/* jshint esversion: 6 */

const sockjs = require('sockjs');
var config;
try {
    config = require('./config');
} catch (e) {
    console.log("You can customize the configuration by copying config.example.js to config.js");
    config = require('./config.example');
}
var origin = config.httpUnsafeOrigin || 'http://localhost:3000/';

module.exports.install = function(server, callbackFunction) {
    var sockjs_opts = {sockjs_url: ""},
    sockjs_echo = sockjs.createServer(sockjs_opts);
    //urlParse = new RegExp("^/common/onlyoffice/doc/([0-9-.a-zA-Z_=]*)/c.+", 'i');

    console.log("Start ooserver");
    console.log("Port " + sockjs_echo.port);

    function getBaseUrl(protocol, hostHeader, forwardedProtoHeader, forwardedHostHeader) {
        var url = '';
        if (forwardedProtoHeader) {
            url += forwardedProtoHeader;
        } else if (protocol) {
            url += protocol;
        } else {
            url += 'http';
        }
        url += '://';
        if (forwardedHostHeader) {
            url += forwardedHostHeader;
        } else if (hostHeader) {
            url += hostHeader;
        } else {
            url += origin.slice(0, -1);
        }
        return url;
    }
    function getBaseUrlByConnection(conn) {
        return getBaseUrl('', conn.headers['host'], conn.headers['x-forwarded-proto'], conn.headers['x-forwarded-host']);
    }

    function sendData(conn, data) {
        conn.write(JSON.stringify(data));
    }
    //function sendDataWarning(conn, msg) { sendData(conn, {type: "warning", message: msg}); }
    //function sendDataMessage(conn, msg) { sendData(conn, {type: "message", messages: msg}); }

    sockjs_echo.on('connection', function(conn) {
        console.log("ooserver in connection");
        if (null === conn) {
            console.log("null == conn");
            return;
        }
        conn.baseUrl = getBaseUrlByConnection(conn);
        console.log("BaseUrl: " + conn.baseUrl);
        conn.sessionIsSendWarning = false;
        conn.sessionTimeConnect = conn.sessionTimeLastAction = new Date().getTime();
        console.log("ooserver setting handlers");
        conn.on('data', function(message) {
            console.log("In data");
            var data;
            try {
                console.log("Received: " + message);
                data = JSON.parse(message);
                switch (data.type) {
                    case 'auth':
                        console.log("Response auth");
                        var fileUrl = origin + "oodoc/test.bin";

                        if (data.openCmd) {
                            if (data.openCmd.format === "xlsx") {
                                fileUrl = origin + "oocell/test.bin";
                            } else if (data.openCmd.format === "pptx") {
                                fileUrl = origin + "ooslide/test.bin";
                            }
                        }
                        sendData(conn, {"type":"auth","result":1,"sessionId":"08e77705-dc5c-477d-b73a-b1a7cbca1e9b","sessionTimeConnect":1494226099270,"participants":[]});
                        sendData(conn, {"type":"documentOpen","data":{"type":"open","status":"ok","data":{"Editor.bin":fileUrl}}});
                        break;
                    default:
                        break;
                }
            } catch (e) {
                console.error(e);
                //console.log("error receiving response: docId = %s type = %s\r\n%s", docId, (data && data.type) ? data.type : 'null', e.stack);
            }
        });
        conn.on('error', function() {
            console.log("On error");
        });
        conn.on('close', function() {
            console.log("On close");
        });
        console.log("ooserver sending welcome message");
        sendData(conn, {
            type: 'license',
            license: {
                type: 3,
                light: false,
                trial: false,
                rights: 1,
                buildVersion: "4.3.3",
                buildNumber: 4,
                branding: false
            }
        });
    });

    sockjs_echo.installHandlers(server, {prefix: '/common/onlyoffice/doc/[0-9-.a-zA-Z_=]*/c', log: function(severity, message) {
        console.log(message);
    }});

    callbackFunction();
};