/*
  xdrv_09_timers.ino - timer support for Tasmota

  Copyright (C) 2020  Theo Arends

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program 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 General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifdef USE_TIMERS
/*********************************************************************************************\
 * Timers
 *
 * Arm a timer using one or all of the following JSON values:
 * {"Arm":1,"Mode":0,"Time":"09:23","Window":0,"Days":"--TW--S","Repeat":1,"Output":1,"Action":1}
 *
 * Arm     0 = Off, 1 = On
 * Mode    0 = Schedule, 1 = Sunrise, 2 = Sunset
 * Time    hours:minutes
 * Window  minutes (0..15)
 * Days    7 day character mask starting with Sunday (SMTWTFS). 0 or - = Off, any other value = On
 * Repeat  0 = Execute once, 1 = Execute again
 * Output  1..16
 * Action  0 = Off, 1 = On, 2 = Toggle, 3 = Blink or Rule if USE_RULES enabled
 *
 * Window allows Time offset for +/- 15 minutes max as long as Time is not within Window from 00:00
\*********************************************************************************************/

#define XDRV_09             9

const char kTimerCommands[] PROGMEM = "|"  // No prefix
  D_CMND_TIMER "|" D_CMND_TIMERS
#ifdef USE_SUNRISE
  "|" D_CMND_LATITUDE "|" D_CMND_LONGITUDE
#endif
  ;

void (* const TimerCommand[])(void) PROGMEM = {
  &CmndTimer, &CmndTimers
#ifdef USE_SUNRISE
  , &CmndLatitude, &CmndLongitude
#endif
  };

uint16_t timer_last_minute = 60;
int8_t timer_window[MAX_TIMERS] = { 0 };

#ifdef USE_SUNRISE
/*********************************************************************************************\
 * Sunrise and sunset (+13k code)
 *
 * https://forum.arduino.cc/index.php?topic=218280.0
 * Source: C-Programm von http://lexikon.astronomie.info/zeitgleichung/neu.html
 *         Rewrite for Arduino by 'jurs' for German Arduino forum
\*********************************************************************************************/

const float pi2 = TWO_PI;
const float pi = PI;
const float RAD = DEG_TO_RAD;

float JulianischesDatum(void)
{
  // Gregorianischer Kalender
  int Gregor;
  int Jahr = RtcTime.year;
  int Monat = RtcTime.month;
  int Tag = RtcTime.day_of_month;

  if (Monat <= 2) {
    Monat += 12;
    Jahr -= 1;
  }
  Gregor = (Jahr / 400) - (Jahr / 100) + (Jahr / 4);  // Gregorianischer Kalender
  return 2400000.5f + 365.0f*Jahr - 679004.0f + Gregor + (int)(30.6001f * (Monat +1)) + Tag + 0.5f;
}

float InPi(float x)
{
  int n = (int)(x / pi2);
  x = x - n*pi2;
  if (x < 0) x += pi2;
  return x;
}

float eps(float T)
{
  // Neigung der Erdachse
  return RAD * (23.43929111f + (-46.8150f*T - 0.00059f*T*T + 0.001813f*T*T*T)/3600.0f);
}

float BerechneZeitgleichung(float *DK,float T)
{
  float RA_Mittel = 18.71506921f + 2400.0513369f*T +(2.5862e-5f - 1.72e-9f*T)*T*T;
  float M = InPi(pi2 * (0.993133f + 99.997361f*T));
  float L = InPi(pi2 * (0.7859453f + M/pi2 + (6893.0f*sinf(M)+72.0f*sinf(2.0f*M)+6191.2f*T) / 1296.0e3f));
  float e = eps(T);
  float RA = atanf(tanf(L)*cosf(e));
  if (RA < 0.0) RA += pi;
  if (L > pi) RA += pi;
  RA = 24.0*RA/pi2;
  *DK = asinf(sinf(e)*sinf(L));
  // Damit 0<=RA_Mittel<24
  RA_Mittel = 24.0f * InPi(pi2*RA_Mittel/24.0f)/pi2;
  float dRA = RA_Mittel - RA;
  if (dRA < -12.0f) dRA += 24.0f;
  if (dRA > 12.0f) dRA -= 24.0f;
  dRA = dRA * 1.0027379f;
  return dRA;
}

