/*
Copyright (c) 2017 Theo Arends.  All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

- Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
*/

/*********************************************************************************************\
 * Sonoff Led
\*********************************************************************************************/

#define ANALOG_WRITE_RANGE  255  // 127..1023 but as Color is addressed by 8 bits it should be 255 for my code
#define ANALOG_WRITE_FREQ   432  // 100..1000 Hz led refresh 

uint8_t ledTable[] = {
    0,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
    1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
    1,  2,  2,  2,  2,  2,  2,  2,  2,  3,  3,  3,  3,  3,  4,  4,
    4,  4,  4,  5,  5,  5,  5,  6,  6,  6,  6,  7,  7,  7,  7,  8,
    8,  8,  9,  9,  9, 10, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14,
   14, 15, 15, 15, 16, 16, 17, 17, 18, 18, 19, 19, 20, 20, 21, 22,
   22, 23, 23, 24, 25, 25, 26, 26, 27, 28, 28, 29, 30, 30, 31, 32,
   33, 33, 34, 35, 36, 36, 37, 38, 39, 40, 40, 41, 42, 43, 44, 45,
   46, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60,
   61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 72, 73, 75, 76, 77, 78,
   80, 81, 82, 83, 85, 86, 87, 89, 90, 91, 93, 94, 95, 97, 98, 99,
  101,102,104,105,107,108,110,111,113,114,116,117,119,121,122,124,
  125,127,129,130,132,134,135,137,139,141,142,144,146,148,150,151,
  153,155,157,159,161,163,165,166,168,170,172,174,176,178,180,182,
  184,186,189,191,193,195,197,199,201,204,206,208,210,212,215,217,
  219,221,224,226,228,231,233,235,238,240,243,245,248,250,253,255 };

uint8_t sl_dcolor[2], sl_tcolor[2], sl_lcolor[2];

uint8_t sl_power;
uint8_t sl_blankv;
uint8_t sl_any;
uint8_t sl_wakeupActive = 0;
uint8_t sl_wakeupDimmer = 0;
uint16_t sl_wakeupCntr = 0;

uint32_t Atoh(char *s)
{
  uint32_t value = 0, digit;
  int8_t c;
  
  while((c = *s++)){
    if('0' <= c && c <= '9')
      digit = c - '0';
    else if('A' <= c && c <= 'F')
      digit = c - 'A' + 10;
    else if('a' <= c && c<= 'f')
      digit = c - 'a' + 10;
    else break;
    value = (value << 4) | digit;
  }
  return value;
}

void sl_setDim(uint8_t myDimmer)
{
  float newDim, fmyCld, fmyWrm;
  
  newDim = 100 / (float)myDimmer;
  fmyCld = (float)sysCfg.led_color[0] / newDim;
  fmyWrm = (float)sysCfg.led_color[1] / newDim;
  sl_dcolor[0] = (uint8_t)fmyCld;
  sl_dcolor[1] = (uint8_t)fmyWrm;
}

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

void sl_init(void)
{
  analogWriteRange(ANALOG_WRITE_RANGE);  // Default is 1023 (Arduino.h)
  analogWriteFreq(ANALOG_WRITE_FREQ);    // Default is 1000 (core_esp8266_wiring_pwm.c) - Try to lower flicker
  sl_blankv = 0;
  sl_power = 0;
  sl_any = 0;
  sl_wakeupActive = 0;
}

void sl_blank(byte state)
{
// Called by interrupt disabling routines like OTA or web upload
// state = 0: No blank
//         1: Blank led to solve flicker

  if (sysCfg.module == SONOFF_LED) {
    sl_blankv = state;
    sl_wakeupActive = 0;
    sl_animate();
  }
}

void sl_setPower(uint8_t power)
{
  sl_blankv = 0;
  sl_power = power &1;
  sl_wakeupActive = 0;
  sl_animate();
}

void sl_animate()
{
// {"Wakeup":"Done"}
  char svalue[32];  // was MESSZ
  uint8_t fadeValue;
  
  if ((sl_power == 0) || sl_blankv) {  // Power Off
    sl_tcolor[0] = 0;
    sl_tcolor[1] = 0;
  }
  else {
    if (!sl_wakeupActive) {  // Power On
      sl_setDim(sysCfg.led_dimmer[0]);
      if (sysCfg.led_fade == 0) {
        sl_tcolor[0] = sl_dcolor[0];
        sl_tcolor[1] = sl_dcolor[1];
      } else {
        if ((sl_tcolor[0] != sl_dcolor[0]) || (sl_tcolor[1] != sl_dcolor[1])) {
          if (sl_tcolor[0] < sl_dcolor[0]) sl_tcolor[0] += ((sl_dcolor[0] - sl_tcolor[0]) >> sysCfg.led_speed) +1;
          if (sl_tcolor[1] < sl_dcolor[1]) sl_tcolor[1] += ((sl_dcolor[1] - sl_tcolor[1]) >> sysCfg.led_speed) +1;
          if (sl_tcolor[0] > sl_dcolor[0]) sl_tcolor[0] -= ((sl_tcolor[0] - sl_dcolor[0]) >> sysCfg.led_speed) +1;
          if (sl_tcolor[1] > sl_dcolor[1]) sl_tcolor[1] -= ((sl_tcolor[1] - sl_dcolor[1]) >> sysCfg.led_speed) +1;
        }
      }
    } else {   // Power On using wak up duration
      if (sl_wakeupActive == 1) {
        sl_wakeupActive = 2;
        sl_tcolor[0] = 0;
        sl_tcolor[1] = 0;
        sl_wakeupCntr = 0;
        sl_wakeupDimmer = 0;
      }
      sl_wakeupCntr++;
      if (sl_wakeupCntr > ((sysCfg.led_wakeup * STATES) / sysCfg.led_dimmer[0])) {
        sl_wakeupCntr = 0;
        sl_wakeupDimmer++;
        if (sl_wakeupDimmer <= sysCfg.led_dimmer[0]) {
          sl_setDim(sl_wakeupDimmer);
          sl_tcolor[0] = sl_dcolor[0];
          sl_tcolor[1] = sl_dcolor[1];
        } else {
          snprintf_P(svalue, sizeof(svalue), PSTR("{\"Wakeup\":\"Done\"}"));
          mqtt_publish_topic_P(1, PSTR("WAKEUP"), svalue);
          sl_wakeupActive = 0;
        }
      }
    }
  }
  if ((sl_lcolor[0] != sl_tcolor[0]) || (sl_lcolor[1] != sl_tcolor[1]) || sl_any) {
    sl_any = 0;
    sl_lcolor[0] = sl_tcolor[0];
    sl_lcolor[1] = sl_tcolor[1];
    for (byte i = 0; i < 2; i++) {
      if (pin[GPIO_PWM0 +i] < 99) {
        analogWrite(pin[GPIO_PWM0 +i], (sysCfg.led_table) ? ledTable[sl_lcolor[i]] : sl_lcolor[i]);
      }
    }
  }
}

