var _ws;
var adr;
var clog = {};
var pingerid;
var ios = false;

if (typeof clog_debug == 'undefined') {
    clog_debug = false;
}

const ws = {
    // replace 'ws.send()'
    send: function(message) {
        if (ios) {
            _ws.send(message);
        } else {
            // hack, see QML 'onTitleChanged()'
            document.title = message;
            document.title = "-"; // non empty
        }
    }
};

function Ping_ws() {
    if (_ws.readyState == 1) {
        _ws.send ('0');
    }
}

function Shutdown_ws(event) {
    if (_ws != null) {
	_ws.onerror = null;
	_ws.onclose = null;
	_ws.close ();
	_ws = null;
    }
    clearInterval (pingerid);
    if (clog['html_on_close'] != '') {
        $(document.body).html(clog['html_on_close']);
    }
}

function Setup_ws() {
    _ws.onmessage = function (event) {
        try {
            if (clog_debug == true) {
		console.log ('eval data = ' + event.data);
            }
            eval (event.data);
        } catch (e) {
            console.error (e.message);
        }
    }

    _ws.onerror = function (event) {
        console.log ('onerror: reconnect');
        _ws = null;
        _ws = new WebSocket (adr  + '?r=' + clog['connection_id']);
        _ws.onopen = function (event) {
            console.log ('onerror: reconnect successful');
            Setup_ws();
        }
        _ws.onclose = function (event) {
            console.log ('onerror: reconnect failure');
            Shutdown_ws(event);
        }
    }

    _ws.onclose = function (event) {
        console.log ('onclose: reconnect');
        _ws = null;
        _ws = new WebSocket (adr  + '?r=' + clog['connection_id']);
        _ws.onopen = function (event) {
            console.log ('onclose: reconnect successful');
            Setup_ws();
        }
        _ws.onclose = function (event) {
            console.log ('onclose: reconnect failure');
            Shutdown_ws(event);
        }
    }
}

$( document ).ready(function() {
    var s = document.location.search;
    var tokens;
    var r = /[?&]?([^=]+)=([^&]*)/g;

    clog['body']=document.body;
    clog['head']=document.head;
    clog['documentElement']=document.documentElement;
    clog['window']=window;
    clog['navigator']=navigator;
    clog['document']=window.document;
    clog['location']=window.location;

    /*
    if (location.protocol == 'https:') {
        adr = 'wss://' + location.hostname;
    } else {
        adr = 'ws://' + location.hostname;
    }

    if (location.port != '') { adr = adr + ':' + location.port; }
    adr = adr + '/clog';
    */

    if (ios) {
        adr = 'ws://127.0.0.1:8080';

        try {
            console.log ('connecting to ' + adr);
            _ws = new WebSocket (adr);
        } catch (e) {
            console.log ('trying again, connecting to ' + adr);
            _ws = new WebSocket (adr);
        }

        if (_ws != null) {
            _ws.onopen = function (event) {
                console.log ('connection successful');
                Setup_ws();
            }
            pingerid = setInterval (function () {Ping_ws ();}, 10000);
        } else {
            document.writeln ('If you are seeing this your browser or your connection to the internet is blocking web_wss.');
        }
    }
});