var MT_PATH = '/cgi-bin/movabletype/mt.cgi';
var DEFAULT_BLOG_ID = 1;
var EDIT_LINK_TEXT = 'Edit';

ready();

function ready() {
	var editor  = getQueryVar('editor')  || (getCookie('editor')  > 0);
	var editing = getQueryVar('editing') || (getCookie('editing') > 0);
	
	if (editor && !getCookie('editor')) {
		setCookie('editor', 1);
	};
	if (editing) {
		$(document.body).addClass('editing');
	};
	if (editor || editing) {
		insertToggler(editing);
		insertEditLinks();
	};

}

function getQueryVar (name) {
	var matches, r;
	if (!location.search) {
		return false;
	};
	r = new RegExp('\\b' + name + '=([\\w]+)\\b');
	matches = location.search.match(r);
	return (matches && matches[1]) || false;
}

function setCookie (name, value) {
	$.cookie( name, value, { expires: 100, path: '/' } );
}

function getCookie (name, dataType) {
	if (! document.cookie) return;
	if (! dataType) {
		dataType = String;
	};
	return dataType( $.cookie(name) );
}

function insertEditLinks() {
	var classPattern = /(entry|template)-([0-9]+)/;
	var blogIdPattern = /blog-([0-9])+/;
	var matches, blog_id, root;
	
	blog_id = $('meta[name="blog_id"][content]:last').attr('content') || DEFAULT_BLOG_ID;
	root = $('.blog');
	root = root.length ? root : $(document.body);
	
	root.each( function () {
		blog_id = [].concat(this.className.match(blogIdPattern))[1] || blog_id;
		$('.entry, .template',/* context */this).each( function () {
			matches = this.getAttribute('class').match(classPattern);
			if ( matches && matches[1] && matches[2] ) {
				$(this).prepend( editLinkString( matches[1], matches[2], blog_id ) );
			}
		});
	});
}

function insertToggler(editing) {
	$(document.body).prepend('<label id="edit-toggle"><input type="checkbox" /> Show edit links</label>');
	$("#edit-toggle input:first")[0].checked = Boolean(editing);
	$("#edit-toggle input:first").bind('change',function () {
		var editing = 0 + this.checked;
		$(document.body).toggleClass('editing');
		setCookie('editing', editing);
	});
}

function editLinkString(type, id, blog) {
	blog = blog || DEFAULT_BLOG_ID;
	return "<a href='" + MT_PATH + "?__mode=view&_type=" + type + "&id=" + id + "&blog_id=" + blog + "' class='edit'>" + EDIT_LINK_TEXT + "</a>";
}

/*
 * 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;
            }

            /* When appear is triggered load original image. */
            $(self).one("appear", function() {
                if (!this.loaded) {
                    $("<img />")
                        .bind("load", function() {
                            $(self)
                                .hide()
                                .attr("src", $(self).attr("original"))
                                [settings.effect](settings.effectspeed);
                            self.loaded = true;
                        })
                        .attr("src", $(self).attr("original"));
                };
            });

            /* 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);