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

boolean sl_command(char *type, uint16_t index, char *dataBufUc, uint16_t data_len, int16_t payload, char *svalue, uint16_t ssvalue)
{
  boolean serviced = true;

  if (!strcmp(type,"COLOR")) {
    uint8_t my_color[5];
    if (data_len == 4) {
      char ccold[3], cwarm[3];
      memcpy(ccold, dataBufUc, 2);
      ccold[2] = '\0';
      memcpy(cwarm, dataBufUc + 2, 2);
      cwarm[2] = '\0';
      my_color[0] = Atoh(ccold);
      my_color[1] = Atoh(cwarm);
      uint16_t temp = my_color[0];
      if (temp < my_color[1]) temp = my_color[1];
      float mDim = (float)temp / 2.55;
      sysCfg.led_dimmer[0] = (uint8_t)mDim;
      float newDim = 100 / mDim;
      float fmyCold = (float)my_color[0] * newDim;
      float fmyWarm = (float)my_color[1] * newDim;
      sysCfg.led_color[0] = (uint8_t)fmyCold;
      sysCfg.led_color[1] = (uint8_t)fmyWarm;
      do_cmnd_power(index, 1);
#ifdef USE_DOMOTICZ
      mqtt_publishDomoticzPowerState(index);
#endif  // USE_DOMOTICZ
    }
    sl_setDim(sysCfg.led_dimmer[0]);
    uint16_t color = (uint16_t)sl_dcolor[0] << 8;
    color += (uint16_t)sl_dcolor[1];
    snprintf_P(svalue, ssvalue, PSTR("{\"Color\":\"%04X\"}"), color);
  }
  else if (!strcmp(type,"DIMMER")) {
    if ((data_len > 0) && (payload >= 0) && (payload <= 100)) {
      sysCfg.led_dimmer[0] = payload;
      do_cmnd_power(index, 1);
#ifdef USE_DOMOTICZ
      mqtt_publishDomoticzPowerState(index);
#endif  // USE_DOMOTICZ
    }
    snprintf_P(svalue, ssvalue, PSTR("{\"Dimmer\":%d}"), sysCfg.led_dimmer[0]);
  }
  else if (!strcmp(type,"LEDTABLE")) {
    if ((data_len > 0) && (payload >= 0) && (payload <= 2)) {
      switch (payload) {
      case 0: // Off
      case 1: // On
        sysCfg.led_table = payload;
        break;
      case 2: // Toggle
        sysCfg.led_table ^= 1;
        break;
      }
      sl_any = 1;
    }
    snprintf_P(svalue, ssvalue, PSTR("{\"LedTable\":\"%s\"}"), (sysCfg.led_table) ? MQTT_STATUS_ON : MQTT_STATUS_OFF);
  }
  else if (!strcmp(type,"FADE")) {
    if ((data_len > 0) && (payload >= 0) && (payload <= 2)) {
      switch (payload) {
      case 0: // Off
      case 1: // On
        sysCfg.led_fade = payload;
        break;
      case 2: // Toggle
        sysCfg.led_fade ^= 1;
        break;
      }
    }
    snprintf_P(svalue, ssvalue, PSTR("{\"Fade\":\"%s\"}"), (sysCfg.led_fade) ? MQTT_STATUS_ON : MQTT_STATUS_OFF);
  }
  else if (!strcmp(type,"SPEED")) {  // 1 - fast, 8 - slow
    if ((data_len > 0) && (payload > 0) && (payload <= 8)) {
      sysCfg.led_speed = payload;
    }
    snprintf_P(svalue, ssvalue, PSTR("{\"Speed\":%d}"), sysCfg.led_speed);
  }
  else if (!strcmp(type,"WAKEUPDURATION")) {
    if ((data_len > 0) && (payload > 0) && (payload < 3601)) {
      sysCfg.led_wakeup = payload;
      sl_wakeupActive = 0;
    }
    snprintf_P(svalue, ssvalue, PSTR("{\"WakeUpDuration\":%d}"), sysCfg.led_wakeup);
  }
  else if (!strcmp(type,"WAKEUP")) {
    do_cmnd_power(index, 1);
    sl_wakeupActive = 1;
    snprintf_P(svalue, ssvalue, PSTR("{\"Wakeup\":\"Started\"}"));
  }
  else {
    serviced = false;  // Unknown command
  }
  return serviced;
}