void DuskTillDawn(uint8_t *hour_up,uint8_t *minute_up, uint8_t *hour_down, uint8_t *minute_down)
{
  float JD2000 = 2451545.0f;
  float JD = JulianischesDatum();
  float T = (JD - JD2000) / 36525.0f;
  float DK;
  /*
  h (D) = -0.8333 normaler SA & SU-Gang
  h (D) = -6.0 civile Dämmerung
  h (D) = -12.0 nautische Dämmerung
  h (D) = -18.0 astronomische Dämmerung
  */
//  double h = -50/60.0*RAD;
  float h = SUNRISE_DAWN_ANGLE *RAD;
  float B = (((float)Settings.latitude)/1000000) * RAD; // geographische Breite
  float GeographischeLaenge = ((float)Settings.longitude)/1000000;
//  double Zeitzone = 0; //Weltzeit
//  double Zeitzone = 1; //Winterzeit
//  double Zeitzone = 2.0;   //Sommerzeit
  float Zeitzone = ((float)Rtc.time_timezone) / 60;
  float Zeitgleichung = BerechneZeitgleichung(&DK, T);
  float Zeitdifferenz = 12.0f*acosf((sinf(h) - sinf(B)*sinf(DK)) / (cosf(B)*cosf(DK)))/pi;
  float AufgangOrtszeit = 12.0f - Zeitdifferenz - Zeitgleichung;
  float UntergangOrtszeit = 12.0f + Zeitdifferenz - Zeitgleichung;
  float AufgangWeltzeit = AufgangOrtszeit - GeographischeLaenge / 15.0f;
  float UntergangWeltzeit = UntergangOrtszeit - GeographischeLaenge / 15.0f;
  float Aufgang = AufgangWeltzeit + Zeitzone;         // In Stunden
  if (Aufgang < 0.0f) {
    Aufgang += 24.0f;
  } else {
    if (Aufgang >= 24.0f) Aufgang -= 24.0f;
  }
  float Untergang = UntergangWeltzeit + Zeitzone;
  if (Untergang < 0.0f) {
    Untergang += 24.0f;
  } else {
    if (Untergang >= 24.0f) Untergang -= 24.0f;
  }
  int AufgangMinuten = (int)(60.0f*(Aufgang - (int)Aufgang)+0.5f);
  int AufgangStunden = (int)Aufgang;
  if (AufgangMinuten >= 60.0f) {
    AufgangMinuten -= 60.0f;
    AufgangStunden++;
  } else {
    if (AufgangMinuten < 0.0f) {
      AufgangMinuten += 60.0f;
      AufgangStunden--;
      if (AufgangStunden < 0.0f) AufgangStunden += 24.0f;
    }
  }
  int UntergangMinuten = (int)(60.0f*(Untergang - (int)Untergang)+0.5f);
  int UntergangStunden = (int)Untergang;
  if (UntergangMinuten >= 60.0f) {
    UntergangMinuten -= 60.0f;
    UntergangStunden++;
  } else {
    if (UntergangMinuten<0) {
      UntergangMinuten += 60.0f;
      UntergangStunden--;
      if (UntergangStunden < 0.0f) UntergangStunden += 24.0f;
    }
  }
  *hour_up = AufgangStunden;
  *minute_up = AufgangMinuten;
  *hour_down = UntergangStunden;
  *minute_down = UntergangMinuten;
}

void ApplyTimerOffsets(Timer *duskdawn)
{
  uint8_t hour[2];
  uint8_t minute[2];
  Timer stored = (Timer)*duskdawn;

  // replace hours, minutes by sunrise
  DuskTillDawn(&hour[0], &minute[0], &hour[1], &minute[1]);
  uint8_t mode = (duskdawn->mode -1) &1;
  duskdawn->time = (hour[mode] *60) + minute[mode];

  // apply offsets, check for over- and underflows
  uint16_t timeBuffer;
  if ((uint16_t)stored.time > 719) {
    // negative offset, time after 12:00
    timeBuffer = (uint16_t)stored.time - 720;
    // check for underflow
    if (timeBuffer > (uint16_t)duskdawn->time) {
      timeBuffer = 1440 - (timeBuffer - (uint16_t)duskdawn->time);
      duskdawn->days = duskdawn->days >> 1;
      duskdawn->days |= (stored.days << 6);
    } else {
      timeBuffer = (uint16_t)duskdawn->time - timeBuffer;
    }
  } else {
    // positive offset
    timeBuffer = (uint16_t)duskdawn->time + (uint16_t)stored.time;
    // check for overflow
    if (timeBuffer > 1440) {
      timeBuffer -= 1440;
      duskdawn->days = duskdawn->days << 1;
      duskdawn->days |= (stored.days >> 6);
    }
  }
  duskdawn->time = timeBuffer;
}

String GetSun(uint32_t dawn)
{
  char stime[6];

  uint8_t hour[2];
  uint8_t minute[2];

  DuskTillDawn(&hour[0], &minute[0], &hour[1], &minute[1]);
  dawn &= 1;
  snprintf_P(stime, sizeof(stime), PSTR("%02d:%02d"), hour[dawn], minute[dawn]);
  return String(stime);
}

uint16_t SunMinutes(uint32_t dawn)
{
  uint8_t hour[2];
  uint8_t minute[2];

