/*
 * Licensed 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.
 *
*/
/* jshint sub:true */

var path = require('path');
var ConfigFile = require('./ConfigFile');

/******************************************************************************
* ConfigKeeper class
*
* Used to load and store config files to avoid re-parsing and writing them out
* multiple times.
*
* The config files are referred to by a fake path constructed as
* project_dir/platform/file
* where file is the name used for the file in config munges.
******************************************************************************/
function ConfigKeeper (project_dir, plugins_dir) {
    this.project_dir = project_dir;
    this.plugins_dir = plugins_dir;
    this._cached = {};
}

ConfigKeeper.prototype.get = function ConfigKeeper_get (project_dir, platform, file) {
    var self = this;

    // This fixes a bug with older plugins - when specifying config xml instead of res/xml/config.xml
    // https://issues.apache.org/jira/browse/CB-6414
    if (file === 'config.xml' && platform === 'android') {
        file = 'res/xml/config.xml';
    }
    var fake_path = path.join(project_dir, platform, file);

    if (self._cached[fake_path]) {
        return self._cached[fake_path];
    }
    // File was not cached, need to load.
    var config_file = new ConfigFile(project_dir, platform, file);
    self._cached[fake_path] = config_file;
    return config_file;
};

ConfigKeeper.prototype.save_all = function ConfigKeeper_save_all () {
    var self = this;
    Object.keys(self._cached).forEach(function (fake_path) {
        var config_file = self._cached[fake_path];
        if (config_file.is_changed) config_file.save();
    });
};

module.exports = ConfigKeeper;