/*
  This code is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.
  This code is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  Lesser General Public License for more details.
  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/
#include "GwAppInfo.h"
// #define GW_MESSAGE_DEBUG_ENABLED
//#define FALLBACK_SERIAL
const unsigned long HEAP_REPORT_TIME=2000; //set to 0 to disable heap reporting
#include <Arduino.h>
#include "GwApi.h"
#include "GwHardware.h"

#ifndef N2K_LOAD_LEVEL
#define N2K_LOAD_LEVEL 0
#endif

#ifndef N2K_CERTIFICATION_LEVEL
#define N2K_CERTIFICATION_LEVEL 0xff
#endif

#include <NMEA2000_CAN.h>  // This will automatically choose right CAN library and create suitable NMEA2000 object
#include <ActisenseReader.h>
#include <Seasmart.h>
#include <N2kMessages.h>
#include <WiFi.h>
#include <ESPAsyncWebServer.h>
#include <Preferences.h>
#include <ESPmDNS.h>
#include <map>
#include <vector>
#include "esp_heap_caps.h"
#include <MD5Builder.h>
#include "GwJsonDocument.h"
#include "N2kDataToNMEA0183.h"
#include <esp_image_format.h>


#include "GwLog.h"
#include "GWConfig.h"
#include "GWWifi.h"
#include "GwSocketServer.h"
#include "GwBoatData.h"
#include "GwMessage.h"
#include "GwSerial.h"
#include "GwWebServer.h"
#include "NMEA0183DataToN2K.h"
#include "GwButtons.h"
#include "GwLeds.h"
#include "GwCounter.h"
#include "GwXDRMappings.h"
#include "GwSynchronized.h"
#include "GwUserCode.h"
#include "GwStatistics.h"
#include "GwUpdate.h"
#include "GwTcpClient.h"
#include "GwChannel.h"
#include "GwChannelList.h"



#define MAX_NMEA2000_MESSAGE_SEASMART_SIZE 500
#define MAX_NMEA0183_MESSAGE_SIZE 150 // For AIS
//https://curiouser.cheshireeng.com/2014/08/19/c-compile-time-assert/
#define CASSERT(predicate, text) _impl_CASSERT_LINE(predicate,__LINE__) 
#define _impl_PASTE(a,b) a##b
#define _impl_CASSERT_LINE(predicate, line) typedef char _impl_PASTE(assertion_failed_CASSERT_,line)[(predicate)?1:-1];
//assert length of firmware name and version
CASSERT(strlen(FIRMWARE_TYPE) <= 32, "environment name (FIRMWARE_TYPE) must not exceed 32 chars");
CASSERT(strlen(VERSION) <= 32, "VERSION must not exceed 32 chars");
//https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/system/app_image_format.html
//and removed the bugs in the doc...
__attribute__((section(".rodata_custom_desc"))) esp_app_desc_t custom_app_desc = { 
  ESP_APP_DESC_MAGIC_WORD,
  1,
  {0,0},
  VERSION,
  FIRMWARE_TYPE,
  "00:00:00",
  "2021/12/13",
  "0000",
  {},
  {}
};


String firmwareType(FIRMWARE_TYPE);

typedef std::map<String,String> StringMap;


GwLog logger(LOGLEVEL,NULL);
GwConfigHandler config(&logger);
#ifdef GWBUTTON_PIN
bool fixedApPass=false;
#else
bool fixedApPass=true;
#endif
GwWifi gwWifi(&config,&logger,fixedApPass);
GwChannelList channels(&logger,&config);
GwBoatData boatData(&logger);
GwXDRMappings xdrMappings(&logger,&config);


int NodeAddress;  // To store last Node Address

Preferences preferences;             // Nonvolatile storage on ESP32 - To store LastDeviceAddress
N2kDataToNMEA0183 *nmea0183Converter=NULL;
NMEA0183DataToN2K *toN2KConverter=NULL;
SemaphoreHandle_t mainLock;