  DuskTillDawn(&hour[0], &minute[0], &hour[1], &minute[1]);
  dawn &= 1;
  return (hour[dawn] *60) + minute[dawn];
}

#endif  // USE_SUNRISE

/*******************************************************************************************/

void TimerSetRandomWindow(uint32_t index)
{
  timer_window[index] = 0;
  if (Settings.timer[index].window) {
    timer_window[index] = (random(0, (Settings.timer[index].window << 1) +1)) - Settings.timer[index].window;  // -15 .. 15
  }
}

void TimerSetRandomWindows(void)
{
  for (uint32_t i = 0; i < MAX_TIMERS; i++) { TimerSetRandomWindow(i); }
}

void TimerEverySecond(void)
{
  if (RtcTime.valid) {
    if (!RtcTime.hour && !RtcTime.minute && !RtcTime.second) { TimerSetRandomWindows(); }  // Midnight
    if (Settings.flag3.timers_enable &&                            // CMND_TIMERS
        (uptime > 60) && (RtcTime.minute != timer_last_minute)) {  // Execute from one minute after restart every minute only once
      timer_last_minute = RtcTime.minute;
      int32_t time = (RtcTime.hour *60) + RtcTime.minute;
      uint8_t days = 1 << (RtcTime.day_of_week -1);

      for (uint32_t i = 0; i < MAX_TIMERS; i++) {
//        if (Settings.timer[i].device >= devices_present) Settings.timer[i].data = 0;  // Reset timer due to change in devices present
        Timer xtimer = Settings.timer[i];
#ifdef USE_SUNRISE
        if ((1 == xtimer.mode) || (2 == xtimer.mode)) {      // Sunrise or Sunset
          ApplyTimerOffsets(&xtimer);
        }
#endif
        if (xtimer.arm) {
          int32_t set_time = xtimer.time + timer_window[i];  // Add random time offset
          if (set_time < 0) {
            set_time = abs(timer_window[i]);                 // After midnight and within negative window so stay today but allow positive randomness;
          }
          if (set_time > 1439) {
            set_time = xtimer.time - abs(timer_window[i]);   // Before midnight and within positive window so stay today but allow negative randomness;
          }
          if (set_time > 1439) { set_time = 1439; }          // Stay today

          DEBUG_DRIVER_LOG(PSTR("TIM: Timer %d, Time %d, Window %d, SetTime %d"), i +1, xtimer.time, timer_window[i], set_time);

          if (time == set_time) {
            if (xtimer.days & days) {
              Settings.timer[i].arm = xtimer.repeat;
#if defined(USE_RULES) || defined(USE_SCRIPT)
              if (POWER_BLINK == xtimer.power) {             // Blink becomes Rule disregarding device and allowing use of Backlog commands
                Response_P(PSTR("{\"Clock\":{\"Timer\":%d}}"), i +1);
                XdrvRulesProcess();
              } else
#endif  // USE_RULES
                if (devices_present) { ExecuteCommandPower(xtimer.device +1, xtimer.power, SRC_TIMER); }
            }
          }
        }
      }
    }
  }
}

void PrepShowTimer(uint32_t index)
{
  Timer xtimer = Settings.timer[index -1];

  char days[8] = { 0 };
  for (uint32_t i = 0; i < 7; i++) {
    uint8_t mask = 1 << i;
    snprintf(days, sizeof(days), "%s%d", days, ((xtimer.days & mask) > 0));
  }

  char soutput[80];
  soutput[0] = '\0';
  if (devices_present) {
    snprintf_P(soutput, sizeof(soutput), PSTR(",\"" D_JSON_TIMER_OUTPUT "\":%d"), xtimer.device +1);
  }
#ifdef USE_SUNRISE
  char sign[2] = { 0 };
  int16_t hour = xtimer.time / 60;
  if ((1 == xtimer.mode) || (2 == xtimer.mode)) {  // Sunrise or Sunset
    if (hour > 11) {
      hour -= 12;
      sign[0] = '-';
    }
  }
  ResponseAppend_P(PSTR("\"" D_CMND_TIMER "%d\":{\"" D_JSON_TIMER_ARM "\":%d,\"" D_JSON_TIMER_MODE "\":%d,\"" D_JSON_TIMER_TIME "\":\"%s%02d:%02d\",\"" D_JSON_TIMER_WINDOW "\":%d,\"" D_JSON_TIMER_DAYS "\":\"%s\",\"" D_JSON_TIMER_REPEAT "\":%d%s,\"" D_JSON_TIMER_ACTION "\":%d}"),
    index, xtimer.arm, xtimer.mode, sign, hour, xtimer.time % 60, xtimer.window, days, xtimer.repeat, soutput, xtimer.power);
#else
  ResponseAppend_P(PSTR("\"" D_CMND_TIMER "%d\":{\"" D_JSON_TIMER_ARM "\":%d,\"" D_JSON_TIMER_TIME "\":\"%02d:%02d\",\"" D_JSON_TIMER_WINDOW "\":%d,\"" D_JSON_TIMER_DAYS "\":\"%s\",\"" D_JSON_TIMER_REPEAT "\":%d%s,\"" D_JSON_TIMER_ACTION "\":%d}"),
    index, xtimer.arm, xtimer.time / 60, xtimer.time % 60, xtimer.window, days, xtimer.repeat, soutput, xtimer.power);
#endif  // USE_SUNRISE
}

