == 0) {
                        LiveSearch.removeIndicator();
                }

                return;
        }

        var resultsShownFor = jQuery("ul").filter(".search_results").children("input[name=query]").val();
        if(resultsShownFor != "" && resultsSearchTerm == resultsShownFor)
        {
                if(LiveSearch.activeRequests.length == 0) {
                        LiveSearch.removeIndicator();
                }

                return;
        }

        var searchResultsList = jQuery("ul").filter(".search_results");
        searchResultsList.empty();
        searchResultsList.append('<input type="hidden" name="query" value="' + resultsSearchTerm + '" />');

        if(e.results.length == 0) {
                // Hide the search results, no results to show
                LiveSearch.hideResults();
        }
        else {
                for(var postIndex = 0; postIndex < e.results.length; postIndex++) {
                        var searchResult = e.results[postIndex];
                        if(searchResult.post_title !== undefined) {



                                var renderedResult = '';

                                // Thumbnails
                                if(DavesWordPressLiveSearchConfig.showThumbs && searchResult.attachment_thumbnail) {
                                        var liClass = "post_with_thumb";
                                }
                                else {
                                        var liClass = "";
                                }

                                renderedResult += '<li class="' + liClass + '">';

                                // Render thumbnail
                                if(DavesWordPressLiveSearchConfig.showThumbs && searchResult.attachment_thumbnail) {
                                        renderedResult += '<img src="' + searchResult.attachment_thumbnail + '" class="post_thumb" />';
                                }

                                renderedResult += '<a href="' + searchResult.permalink + '">' + searchResult.post_title + '</a>';

                                if(searchResult.post_price != undefined) { renderedResult += '<p class="price">' + searchResult.post_price + '</p>'; }
                                
                                if(DavesWordPressLiveSearchConfig.showExcerpt && searchResult.post_excerpt) {
                                        renderedResult += '<p class="excerpt clearfix">' + searchResult.post_excerpt + '</p>';
                                }

                                if(e.displayPostMeta) {
                                        renderedResult += '<p class="meta clearfix" id="daves-wordpress-live-search_author">Posted by ' + searchResult.post_author_nicename + '</p><p id="daves-wordpress-live-search_date" class="meta clearfix">' + searchResult.post_date + '</p>';
                                }
                                renderedResult += '<div class="clearfix"></div></li>';
                                searchResultsList.append(renderedResult);
                        }
                }

				if(searchResult.show_more != undefined && searchResult.show_more) {
	                // "more" link
	                searchResultsList.append('<div class="clearfix search_footer"><a href="' + DavesWordPressLiveSearchConfig.blogURL + '/?s=' + resultsSearchTerm + '">View more results</a></div>');
				}

                // Show the search results
                LiveSearch.showResults();

        }

        if(LiveSearch.activeRequests.length == 0) {
                LiveSearch.removeIndicator();
        }
    }
};

/**
 * Keypress handler. Sets up a 0 sec. timeout which then
 * kicks off the actual query.s
 */
LiveSearch.handleKeypress = function(e) {
	var delayTime = 0;
	var term = LiveSearch.searchBoxes.val();
	setTimeout( function() { LiveSearch.runQuery(term); }, delayTime);
};

/**
 * Do the AJAX request for search results, or hide the search results
 * if the search box is empty.
 */
LiveSearch.runQuery = function(terms) {
	
	var srch=LiveSearch.searchBoxes.val();
	if(srch === "" || srch.length < DavesWordPressLiveSearchConfig.minCharsToSearch) {
		// Nothing entered. Hide the autocomplete.
		LiveSearch.hideResults();
		LiveSearch.removeIndicator();
	}
	else {
		// Do an autocomplete lookup
		LiveSearch.displayIndicator();
		
		// Clear out the old requests in the queue
		while(LiveSearch.activeRequests.length > 0)
		{
			var req = LiveSearch.activeRequests.pop();
			req.abort();
		}
		// do AJAX query
		//var currentSearch = jQuery("input[name='s']").val();
		var currentSearch = terms;
		var parameters = {s: currentSearch};
                var searchSource = jQuery("input").filter("[name='search_source']").val();
                if(searchSource != undefined) {
                    parameters.search_source = searchSource;
                }
        
        // For wp_ajax
		parameters.action = "dwls_search";
		
		var ajaxURL = DavesWordPressLiveSearchConfig.blogURL + "/wp-admin/admin-ajax.php";
		var req = jQuery.get( ajaxURL, parameters, LiveSearch.handleAJAXResults, "json");
		
		// Add this request to the queue
		LiveSearch.activeRequests.push(req);
	}
};

LiveSearch.hideResults = function() {
	switch(DavesWordPressLiveSearchConfig.resultsDirection)
	{
		case 'up':
			jQuery("ul").filter(".search_results:visible").fadeOut();
			return;
		case 'down':
		default:
			jQuery("ul").filter(".search_results:visible").slideUp();
			return;
	}
};

LiveSearch.showResults = function() {

	this.positionResults();
	
	switch(DavesWordPressLiveSearchConfig.resultsDirection)
	{
		case 'up':
			jQuery("ul").filter(".search_results:hidden").fadeIn();
			return;
		case 'down':
		default:
			jQuery("ul").filter(".search_results:hidden").slideDown();	
			return;
	}
};

/**
 * Display the "spinning wheel" AJAX activity indicator
 */
LiveSearch.displayIndicator = function() {
	
	if(jQuery("#search_results_activity_indicator").size() === 0) {

		jQuery("body").append('<img id="search_results_activity_indicator" src="' + DavesWordPressLiveSearchConfig.indicatorURL + '" />');

		var searchBoxPosition = LiveSearch.searchBoxes.offset();

		jQuery("#search_results_activity_indicator").css('position', 'absolute');
		
		var indicatorY = (searchBoxPosition.top + ((LiveSearch.searchBoxes.outerHeight() - LiveSearch.searchBoxes.innerHeight()) / 2) + 'px');
		
		jQuery("#search_results_activity_indicator").css('top', indicatorY);

		var indicatorX = (searchBoxPosition.left + LiveSearch.searchBoxes.outerWidth() - DavesWordPressLiveSearchConfig.indicatorWidth - 2) + 'px';
						
		jQuery("#search_results_activity_indicator").css('left', indicatorX);
	}
};

/**
 * Hide the "spinning wheel" AJAX activity indicator
 */
LiveSearch.removeIndicator = function() {
	jQuery("#search_results_activity_indicator").remove();
};

/////////////
// Utilities
/////////////
LiveSearch.util = {};

/**
 * Returns the filename component of the path.
 * Used here to help find this script's <script> tag
 * @see http://phpjs.org/functions/basename
 * @see http://www.experts-exchange.com/Programming/Languages/Scripting/JavaScript/Q_24662495.html
 * @return string
 */
LiveSearch.util.basename = function(path, suffix) {
    // Returns the filename component of the path  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/basename
    // +   original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // +   improved by: Ash Searle (http://hexmen.com/blog/)
    // +   improved by: Lincoln Ramsay
    // +   improved by: djmix
    // *     example 1: basename('/www/site/home.htm', '.htm');
    // *     returns 1: 'home'
    var b = path.replace(/^.*[\/\\]/g, '');
    
    if (typeof(suffix) == 'string' && b.substr(b.length-suffix.length) == suffix) {
        b = b.substr(0, b.length-suffix.length);
    }
    
    return b;
}

///////////////////
// Initialization
///////////////////

jQuery(function() {
	LiveSearch.init();
});