GwRequestQueue mainQueue(&logger,20);
GwWebServer webserver(&logger,&mainQueue,80);

GwCounter<unsigned long> countNMEA2KIn("count2Kin");
GwCounter<unsigned long> countNMEA2KOut("count2Kout");

unsigned long saltBase=esp_random();

char hv(uint8_t nibble){
  nibble=nibble&0xf;
  if (nibble < 10) return (char)('0'+nibble);
  return (char)('A'+nibble-10);
}
void toHex(unsigned long v,char *buffer,size_t bsize){
  uint8_t *bp=(uint8_t *)&v;
  size_t i=0;
  for (;i<sizeof(v) && (2*i +1)< bsize;i++){
    buffer[2*i]=hv((*bp) >> 4);
    buffer[2*i+1]=hv(*bp);
    bp++;
  }
  if ((2*i) < bsize) buffer[2*i]=0;
}

bool checkPass(String hash){
  if (! config.getBool(config.useAdminPass)) return true;
  String pass=config.getString(config.adminPassword);
  unsigned long now=millis()/1000UL & ~0x7UL;
  MD5Builder builder;
  char buffer[2*sizeof(now)+1];
  for (int i=0;i< 5 ;i++){
    unsigned long base=saltBase+now;
    toHex(base,buffer,2*sizeof(now)+1);
    builder.begin();
    builder.add(buffer);
    builder.add(pass);
    builder.calculate();
    String md5=builder.toString();
    bool rt=hash == md5;
    logger.logDebug(GwLog::DEBUG,"checking pass %s, base=%ld, hash=%s, res=%d",
      hash.c_str(),base,md5.c_str(),(int)rt);
    if (rt) return true;
    now -= 8;
  }
  return false;
}

GwUpdate updater(&logger,&webserver,&checkPass);
GwConfigInterface *systemName=config.getConfigItem(config.systemName,true);


void handleN2kMessage(const tN2kMsg &n2kMsg,int sourceId, bool isConverted=false)
{
  logger.logDebug(GwLog::DEBUG + 1, "N2K: pgn %d, dir %d", 
    n2kMsg.PGN,sourceId);
  if (sourceId == N2K_CHANNEL_ID){
    countNMEA2KIn.add(n2kMsg.PGN);
  }
  char buf[MAX_NMEA2000_MESSAGE_SEASMART_SIZE];
  bool messageCreated=false;
  channels.allChannels([&](GwChannel *c){
    if (c->sendSeaSmart()){
      if (! messageCreated){
        if (N2kToSeasmart(n2kMsg, millis(), buf, MAX_NMEA2000_MESSAGE_SEASMART_SIZE) != 0) {
          messageCreated=true;
        }
      }
      if (messageCreated){
        c->sendToClients(buf,sourceId);
      }
    }
  });
  
  channels.allChannels([&](GwChannel *c){
    c->sendActisense(n2kMsg,sourceId);
  });
  if (! isConverted){
    nmea0183Converter->HandleMsg(n2kMsg);
  }
  if (sourceId != N2K_CHANNEL_ID){
    countNMEA2KOut.add(n2kMsg.PGN);
    NMEA2000.SendMsg(n2kMsg);
  }
};


//*****************************************************************************
void SendNMEA0183Message(const tNMEA0183Msg &NMEA0183Msg, int sourceId,bool convert=false) {
  logger.logDebug(GwLog::DEBUG+2,"SendNMEA0183(1)");
  char buf[MAX_NMEA0183_MESSAGE_SIZE+3];
  if ( !NMEA0183Msg.GetMessage(buf, MAX_NMEA0183_MESSAGE_SIZE) ) return;
  logger.logDebug(GwLog::DEBUG+2,"SendNMEA0183: %s",buf);
  if (convert){
    toN2KConverter->parseAndSend(buf,sourceId);
  }
  size_t len=strlen(buf);
  buf[len]=0x0d;
  buf[len+1]=0x0a;
  buf[len+2]=0;
  channels.allChannels([&](GwChannel *c){
    c->sendToClients(buf,sourceId);
  });
}

class ApiImpl : public GwApi
{
private:
  int sourceId = -1;

public:
  ApiImpl(int sourceId)
  {
    this->sourceId = sourceId;
  }
  virtual GwRequestQueue *getQueue()
  {
    return &mainQueue;
  }
  virtual void sendN2kMessage(const tN2kMsg &msg,bool convert)
  {
    handleN2kMessage(msg,sourceId,!convert);
    
