/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 *
*/

// Map of fsName -> FileSystem.
var fsMap = null;
var FileSystem = require('./FileSystem');
var exec = require('cordova/exec');

// Overridden by Android, BlackBerry 10 and iOS to populate fsMap.
require('./fileSystems').getFs = function(name, callback) {
    if (fsMap) {
        callback(fsMap[name]);
    } else {
        exec(success, null, "File", "requestAllFileSystems", []);
        function success(response) {
            fsMap = {};
            for (var i = 0; i < response.length; ++i) {
                var fsRoot = response[i];
                var fs = new FileSystem(fsRoot.filesystemName, fsRoot);
                fsMap[fs.name] = fs;
            }
            callback(fsMap[name]);
        }
    }
};