/**
 * Copyright OpenJS Foundation and other contributors, https://openjsf.org/
 *
 * 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.
 **/

var path = require("path");
var fs = require("fs");

var userHome = process.env.HOME || process.env.USERPROFILE || process.env.HOMEPATH || process.env.NODE_RED_HOME;
var configDir = path.join(userHome, ".node-red");
var configFile = path.join(configDir, ".cli-config.json");

var config;

function load() {
    if (config === null || typeof config === "undefined") {
        try {
            config = JSON.parse(fs.readFileSync(configFile));
        } catch (err) {
            config = {};
        }
    }
}

function save() {
    try {
        fs.mkdirSync(configDir);
    } catch (err) {
        if (err.code != "EEXIST") {
            throw err;
        }
    }
    fs.writeFileSync(configFile, JSON.stringify(config, null, 4));
}
module.exports = {
    init: function(userDir) {
        configDir = userDir;
        configFile = path.join(configDir, ".cli-config.json");
    },
    unload: function() {
        config = null;
    }
};

var properties = [
    {name:"target",default:"http://localhost:1880"},
    {name:"tokens"}
];

properties.forEach(function(prop) {
    module.exports[prop.name] = function(arg) {
        load();
        if (arg === undefined) {
            return config[prop.name] || prop.default;
        } else if (arg === null) {
            delete config[prop.name];
        } else {
            config[prop.name] = arg;
        }
        save();
    };
});