  }
  virtual void sendNMEA0183Message(const tNMEA0183Msg &msg, int sourceId,bool convert)
  {
      SendNMEA0183Message(msg, sourceId,convert);
  }
  virtual void sendNMEA0183Message(const tNMEA0183Msg &msg, bool convert)
  {
      SendNMEA0183Message(msg, sourceId,convert);
  }
  virtual int getSourceId()
  {
    return sourceId;
  };
  virtual GwConfigHandler *getConfig()
  {
    return &config;
  }
  virtual GwLog* getLogger(){
    return &logger;
  }
  virtual void getBoatDataValues(int numValues,BoatValue **list){
    for (int i=0;i<numValues;i++){
      GwBoatItemBase *item=boatData.getBase(list[i]->getName());
      list[i]->changed=false;
      if (item){
        bool newValid=item->isValid();
        if (newValid != list[i]->valid) list[i]->changed=true;
        list[i]->valid=newValid;
        if (newValid){
          double newValue=item->getDoubleValue();
          if (newValue != list[i]->value) list[i]->changed=true;
          list[i]->value=newValue;
        }
        list[i]->setFormat(item->getFormat());
      }
      else{
        if (list[i]->valid) list[i]->changed=true;
        list[i]->valid=false;
      }
    }
  }
  virtual GwBoatData *getBoatData(){
    return &boatData;
  }
  virtual const char* getTalkerId(){
    return config.getString(config.talkerId,String("GP")).c_str();
  }
  virtual ~ApiImpl(){}
};

bool delayedRestart(){
  return xTaskCreate([](void *p){
    GwLog *logRef=(GwLog *)p;
    logRef->logDebug(GwLog::LOG,"delayed reset started");
    delay(800);
    ESP.restart();
    vTaskDelete(NULL);
  },"reset",2000,&logger,0,NULL) == pdPASS;
}
ApiImpl *apiImpl=new ApiImpl(MIN_USER_TASK);
GwUserCode userCodeHandler(apiImpl,&mainLock);

#define JSON_OK "{\"status\":\"OK\"}"
#define JSON_INVALID_PASS F("{\"status\":\"invalid password\"}")

//WebServer requests that should
//be processed inside the main loop
//this prevents us from the need to sync all the accesses
class ResetRequest : public GwRequestMessage
{
  String hash;
public:
  ResetRequest(String hash) : GwRequestMessage(F("application/json"),F("reset")){
    this->hash=hash;
  };

protected:
  virtual void processRequest()
  {
    logger.logDebug(GwLog::LOG, "Reset Button");
    if (! checkPass(hash)){
      result=JSON_INVALID_PASS;
      return;
    }
    result = JSON_OK;
    if (!delayedRestart()){
      logger.logDebug(GwLog::ERROR,"cannot initiate restart");
    }
  }
};

class StatusRequest : public GwRequestMessage
{
public:
  StatusRequest() : GwRequestMessage(F("application/json"),F("status")){};

protected:
  virtual void processRequest()
  {
    GwJsonDocument status(256 + 
      countNMEA2KIn.getJsonSize()+
      countNMEA2KOut.getJsonSize() +
      channels.getJsonSize()
      );
    status["version"] = VERSION;
    status["wifiConnected"] = gwWifi.clientConnected();
    status["clientIP"] = WiFi.localIP().toString();
    status["apIp"] = gwWifi.apIP();
    size_t bsize=2*sizeof(unsigned long)+1;
    unsigned long base=saltBase + ( millis()/1000UL & ~0x7UL);
    char buffer[bsize];
    toHex(base,buffer,bsize);
    status["salt"] = buffer;
    status["fwtype"]= firmwareType;
    //nmea0183Converter->toJson(status);
    countNMEA2KIn.toJson(status);
    countNMEA2KOut.toJson(status);
    channels.toJson(status);
    serializeJson(status, result);
  }
};