/*********************************************************************************************\
 * Commands
\*********************************************************************************************/

void CmndTimer(void)
{
  uint32_t index = XdrvMailbox.index;
  if ((index > 0) && (index <= MAX_TIMERS)) {
    uint32_t error = 0;
    if (XdrvMailbox.data_len) {
      if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= MAX_TIMERS)) {
        if (XdrvMailbox.payload == 0) {
          Settings.timer[index -1].data = 0;  // Clear timer
        } else {
          Settings.timer[index -1].data = Settings.timer[XdrvMailbox.payload -1].data;  // Copy timer
        }
      } else {
//#ifndef USE_RULES
#if defined(USE_RULES)==0 && defined(USE_SCRIPT)==0
        if (devices_present) {
#endif
          char dataBufUc[XdrvMailbox.data_len + 1];
          UpperCase(dataBufUc, XdrvMailbox.data);
          StaticJsonBuffer<256> jsonBuffer;
          JsonObject& root = jsonBuffer.parseObject(dataBufUc);
          if (!root.success()) {
            Response_P(PSTR("{\"" D_CMND_TIMER "%d\":\"" D_JSON_INVALID_JSON "\"}"), index); // JSON decode failed
            error = 1;
          }
          else {
            char parm_uc[10];
            index--;
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_ARM))].success()) {
              Settings.timer[index].arm = (root[parm_uc] != 0);
            }
#ifdef USE_SUNRISE
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_MODE))].success()) {
              Settings.timer[index].mode = (uint8_t)root[parm_uc] & 0x03;
            }
#endif
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_TIME))].success()) {
              uint16_t itime = 0;
              int8_t value = 0;
              uint8_t sign = 0;
              char time_str[10];

              strlcpy(time_str, root[parm_uc], sizeof(time_str));
              const char *substr = strtok(time_str, ":");
              if (substr != nullptr) {
                if (strchr(substr, '-')) {
                  sign = 1;
                  substr++;
                }
                value = atoi(substr);
                if (sign) { value += 12; }  // Allow entering timer offset from -11:59 to -00:01 converted to 12:01 to 23:59
                if (value > 23) { value = 23; }
                itime = value * 60;
                substr = strtok(nullptr, ":");
                if (substr != nullptr) {
                  value = atoi(substr);
                  if (value < 0) { value = 0; }
                  if (value > 59) { value = 59; }
                  itime += value;
                }
              }
              Settings.timer[index].time = itime;
            }
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_WINDOW))].success()) {
              Settings.timer[index].window = (uint8_t)root[parm_uc] & 0x0F;
              TimerSetRandomWindow(index);
            }
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_DAYS))].success()) {
              // SMTWTFS = 1234567 = 0011001 = 00TW00S = --TW--S
              Settings.timer[index].days = 0;
              const char *tday = root[parm_uc];
              uint8_t i = 0;
              char ch = *tday++;
              while ((ch != '\0') && (i < 7)) {
                if (ch == '-') { ch = '0'; }
                uint8_t mask = 1 << i++;
                Settings.timer[index].days |= (ch == '0') ? 0 : mask;
                ch = *tday++;
              }
            }
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_REPEAT))].success()) {
              Settings.timer[index].repeat = (root[parm_uc] != 0);
            }
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_OUTPUT))].success()) {
              uint8_t device = ((uint8_t)root[parm_uc] -1) & 0x0F;
              Settings.timer[index].device = (device < devices_present) ? device : 0;
            }
            if (root[UpperCase_P(parm_uc, PSTR(D_JSON_TIMER_ACTION))].success()) {
              uint8_t action = (uint8_t)root[parm_uc] & 0x03;
              Settings.timer[index].power = (devices_present) ? action : 3;  // If no devices than only allow rules
            }

