/*
 * Lazy Load - jQuery plugin for lazy loading images
 *
 * Copyright (c) 2007-2009 Mika Tuupola
 *
 * Licensed under the MIT license:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Project home:
 *   http://www.appelsiini.net/projects/lazyload
 *
 * Version:  1.5.0
 *
 */
(function($) {

    $.fn.lazyload = function(options) {
        var settings = {
            threshold    : 0,
            failurelimit : 0,
            event        : "scroll",
            effect       : "show",
            container    : window
        };
                
        if(options) {
            $.extend(settings, options);
        }

        /* Fire one scroll event per scroll. Not one scroll event per image. */
        var elements = this;
        if ("scroll" == settings.event) {
            $(settings.container).bind("scroll", function(event) {
                
                var counter = 0;
                elements.each(function() {
                    if ($.abovethetop(this, settings) ||
                        $.leftofbegin(this, settings)) {
                            /* Nothing. */
                    } else if (!$.belowthefold(this, settings) &&
                        !$.rightoffold(this, settings)) {
                            $(this).trigger("appear");
                    } else {
                        if (counter++ > settings.failurelimit) {
                            return false;
                        }
                    }
                });
                /* Remove image from array so it is not looped next time. */
                var temp = $.grep(elements, function(element) {
                    return !element.loaded;
                });
                elements = $(temp);
            });
        }
        
        this.each(function() {
            var self = this;
            
            /* Save original only if it is not defined in HTML. */
            if (undefined == $(self).attr("original")) {
                $(self).attr("original", $(self).attr("src"));     
            }

            if ("scroll" != settings.event || 
                    undefined == $(self).attr("src") || 
                    settings.placeholder == $(self).attr("src") || 
                    ($.abovethetop(self, settings) ||
                     $.leftofbegin(self, settings) || 
                     $.belowthefold(self, settings) || 
                     $.rightoffold(self, settings) )) {
                        
                if (settings.placeholder) {
                    $(self).attr("src", settings.placeholder);      
                } else {
                    $(self).removeAttr("src");
                }
                self.loaded = false;
            } else {
                self.loaded = true;
            }
            

			var $img = $( self ) ;
			var src = $img.attr( 'original' ) ; 


            /* When appear is triggered load original image. */
            $(self).one("appear", function() {
                if (!this.loaded) {
                    
				
					if ($.browser.msie && $.browser.version=="6.0") {
                      // has to have the 'style=""', it handls IE6 bug
                      // if removed, IE6 can't show the tooltip in correct size sometimes
                      var preview = $('<img style="" />'); 
                    } else {
                      var preview = $('<img />');
                    }
                    // has to compose tooltip after the preview image been loaded
                    preview.load(function() {                                            
                      var naturalWidth = this.width ;
                      var naturalHeight = this.height ;
//alert( naturalWidth + 'x' + naturalHeight );

                      if (naturalWidth > maxWidth) {
                        naturalHeight = Math.floor(naturalHeight / naturalWidth * maxWidth);
                        naturalWidth = maxWidth;                          
                      }

					  if ( naturalHeight > maxHeight ) {
					  	naturalHeight = maxHeight ;
						naturalWidth = Math.floor( naturalWidth / naturalHeight * maxHeight ) ;
					  }

                      $img.attr( { width: naturalWidth, height: naturalHeight }).css({ width: naturalWidth, height: naturalHeight }).attr( 'src', this.src ) ;

					  //calc marginss we need to fit maxWidth x maxHeight nicely
					  var topMargin = Math.floor( ( maxHeight + 4 - naturalHeight ) / 2 ) ;
					  var bottomMargin = maxHeight + 4 - naturalHeight - topMargin ;

					  var leftMargin = Math.floor( ( maxWidth + 4 - naturalWidth ) / 2 )  ;
					  var rightMargin = maxWidth + 4 - naturalWidth - leftMargin ;

					  $img.css( {paddingTop: topMargin, paddingBottom: bottomMargin, paddingLeft: leftMargin, paddingRight: rightMargin } )  ;

					  $img.attr( 'loaded', true ) ;

					var tooltip_init = function() {
					  var $current_image = $img ; //(this);
            $img.tooltip({
              tip: '#tooltip' ,
              position: 'center left',
              offset: [-2, 3],
              lazy: false,
              delay: 30,
              opacity: 1,
              predelay: 100,
              events: {
                def: 'mouseenter, mouseleave'
              },
              onBeforeShow: function(event) {
			  var $tooltip = $('#tooltip');

