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

#include "nvs_flash.h"
#include "esp_http_server.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 "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;

static void lvgl_tick_cb(void *arg) {
    lv_tick_inc(10);
}

void lvgl_task(void *pvParameters) {
    while (1) {
        lv_timer_handler();
        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) {
        ygg_bmp280_read_sensor(&dev_bmp_280);
        // Najpierw OLED, potem (blokujący) HTTP — żeby ekran
        // odświeżył się nawet gdy serwer nie odpowiada.
        char buf[32];
        snprintf(buf, sizeof(buf), "Temp: %.2f C",
                 CURR_READOUT.temperature);
        ygg_set_display_label(sh_display, label, buf);
        ygg_send_sensor_readouts(BASE_URL,
                                 SENSOR_NAME,
                                 CURR_READOUT);
        vTaskDelay(pdMS_TO_TICKS(10000));
    }
}

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);

    ESP_ERROR_CHECK(i2cdev_init());
    
    sh_display = ygg_sh1106_init();
    // LVGL potrzebuje regularnego ticka, inaczej redraw nigdy się nie wykona
    // (to był powód, dla którego wisiało "FIRST").
    const esp_timer_create_args_t lvgl_tick_args = {
        .callback = lvgl_tick_cb,
        .name = "lvgl_tick",
    };
    esp_timer_handle_t lvgl_tick_handle = NULL;
    ESP_ERROR_CHECK(esp_timer_create(&lvgl_tick_args, &lvgl_tick_handle));
    ESP_ERROR_CHECK(esp_timer_start_periodic(lvgl_tick_handle, 10 * 1000));

    lv_obj_t *scr = lv_display_get_screen_active(sh_display);
    label = lv_label_create(scr);
    ygg_set_display_label(sh_display, label, "FIRST");

    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);
}