class CheckPassRequest : public GwRequestMessage{
  String hash;
  public:
    CheckPassRequest(String h): GwRequestMessage(F("application/json"),F("checkPass")){
      this->hash=h;
    };
  protected:
    virtual void processRequest(){
      bool res=checkPass(hash);
      if (res) result=JSON_OK;
      else result=F("{\"status\":\"ERROR\"}");
    }

};
class CapabilitiesRequest : public GwRequestMessage{
  public:
    CapabilitiesRequest() : GwRequestMessage(F("application/json"),F("capabilities")){};
  protected:
    virtual void processRequest(){
      int numCapabilities=userCodeHandler.getCapabilities()->size();
      GwJsonDocument json(JSON_OBJECT_SIZE(numCapabilities*3+6));
      for (auto it=userCodeHandler.getCapabilities()->begin();
        it != userCodeHandler.getCapabilities()->end();it++){
          json[it->first]=it->second;
        }
      #ifdef GWSERIAL_MODE
      String serial(F(GWSERIAL_MODE));
      #else
      String serial(F("NONE"));
      #endif
      json["serialmode"]=serial;
      #ifdef GWBUTTON_PIN
      json["hardwareReset"]="true";
      #endif
      serializeJson(json,result);
    }  
};
class ConverterInfoRequest : public GwRequestMessage{
  public:
    ConverterInfoRequest() : GwRequestMessage(F("application/json"),F("converterInfo")){};
  protected:
    virtual void processRequest(){
      GwJsonDocument json(512);
      String keys=toN2KConverter->handledKeys();
      logger.logDebug(GwLog::DEBUG,"handled nmea0183: %s",keys.c_str());
      json["nmea0183"]=keys;
      keys=nmea0183Converter->handledKeys();
      logger.logDebug(GwLog::DEBUG,"handled nmea2000: %s",keys.c_str());
      json["nmea2000"]=keys;
      serializeJson(json,result);
    }  
};
class ConfigRequest : public GwRequestMessage
{
public:
  ConfigRequest() : GwRequestMessage(F("application/json"),F("config")){};

protected:
  virtual void processRequest()
  {
    result = config.toJson();
  }
};

class SetConfigRequest : public GwRequestMessage
{
public:
  SetConfigRequest() : GwRequestMessage(F("application/json"),F("setConfig")){};
  StringMap args;

protected:
  virtual void processRequest()
  {
    bool ok = true;
    String error;
    String hash;
    auto it=args.find("_hash");
    if (it != args.end()){
      hash=it->second;
    }
    if (! checkPass(hash)){
      result=JSON_INVALID_PASS;
      return;
    }
    for (StringMap::iterator it = args.begin(); it != args.end(); it++)
    {
      if (it->first.indexOf("_")>= 0) continue;
      bool rt = config.updateValue(it->first, it->second);
      if (!rt)
      {
        logger.logDebug(GwLog::ERROR,"ERR: unable to update %s to %s", it->first.c_str(), it->second.c_str());
        ok = false;
        error += it->first;
        error += "=";
        error += it->second;
        error += ",";
      }
    }
    if (ok)
    {
      result = JSON_OK;
      logger.logDebug(GwLog::ERROR,"update config and restart");
      config.saveConfig();
      delayedRestart();
    }
    else
    {
      GwJsonDocument rt(100);
      rt["status"] = error;
      serializeJson(rt, result);
    }
  }
};
class ResetConfigRequest : public GwRequestMessage
{
  String hash;
public:
  ResetConfigRequest(String hash) : GwRequestMessage(F("application/json"),F("resetConfig")){
    this->hash=hash;
  };

