#include "esp_err.h"
#include "esp_event_base.h"
#include "esp_log.h"
#include "esp_netif_types.h"
#include "esp_wifi.h"
#include "esp_wifi_default.h"

#include "nvs_flash.h"

#include "wifi_private.h"

const char TAG[] = "main";

static int s_retry_num = 0;
static void event_handler(void* arg, esp_event_base_t event_base,
                          int32_t event_id, void* event_data) {
    if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
        esp_wifi_connect();
    } else if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_DISCONNECTED) {
        if (s_retry_num < 5) {
            esp_wifi_connect();
            s_retry_num++;
            ESP_LOGI(TAG, "retry to connect to the AP");
        } else {
            //xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
        }
        ESP_LOGI(TAG,"connect to the AP fail");
    } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
        ip_event_got_ip_t* event = (ip_event_got_ip_t*) event_data;
        ESP_LOGI(TAG, "got ip:" IPSTR, IP2STR(&event->ip_info.ip));
        s_retry_num = 0;
        //xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
    }
}

void app_main(void) {
  esp_err_t ret = nvs_flash_init();
  if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
    ESP_ERROR_CHECK(nvs_flash_erase());
    ret = nvs_flash_init();
  }
  ESP_ERROR_CHECK(ret);

  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();

  ESP_ERROR_CHECK(esp_netif_init());
  ESP_ERROR_CHECK(esp_event_loop_create_default());
  esp_netif_create_default_wifi_sta();

  esp_event_handler_instance_t instance_any_id;
  esp_event_handler_instance_t instance_got_ip;

  ESP_ERROR_CHECK(esp_event_handler_instance_register(
    WIFI_EVENT, ESP_EVENT_ANY_ID, &event_handler, NULL, &instance_any_id));
  ESP_ERROR_CHECK(esp_event_handler_instance_register(
    IP_EVENT, IP_EVENT_STA_GOT_IP, &event_handler, NULL, &instance_got_ip));

  ESP_ERROR_CHECK(esp_wifi_init(&cfg));
  ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));

  wifi_config_t wifi_config = {
    .sta = {
      .ssid = WIFI_SSID,
      .password = WIFI_PASS,
      .threshold.authmode = WIFI_AUTH_WPA_WPA2_PSK,
    },
  };

  ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_STA, &wifi_config));
  ESP_ERROR_CHECK(esp_wifi_start());
}