#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#define BTN_SELECT  14  // Botón para elegir estudiante
#define BTN_RESET   27  // Botón para reiniciar la lista

LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);

const char* students[] = {"Randy","Mel","Andy","Andres"};
const int totalStudents = sizeof(students) / sizeof(students[0]);
bool selectedStudents[totalStudents] = {false}; // Para controlar los que ya salieron

int remaining = totalStudents; // Cantidad de estudiantes restantes

void setup() {
    Serial.begin(115200);
    LCD.init();
    LCD.backlight();

    pinMode(BTN_SELECT, INPUT_PULLUP);
    pinMode(BTN_RESET, INPUT_PULLUP);

    LCD.setCursor(0, 0);
    LCD.print("Presiona boton");
    LCD.setCursor(0, 1);
    LCD.print("para elegir");
}

void loop() {
    if (digitalRead(BTN_SELECT) == LOW) {
        selectStudent();
        delay(300); // Antirrebote
    }

    if (digitalRead(BTN_RESET) == LOW) {
        resetSelection();
        delay(300);
    }
}

void selectStudent() {
    if (remaining == 0) {
        LCD.clear();
        LCD.setCursor(0, 0);
        LCD.print("Todos elegidos!");
        return;
    }

    int index;
    do {
        index = random(totalStudents);
    } while (selectedStudents[index]);

    selectedStudents[index] = true;
    remaining--;

    LCD.clear();
    LCD.setCursor(0, 0);
    LCD.print("Seleccionado:");
    LCD.setCursor(0, 1);
    LCD.print(students[index]);

    Serial.println("Elegido: " + String(students[index]));
}

void resetSelection() {
    for (int i = 0; i < totalStudents; i++) {
        selectedStudents[i] = false;
    }
    remaining = totalStudents;

    LCD.clear();
    LCD.setCursor(0, 0);
    LCD.print("Lista Reiniciada");
    LCD.setCursor(0, 1);
    LCD.print("Presiona boton");

    Serial.println("Lista reiniciada");
}