/*
  xdrv_52_3_berry_native.ino - Berry scripting language, native fucnctions

  Copyright (C) 2021 Stephan Hadinger, Berry language by Guan Wenliang https://github.com/Skiars/berry

  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_BERRY

#include <berry.h>
#include "esp8266toEsp32.h"

#if defined(CONFIG_IDF_TARGET_ESP32) || defined(CONFIG_IDF_TARGET_ESP32S2)
#include <driver/dac.h>
#endif
/*********************************************************************************************\
 * Native functions mapped to Berry functions
 * 
 * import gpio
 * 
 * 
\*********************************************************************************************/
extern "C" {

  #include "berry/include/be_gpio_defines.h"

  // virtual member
  int gp_member(bvm *vm);
  int gp_member(bvm *vm) {
    if (be_const_module_member(vm, lv_gpio_constants, lv_gpio_constants_size)) {
      be_return(vm);
    } else {
      be_return_nil(vm);
    }
  }

  int gp_pin_mode(bvm *vm);
  int gp_pin_mode(bvm *vm) {
    int32_t argc = be_top(vm); // Get the number of arguments
    if (argc == 2 && be_isint(vm, 1) && be_isint(vm, 2)) {
      int32_t pin = be_toint(vm, 1);
      int32_t mode = be_toint(vm, 2);
      if (pin >= 0) {
        if (mode > 0) {
          // standard ESP mode
          pinMode(pin, mode);
        } else {
          // synthetic mode
          if (-1 == mode) {
            // DAC
#if   defined(CONFIG_IDF_TARGET_ESP32)
            if (25 == pin || 26 == pin) {
              dac_channel_t channel = (25 == pin) ? DAC_CHANNEL_1 : DAC_CHANNEL_2;
              esp_err_t err = dac_output_enable(channel);
              if (err) {
                be_raisef(vm, "value_error", "Error: dac_output_enable(%i) -> %i", channel, err);
              }
            } else {
              be_raise(vm, "value_error", "DAC only supported on GPIO25-26");
            }
#elif defined(CONFIG_IDF_TARGET_ESP32S2)
            if (17 == pin || 18 == pin) {
              dac_channel_t channel = (17 == pin) ? DAC_CHANNEL_1 : DAC_CHANNEL_2;
              esp_err_t err = dac_output_enable(channel);
              if (err) {
                be_raisef(vm, "value_error", "Error: dac_output_enable(%i) -> %i", channel, err);
              }
            } else {
              be_raise(vm, "value_error", "DAC only supported on GPIO17-18");
            }
#else
            be_raise(vm, "value_error", "DAC unsupported in this chip");
#endif
          }
        }
      }
      be_return_nil(vm);
    }
    be_raise(vm, kTypeError, nullptr);
  }

  int gp_digital_write(bvm *vm);
  int gp_digital_write(bvm *vm) {
    int32_t argc = be_top(vm); // Get the number of arguments
    if (argc == 2 && be_isint(vm, 1) && be_isint(vm, 2)) {
      int32_t pin = be_toint(vm, 1);
      int32_t val = be_toint(vm, 2);
      if (pin >= 0) {
        digitalWrite(pin, val);
      }
      be_return_nil(vm);
    }
    be_raise(vm, kTypeError, nullptr);
  }
  
  int gp_digital_read(bvm *vm);
  int gp_digital_read(bvm *vm)  {
    int32_t argc = be_top(vm); // Get the number of arguments
    if (argc == 1 && be_isint(vm, 1)) {
      int32_t pin = be_toint(vm, 1);
      if (pin >= 0) {
        int32_t ret = digitalRead(pin);
        be_pushint(vm, ret);
      } else {
        be_pushnil(vm);
      }
      be_return(vm);
    }
    be_raise(vm, kTypeError, nullptr);
  }

  int gp_dac_voltage(bvm *vm);
  int gp_dac_voltage(bvm *vm) {
    int32_t argc = be_top(vm); // Get the number of arguments
    if (argc == 2 && be_isint(vm, 1) && be_isint(vm, 2)) {
      int32_t pin = be_toint(vm, 1);
      int32_t mV = be_toint(vm, 2);
      if (mV < 0) { mV = 0; }
      uint32_t dac_value = changeUIntScale(mV, 0, 3300, 0, 255);    // convert from 0..3300 ms to 0..255
#if   defined(CONFIG_IDF_TARGET_ESP32)
      if (25 == pin || 26 == pin) {
        dac_channel_t channel = (25 == pin) ? DAC_CHANNEL_1 : DAC_CHANNEL_2;
        esp_err_t err = dac_output_voltage(channel, dac_value);
        if (err) {
          be_raisef(vm, "internal_error", "Error: esp_err_tdac_output_voltage(%i, %i) -> %i", channel, dac_value, err);
        }
      } else {
        be_raise(vm, "value_error", "DAC only supported on GPIO25-26");
      }
#elif defined(CONFIG_IDF_TARGET_ESP32S2)
      if (17 == pin || 18 == pin) {
        dac_channel_t channel = (17 == pin) ? DAC_CHANNEL_1 : DAC_CHANNEL_2;
        esp_err_t err = dac_output_voltage(channel, dac_value);
        if (err) {
          be_raisef(vm, "internal_error", "Error: esp_err_tdac_output_voltage(%i, %i) -> %i", channel, dac_value, err);
        }
      } else {
        be_raise(vm, "value_error", "DAC only supported on GPIO17-18");
      }
#elif defined(CONFIG_IDF_TARGET_ESP32C3)
      be_raise(vm, "value_error", "DAC unsupported in this chip");
#else
      be_raise(vm, "value_error", "DAC unsupported in this chip");
#endif
      be_pushint(vm, changeUIntScale(dac_value, 0, 255, 0, 3300));
      be_return(vm);
    }
    be_raise(vm, kTypeError, nullptr);
  }

// Tasmota specific

  int gp_pin_used(bvm *vm);
  int gp_pin_used(bvm *vm) {
    int32_t argc = be_top(vm); // Get the number of arguments
    if (argc >= 1 && argc <= 2 && be_isint(vm, 1)) {
      int32_t pin = be_toint(vm, 1);
      int32_t index = 0;
      if (argc == 2 && be_isint(vm, 2)) {
        index = be_toint(vm, 2);
      }
      bool ret;
      if (pin == GPIO_OPTION_A) {
        ret = bitRead(TasmotaGlobal.gpio_optiona.data, index);
      } else  {
        ret = PinUsed(pin, index);
      }
      be_pushbool(vm, ret);
      be_return(vm);
    }
    be_raise(vm, kTypeError, nullptr);
  }

  int gp_pin(bvm *vm);
  int gp_pin(bvm *vm) {
    int32_t argc = be_top(vm); // Get the number of arguments
    if (argc >= 1 && argc <= 2 && be_isint(vm, 1)) {
      int32_t pin = be_toint(vm, 1);
      int32_t index = 0;
      if (argc == 2 && be_isint(vm, 2)) {
        index = be_toint(vm, 2);
      }
      int32_t ret = Pin(pin, index);
      be_pushint(vm, ret);
      be_return(vm);
    }
    be_raise(vm, kTypeError, nullptr);
  }

  void gp_set_duty(int32_t pin, int32_t duty, int32_t hpoint) {
    analogWritePhase(pin, duty, hpoint);
  }

}

#endif  // USE_BERRY