/*
 * Copyright (c) 2016, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * WSO2 Inc. 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.
 */

function onRequest(context) {
    var log = new Log("stats.js");
    var carbonServer = require("carbon").server;
    var device = context.unit.params.device;
    var devicemgtProps = require("/app/modules/conf-reader/main.js")["conf"];
    var constants = require("/app/modules/constants.js");
    var websocketEndpoint = devicemgtProps["wssURL"].replace("https", "wss");
    var jwtService = carbonServer.osgiService(
        'org.wso2.carbon.identity.jwt.client.extension.service.JWTClientManagerService');
    var jwtClient = jwtService.getJWTClient();
    var encodedClientKeys = session.get(constants["ENCODED_TENANT_BASED_WEB_SOCKET_CLIENT_CREDENTIALS"]);
    var token = "";
	var user = session.get(constants.USER_SESSION_KEY);
	if (!user) {
		log.error("User object was not found in the session");
		throw constants.ERRORS.USER_NOT_FOUND;
	}

    if (encodedClientKeys) {
		var tokenUtil = require("/app/modules/oauth/token-handler-utils.js")["utils"];
		var resp = tokenUtil.decode(encodedClientKeys).split(":");
		if (user.domain == "carbon.super") {
			var tokenPair = jwtClient.getAccessToken(resp[0], resp[1], context.user.username , "default", {});
			if (tokenPair) {
				token = tokenPair.accessToken;
			}
			websocketEndpoint = websocketEndpoint + "/secured-websocket/iot.per.device.stream.virtualfirealarm.temperature/1.0.0?"
				+ "deviceId=" + device.deviceIdentifier + "&deviceType=" + device.type + "&websocketToken=" + token;
		} else {
			var tokenPair = jwtClient.getAccessToken(resp[0], resp[1], context.user.username + "@" + user.domain
				, "default", {});
			if (tokenPair) {
				token = tokenPair.accessToken;
			}
			websocketEndpoint = websocketEndpoint + "/secured-websocket/t/" + user.domain + "/iot.per.device.stream.virtualfirealarm.temperature/1.0.0?"
				+ "deviceId=" + device.deviceIdentifier + "&deviceType=" + device.type + "&websocketToken=" + token;
		}
    }
    return {"device": device, "websocketEndpoint": websocketEndpoint};
}