protected:
  virtual void processRequest()
  {
    if (! checkPass(hash)){
      result=JSON_INVALID_PASS;
      return;
    }
    config.reset(true);
    logger.logDebug(GwLog::ERROR,"reset config, restart");
    result = JSON_OK;
    delayedRestart();
  }
};
class BoatDataRequest : public GwRequestMessage
{
public:
  BoatDataRequest() : GwRequestMessage(F("application/json"),F("boatData")){};

protected:
  virtual void processRequest()
  {
    result = boatData.toJson();
  }
};
class BoatDataStringRequest : public GwRequestMessage
{
public:
  BoatDataStringRequest() : GwRequestMessage(F("text/plain"),F("boatDataString")){};

protected:
  virtual void processRequest()
  {
    result = boatData.toString();
  }
};

class XdrExampleRequest : public GwRequestMessage
{
public:
  String mapping;
  double value;
  XdrExampleRequest(String mapping, double value) : GwRequestMessage(F("text/plain"),F("xdrExample")){
    this->mapping=mapping;
    this->value=value;
  };

protected:
  virtual void processRequest()
  {
    String val=xdrMappings.getXdrEntry(mapping,value);
    if (val == "") {
      result=val;
      return;
    }
    tNMEA0183Msg msg;
    msg.Init("XDR",config.getString(config.talkerId,String("GP")).c_str());
    msg.AddStrField(val.c_str());
    char buf[MAX_NMEA0183_MSG_BUF_LEN];
    msg.GetMessage(buf,MAX_NMEA0183_MSG_BUF_LEN);
    result=buf;
  }
};
class XdrUnMappedRequest : public GwRequestMessage
{
public:
  XdrUnMappedRequest() : GwRequestMessage(F("text/plain"),F("boatData")){};

protected:
  virtual void processRequest()
  {
    result = xdrMappings.getUnMapped();
  }
};



void setup() {
  mainLock=xSemaphoreCreateMutex();
  uint8_t chipid[6];
  uint32_t id = 0;
  config.loadConfig();
  bool fallbackSerial=false;
#ifdef FALLBACK_SERIAL
  fallbackSerial=true;
    //falling back to old style serial for logging
    Serial.begin(baud);
    Serial.printf("fallback serial enabled, error was %d\n",st);
    logger.prefix="FALLBACK:";
#endif
  userCodeHandler.startInitTasks(MIN_USER_TASK);
  gwWifi.setup();
  MDNS.begin(config.getConfigItem(config.systemName)->asCString());
  channels.begin(fallbackSerial);
  logger.flush();
  webserver.registerMainHandler("/api/reset", [](AsyncWebServerRequest *request)->GwRequestMessage *{
    return new ResetRequest(request->arg("_hash"));
  });
  webserver.registerMainHandler("/api/capabilities", [](AsyncWebServerRequest *request)->GwRequestMessage *{
    return new CapabilitiesRequest();
  });
  webserver.registerMainHandler("/api/converterInfo", [](AsyncWebServerRequest *request)->GwRequestMessage *{
    return new ConverterInfoRequest();
  });
  webserver.registerMainHandler("/api/status", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { return new StatusRequest(); });
  webserver.registerMainHandler("/api/config", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { return new ConfigRequest(); });
  webserver.registerMainHandler("/api/setConfig",
                              [](AsyncWebServerRequest *request)->GwRequestMessage *
                              {
                                StringMap args;
                                for (int i = 0; i < request->args(); i++)
                                {
                                  args[request->argName(i)] = request->arg(i);
                                }
                                SetConfigRequest *msg = new SetConfigRequest();
                                msg->args = args;
                                return msg;
                              });
  webserver.registerMainHandler("/api/resetConfig", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { return new ResetConfigRequest(request->arg("_hash")); });
  webserver.registerMainHandler("/api/boatData", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { return new BoatDataRequest(); });
  webserver.registerMainHandler("/api/boatDataString", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { return new BoatDataStringRequest(); });                              
  webserver.registerMainHandler("/api/xdrExample", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { 
                                String mapping=request->arg("mapping");
                                double value=atof(request->arg("value").c_str());
                                return new XdrExampleRequest(mapping,value); 
                              });
  webserver.registerMainHandler("/api/xdrUnmapped", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { return new XdrUnMappedRequest(); });                              
  webserver.registerMainHandler("/api/checkPass", [](AsyncWebServerRequest *request)->GwRequestMessage *
                              { 
                                String hash=request->arg("hash");
                                return new CheckPassRequest(hash); 
                              });                            

