#include <Arduino.h>
#include "driver/ledc.h"

#define pwmChannel 0

#define LedGChannel 1
#define LedRChannel 2
#define LedYChannel 3

#define pinBtnB3 2
#define pinBtnB4 4

#define pinLED1 34
#define pinLED2 33
#define pinLED3 25

#define freqPWM 5000 
#define freqPWM1 1000 
#define freqPWM2 500

#define resolution 8

volatile bool btnB3Pressed = false;
volatile bool btnB4Pressed = false;
volatile unsigned long lastDebounceTimeB3 = 0;
volatile unsigned long lastDebounceTimeB4 = 0;
unsigned long debounceDelay = 50;

int currentLED = 1;
int brightness = 0;

void IRAM_ATTR ISR_btn3() {
  if ((millis() - lastDebounceTimeB3) > debounceDelay) {
    btnB3Pressed = true;
  }
  lastDebounceTimeB3 = millis();
}

void IRAM_ATTR ISR_btn4() {
  if ((millis() - lastDebounceTimeB4) > debounceDelay) {
    btnB4Pressed = true;
  }
  lastDebounceTimeB4 = millis();
}

ledc_channel_config_t channel_configs[3]; // Configuraciones PWM para 3 LEDs

void setup() {
  pinMode(pinBtnB3, INPUT_PULLUP);
  pinMode(pinBtnB4, INPUT_PULLUP);
  pinMode(pinLED1, OUTPUT);
  pinMode(pinLED2, OUTPUT);
  pinMode(pinLED3, OUTPUT);

  // Configuración PWM para los tres LEDs
  channel_configs[1].gpio_num = pinLED1;
  channel_configs[2].gpio_num = pinLED2;
  channel_configs[3].gpio_num = pinLED3;
  for (int i = 0; i < 3; i++) {
    channel_configs[i].speed_mode = LEDC_HIGH_SPEED_MODE;
    channel_configs[i].channel = static_cast<ledc_channel_t>(i);
    channel_configs[i].intr_type = LEDC_INTR_DISABLE;
    channel_configs[i].timer_sel = LEDC_TIMER_0;
    channel_configs[i].duty = 0; // Inicialmente apagado
    ledc_channel_config(&channel_configs[i]);
  }

  // Configuración del timer PWM
  ledc_timer_config_t timer_config;
  timer_config.speed_mode = LEDC_HIGH_SPEED_MODE;
  timer_config.duty_resolution = LEDC_TIMER_8_BIT; // Reducimos la resolución para ajustar el brillo en un rango de 0 a 255
  timer_config.timer_num = LEDC_TIMER_0;
  timer_config.freq_hz = freqPWM; // Frecuencia de PWM
  ledc_timer_config(&timer_config);

  attachInterrupt(digitalPinToInterrupt(pinBtnB3), ISR_btn3, FALLING);
  attachInterrupt(digitalPinToInterrupt(pinBtnB4), ISR_btn4, FALLING);
}

void loop() {
  if (btnB3Pressed) {
    // Cambiar el LED seleccionado
    currentLED = (currentLED % 3) + 1; 
    btnB3Pressed = false; 
  }

  if (btnB4Pressed) {
    // Ajustar el brillo del LED seleccionado
    if (brightness < 255) {
      brightness += 25; 
    } else {
      brightness = 0; 
    }
    btnB4Pressed = false; 
  }

  // Actualizar el brillo del LED seleccionado
  ledc_set_duty(LEDC_HIGH_SPEED_MODE, static_cast<ledc_channel_t>(currentLED - 1), brightness);
  ledc_update_duty(LEDC_HIGH_SPEED_MODE, static_cast<ledc_channel_t>(currentLED - 1));
  delay(100); // Pequeño retardo para evitar lecturas erráticas del botón
}