#include "wifi_init.h"

#include "esp_wifi.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "esp_netif.h"

#include "device_config.h"

static const char *TAG = "WIFI_INIT";

static void wifi_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) {
        ESP_LOGW(TAG, "Disconnected, retrying...");
        esp_wifi_connect();
    } else if (event_base == IP_EVENT &&
               event_id == IP_EVENT_STA_GOT_IP) {
        ESP_LOGI(TAG, "Got IP address");
    }
}

void wifi_init(void)
{
    esp_err_t ret = nvs_flash_init();
    if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
        ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
        /* NVS partition was truncated, erase and retry */
        ESP_ERROR_CHECK(nvs_flash_erase());
        ret = nvs_flash_init();
    }
    ESP_ERROR_CHECK(ret);

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

    esp_netif_t *sta_netif = esp_netif_create_default_wifi_sta();
    (void)sta_netif;

    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));

    ESP_ERROR_CHECK(esp_event_handler_instance_register(
        WIFI_EVENT,
        ESP_EVENT_ANY_ID,
        &wifi_event_handler,
        NULL,
        NULL
    ));
    ESP_ERROR_CHECK(esp_event_handler_instance_register(
        IP_EVENT,
        IP_EVENT_STA_GOT_IP,
        &wifi_event_handler,
        NULL,
        NULL
    ));

    wifi_config_t wifi_config = { 0 };
    snprintf((char *)wifi_config.sta.ssid,
             sizeof(wifi_config.sta.ssid),
             "%s", WIFI_SSID);
    snprintf((char *)wifi_config.sta.password,
             sizeof(wifi_config.sta.password),
             "%s", WIFI_PASS);

    wifi_config.sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;

    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
    ESP_ERROR_CHECK(
        esp_wifi_set_config(WIFI_IF_STA, &wifi_config)
    );
    ESP_ERROR_CHECK(esp_wifi_start());

    ESP_LOGI(TAG, "Wi-Fi STA init done, connecting to SSID: %s", WIFI_SSID);
}