  webserver.begin();
  xdrMappings.begin();
  logger.flush();
  
  nmea0183Converter= N2kDataToNMEA0183::create(&logger, &boatData, 
    [](const tNMEA0183Msg &msg, int sourceId){
      SendNMEA0183Message(msg,sourceId,false);
    }
    , N2K_CHANNEL_ID,
    config.getString(config.talkerId,String("GP")),
    &xdrMappings,
    config.getInt(config.minXdrInterval,100)
    );

  toN2KConverter= NMEA0183DataToN2K::create(&logger,&boatData,[](const tN2kMsg &msg, int sourceId)->bool{
    logger.logDebug(GwLog::DEBUG+2,"send N2K %ld",msg.PGN);
    handleN2kMessage(msg,sourceId,true);
    return true;
  },
  &xdrMappings,
  config.getInt(config.min2KInterval,50)
  );  
  
  NMEA2000.SetN2kCANMsgBufSize(8);
  NMEA2000.SetN2kCANReceiveFrameBufSize(250);
  NMEA2000.SetN2kCANSendFrameBufSize(250);

  esp_efuse_mac_get_default(chipid);
  for (int i = 0; i < 6; i++) id += (chipid[i] << (7 * i));

  // Set product information
  NMEA2000.SetProductInformation("1", // Manufacturer's Model serial code
                                 100, // Manufacturer's product code
                                 systemName->asCString(),  // Manufacturer's Model ID
                                 VERSION,  // Manufacturer's Software version code
                                 VERSION, // Manufacturer's Model version,
                                 N2K_LOAD_LEVEL,
                                 0xffff, //Version
                                 N2K_CERTIFICATION_LEVEL
                                );
  // Set device information
  NMEA2000.SetDeviceInformation(id, // Unique number. Use e.g. Serial number. Id is generated from MAC-Address
                                130, // Device function=Analog to NMEA 2000 Gateway. See codes on http://www.nmea.org/Assets/20120726%20nmea%202000%20class%20&%20function%20codes%20v%202.00.pdf
                                25, // Device class=Inter/Intranetwork Device. See codes on  http://www.nmea.org/Assets/20120726%20nmea%202000%20class%20&%20function%20codes%20v%202.00.pdf
                                2046 // Just choosen free from code list on http://www.nmea.org/Assets/20121020%20nmea%202000%20registration%20list.pdf
                               );

  // If you also want to see all traffic on the bus use N2km_ListenAndNode instead of N2km_NodeOnly below

  NMEA2000.SetForwardType(tNMEA2000::fwdt_Text); // Show in clear text. Leave uncommented for default Actisense format.

  preferences.begin("nvs", false);                          // Open nonvolatile storage (nvs)
  NodeAddress = preferences.getInt("LastNodeAddress", 32);  // Read stored last NodeAddress, default 32
  preferences.end();

