#include <stdio.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>
#include <esp_system.h>
#include <esp_timer.h>
#include <esp_log.h>

#include "nvs_flash.h"
#include "esp_http_server.h"
#include "i2cdev.h"

#include "ygg_http_server.h"
#include "ygg_http_routes.h"
#include "ygg_wifi.h"
#include "ygg_http_server.h"
#include "ygg_bmp280.h"
#include "ygg_http_req.h"
#include "ygg_state.h"
#include "ygg_sh1106.h"
#include "ygg_lock.h"
#include "lvgl.h"


static const char *TAG = "thermo_sensor";
static lv_display_t *sh_display = NULL;
static lv_obj_t *label = NULL;
bmp280_t dev_bmp_280;

void lvgl_task(void *pvParameters) {
    while (1) {
        if (ygg_lvgl_lock_take(pdMS_TO_TICKS(100))) {
            lv_timer_handler();
            ygg_lvgl_lock_give();
        }
        vTaskDelay(pdMS_TO_TICKS(10));
    }
}

void sensor_task(void *pvParameters) {
    // Wait 1s, to avoid corrupted first sensor readout
    vTaskDelay(pdMS_TO_TICKS(1000));
    while (1) {
        esp_err_t err = ygg_bmp280_read_sensor(&dev_bmp_280);
        // Najpierw OLED, potem (blokujący) HTTP — żeby ekran
        // odświeżył się nawet gdy serwer nie odpowiada.
        // ygg_bmp280_read_sensor() aktualizuje CURR_READOUT TYLKO przy
        // sukcesie, więc przy błędzie pokazujemy ostatnie dobre + ERR
        // i NIE wysyłamy śmieci do bazy.
        char buf[256];
        if (err == ESP_OK) {
            snprintf(buf, sizeof(buf), "Temp: %.1f C\nHumid: %.1f %%\nPress: %.1f hPa",
                     CURR_READOUT.temperature,
                     CURR_READOUT.humidity,
                     CURR_READOUT.pressure / 100.);
            ygg_set_display_label(sh_display, label, buf);
            ygg_send_sensor_readouts(BASE_URL,
                                     SENSOR_NAME,
                                     CURR_READOUT);
        } else {
            snprintf(buf, sizeof(buf), "SENSOR ERR\nTemp: %.1f C\nHumid: %.1f %%\nPress: %.1f hPa",
                     CURR_READOUT.temperature,
                     CURR_READOUT.humidity,
                     CURR_READOUT.pressure / 100.);
            ygg_set_display_label(sh_display, label, buf);
            ESP_LOGW(TAG, "skipping HTTP POST, keeping last good readout");
        }
        vTaskDelay(pdMS_TO_TICKS(60 * 1000));
    }
}

void app_main()
{
    // NVS -  Non-Volatile Storage, this memory stays untouched
    // after power off. It is key value memory stored
    // in separate partition of flash. It takes about 20kB.
    // Here it is not used directly. It is required by WiFi
    // driver to store SSID and password.
    // NVS is organized into pages. Single page is one flash
    // sector - typically 4096B
    esp_err_t ret = nvs_flash_init();

    if (ret == ESP_ERR_NVS_NO_FREE_PAGES || 
        ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
        // ESP_ERR_NVS_NEW_VERSION_FOUND - NVS header page is
        // stored in newer version (newer IDF) than version
        // it is used by this application
        ESP_ERROR_CHECK(nvs_flash_erase());
        ESP_ERROR_CHECK(nvs_flash_init());
    }

    ygg_wifi_init_sta();

    httpd_handle_t server = ygg_start_webserver();
    httpd_register_uri_handler(server, &ygg_temp_uri);
    httpd_register_uri_handler(server, &ygg_press_uri);
    httpd_register_uri_handler(server, &ygg_hum_uri);

    // Jedna centralna inicjalizacja: mutexy + magistrala I2C.
    // Wcześniej i2cdev_init() był wołany w obu ygg_*_init() + bus był
    // tworzony przez dummy-device OLED, co mieszało.
    ygg_lock_init();
    ESP_ERROR_CHECK(i2cdev_init());

    sh_display = ygg_sh1106_init();

    lv_obj_t *scr = lv_display_get_screen_active(sh_display);
    label = lv_label_create(scr);
    ygg_set_display_label(sh_display, label, "PLEASE WAIT...");

    ygg_bmp280_init(&dev_bmp_280);

    xTaskCreatePinnedToCore(lvgl_task, "lvgl", 4096, NULL, 4, NULL, APP_CPU_NUM);
    xTaskCreatePinnedToCore(sensor_task, "bmp280_test", 8192, NULL, 5, NULL, APP_CPU_NUM);
}