var app = {
	keys : {
		ESC: 27
	},
	browser : {
		IE6 : false,
		IE7 : false,
		IE : false
	},
	// CSS support test: http://javascript.nwbox.com/CSSSupport/
	CSS : (function(global) {
	
		var sheet, style,
		doc = global.document,
		root = doc.documentElement,
		head = root.getElementsByTagName('head')[0] || root,
		impl = doc.implementation || { hasFeature: function() { return false; } },
		style = doc.createElement("style");
		
		style.type = 'text/css';
	
		head.insertBefore(style, head.firstChild);
		sheet = style.sheet || style.styleSheet;
		
		var toCamelCase = function(p) {
			if (p == 'float') {
				return 'styleFloat' in root.style ? 'styleFloat' :
					'cssFloat' in root.style ? 'cssFloat' : p;
			}
			return p.replace(/-([a-z])/g,
				function(m, c) {
					return c.toUpperCase();
				}
			);
		};
	
		return {
	
			supportAtRule: impl.hasFeature('CSS2', '') ?
				function(rule) {
					if (!(sheet && rule)) return false;
					var result = false;
					try {
						sheet.insertRule(rule, 0);
						result = !(/unknown/i).test(sheet.cssRules[0].cssText);
						sheet.deleteRule(sheet.cssRules.length - 1);
					} catch(e) { }
					return result;
				} :
				function(rule) {
					if (!(sheet && rule)) return false;
					sheet.cssText = rule;
					return sheet.cssText.length !== 0 &&
						!(/unknown/i).test(sheet.cssText) &&
						sheet.cssText.replace(/\r+|\n+/g, '').
							indexOf(rule.split(' ')[0]) === 0;
				},
	
			supportMediaQuery: impl.hasFeature('CSS2', '') ?
				function(media) {
					if (!(sheet && media)) return false;
					var result = false;
					try {
						sheet.insertRule(media, 0);
						result = !(/unknown/i).test(sheet.cssRules[0].cssText);
						sheet.deleteRule(sheet.cssRules.length - 1);
					} catch(e) { }
					return result;
				} :
				function(media) {
					if (!(sheet && media)) return false;
					sheet.cssText = media;
					return sheet.cssText.length !== 0 &&
						!(/unknown/i).test(sheet.cssText) &&
						sheet.cssText.replace(/\r+|\n+/g, '').
							indexOf(media.split(' ')[0]) === 0;
				},
	
			supportSelector: impl.hasFeature('CSS2', '') ?
				function(selector) {
					if (!(sheet && selector)) return false;
					try {
						sheet.insertRule(selector + '{ }', 0);
						sheet.deleteRule(sheet.cssRules.length - 1);
					} catch(e) { return false; }
					return true;
				} :
				function(selector) {
					if (!(sheet && selector)) return false;
					sheet.cssText = selector + ' { }';
					return sheet.cssText.length !== 0 &&
						!(/unknown/i).test(sheet.cssText) &&
						sheet.cssText.indexOf(selector) === 0;
				},
	
			supportProperty: impl.hasFeature('CSS2', '') ?
				function(property, value) {
					if (!property) return false;
					var result = false, prop = toCamelCase(property);
					if (!value && prop in root.style) {
						return typeof root.style[prop] == 'string';
					} else {
						if (!(sheet)) return false;
						try {
							sheet.insertRule('WRONG { ' + property + ': auto; }', 0);
							result = sheet.cssRules[0].cssText.
								match(/{\s*(.*)\s*}/)[1].length !== 0;
							sheet.deleteRule(sheet.cssRules.length - 1);
						} catch(e) { }
					}
					return result;
				} :
				function(property, value) {
					if (!(property && sheet)) return false;
					var name = toCamelCase(property);
					if (value) {
						sheet.addRule('div', property + ': ' + value + ';');
						return sheet.cssText.indexOf(property.toUpperCase()) > - 1;
	                }
					return name in root.style &&
						typeof root.style[name] == 'string' ||
						typeof root.style[name] == 'number';
				}
		};
	})(this),
	supportPlaceholder: function() {
	  var i = document.createElement('input');
	  return 'placeholder' in i;
	}()
};

/* IE detection */
/*@cc_on
if (@_jscript_version == 5.7 && window.XMLHttpRequest)
 app.browser.IE7 = true;
else if (@_jscript_version == 5.6 || (@_jscript_version == 5.7 && !window.XMLHttpRequest))
 app.browser.IE6 = true;
app.browser.IE = true;
@*/

// just to make things a little more readable
jQuery.fn.isPresent = function() {
  return this.length > 0;
};

$(function(){
	if ($('pre').addClass('prettyprint').length > 0) {
		$.getScript('/js/prettify.js', function() {
			prettyPrint();
		});
	}
	
	/* Check for nth-of-type */
	var articleBreak = 4;
	if(!app.CSS.supportSelector(':nth-of-type('+articleBreak+'n+1)')) {
		(function(articles) {
			if(articles.length > articleBreak) {
				articles.each(function(i) {
					if(i % articleBreak == 0) {
						$(this).css('clear','left');
					}
				});
			}	
		}($('.listing article')));	
	}
	
	/* Comment box modal */
	if($('#respond').isPresent()) {
	
		(function($respond, $body) {
			$('a.respond').click(function(evt) {
				evt.preventDefault();
				
				if(!app.supportPlaceholder) {
					$respond.addClass('noPlaceholder');
				}
				
				$respond.addClass('intermediate');
				setTimeout(function() {
					$respond.addClass('active');
				}, 50);
				
				$respond.find('input.text').first().focus();
				
				$respond.find('a.close').click(function(evt) {
					evt.preventDefault();
					close();
				});
				
				$respond.find('form').submit(function(evt) {
					close();
				});
				
				$body.keyup(function(evt) {
					if(evt.keyCode === app.keys.ESC) {
						close();
					}
				});
				
			});
			
			function close() {
				$respond.addClass('minimise')
				$respond.removeClass('active');
				setTimeout(function() {
					$respond.removeClass('intermediate minimise');
				}, 550);
				$body.unbind('keyup');
				$respond.find('a.close').unbind('click');
			}
			
		}($('#respond'), $('body')));
	}
	
	if ($('.tweet').isPresent()) {
		$.getScript("http://platform.twitter.com/widgets.js");
	}	
});