fc.applyAll = applyAll;



// Create an object that has the given prototype.
// Just like Object.create
function createObject(proto) {
	var f = function() {};
	f.prototype = proto;
	return new f();
}

// copy specifically-owned (non-protoype) properties of `b` onto `a`
function extend(a, b) {
	for (var i in b) {
		if (b.hasOwnProperty(i)) {
			a[i] = b[i];
		}
	}
}



/* Date
-----------------------------------------------------------------------------*/


var dayIDs = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];


// diffs the two moments into a Duration where full-days are recorded first,
// then the remaining time.
function dayishDiff(d1, d0) {
	return moment.duration({
		days: d1.clone().stripTime().diff(d0.clone().stripTime(), 'days'),
		ms: d1.time() - d0.time()
	});
}


function isNativeDate(input) {
	return  Object.prototype.toString.call(input) === '[object Date]' ||
		input instanceof Date;
}



/* Event Element Binding
-----------------------------------------------------------------------------*/


function lazySegBind(container, segs, bindHandlers) {
	container.unbind('mouseover').mouseover(function(ev) {
		var parent=ev.target, e,
			i, seg;
		while (parent != this) {
			e = parent;
			parent = parent.parentNode;
		}
		if ((i = e._fci) !== undefined) {
			e._fci = undefined;
			seg = segs[i];
			bindHandlers(seg.event, seg.element, seg);
			$(ev.target).trigger(ev);
		}
		ev.stopPropagation();
	});
}



/* Element Dimensions
-----------------------------------------------------------------------------*/


function setOuterWidth(element, width, includeMargins) {
	for (var i=0, e; i<element.length; i++) {
		e = $(element[i]);
		e.width(Math.max(0, width - hsides(e, includeMargins)));
	}
}


function setOuterHeight(element, height, includeMargins) {
	for (var i=0, e; i<element.length; i++) {
		e = $(element[i]);
		e.height(Math.max(0, height - vsides(e, includeMargins)));
	}
}


function hsides(element, includeMargins) {
	return hpadding(element) + hborders(element) + (includeMargins ? hmargins(element) : 0);
}


function hpadding(element) {
	return (parseFloat($.css(element[0], 'paddingLeft', true)) || 0) +
	       (parseFloat($.css(element[0], 'paddingRight', true)) || 0);
}


function hmargins(element) {
	return (parseFloat($.css(element[0], 'marginLeft', true)) || 0) +
	       (parseFloat($.css(element[0], 'marginRight', true)) || 0);
}


function hborders(element) {
	return (parseFloat($.css(element[0], 'borderLeftWidth', true)) || 0) +
	       (parseFloat($.css(element[0], 'borderRightWidth', true)) || 0);
}


function vsides(element, includeMargins) {
	return vpadding(element) +  vborders(element) + (includeMargins ? vmargins(element) : 0);
}


function vpadding(element) {
	return (parseFloat($.css(element[0], 'paddingTop', true)) || 0) +
	       (parseFloat($.css(element[0], 'paddingBottom', true)) || 0);
}


function vmargins(element) {
	return (parseFloat($.css(element[0], 'marginTop', true)) || 0) +
	       (parseFloat($.css(element[0], 'marginBottom', true)) || 0);
}


function vborders(element) {
	return (parseFloat($.css(element[0], 'borderTopWidth', true)) || 0) +
	       (parseFloat($.css(element[0], 'borderBottomWidth', true)) || 0);
}



/* Misc Utils
-----------------------------------------------------------------------------*/


//TODO: arraySlice
//TODO: isFunction, grep ?


function noop() { }


function dateCompare(a, b) { // works with moments too
	return a - b;
}


function arrayMax(a) {
	return Math.max.apply(Math, a);
}


function smartProperty(obj, name) { // get a camel-cased/namespaced property of an object
	obj = obj || {};
	if (obj[name] !== undefined) {
		return obj[name];
	}
	var parts = name.split(/(?=[A-Z])/),
		i=parts.length-1, res;
	for (; i>=0; i--) {
		res = obj[parts[i].toLowerCase()];
		if (res !== undefined) {
			return res;
		}
	}
	return obj['default'];
}


function htmlEscape(s) {
	return (s + '').replace(/&/g, '&amp;')
		.replace(/</g, '&lt;')
		.replace(/>/g, '&gt;')
		.replace(/'/g, '&#039;')
		.replace(/"/g, '&quot;')
		.replace(/\n/g, '<br />');
}


function stripHTMLEntities(text) {
	return text.replace(/&.*?;/g, '');
}


function disableTextSelection(element) {
	element
		.attr('unselectable', 'on')
		.css('MozUserSelect', 'none')
		.bind('selectstart.ui', function() { return false; });
}


/*
function enableTextSelection(element) {
	element
		.attr('unselectable', 'off')
		.css('MozUserSelect', '')
		.unbind('selectstart.ui');
}
*/


function markFirstLast(e) { // TODO: use CSS selectors instead
	e.children()
		.removeClass('fc-first fc-last')
		.filter(':first-child')
			.addClass('fc-first')
		.end()
		.filter(':last-child')
			.addClass('fc-last');
}


function getSkinCss(event, opt) {
	var source = event.source || {};
	var eventColor = event.color;
	var sourceColor = source.color;
	var optionColor = opt('eventColor');
	var backgroundColor =
		event.backgroundColor ||
		eventColor ||
		source.backgroundColor ||
		sourceColor ||
		opt('eventBackgroundColor') ||
		optionColor;
	var borderColor =
		event.borderColor ||
		eventColor ||
		source.borderColor ||
		sourceColor ||
		opt('eventBorderColor') ||
		optionColor;
	var textColor =
		event.textColor ||
		source.textColor ||
		opt('eventTextColor');
	var statements = [];
	if (backgroundColor) {
		statements.push('background-color:' + backgroundColor);
	}
	if (borderColor) {
		statements.push('border-color:' + borderColor);
	}
	if (textColor) {
		statements.push('color:' + textColor);
	}
	return statements.join(';');
}


function applyAll(functions, thisObj, args) {
	if ($.isFunction(functions)) {
		functions = [ functions ];
	}
	if (functions) {
		var i;
		var ret;
		for (i=0; i<functions.length; i++) {
			ret = functions[i].apply(thisObj, args) || ret;
		}
		return ret;
	}
}


function firstDefined() {
	for (var i=0; i<arguments.length; i++) {
		if (arguments[i] !== undefined) {
			return arguments[i];
		}
	}
}