#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/uart.h"
#include "driver/gpio.h"
#include "sdkconfig.h"
#include "esp_log.h"
#include "app_uart.h"

static const char *TAG = "UART";

void init_uart() {
    uart_config_t uart_config = {
        .baud_rate = UART_BAUD_RATE,
        .data_bits = UART_DATA_8_BITS,
        .parity    = UART_PARITY_DISABLE,
        .stop_bits = UART_STOP_BITS_1,
        .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
        .source_clk = UART_SCLK_DEFAULT,
    };
    int intr_alloc_flags = 0;

#if CONFIG_UART_ISR_IN_IRAM
    intr_alloc_flags = ESP_INTR_FLAG_IRAM;
#endif
    ESP_ERROR_CHECK(uart_driver_install(UART_PORT_NUM, BUF_SIZE * 2, 0 , 0, NULL, intr_alloc_flags));
    ESP_ERROR_CHECK(uart_param_config(UART_PORT_NUM, &uart_config));
    ESP_ERROR_CHECK(uart_set_pin(UART_PORT_NUM, TXD_PIN, RXD_PIN, UART_PIN_NO_CHANGE, UART_PIN_NO_CHANGE));
        ESP_LOGI("UART", "UART initialized");
}

int uart_send_data(const char *data, uint8_t len) {
    return uart_write_bytes(UART_PORT_NUM, data, len);
}

// void uart_receive_data() {
//     uint8_t data[BUF_SIZE];
//     int length = uart_read_bytes(UART_PORT_NUM, data, BUF_SIZE, 20 / portTICK_RATE_MS);
//     if (length > 0) {
//         data[length] = '\0';
//         ESP_LOGI("UART", "Received %d bytes: '%s'", length, (char *)data);
//     }
// }