#include "status_led.h"
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "led_strip.h"
#include "esp_log.h"

static const char *TAG = "status_led";

static led_strip_handle_t s_led_strip = NULL;
static bool s_is_rgb = false;
static int s_gpio_pin = -1;
static volatile led_state_t s_current_state = LED_STATE_NO_CONFIG;

static void set_color(uint8_t r, uint8_t g, uint8_t b) {
    if (s_is_rgb && s_led_strip) {
        led_strip_set_pixel(s_led_strip, 0, r, g, b);
        led_strip_refresh(s_led_strip);
    } else if (!s_is_rgb && s_gpio_pin >= 0) {
        // Simple LED: On if any color component is > 0
        gpio_set_level(s_gpio_pin, (r+g+b) > 0);
    }
}

static void led_task(void *arg) {
    int toggle = 0;
    while (1) {
        switch (s_current_state) {
            case LED_STATE_NO_CONFIG: // Yellow (Solid for RGB, Blink for Single)
                if (s_is_rgb) { set_color(20, 20, 0); vTaskDelay(pdMS_TO_TICKS(1000)); }
                else { set_color(1,1,1); vTaskDelay(pdMS_TO_TICKS(100)); set_color(0,0,0); vTaskDelay(pdMS_TO_TICKS(100)); }
                break;
            case LED_STATE_WAITING: // Blue Blink (Searching)
                set_color(0, 0, toggle ? 50 : 0);
                toggle = !toggle;
                vTaskDelay(pdMS_TO_TICKS(500));
                break;
            case LED_STATE_CONNECTED: // Green Solid (Idle)
                set_color(0, 20, 0);
                vTaskDelay(pdMS_TO_TICKS(1000));
                break;
            case LED_STATE_MONITORING: // Blue Solid (Sniffer Mode)
                set_color(0, 0, 50);
                vTaskDelay(pdMS_TO_TICKS(1000));
                break;
            case LED_STATE_TRANSMITTING: // Fast Purple Flash (Busy)
                set_color(toggle ? 50 : 0, 0, toggle ? 50 : 0);
                toggle = !toggle;
                vTaskDelay(pdMS_TO_TICKS(50));
                break;
            case LED_STATE_TRANSMITTING_SLOW: // Slow Purple Pulse (Pacing)
                set_color(toggle ? 50 : 0, 0, toggle ? 50 : 0);
                toggle = !toggle;
                vTaskDelay(pdMS_TO_TICKS(250));
                break;
            case LED_STATE_STALLED: // Purple Solid (Stalled)
                set_color(50, 0, 50);
                vTaskDelay(pdMS_TO_TICKS(1000));
                break;
            case LED_STATE_FAILED: // Red Blink (Error)
                set_color(toggle ? 50 : 0, 0, 0);
                toggle = !toggle;
                vTaskDelay(pdMS_TO_TICKS(200));
                break;
        }
    }
}

void status_led_init(int gpio_pin, bool is_rgb_strip) {
    s_gpio_pin = gpio_pin;
    s_is_rgb = is_rgb_strip;

    ESP_LOGI(TAG, "Initializing LED on GPIO %d (RGB=%d)", gpio_pin, is_rgb_strip);

    if (s_is_rgb) {
        led_strip_config_t s_cfg = {
            .strip_gpio_num = gpio_pin,
            .max_leds = 1,
            .led_pixel_format = LED_PIXEL_FORMAT_GRB, // Standard for WS2812
            .led_model = LED_MODEL_WS2812,           // Specific model
            .flags.invert_out = false,
        };
        led_strip_rmt_config_t r_cfg = {
            .resolution_hz = 10 * 1000 * 1000, // 10MHz
            .flags.with_dma = false,
        };

        esp_err_t ret = led_strip_new_rmt_device(&s_cfg, &r_cfg, &s_led_strip);
        if (ret != ESP_OK) {
            ESP_LOGE(TAG, "Failed to create RMT LED strip: %s", esp_err_to_name(ret));
            return;
        }
        led_strip_clear(s_led_strip);
    } else {
        gpio_reset_pin(gpio_pin);
        gpio_set_direction(gpio_pin, GPIO_MODE_OUTPUT);
        gpio_set_level(gpio_pin, 0);
    }

    xTaskCreate(led_task, "led_task", 2048, NULL, 5, NULL);
}

void status_led_set_state(led_state_t state) {
    s_current_state = state;
}

led_state_t status_led_get_state(void) {
    return s_current_state;
}