            index++;
          }
//#ifndef USE_RULES
#if defined(USE_RULES)==0 && defined(USE_SCRIPT)==0
        } else {
          Response_P(PSTR("{\"" D_CMND_TIMER "%d\":\"" D_JSON_TIMER_NO_DEVICE "\"}"), index);  // No outputs defined so nothing to control
          error = 1;
        }
#endif
      }
    }
    if (!error) {
      Response_P(PSTR("{"));
      PrepShowTimer(index);
      ResponseJsonEnd();
    }
  }
}

void CmndTimers(void)
{
  if (XdrvMailbox.data_len) {
    if ((XdrvMailbox.payload >= 0) && (XdrvMailbox.payload <= 1)) {
      Settings.flag3.timers_enable = XdrvMailbox.payload;            // CMND_TIMERS
    }
    if (XdrvMailbox.payload == 2) {
      Settings.flag3.timers_enable = !Settings.flag3.timers_enable;  // CMND_TIMERS
    }
  }

  ResponseCmndStateText(Settings.flag3.timers_enable);               // CMND_TIMERS
  MqttPublishPrefixTopic_P(RESULT_OR_STAT, XdrvMailbox.command);

  uint32_t jsflg = 0;
  uint32_t lines = 1;
  for (uint32_t i = 0; i < MAX_TIMERS; i++) {
    if (!jsflg) {
      Response_P(PSTR("{\"" D_CMND_TIMERS "%d\":{"), lines++);
    } else {
      ResponseAppend_P(PSTR(","));
    }
    jsflg++;
    PrepShowTimer(i +1);
    if (jsflg > 3) {
      ResponseJsonEndEnd();
      MqttPublishPrefixTopic_P(RESULT_OR_STAT, PSTR(D_CMND_TIMERS));
      jsflg = 0;
    }
  }
  mqtt_data[0] = '\0';
}

#ifdef USE_SUNRISE
void CmndLongitude(void)
{
  if (XdrvMailbox.data_len) {
    Settings.longitude = (int)(CharToFloat(XdrvMailbox.data) *1000000);
  }
  ResponseCmndFloat((float)(Settings.longitude) /1000000, 6);
}

void CmndLatitude(void)
{
  if (XdrvMailbox.data_len) {
    Settings.latitude = (int)(CharToFloat(XdrvMailbox.data) *1000000);
  }
  ResponseCmndFloat((float)(Settings.latitude) /1000000, 6);
}
#endif  // USE_SUNRISE

/*********************************************************************************************\
 * Presentation
\*********************************************************************************************/

#ifdef USE_WEBSERVER
#ifdef USE_TIMERS_WEB

#define WEB_HANDLE_TIMER "tm"

const char S_CONFIGURE_TIMER[] PROGMEM = D_CONFIGURE_TIMER;

const char HTTP_BTN_MENU_TIMER[] PROGMEM =
  "<p><form action='" WEB_HANDLE_TIMER "' method='get'><button>" D_CONFIGURE_TIMER "</button></form></p>";

