#include <stdio.h>
#include "pico/stdlib.h"
#include "hardware/uart.h"

// Define the UART0 TX and RX pins
#define UART0_TX_PIN 0  // GPIO0 is UART0 TX
#define UART0_RX_PIN 1  // GPIO1 is UART0 RX
#define UART1_TX_PIN 4  // GPIO4 is UART1 TX
#define UART1_RX_PIN 5  // GPIO5 is UART1 RX
#define BAUD_RATE 115200  // Standard baud rate for serial communication

int main() {
  // Initialize stdio for debugging over USB
  stdio_init_all();

  // Print a message to the USB console
  printf("Iniciando comunicação UART...\n");

  // Initialize UART0 and UART1 with the desired baud rate
  uart_init(uart0, BAUD_RATE);
  uart_init(uart1, BAUD_RATE);

  // Configure GPIO pins for UART communication
  gpio_set_function(UART0_TX_PIN, GPIO_FUNC_UART);
  gpio_set_function(UART0_RX_PIN, GPIO_FUNC_UART);
  gpio_set_function(UART1_TX_PIN, GPIO_FUNC_UART);
  gpio_set_function(UART1_RX_PIN, GPIO_FUNC_UART);

  // Buffers to store the name entered and the received name
  char name[80];
  char name_received[80];

  while (true) {

    // Prompt the user to enter their name
    printf("\nDigite o seu nome: ");

    // Read the name from the terminal
    if (scanf("%79s", name) == 1) { // Limiting input to avoid buffer overflow
      // Send the name via UART1
      uart_puts(uart1, name);
    } else {
      printf("Erro ao ler o nome.\n"); // Handle input errors
    }

    // Wait a moment to ensure the name is sent properly
    sleep_ms(200);  

    // Wait for data to be received via UART1
    int i = 0;
    while (uart_is_readable(uart1)) { // Check if data is available to read
      char c = uart_getc(uart1);  // Receive one character at a time
      if (c == '\n') break;  // Stop reading on newline
      name_received[i++] = c;   // Store the received character in buffer
    }

    name_received[i] = '\0'; // Null-terminate the string

    // Print the received name if we got any data
    if (i > 0) {
      printf("\nRecebido pela UART1: %s\n", name_received);
      printf("------------------------------\n");
    }

    sleep_ms(500);
  }

  return 0;
}