#include "wifi.h"
#include "esp_wifi.h"
#include "esp_log.h"
#include "esp_lvgl_port.h"

/* FreeRTOS event group to signal when we are connected*/
static EventGroupHandle_t s_wifi_event_group;

/* The event group allows multiple bits for each event, but we only care about two events:
 * - we are connected to the AP with an IP
 * - we failed to connect after the maximum amount of retries */
#define WIFI_CONNECTED_BIT BIT0
#define WIFI_FAIL_BIT BIT1

#define EXAMPLE_ESP_WIFI_SSID "wifimms3"
#define EXAMPLE_ESP_WIFI_PASS "mmswifi0611"
#define EXAMPLE_ESP_MAXIMUM_RETRY 5

#define ESP_WIFI_SAE_MODE WPA3_SAE_PWE_BOTH
#define EXAMPLE_H2E_IDENTIFIER CONFIG_ESP_WIFI_PW_ID
#define ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD WIFI_AUTH_WPA2_PSK

static const char *TAG = "wifi";

static int s_retry_num = 0;

static lv_subject_t wifiStatus;
LV_IMAGE_DECLARE(wifi_ok);
LV_IMAGE_DECLARE(wifi_ko);

static void wifiStatus_obs_cb(lv_observer_t * observer, lv_subject_t * subject);


static void wifiStatus_obs_cb(lv_observer_t * observer, lv_subject_t * subject)
{
    ESP_LOGE(TAG, "On passe dans le callback de chgt de statut; %li", lv_subject_get_int(subject));
    lv_obj_t * wifiSt = lv_obj_get_child(lv_obj_get_child(lv_layer_top(), 0),2);
    if(lv_obj_check_type(wifiSt, &lv_image_class)){
        switch (lv_subject_get_int(subject))
        {
        case 0:
            lv_image_set_src(wifiSt,&wifi_ko);
            break;
        case 1:
            lv_image_set_src(wifiSt,&wifi_ok);
            break;
        default:
            break;
        }
    }else{
        ESP_LOGE(TAG, "L'objet recuip en semble pas etre du bon type");
    }
    //int32_t prev_v = lv_subject_get_previous_int(subject);
    //int32_t cur_v = lv_subject_get_int(subject);

    //lv_obj_t * btn = lv_observer_get_target(observer);
}

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)
    {
        if(lvgl_port_lock(0)){
            ESP_LOGE(TAG,"Statut Wifi 0");
            lv_subject_set_int(&wifiStatus,0);
            lvgl_port_unlock();
        }
        if (s_retry_num < EXAMPLE_ESP_MAXIMUM_RETRY)
        {
            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)
    {
        if(lvgl_port_lock(0)){
            ESP_LOGE(TAG,"Statut Wifi 1");
            lv_subject_set_int(&wifiStatus,1);
            lvgl_port_unlock();
        }
        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 wifi_init_sta(void)
{
    s_wifi_event_group = xEventGroupCreate();

    ESP_ERROR_CHECK(esp_netif_init());

    ESP_ERROR_CHECK(esp_event_loop_create_default());
    esp_netif_create_default_wifi_sta();

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

    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,
                                                        &wifi_event_handler,
                                                        NULL,
                                                        &instance_any_id));
    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT,
                                                        IP_EVENT_STA_GOT_IP,
                                                        &wifi_event_handler,
                                                        NULL,
                                                        &instance_got_ip));

    wifi_config_t wifi_config = {
        .sta = {
            .ssid = EXAMPLE_ESP_WIFI_SSID,
            .password = EXAMPLE_ESP_WIFI_PASS,
            /* Authmode threshold resets to WPA2 as default if password matches WPA2 standards (pasword len => 8).
             * If you want to connect the device to deprecated WEP/WPA networks, Please set the threshold value
             * to WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK and set the password with length and format matching to
             * WIFI_AUTH_WEP/WIFI_AUTH_WPA_PSK standards.
             */
            .threshold.authmode = ESP_WIFI_SCAN_AUTH_MODE_THRESHOLD,
            .sae_pwe_h2e = ESP_WIFI_SAE_MODE,
            .sae_h2e_identifier = EXAMPLE_H2E_IDENTIFIER,
        },
    };
    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, "wifi_init_sta finished.");
    lv_subject_init_int(&wifiStatus,0);
    lv_subject_add_observer_obj(&wifiStatus, wifiStatus_obs_cb, NULL, NULL);


    /* Waiting until either the connection is established (WIFI_CONNECTED_BIT) or connection failed for the maximum
     * number of re-tries (WIFI_FAIL_BIT). The bits are set by event_handler() (see above) */
    EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
                                           WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
                                           pdFALSE,
                                           pdFALSE,
                                           portMAX_DELAY);

    /* xEventGroupWaitBits() returns the bits before the call returned, hence we can test which event actually
     * happened. */
    if (bits & WIFI_CONNECTED_BIT)
    {
        ESP_LOGI(TAG, "connected to ap SSID:%s", EXAMPLE_ESP_WIFI_SSID);
        if(lvgl_port_lock(0)){
            ESP_LOGE(TAG,"Statut Wifi 1");
            lv_subject_set_int(&wifiStatus,1);
            lvgl_port_unlock();
        }
    }
    else if (bits & WIFI_FAIL_BIT)
    {
        ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s",
                 EXAMPLE_ESP_WIFI_SSID, EXAMPLE_ESP_WIFI_PASS);
        if(lvgl_port_lock(0)){
            ESP_LOGE(TAG,"Statut Wifi 0");
            lv_subject_set_int(&wifiStatus,0);
            lvgl_port_unlock();
        }
    }
    else
    {
        ESP_LOGE(TAG, "UNEXPECTED EVENT");
        if(lvgl_port_lock(0)){
            ESP_LOGE(TAG,"Statut Wifi 0");
            lv_subject_set_int(&wifiStatus,0);
            lvgl_port_unlock();
        }

    }
}