  logger.logDebug(GwLog::LOG,"NodeAddress=%d", NodeAddress);
  logger.flush();
  NMEA2000.SetMode(tNMEA2000::N2km_ListenAndNode, NodeAddress);
  NMEA2000.SetForwardOwnMessages(false);
  // Set the information for other bus devices, which messages we support
  unsigned long *pgns=toN2KConverter->handledPgns();
  if (logger.isActive(GwLog::DEBUG)){
    unsigned long *op=pgns;
    while (*op != 0){
      logger.logDebug(GwLog::DEBUG,"add transmit pgn %ld",(long)(*op));
      logger.flush();
      op++;
    }
  }
  NMEA2000.ExtendTransmitMessages(pgns);
  NMEA2000.ExtendReceiveMessages(nmea0183Converter->handledPgns());
  NMEA2000.SetMsgHandler([](const tN2kMsg &n2kMsg){
    handleN2kMessage(n2kMsg,N2K_CHANNEL_ID);
  });
  NMEA2000.Open();
  logger.logDebug(GwLog::LOG,"starting addon tasks");
  logger.flush();
  userCodeHandler.startAddonTask(F("handleButtons"),handleButtons,100);
  setLedMode(LED_GREEN);
  userCodeHandler.startAddonTask(F("handleLeds"),handleLeds,101);
  {
    GWSYNCHRONIZED(&mainLock);
    userCodeHandler.startUserTasks(MIN_USER_TASK);
  }
  logger.logDebug(GwLog::ERROR,"wifi AP pass: %s",config.getString(config.apPassword).c_str());
  logger.logDebug(GwLog::ERROR,"admin pass: %s",config.getString(config.adminPassword).c_str());
  logger.logDebug(GwLog::LOG,"setup done");
}  
//*****************************************************************************
void handleSendAndRead(bool handleRead){
  channels.allChannels([&](GwChannel *c){
    c->loop(handleRead,true);
  });
}

TimeMonitor monitor(20,0.2);
unsigned long lastHeapReport=0;
void loop() {
  monitor.reset();
  GWSYNCHRONIZED(&mainLock);
  logger.flush();
  monitor.setTime(1);
  gwWifi.loop();
  unsigned long now=millis();
  monitor.setTime(2);
  if (HEAP_REPORT_TIME > 0 && now > (lastHeapReport+HEAP_REPORT_TIME)){
    lastHeapReport=now;
    if (logger.isActive(GwLog::DEBUG)){
      logger.logDebug(GwLog::DEBUG,"Heap free=%ld, minFree=%ld",
          (long)xPortGetFreeHeapSize(),
          (long)xPortGetMinimumEverFreeHeapSize()
      );
      logger.logDebug(GwLog::DEBUG,"Main loop %s",monitor.getLog().c_str());
    }
  }
  monitor.setTime(3);
  channels.allChannels([](GwChannel *c){
    c->loop(true,false);
  });
  //reads
  monitor.setTime(4);
  channels.allChannels([](GwChannel *c){
    c->loop(false,true);
  });
  //writes
  monitor.setTime(5);  
  NMEA2000.ParseMessages();
  monitor.setTime(6);

  int SourceAddress = NMEA2000.GetN2kSource();
  if (SourceAddress != NodeAddress) { // Save potentially changed Source Address to NVS memory
    NodeAddress = SourceAddress;      // Set new Node Address (to save only once)
    preferences.begin("nvs", false);
    preferences.putInt("LastNodeAddress", SourceAddress);
    preferences.end();
    logger.logDebug(GwLog::LOG,"Address Change: New Address=%d\n", SourceAddress);
  }
  nmea0183Converter->loop();
  monitor.setTime(7);

  //read channels
  channels.allChannels([](GwChannel *c){
    c->readMessages([&](const char * buffer, int sourceId){
      channels.allChannels([&](GwChannel *oc){
        oc->sendToClients(buffer,sourceId);
        oc->loop(false,true);
      });
      if (c->sendToN2K()){
        toN2KConverter->parseAndSend(buffer, sourceId);
      }
    });
  });
  monitor.setTime(8);
  channels.allChannels([](GwChannel *c){
    c->parseActisense([](const tN2kMsg &msg,int source){
      handleN2kMessage(msg,source);
    });
  });
  monitor.setTime(9);

  //handle message requests
  GwMessage *msg=mainQueue.fetchMessage(0);
  if (msg){
    msg->process();
    msg->unref();
  }
  monitor.setTime(10);
}