var fc = $.fullCalendar = { version: "<%= meta.version %>" };
var fcViews = fc.views = {};


$.fn.fullCalendar = function(options) {
	var args = Array.prototype.slice.call(arguments, 1); // for a possible method call
	var res = this; // what this function will return (this jQuery object by default)

	this.each(function(i, _element) { // loop each DOM element involved
		var element = $(_element);
		var calendar = element.data('fullCalendar'); // get the existing calendar object (if any)
		var singleRes; // the returned value of this single method call

		// a method call
		if (typeof options === 'string') {
			if (calendar && $.isFunction(calendar[options])) {
				singleRes = calendar[options].apply(calendar, args);
				if (!i) {
					res = singleRes; // record the first method call result
				}
				if (options === 'destroy') { // for the destroy method, must remove Calendar object data
					element.removeData('fullCalendar');
				}
			}
		}
		// a new calendar initialization
		else if (!calendar) { // don't initialize twice
			calendar = new Calendar(element, options);
			element.data('fullCalendar', calendar);
			calendar.render();
		}
	});
	
	return res;
};


// function for adding/overriding defaults
function setDefaults(d) {
	mergeOptions(defaults, d);
}


// Recursively combines option hash-objects.
// Better than `$.extend(true, ...)` because arrays are not traversed/copied.
//
// called like:
//     mergeOptions(target, obj1, obj2, ...)
//
function mergeOptions(target) {

	function mergeIntoTarget(name, value) {
		if ($.isPlainObject(value) && $.isPlainObject(target[name]) && !isForcedAtomicOption(name)) {
			// merge into a new object to avoid destruction
			target[name] = mergeOptions({}, target[name], value); // combine. `value` object takes precedence
		}
		else if (value !== undefined) { // only use values that are set and not undefined
			target[name] = value;
		}
	}

	for (var i=1; i<arguments.length; i++) {
		$.each(arguments[i], mergeIntoTarget);
	}

	return target;
}


// overcome sucky view-option-hash and option-merging behavior messing with options it shouldn't
function isForcedAtomicOption(name) {
	// Any option that ends in "Time" or "Duration" is probably a Duration,
	// and these will commonly be specified as plain objects, which we don't want to mess up.
	return /(Time|Duration)$/.test(name);
}
// FIX: find a different solution for view-option-hashes and have a whitelist
// for options that can be recursively merged.