                var large_preview_src = $current_image.attr('large_preview');
                var large_preview = $('body #large_preview_cache img[src$="' + large_preview_src + '"]:first');                
                if(large_preview.length == 0 || !large_preview.data('complete')) {
                  // if the image for large_preview has not been loaded into DOM
                  // need to load it into DOM
                  if(large_preview.length == 0) {
                    if ($.browser.msie && $.browser.version=="6.0") {
                      // has to have the 'style=""', it handls IE6 bug
                      // if removed, IE6 can't show the tooltip in correct size sometimes
                      var large_preview = $('<img style="" />'); 
                    } else {
                      var large_preview = $('<img />');
                    }
                    // has to compose tooltip after the preview image been loaded
                    large_preview.load(function() {                                            
                      var naturalWidth = this.width;
                      var naturalHeight = this.height;
                      if (naturalWidth > maxPreviewWidth) {
                        naturalHeight = Math.floor(naturalHeight / naturalWidth * maxPreviewWidth);
                        naturalWidth = maxPreviewWidth;                          
                      }
                      $(this).attr({ width: naturalWidth, height: naturalHeight }).css({ width: naturalWidth, height: naturalHeight });
                      $(this).data('complete', true);
                    });
                    $(large_preview).attr('src', large_preview_src);
                    $('body #large_preview_cache').append(large_preview);                
                  }
                  $current_image.closest('.car_image').addClass('loading');
                  $current_image.closest('.hotel_image').addClass('loading');

                  loaderTimeout = setTimeout(function() { $current_image.data('tooltip').show(); }, 1000);
                  // prevent the tooltip from showing when the large previe image is not ready                                        
                  event.isDefaultPrevented = function() { return true }           
                } else {   
                  width = $(large_preview).css('width');
                  if ($.browser.msie && $.browser.version=="6.0") {
                    // need to be a even number for IE6, don't know why
                    // also need to ceil the value
                    width = Math.ceil(parseFloat(width));
                    width = (width % 2 == 0 ? width : width + 1);
				  }
                  $tooltip.css({ width: width });
                  $tooltip.find('img').replaceWith(large_preview.clone());
                  $tooltip.find('img').show();
                  $current_image.closest('.car_image').removeClass('loading');               
                  $current_image.closest('.hotel_image').removeClass('loading');               
                }
              }
            });
					}
					  $img.each( tooltip_init ) ; 
                    });

                    $(preview).attr('src', src);
                    $('body #preview_cache').append(preview);                

/*					

                    $("<img />")
                        .bind("load", function() {
                            $(self)
                                .hide()
                                .attr("src", $(self).attr("original"))
                                [settings.effect](settings.effectspeed);
                            self.loaded = true;
//				alert( $(self).attr('width'));
                        })
                        .attr("src", $(self).attr("original"));


					setTimeout( function() { 
						
						if ( self.loaded) {

						var width = self.width ;
						var height = self.height ;
alert( width+ ' x ' + height )  ;
//alert($(self).attr('src'));
						//it didnt get loaded -- replace it with original
//						$(self)
//							.attr( 'src', $(self).attr('default') )

						;

						
						}
						}, 1000 )  ;
*/


                };


            });

            /* When wanted event is triggered load original image */
            /* by triggering appear.                              */
            if ("scroll" != settings.event) {
                $(self).bind(settings.event, function(event) {
                    if (!self.loaded) {
                        $(self).trigger("appear");
                    }
                });
            }
        });
        
        /* Force initial check if images should appear. */
        $(settings.container).trigger(settings.event);
        
        return this;

    };

    /* Convenience methods in jQuery namespace.           */
    /* Use as  $.belowthefold(element, {threshold : 100, container : window}) */

    $.belowthefold = function(element, settings) {
        if (settings.container === undefined || settings.container === window) {
            var fold = $(window).height() + $(window).scrollTop();
        } else {
            var fold = $(settings.container).offset().top + $(settings.container).height();
        }
        return fold <= $(element).offset().top - settings.threshold;
    };
    
    $.rightoffold = function(element, settings) {
        if (settings.container === undefined || settings.container === window) {
            var fold = $(window).width() + $(window).scrollLeft();
        } else {
            var fold = $(settings.container).offset().left + $(settings.container).width();
        }
        return fold <= $(element).offset().left - settings.threshold;
    };
        
    $.abovethetop = function(element, settings) {
        if (settings.container === undefined || settings.container === window) {
            var fold = $(window).scrollTop();
        } else {
            var fold = $(settings.container).offset().top;
        }
        return fold >= $(element).offset().top + settings.threshold  + $(element).height();
    };
    
    $.leftofbegin = function(element, settings) {
        if (settings.container === undefined || settings.container === window) {
            var fold = $(window).scrollLeft();
        } else {
            var fold = $(settings.container).offset().left;
        }
        return fold >= $(element).offset().left + settings.threshold + $(element).width();
    };
    /* Custom selectors for your convenience.   */
    /* Use as $("img:below-the-fold").something() */

    $.extend($.expr[':'], {
        "below-the-fold" : "$.belowthefold(a, {threshold : 0, container: window})",
        "above-the-fold" : "!$.belowthefold(a, {threshold : 0, container: window})",
        "right-of-fold"  : "$.rightoffold(a, {threshold : 0, container: window})",
        "left-of-fold"   : "!$.rightoffold(a, {threshold : 0, container: window})"
    });
    
})(jQuery);