/******************************************************************************
 * 作者：kerwincui
 * 时间：2021-06-08
 * 邮箱：164770707@qq.com
 * 源码地址：https://gitee.com/kerwincui/wumei-smart
 * author: kerwincui
 * create: 2021-06-08
 * email：164770707@qq.com
 * source:https://github.com/kerwincui/wumei-smart
 ******************************************************************************/
#include "wifi.h"
#include "common.h"
#include "led.h"
#include "mqtt.h"
#include "http_server.h"

static const char *TAG = "wifi";
static int s_retry_num = 0;
static EventGroupHandle_t s_wifi_event_group;
static esp_event_handler_instance_t instance_any_id;
static esp_event_handler_instance_t instance_got_ip;

// 站点回调函数
static void station_event_handler(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data)
{
    printf("station event handler begin \n\n\n");
    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_wifi_connect();
        // if (s_retry_num < 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) {
        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);
    }
}

// AP回调函数
static void soft_ap_event_handler(void* arg, esp_event_base_t event_base,
                                    int32_t event_id, void* event_data)
{
    if (event_id == WIFI_EVENT_AP_STACONNECTED) {
        wifi_event_ap_staconnected_t* event = (wifi_event_ap_staconnected_t*) event_data;
        ESP_LOGI(TAG, "station "MACSTR" join, AID=%d", MAC2STR(event->mac), event->aid);
    } else if (event_id == WIFI_EVENT_AP_STADISCONNECTED) {
        wifi_event_ap_stadisconnected_t* event = (wifi_event_ap_stadisconnected_t*) event_data;
        ESP_LOGI(TAG, "station "MACSTR" leave, AID=%d", MAC2STR(event->mac), event->aid);
    }
}

//站点模式
static void wifi_station_init(void)
{    
    esp_netif_create_default_wifi_sta();
    ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT, ESP_EVENT_ANY_ID, &station_event_handler, NULL, &instance_any_id));
    ESP_ERROR_CHECK(esp_event_handler_instance_register(IP_EVENT, IP_EVENT_STA_GOT_IP, &station_event_handler, NULL, &instance_got_ip));
    wifi_config_t wifi_config = {
        .sta = {
            .ssid = "",
            .password = "",
            .listen_interval = LISTEN_INTERVAL,
            /*  设置密码意味着工作站将连接到包括WEP/WPA在内的所有安全模式。但是，这些模式已被弃用，不建议使用。
             *  如果您的接入点不支持WPA2，可以通过在下面的行注释来启用这些模式 */
	        //.threshold.authmode = WIFI_AUTH_WPA2_PSK,

            //PMF功能
            .pmf_cfg = {
                .capable = true,
                .required = false
            },
        },
    };
    strcpy((char *)wifi_config.sta.ssid,(char *)ssid);
    strcpy((char *)wifi_config.sta.password,(char *)pwd);
    ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &wifi_config));
}


//启动wifi站点模式
void wifi_start(void)
{
    s_wifi_event_group = xEventGroupCreate();
    ESP_ERROR_CHECK(esp_netif_init());
    
    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK(esp_wifi_init(&cfg));
    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));

    ESP_LOGI(TAG, "ESP_WIFI_MODE_STA");
    wifi_station_init();

    ESP_ERROR_CHECK(esp_wifi_start());

    // 省电模式
    esp_wifi_set_ps(POWER_SAVE_MODE);

    //STATION模式，等待建立连接或者超过连接最大次数后连接失败，比特位是通过事件处理程序设置
    EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
            WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
            pdFALSE,
            pdFALSE,
            portMAX_DELAY);

    if (bits & WIFI_CONNECTED_BIT) {
        ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",ssid, pwd);
        wifi_status=1;
        led_status();
    } else if (bits & WIFI_FAIL_BIT) {
        ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s", ssid, pwd);
    } else {
        ESP_LOGE(TAG, "UNEXPECTED EVENT");
    }
}

// 停止wifi
void wifi_mqtt_stop(void)
{
    if(is_wifi_offline==0){
        // 停止mqtt和wifi
        mqtt_stop();
        esp_wifi_stop();
        wifi_status=0;
        led_status();
    }
}

// 继续wifi站点模式
void wifi_continue(void)
{
    ESP_ERROR_CHECK(esp_wifi_start());

    //STATION模式，等待建立连接或者超过连接最大次数后连接失败，比特位是通过事件处理程序设置
    EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
            WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
            pdFALSE,
            pdFALSE,
            portMAX_DELAY);

    if (bits & WIFI_CONNECTED_BIT) {
        ESP_LOGI(TAG, "connected to ap SSID:%s password:%s",ssid, pwd);
        wifi_status=1;
        led_status();
    } else if (bits & WIFI_FAIL_BIT) {
        ESP_LOGI(TAG, "Failed to connect to SSID:%s, password:%s", ssid, pwd);
    } else {
        ESP_LOGE(TAG, "UNEXPECTED EVENT");
    }
}

//启动AP
void ap_start(void)
{
    wifi_mqtt_stop();

    ESP_LOGI(TAG, "ESP_WIFI_MODE_AP"); 
    ESP_ERROR_CHECK(esp_netif_init());    
    esp_netif_create_default_wifi_ap();

    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,
                                                        &soft_ap_event_handler,
                                                        NULL,
                                                        NULL));

    wifi_config_t wifi_config = {
        .ap = {
            .ssid = AP_SSID,
            .ssid_len = strlen(AP_SSID),
            .channel = AP_CHANNEL,
            .password = AP_PASS,
            .max_connection = AP_MAX_STA_CONN,
            .authmode = WIFI_AUTH_WPA_WPA2_PSK
        },
    };
    if (strlen(AP_PASS) == 0) {
        wifi_config.ap.authmode = WIFI_AUTH_OPEN;
    }

    ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
    ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
    ESP_ERROR_CHECK(esp_wifi_start());
    ESP_LOGI(TAG, "wifi_init_softap finished. SSID:%s password:%s channel:%d", AP_SSID, AP_PASS, AP_CHANNEL);

    //启动web服务
    http_server_start();
}