/**
 * Copyright 2013 Wolfgang Nagele
 *
 * 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 RED = require(process.env.NODE_RED_HOME+"/red/red");
var querystring = require('querystring');

function AWSCredentialsNode(n) {
    RED.nodes.createNode(this, n);
    var credentials = RED.nodes.getCredentials(n.id);
    if (credentials) {
        this.accessKey = credentials.accessKey;
        this.secretAccessKey = credentials.secretAccessKey;
    }
}
RED.nodes.registerType("aws credentials", AWSCredentialsNode);

RED.httpAdmin.get('/aws-credentials/:id', function(req, res) {
    var credentials = RED.nodes.getCredentials(req.params.id);
    if (credentials) {
        res.send(JSON.stringify({ accessKey: credentials.accessKey, secretAccessKey: credentials.secretAccessKey }));
    } else {
        res.send(JSON.stringify({}));
    }
});

RED.httpAdmin.delete('/aws-credentials/:id', function(req, res) {
    RED.nodes.deleteCredentials(req.params.id);
    res.send(200);
});

RED.httpAdmin.post('/aws-credentials/:id', function(req, res) {
    var body = "";
    req.on("data", function(chunk) {
        body += chunk;
    });
    req.on("end", function() {
        var newCreds = querystring.parse(body);
        var credentials = RED.nodes.getCredentials(req.params.id) || {};
        if (newCreds.accessKey == null || newCreds.accessKey == "") {
            delete credentials.accessKey;
        } else {
            credentials.accessKey = newCreds.accessKey || credentials.accessKey;
        }
        if (newCreds.secretAccessKey == null || newCreds.secretAccessKey == "") {
            delete credentials.secretAccessKey;
        } else {
            credentials.secretAccessKey = newCreds.secretAccessKey || credentials.secretAccessKey;
        }
        RED.nodes.addCredentials(req.params.id, credentials);
        res.send(200);
    });
});