#include <stdio.h>
#include <stdbool.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "esp_timer.h"

/* ===================== GPIO CONFIG ===================== */
#define LED_RED_PIN     GPIO_NUM_16
#define LED_GREEN_PIN   GPIO_NUM_17
#define LED_BLUE_PIN    GPIO_NUM_18

/* ===================== ENUM MODE ===================== */
typedef enum {
    LED_MODE_BLINK = 0
} led_mode_t;

/* ===================== STRUCT LED ===================== */
typedef struct {
    const char *name;
    gpio_num_t pin;
    bool active_high;
    float frequency;
    led_mode_t mode;
} led_t;

/* ===================== GLOBAL LED ===================== */
static led_t led_red;
static led_t led_green;
static led_t led_blue;

/* ===================== LED TASK ===================== */
static void led_task(void *param)
{
    led_t *led = (led_t *)param;
    uint32_t delay_ms = (uint32_t)(500.0 / led->frequency);

    while (1) {
        int64_t time_ms = esp_timer_get_time() / 1000;

        gpio_set_level(led->pin, led->active_high);
        printf("[%lld ms] [%s] ON  | GPIO %d = %d\n",
               time_ms, led->name, led->pin, led->active_high);
        fflush(stdout);
        vTaskDelay(pdMS_TO_TICKS(delay_ms));

        time_ms = esp_timer_get_time() / 1000;
        gpio_set_level(led->pin, !led->active_high);
        printf("[%lld ms] [%s] OFF | GPIO %d = %d\n",
               time_ms, led->name, led->pin, !led->active_high);
        fflush(stdout);
        vTaskDelay(pdMS_TO_TICKS(delay_ms));
    }
}

/* ===================== INIT LED ===================== */
static void led_init(led_t *led)
{
    gpio_config_t io_conf = {
        .pin_bit_mask = (1ULL << led->pin),
        .mode = GPIO_MODE_OUTPUT
    };
    gpio_config(&io_conf);
}

/* ===================== MAIN ===================== */
void app_main(void)
{
    led_red = (led_t){
        .name = "RED",
        .pin = LED_RED_PIN,
        .active_high = true,
        .frequency = 10.0
    };

    led_green = (led_t){
        .name = "GREEN",
        .pin = LED_GREEN_PIN,
        .active_high = true,
        .frequency = 5.0
    };

    led_blue = (led_t){
        .name = "BLUE",
        .pin = LED_BLUE_PIN,
        .active_high = true,
        .frequency = 2.0
    };

    led_init(&led_red);
    led_init(&led_green);
    led_init(&led_blue);

    xTaskCreate(led_task, "LED_RED",   2048, &led_red,   1, NULL);
    xTaskCreate(led_task, "LED_GREEN", 2048, &led_green, 1, NULL);
    xTaskCreate(led_task, "LED_BLUE",  2048, &led_blue,  1, NULL);
}