const char HTTP_TIMER_SCRIPT1[] PROGMEM =
  "var pt=[],ct=99;"
  "function ce(i,q){"                                             // Create select option
    "var o=document.createElement('option');"
    "o.textContent=i;"
    "q.appendChild(o);"
  "}";
#ifdef USE_SUNRISE
const char HTTP_TIMER_SCRIPT2[] PROGMEM =
  "function gt(){"                                                // Set hours and minutes according to mode
    "var m,p,q;"
    "m=qs('input[name=\"rd\"]:checked').value;"                   // Get mode
    "p=pt[ct]&0x7FF;"                                             // Get time
    "if(m==0){"                                                   // Time is set
      "so(0);"                                                    // Hide offset span and allow Hour 00..23
      "q=Math.floor(p/60);if(q<10){q='0'+q;}qs('#ho').value=q;"   // Set hours
      "q=p%%60;if(q<10){q='0'+q;}qs('#mi').value=q;"               // Set minutes
    "}"
    "if((m==1)||(m==2)){"                                         // Sunrise or sunset is set
      "so(1);"                                                    // Show offset span and allow Hour 00..11
      "q=Math.floor(p/60);"                                       // Parse hours
      "if(q>=12){q-=12;qs('#dr').selectedIndex=1;}"               // Negative offset
        "else{qs('#dr').selectedIndex=0;}"
      "if(q<10){q='0'+q;}qs('#ho').value=q;"                      // Set offset hours
      "q=p%%60;if(q<10){q='0'+q;}qs('#mi').value=q;"               // Set offset minutes
    "}"
  "}"
  "function so(b){"                                               // Hide or show offset items
    "o=qs('#ho');"
    "e=o.childElementCount;"
    "if(b==1){"
      "qs('#dr').style.visibility='';"
      "if(e>12){for(i=12;i<=23;i++){o.removeChild(o.lastElementChild);}}"  // Create offset hours select options
    "}else{"
      "qs('#dr').style.visibility='hidden';"
      "if(e<23){for(i=12;i<=23;i++){ce(i,o);}}"                   // Create hours select options
    "}"
  "}";
#endif
const char HTTP_TIMER_SCRIPT3[] PROGMEM =
  "function st(){"                                                // Save parameters to hidden area
    "var i,l,m,n,p,s;"
    "m=0;s=0;"
    "n=1<<31;if(eb('a0').checked){s|=n;}"                         // Get arm
    "n=1<<15;if(eb('r0').checked){s|=n;}"                         // Get repeat
    "for(i=0;i<7;i++){n=1<<(16+i);if(eb('w'+i).checked){s|=n;}}"  // Get weekdays
#ifdef USE_SUNRISE
    "m=qs('input[name=\"rd\"]:checked').value;"                   // Check mode
    "s|=(qs('input[name=\"rd\"]:checked').value<<29);"            // Get mode
#endif
    "if(%d>0){"
      "i=qs('#d1').selectedIndex;if(i>=0){s|=(i<<23);}"           // Get output
      "s|=(qs('#p1').selectedIndex<<27);"                         // Get action
    "}else{"
      "s|=3<<27;"                                                 // Get action (rule)
    "}"
    "l=((qs('#ho').selectedIndex*60)+qs('#mi').selectedIndex)&0x7FF;"
    "if(m==0){s|=l;}"                                             // Get time
#ifdef USE_SUNRISE
    "if((m==1)||(m==2)){"
      "if(qs('#dr').selectedIndex>0){if(l>0){l+=720;}}"           // If negative offset and delta-time > 0, add 12h to given offset time
      "s|=l&0x7FF;"                                               // Save offset instead of time
    "}"
#endif
    "s|=((qs('#mw').selectedIndex)&0x0F)<<11;"                    // Get window minutes
    "pt[ct]=s;"
    "eb('t0').value=pt.join();"                                   // Save parameters from array to hidden area
  "}";
const char HTTP_TIMER_SCRIPT4[] PROGMEM =
  "function ot(t,e){"                                             // Select tab and update elements
    "var i,n,o,p,q,s;"
    "if(ct<99){st();}"                                            // Save changes
    "ct=t;"
    "o=document.getElementsByClassName('tl');"                    // Restore style to all tabs/buttons
    "for(i=0;i<o.length;i++){o[i].style.cssText=\"background:#%06x;color:#%06x;font-weight:normal;\"}"  // COLOR_TIMER_TAB_BACKGROUND, COLOR_TIMER_TAB_TEXT
    "e.style.cssText=\"background:#%06x;color:#%06x;font-weight:bold;\";"  // COLOR_FORM, COLOR_TEXT, Change style to tab/button used to open content
    "s=pt[ct];"                                                   // Get parameters from array
#ifdef USE_SUNRISE
    "p=(s>>29)&3;eb('b'+p).checked=1;"                            // Set mode
    "gt();"                                                       // Set hours and minutes according to mode
#else
    "p=s&0x7FF;"                                                  // Get time
    "q=Math.floor(p/60);if(q<10){q='0'+q;}qs('#ho').value=q;"     // Set hours
