//.CommonJS
var CSSOM = {
	StyleSheet: require("./StyleSheet").StyleSheet,
	CSSStyleRule: require("./CSSStyleRule").CSSStyleRule
};
///CommonJS


/**
 * @constructor
 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet
 */
CSSOM.CSSStyleSheet = function CSSStyleSheet() {
	CSSOM.StyleSheet.call(this);
	this.cssRules = [];
};


CSSOM.CSSStyleSheet.prototype = new CSSOM.StyleSheet;
CSSOM.CSSStyleSheet.prototype.constructor = CSSOM.CSSStyleSheet;


/**
 * Used to insert a new rule into the style sheet. The new rule now becomes part of the cascade.
 *
 *   sheet = new Sheet("body {margin: 0}")
 *   sheet.toString()
 *   -> "body{margin:0;}"
 *   sheet.insertRule("img {border: none}", 0)
 *   -> 0
 *   sheet.toString()
 *   -> "img{border:none;}body{margin:0;}"
 *
 * @param {string} rule
 * @param {number} index
 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet-insertRule
 * @return {number} The index within the style sheet's rule collection of the newly inserted rule.
 */
CSSOM.CSSStyleSheet.prototype.insertRule = function(rule, index) {
	if (index < 0 || index > this.cssRules.length) {
		throw new RangeError("INDEX_SIZE_ERR");
	}
	var cssRule = CSSOM.parse(rule).cssRules[0];
	cssRule.parentStyleSheet = this;
	this.cssRules.splice(index, 0, cssRule);
	return index;
};


/**
 * Used to delete a rule from the style sheet.
 *
 *   sheet = new Sheet("img{border:none} body{margin:0}")
 *   sheet.toString()
 *   -> "img{border:none;}body{margin:0;}"
 *   sheet.deleteRule(0)
 *   sheet.toString()
 *   -> "body{margin:0;}"
 *
 * @param {number} index within the style sheet's rule list of the rule to remove.
 * @see http://www.w3.org/TR/DOM-Level-2-Style/css.html#CSS-CSSStyleSheet-deleteRule
 */
CSSOM.CSSStyleSheet.prototype.deleteRule = function(index) {
	if (index < 0 || index >= this.cssRules.length) {
		throw new RangeError("INDEX_SIZE_ERR");
	}
	this.cssRules.splice(index, 1);
};


/**
 * NON-STANDARD
 * @return {string} serialize stylesheet
 */
CSSOM.CSSStyleSheet.prototype.toString = function() {
	var result = "";
	var rules = this.cssRules;
	for (var i=0; i<rules.length; i++) {
		result += rules[i].cssText + "\n";
	}
	return result;
};


//.CommonJS
exports.CSSStyleSheet = CSSOM.CSSStyleSheet;
CSSOM.parse = require('./parse').parse; // Cannot be included sooner due to the mutual dependency between parse.js and CSSStyleSheet.js
///CommonJS
