//
//
// mit jedem Paket eine eindeutige ID generieren. 
// (ein Teil generiert der Server ein anderer die Anwendung)
//


var sessionID = "";
var randomID = "";
var request_running = 0;

function serverinout_getRand(min, max) {
	return Math.floor(Math.random() * (max - min) + min);
};

function serverinout(request, callback) {

	//
	// generate random ID
	if (randomID == "") {
		randomID = serverinout_getRand(10000000, 99999999);
	}
	
	request.sid = sessionID;
	request.rid = randomID;
 	
//    e.preventDefault();
	senddata = JSON.stringify(request);
//    debug('serverinout: send request:' + senddata);
    $.ajax({
        type: "POST",
//        url: '/modelbahn/serverinout.php',
        url: '/cgi-bin/modelbahn-cgi',
        data: senddata,
        success: function(response)
        {
            var jsonData = {};
// ENABLE LATER           try {
            	jsonData = JSON.parse(response);
		        if (jsonData.success == "1")
		        {
		            var serverstatus = document.getElementById("infoserverstatus");
		            serverstatus.innerHTML = "connected";
		            callback(jsonData);
		        }
		        else
		        {
		            var serverstatus = document.getElementById("infoserverstatus");
		            serverstatus.innerHTML = "-trying-";
		        }
// ENABLE LATER      } catch(err) {
// ENABLE LATER      var serverstatus = document.getElementById("infoserverstatus");
// ENABLE LATER      serverstatus.innerHTML = "-error-";
// ENABLE LATER      }
       },
       error: function(error) {
           var serverstatus = document.getElementById("infoserverstatus");
           serverstatus.innerHTML = "ajax error";
       }
   });
};


function serverinout_Power(onoff) {
	var request = {};
	
	if (onoff) 	request = {command: "poweron"};
	else 		request = {command: "poweroff"};
	serverinout (request, serverinout_defaultCallback);
}


function serverinout_addTrack(tracks) {
	var request = { command: "addrailway", rail: tracks };
	
	serverinout (request, serverinout_defaultCallback);
};


function serverinout_delTrack(tracks) {
	var request = { command: "delrailway", rail: tracks };
	
	serverinout (request, serverinout_defaultCallback);
};


function serverinout_Save(data) {
	var request = { command: "save" };
	
	serverinout (request, serverinout_defaultCallback);
};


function serverinout_defaultCallback(data) {
//	if (data.changes) if (data.changes.length > 0) debug ("From Server :" + JSON.stringify(data));
	if (data.info) {
	}
	if (data.sid && data.rid) {
		//
		// valid data from server
		if (data.rid == randomID && data.sid == sessionID) {
			//
			// loop through all the changes
			if (data.changes) {
				for (var i = 0; i < data.changes.length; i++) {
					//
					// infoline
					if (data.changes[i].infoline) {
						var text = document.getElementById("infoline");
						text.innerHTML = data.changes[i].infoline;
					}

					//
					// railway changes
					if (data.changes[i].track) {
						trackSetup(data.changes[i].track);
					}
					if (data.changes[i].railway) {
						trackAddElement(data.changes[i].railway);
					}
					
					//
					// Interface changes
					if (data.changes[i].interfaces) {
						for (var j = 0; j < data.changes[i].interfaces.length; j++) {
							interface_Update(data.changes[i].interfaces[j]);
						}
					}
					if (data.changes[i].interface) {
						interface_Update(data.changes[i].interface);
					}
					if (data.changes[i].interfacedelete) {
						interface_Delete(data.changes[i].interfacedelete);
					}
					
					//
					// Locomotives changes
					if (data.changes[i].locomotives) {
						for (var j = 0; j < data.changes[i].locomotives.length; j++) {
							locomotive_Update(data.changes[i].locomotives[j]);
						}
					}
					if (data.changes[i].locomotive) {
						locomotive_Update(data.changes[i].locomotive);
					}
					if (data.changes[i].locomotivedelete) {
						locomotive_Delete(data.changes[i].locomotivedelete);
					}
					
					//
					// Turnout changes
					if (data.changes[i].turnouts) {
						for (var j = 0; j < data.changes[i].turnouts.length; j++) {
							turnout_Update(data.changes[i].turnouts[j]);
						}
					}
					if (data.changes[i].turnout) {
						turnout_Update(data.changes[i].turnout);
					}
					if (data.changes[i].turnoutdelete) {
						turnout_Delete(data.changes[i].turnoutdelete);
					}

					//
					// Sensor changes
					if (data.changes[i].sensors) {
						for (var j = 0; j < data.changes[i].sensors.length; j++) {
							sensor_Update(data.changes[i].sensors[j]);
						}
					}
					if (data.changes[i].sensor) {
						sensor_Update(data.changes[i].sensor);
					}
					if (data.changes[i].sensordelete) {
						sensor_Delete(data.changes[i].sensordelete);
					}
				}
				trackDraw();
			}
		}
		//
		// new session?
		else if (data.rid == randomID && data.sid > 0) {
			// we got a new sessionID --> request track data
			if (sessionID == 0) {
				debug ("setup session ID");
				sessionID = data.sid;
				serverinout( {command: "getall" }, serverinout_defaultCallback);
			}
		}
		else {
			debug ("ERROR: serverinout_defaultCallback");
		}
	}
	else {
		debug ("ERROR: serverinout_defaultCallback no data.sid && data.rid");
	}
};


//
// starte timeout timer fuer Updates on 1/sec
function serverinout_AutoUpdateCallback(data) {
	serverinout_defaultCallback(data);
	request_running = 0;
};


function serverinout_AutoUpdate() {
//	debug ("serverinout_AutoUpdate");
	if (request_running == 0) {
		request_running = 0;
		serverinout({}, serverinout_defaultCallback);
	}
    setTimeout(function() { serverinout_AutoUpdate() },1000);
}