    "q=p%%60;if(q<10){q='0'+q;}qs('#mi').value=q;"                // Set minutes
#endif
    "q=(s>>11)&0xF;if(q<10){q='0'+q;}qs('#mw').value=q;"          // Set window minutes
    "for(i=0;i<7;i++){p=(s>>(16+i))&1;eb('w'+i).checked=p;}"      // Set weekdays
    "if(%d>0){"
      "p=(s>>23)&0xF;qs('#d1').value=p+1;"                        // Set output
      "p=(s>>27)&3;qs('#p1').selectedIndex=p;"                    // Set action
    "}"
    "p=(s>>15)&1;eb('r0').checked=p;"                             // Set repeat
    "p=(s>>31)&1;eb('a0').checked=p;"                             // Set arm
  "}";
const char HTTP_TIMER_SCRIPT5[] PROGMEM =
  "function it(){"                                                // Initialize elements and select first tab
    "var b,i,o,s;"
    "pt=eb('t0').value.split(',').map(Number);"                   // Get parameters from hidden area to array
    "s='';"
    "for(i=0;i<%d;i++){"
      "b='';"
      "if(0==i){b=\" id='dP'\";}"
      "s+=\"<button type='button' class='tl' onclick='ot(\"+i+\",this)'\"+b+\">\"+(i+1)+\"</button>\""
    "}"
    "eb('bt').innerHTML=s;"                                       // Create tabs
    "if(%d>0){"                                                   // Create Output and Action drop down boxes
      "eb('oa').innerHTML=\"<b>" D_TIMER_OUTPUT "</b>&nbsp;<span><select style='width:60px;' id='d1'></select></span>&emsp;<b>" D_TIMER_ACTION "</b>&nbsp;<select style='width:99px;' id='p1'></select>\";"
      "o=qs('#p1');ce('" D_OFF "',o);ce('" D_ON "',o);ce('" D_TOGGLE "',o);"  // Create offset direction select options
#if defined(USE_RULES) || defined(USE_SCRIPT)
      "ce('" D_RULE "',o);"
#else
      "ce('" D_BLINK "',o);"
#endif
    "}else{"
      "eb('oa').innerHTML=\"<b>" D_TIMER_ACTION "</b> " D_RULE "\";"  // No outputs but rule is allowed
    "}";
const char HTTP_TIMER_SCRIPT6[] PROGMEM =
#ifdef USE_SUNRISE
    "o=qs('#dr');ce('+',o);ce('-',o);"                            // Create offset direction select options
#endif
    "o=qs('#ho');for(i=0;i<=23;i++){ce((i<10)?('0'+i):i,o);}"     // Create hours select options
    "o=qs('#mi');for(i=0;i<=59;i++){ce((i<10)?('0'+i):i,o);}"     // Create minutes select options
    "o=qs('#mw');for(i=0;i<=15;i++){ce((i<10)?('0'+i):i,o);}"     // Create window minutes select options
    "o=qs('#d1');for(i=0;i<%d;i++){ce(i+1,o);}"                   // Create outputs
    "var a='" D_DAY3LIST "';"
    "s='';for(i=0;i<7;i++){s+=\"<input id='w\"+i+\"' type='checkbox'><b>\"+a.substring(i*3,(i*3)+3)+\"</b> \"}"
    "eb('ds').innerHTML=s;"                                       // Create weekdays
    "eb('dP').click();"                                           // Get the element with id='dP' and click on it
  "}"
  "wl(it);";
const char HTTP_TIMER_STYLE[] PROGMEM =
  ".tl{float:left;border-radius:0;border:1px solid #%06x;padding:1px;width:6.25%%;}";  // COLOR_FORM, Border color needs to be the same as Fieldset background color from HTTP_HEAD_STYLE1 (transparent won't work)
const char HTTP_FORM_TIMER1[] PROGMEM =
  "<fieldset style='min-width:470px;text-align:center;'>"
  "<legend style='text-align:left;'><b>&nbsp;" D_TIMER_PARAMETERS "&nbsp;</b></legend>"
  "<form method='post' action='" WEB_HANDLE_TIMER "' onsubmit='return st();'>"
  "<br><input id='e0' type='checkbox'%s><b>" D_TIMER_ENABLE "</b><br><br><hr>"
  "<input id='t0' value='";
const char HTTP_FORM_TIMER2[] PROGMEM =
  "' hidden><div id='bt'></div><br><br><br>"
  "<div id='oa' name='oa'></div><br>"
  "<div>"
  "<input id='a0' type='checkbox'><b>" D_TIMER_ARM "</b>&emsp;"
  "<input id='r0' type='checkbox'><b>" D_TIMER_REPEAT "</b>"
  "</div><br>"
  "<div>";
#ifdef USE_SUNRISE
const char HTTP_FORM_TIMER3[] PROGMEM =
  "<fieldset style='width:%dpx;margin:auto;text-align:left;border:0;'>"
  "<input id='b0' name='rd' type='radio' value='0' onclick='gt();'><b>" D_TIMER_TIME "</b><br>"
  "<input id='b1' name='rd' type='radio' value='1' onclick='gt();'><b>" D_SUNRISE "</b> (%s)<br>"
  "<input id='b2' name='rd' type='radio' value='2' onclick='gt();'><b>" D_SUNSET "</b> (%s)<br>"
  "</fieldset>"
  "<p></p>"
  "<span><select style='width:46px;' id='dr'></select></span>"
  "&nbsp;";
#else
const char HTTP_FORM_TIMER3[] PROGMEM =
  "<b>" D_TIMER_TIME "</b>&nbsp;";
#endif  // USE_SUNRISE
const char HTTP_FORM_TIMER4[] PROGMEM =
  "<span><select style='width:60px;' id='ho'></select></span>"
  "&nbsp;" D_HOUR_MINUTE_SEPARATOR "&nbsp;"
  "<span><select style='width:60px;' id='mi'></select></span>"
  "&emsp;<b>+/-</b>&nbsp;"
  "<span><select style='width:60px;' id='mw'></select></span>"
  "</div><br>"
  "<div id='ds' name='ds'></div>";

