/****************************************************************************
 * This file is part of the project AqHome.
 * AqHome (c) by 2024 Martin Preuss, all rights reserved.
 *
 * The license for this file can be found in the file COPYING which you
 * should have received along with this file.
 ****************************************************************************/

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include "./init.h"
#include "./fini.h"
#include "./loop.h"
#include "./net_read.h"
#include "aqhome-react/units/u_timer.h"

#include "aqhome/aqhome.h"

#include <gwenhywfar/gwenhywfar.h>
#include <gwenhywfar/args.h>
#include <gwenhywfar/logger.h>
#include <gwenhywfar/db.h>
#include <gwenhywfar/debug.h>
#include <gwenhywfar/cgui.h>
#include <gwenhywfar/text.h>

#ifdef HAVE_SIGNAL_H
# include <signal.h>
#endif

#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <time.h>



/* ------------------------------------------------------------------------------------------------
 * defines
 * ------------------------------------------------------------------------------------------------
 */

#define I18N(msg) msg
#define I18S(msg) msg


#define FULL_DEBUG

#define AQHOME_REACT_READNET_INTERVAL 60



/* ------------------------------------------------------------------------------------------------
 * forward declarations
 * ------------------------------------------------------------------------------------------------
 */

static void _serve(AQHOME_REACT *aqh);

#ifdef HAVE_SIGNAL_H
static int _setSignalHandlers(void);
static int _setupSigAction(struct sigaction *sa, int sig);
static void _signalHandler(int s);
static struct sigaction saINT,saTERM, saHUP, saTSTP, saCONT;
#endif



/* ------------------------------------------------------------------------------------------------
 * static vars
 * ------------------------------------------------------------------------------------------------
 */

static int stopService=0;



/* ------------------------------------------------------------------------------------------------
 * implementations
 * ------------------------------------------------------------------------------------------------
 */

int main(int argc, char **argv)
{
  AQHOME_REACT *aqh;
  GWEN_DB_NODE *dbArgs;
  int rv;
  GWEN_GUI *gui;
  const char *s;

  rv=GWEN_Init();
  if (rv) {
    fprintf(stderr, "ERROR: Unable to init Gwen.\n");
    return 2;
  }

  GWEN_Logger_Open(0, "aqhome-react", 0, GWEN_LoggerType_Console, GWEN_LoggerFacility_User);
  GWEN_Logger_SetLevel(0, GWEN_LoggerLevel_Warning);

  rv=AQH_Init();
  if (rv<0) {
    DBG_INFO(NULL, "here (%d)", rv);
    return 2;
  }

  aqh=AqHomeReact_new();
  rv=AqHomeReact_Init(aqh, argc, argv);
  if (rv<0) {
    if (rv==GWEN_ERROR_CLOSE)
      return 1;
    DBG_INFO(NULL, "here (%d)", rv);
    return 2;
  }

  dbArgs=AqHomeReact_GetDbArgs(aqh);

  gui=GWEN_Gui_CGui_new();
  s=GWEN_DB_GetCharValue(dbArgs, "charset", 0, NULL);
  if (s && *s)
    GWEN_Gui_SetCharSet(gui, s);
  GWEN_Gui_SetGui(gui);

  _serve(aqh);

  AqHomeReact_Fini(aqh);
  AqHomeReact_free(aqh);

  GWEN_Gui_SetGui(NULL);
  GWEN_Gui_free(gui);

  return 0;
}



void _serve(AQHOME_REACT *aqh)
{
  int rv;
  int timeout;
  time_t startTime;
  time_t lastTimerTime;
  time_t lastFileScanTime;
  GWEN_DB_NODE *dbArgs;
  AQHREACT_UNIT *timerUnit;

  startTime=time(NULL);
  lastTimerTime=startTime;
  lastFileScanTime=startTime;

  AqHomeReact_SetLatestNetworkFileTime(aqh, AQHomeReact_GetNewestUnitNetFiletime());

  dbArgs=AqHomeReact_GetDbArgs(aqh);
  timerUnit=AqHomeReact_GetTimerUnit(aqh);

  rv=_setSignalHandlers();
  if (rv<0) {
    DBG_ERROR(NULL, "Error setting signal handlers (%d)", rv);
    return;
  }

  timeout=GWEN_DB_GetIntValue(dbArgs, "timeout", 0, 0);

  while(!stopService) {
    time_t now;

    DBG_DEBUG(NULL, "Next loop");

    AqHomeReact_IoLoop(aqh, 500);

    now=time(NULL);
    if (now!=lastTimerTime) {
      lastTimerTime=now;
      AqHomeReact_UnitTimer_GenerateTick(timerUnit);
    }

    AqHomeReact_ProcessAllUnits(aqh);

    if ((now-lastFileScanTime)>AQHOME_REACT_READNET_INTERVAL) {
      time_t tNew;
      time_t t;

      DBG_INFO(NULL, "Checking network files");
      tNew=AQHomeReact_GetNewestUnitNetFiletime();
      t=AqHomeReact_GetLatestNetworkFileTime(aqh);
      if (tNew && tNew>t) {
        DBG_INFO(NULL, "Reloading network files");
        AqHomeReact_ReloadUnitNets(aqh);
        AqHomeReact_SetLatestNetworkFileTime(aqh, tNew);
      }
      lastFileScanTime=now;
    }

    if (timeout) {
      if ((now-startTime)>timeout) {
        DBG_ERROR(NULL, "Timeout, stopping service");
        break;
      }
    }

  } /* while */

}



int _setSignalHandlers(void)
{
#ifdef HAVE_SIGNAL_H
  int rv;

  rv=_setupSigAction(&saINT, SIGINT);
  if (rv)
    return rv;

  rv=_setupSigAction(&saTERM, SIGTERM);
  if (rv)
    return rv;

  rv=_setupSigAction(&saHUP, SIGHUP);
  if (rv)
    return rv;

#  ifdef SIGTSTP
  rv=_setupSigAction(&saTSTP, SIGTSTP);
  if (rv)
    return rv;
#  endif

#  ifdef SIGCONT
  rv=_setupSigAction(&saCONT, SIGCONT);
  if (rv)
    return rv;
#  endif
#endif
  return 0;
}



int _setupSigAction(struct sigaction *sa, int sig)
{
  sa->sa_handler=_signalHandler;
  sigemptyset(&sa->sa_mask);
  sa->sa_flags=0;
  if (sigaction(sig, sa, 0)) {
    DBG_ERROR(NULL, "Could not setup signal handler for signal %d", sig);
    return GWEN_ERROR_IO;
  }

  return 0;
}



void _signalHandler(int s)
{
  switch(s) {
  case SIGINT:
  case SIGTERM:
  case SIGHUP:
    DBG_WARN(0, "Received signal %d, stopping service in next loop.",s);
    stopService=1;
    break;
  default:
    DBG_WARN(0, "Unknown signal %d",s);
    break;
  }
}