/****************************************************************************
 Copyright (c) 2008-2010 Ricardo Quesada
 Copyright (c) 2011-2012 cocos2d-x.org
 Copyright (c) 2013-2014 Chukong Technologies Inc.

 http://www.cocos2d-x.org

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

/**
 * A SAX Parser
 * @class
 * @name cc.saxParser
 * @extends cc.Class
 */
cc.SAXParser = cc.Class.extend(/** @lends cc.saxParser# */{
    _parser: null,
    _isSupportDOMParser: null,

    /**
     * Constructor of cc.SAXParser
     */
    ctor: function () {
        if (window.DOMParser) {
            this._isSupportDOMParser = true;
            this._parser = new DOMParser();
        } else {
            this._isSupportDOMParser = false;
        }
    },

    /**
     * @function
     * @param {String} xmlTxt
     * @return {Document}
     */
    parse : function(xmlTxt){
        return this._parseXML(xmlTxt);
    },

    _parseXML: function (textxml) {
        // get a reference to the requested corresponding xml file
        var xmlDoc;
        if (this._isSupportDOMParser) {
            xmlDoc = this._parser.parseFromString(textxml, "text/xml");
        } else {
            // Internet Explorer (untested!)
            xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
            xmlDoc.async = "false";
            xmlDoc.loadXML(textxml);
        }
        return xmlDoc;
    }

});

/**
 *
 * cc.plistParser is a singleton object for parsing plist files
 * @class
 * @name cc.plistParser
 * @extends cc.SAXParser
 */
cc.PlistParser = cc.SAXParser.extend(/** @lends cc.plistParser# */{

    /**
     * parse a xml string as plist object.
     * @param {String} xmlTxt plist xml contents
     * @return {*} plist object
     */
    parse : function (xmlTxt) {
        var xmlDoc = this._parseXML(xmlTxt);
        var plist = xmlDoc.documentElement;
        if (plist.tagName != 'plist')
            throw "Not a plist file!";

        // Get first real node
        var node = null;
        for (var i = 0, len = plist.childNodes.length; i < len; i++) {
            node = plist.childNodes[i];
            if (node.nodeType == 1)
                break;
        }
        xmlDoc = null;
        return this._parseNode(node);
    },

    _parseNode: function (node) {
        var data = null, tagName = node.tagName;
        if(tagName == "dict"){
            data = this._parseDict(node);
        }else if(tagName == "array"){
            data = this._parseArray(node);
        }else if(tagName == "string"){
            if (node.childNodes.length == 1)
                data = node.firstChild.nodeValue;
            else {
                //handle Firefox's 4KB nodeValue limit
                data = "";
                for (var i = 0; i < node.childNodes.length; i++)
                    data += node.childNodes[i].nodeValue;
            }
        }else if(tagName == "false"){
            data = false;
        }else if(tagName == "true"){
            data = true;
        }else if(tagName == "real"){
            data = parseFloat(node.firstChild.nodeValue);
        }else if(tagName == "integer"){
            data = parseInt(node.firstChild.nodeValue, 10);
        }
        return data;
    },

    _parseArray: function (node) {
        var data = [];
        for (var i = 0, len = node.childNodes.length; i < len; i++) {
            var child = node.childNodes[i];
            if (child.nodeType != 1)
                continue;
            data.push(this._parseNode(child));
        }
        return data;
    },

    _parseDict: function (node) {
        var data = {};
        var key = null;
        for (var i = 0, len = node.childNodes.length; i < len; i++) {
            var child = node.childNodes[i];
            if (child.nodeType != 1)
                continue;

            // Grab the key, next noe should be the value
            if (child.tagName == 'key')
                key = child.firstChild.nodeValue;
            else
                data[key] = this._parseNode(child);                 // Parse the value node
        }
        return data;
    }

});