void HandleTimerConfiguration(void)
{
  if (!HttpCheckPriviledgedAccess()) { return; }

  AddLog_P(LOG_LEVEL_DEBUG, S_LOG_HTTP, S_CONFIGURE_TIMER);

  if (WebServer->hasArg("save")) {
    TimerSaveSettings();
    HandleConfiguration();
    return;
  }

  WSContentStart_P(S_CONFIGURE_TIMER);
  WSContentSend_P(HTTP_TIMER_SCRIPT1);
#ifdef USE_SUNRISE
  WSContentSend_P(HTTP_TIMER_SCRIPT2);
#endif  // USE_SUNRISE
  WSContentSend_P(HTTP_TIMER_SCRIPT3, devices_present);
  WSContentSend_P(HTTP_TIMER_SCRIPT4, WebColor(COL_TIMER_TAB_BACKGROUND), WebColor(COL_TIMER_TAB_TEXT), WebColor(COL_FORM), WebColor(COL_TEXT), devices_present);
  WSContentSend_P(HTTP_TIMER_SCRIPT5, MAX_TIMERS, devices_present);
  WSContentSend_P(HTTP_TIMER_SCRIPT6, devices_present);
  WSContentSendStyle_P(HTTP_TIMER_STYLE, WebColor(COL_FORM));
  WSContentSend_P(HTTP_FORM_TIMER1, (Settings.flag3.timers_enable) ? " checked" : "");  // CMND_TIMERS
  for (uint32_t i = 0; i < MAX_TIMERS; i++) {
    WSContentSend_P(PSTR("%s%u"), (i > 0) ? "," : "", Settings.timer[i].data);
  }
  WSContentSend_P(HTTP_FORM_TIMER2);
#ifdef USE_SUNRISE
  WSContentSend_P(HTTP_FORM_TIMER3, 100 + (strlen(D_SUNSET) *12), GetSun(0).c_str(), GetSun(1).c_str());
#else
  WSContentSend_P(HTTP_FORM_TIMER3);
#endif  // USE_SUNRISE
  WSContentSend_P(HTTP_FORM_TIMER4);
  WSContentSend_P(HTTP_FORM_END);
  WSContentSpaceButton(BUTTON_CONFIGURATION);
  WSContentStop();
}

void TimerSaveSettings(void)
{
  char tmp[MAX_TIMERS *12];  // Need space for MAX_TIMERS x 10 digit numbers separated by a comma
  char message[LOGSZ];
  Timer timer;

  Settings.flag3.timers_enable = WebServer->hasArg("e0");  // CMND_TIMERS
  WebGetArg("t0", tmp, sizeof(tmp));
  char *p = tmp;
  snprintf_P(message, sizeof(message), PSTR(D_LOG_MQTT D_CMND_TIMERS " %d"), Settings.flag3.timers_enable);  // CMND_TIMERS
  for (uint32_t i = 0; i < MAX_TIMERS; i++) {
    timer.data = strtol(p, &p, 10);
    p++;  // Skip comma
    if (timer.time < 1440) {
      bool flag = (timer.window != Settings.timer[i].window);
      Settings.timer[i].data = timer.data;
      if (flag) TimerSetRandomWindow(i);
    }
    snprintf_P(message, sizeof(message), PSTR("%s,0x%08X"), message, Settings.timer[i].data);
  }
  AddLog_P(LOG_LEVEL_DEBUG, message);
}
#endif  // USE_TIMERS_WEB
#endif  // USE_WEBSERVER

/*********************************************************************************************\
 * Interface
\*********************************************************************************************/

bool Xdrv09(uint8_t function)
{
  bool result = false;

  switch (function) {
    case FUNC_PRE_INIT:
      TimerSetRandomWindows();
      break;
#ifdef USE_WEBSERVER
#ifdef USE_TIMERS_WEB
    case FUNC_WEB_ADD_BUTTON:
#if defined(USE_RULES) || defined(USE_SCRIPT)
      WSContentSend_P(HTTP_BTN_MENU_TIMER);
#else
      if (devices_present) { WSContentSend_P(HTTP_BTN_MENU_TIMER); }
#endif  // USE_RULES
      break;
    case FUNC_WEB_ADD_HANDLER:
      WebServer->on("/" WEB_HANDLE_TIMER, HandleTimerConfiguration);
      break;
#endif  // USE_TIMERS_WEB
#endif  // USE_WEBSERVER
    case FUNC_EVERY_SECOND:
      TimerEverySecond();
      break;
    case FUNC_COMMAND:
      result = DecodeCommand(kTimerCommands, TimerCommand);
      break;
  }
  return result;
}

#endif  // USE_TIMERS