#include <Arduino_FreeRTOS.h>
#include <LiquidCrystal_I2C.h>

// Configuración de pines
const int buzzerPin = 7;
const int switchPin = 8;

const int notes[] = {262, 294, 330, 349, 392, 440, 494}; // Do, Re, Mi, Fa, Sol, La, Si
const char* noteNames[] = {"Do", "Re", "Mi", "Fa", "Sol", "La", "Si"};
const int numNotes = 7;

LiquidCrystal_I2C lcd(0x27, 16, 2);

static void Task_1(void* pvParameters);
static void Task_2(void* pvParameters);

void setup() {
    pinMode(switchPin, INPUT);
    pinMode(buzzerPin, OUTPUT);
    
    lcd.init();
    lcd.backlight();
    
    xTaskCreate(
        Task_1,           // Función de la tarea
        "Task no. 1",    // Nombre de la tarea
        128,              // Stack size
        NULL,             // Parámetros
        1,               // Prioridad
        NULL             // Handle
    );
    
    xTaskCreate(
        Task_2,           // Función de la tarea
        "Task no. 2",    // Nombre de la tarea
        128,              // Stack size
        NULL,             // Parámetros
        2,               // Prioridad
        NULL             // Handle
    );
}

static void Task_1(void* pvParameters) {
    while (1) {
        if (digitalRead(switchPin) == HIGH) {
            for (int i = 0; i < numNotes; i++) {
                lcd.clear();
                lcd.setCursor(0, 0);
                lcd.print(noteNames[i]);
                vTaskDelay(pdMS_TO_TICKS(1000));
            }
        } else {
            for (int i = numNotes - 1; i >= 0; i--) {
                lcd.clear();
                lcd.setCursor(0, 0);
                lcd.print(noteNames[i]);
                vTaskDelay(pdMS_TO_TICKS(1000));
            }
        }
    }
}

static void Task_2(void* pvParameters) {
    while (1) {
        if (digitalRead(switchPin) == HIGH) {
            for (int i = 0; i < numNotes; i++) {
                tone(buzzerPin, notes[i], 500);
                vTaskDelay(pdMS_TO_TICKS(1000));
            }
        } else {
            for (int i = numNotes - 1; i >= 0; i--) {
                tone(buzzerPin, notes[i], 500);
                vTaskDelay(pdMS_TO_TICKS(1000));
            }
        }
    }
}

void loop() {
    // Vacío porque usamos FreeRTOS
}