/*
 * Copyright (c) 2022 HiSilicon (Shanghai) Technologies CO., LIMITED.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "wifi_starter.h"
#include "cmsis_os2.h"

#include "lwip/netifapi.h"

static volatile int g_hotspotStarted = 0;

static void OnHotspotStateChanged(int state)
{
    printf("OnHotspotStateChanged: %d.\r\n", state);
    if (state == WIFI_HOTSPOT_ACTIVE) {
        g_hotspotStarted = 1;
    } else {
        g_hotspotStarted = 0;
    }
}

static volatile int g_joinedStations = 0;

static void PrintStationInfo(const StationInfo* info)
{
    int len = 0;

    if (!info) {
        return;
    }
    static char macAddress[32] = {0};
    unsigned char* mac = info->macAddress;
    if (snprintf_s(macAddress, sizeof(macAddress) + 1, sizeof(macAddress), "%02X:%02X:%02X:%02X:%02X:%02X",
        mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]) < 0) { /* mac地址从0,1,2,3,4,5位 */
            return;
    }
}

static void OnHotspotStaJoin(const StationInfo* info)
{
    g_joinedStations++;
    PrintStationInfo(info);
    printf("+OnHotspotStaJoin: active stations = %d.\r\n", g_joinedStations);
}

static void OnHotspotStaLeave(const StationInfo* info)
{
    g_joinedStations--;
    PrintStationInfo(info);
    printf("-OnHotspotStaLeave: active stations = %d.\r\n", g_joinedStations);
}

WifiEvent g_defaultWifiEventListener = {
    .OnHotspotStaJoin = OnHotspotStaJoin,
    .OnHotspotStaLeave = OnHotspotStaLeave,
    .OnHotspotStateChanged = OnHotspotStateChanged,
};

static struct netif* g_iface = NULL;

#define SSID_LEN    (11)

int StartHotspot(void)
{
    WifiErrorCode errCode;
    errCode = WIFI_SUCCESS;

    HotspotConfig config = {0};

    // 准备AP的配置参数
    strcpy_s(config.ssid, SSID_LEN, "HiSpark-AP");
    config.securityType = WIFI_SEC_TYPE_OPEN;
    config.band = HOTSPOT_BAND_TYPE_2G;
    config.channelNum = 7; /* 7: channel number */

    errCode = RegisterWifiEvent(&g_defaultWifiEventListener);
    printf("RegisterWifiEvent: %d\r\n", errCode);

    errCode = SetHotspotConfig(&config);
    printf("SetHotspotConfig: %d\r\n", errCode);

    g_hotspotStarted = 0;
    errCode = EnableHotspot();
    printf("EnableHotspot: %d\r\n", errCode);

    while (!g_hotspotStarted) {
        osDelay(10); /* 10 : OS Sleep 10 ms */
    }
    printf("g_hotspotStarted = %d.\r\n", g_hotspotStarted);

    g_iface = netifapi_netif_find("ap1");
    if (g_iface) {
        ip4_addr_t ipaddr;
        ip4_addr_t gateway;
        ip4_addr_t netmask;

        IP4_ADDR(&ipaddr,  192, 168, 1, 1);     /* input your IP for example: 192.168.1.1 */
        IP4_ADDR(&gateway, 192, 168, 1, 1);     /* input your gateway for example: 192.168.1.1 */
        IP4_ADDR(&netmask, 255, 255, 255, 0);   /* input your netmask for example: 255.255.255.0 */
        err_t ret = netifapi_netif_set_addr(g_iface, &ipaddr, &netmask, &gateway);
        printf("netifapi_netif_set_addr: %d\r\n", ret);

        ret = netifapi_dhcps_start(g_iface, 0, 0);
        printf("netifapi_dhcp_start: %d\r\n", ret);
    }
    return errCode;
}

void StopHotspot(void)
{
    if (g_iface) {
        err_t ret = netifapi_dhcps_stop(g_iface);
        printf("netifapi_dhcps_stop: %d\r\n", ret);
    }

    WifiErrorCode errCode = UnRegisterWifiEvent(&g_defaultWifiEventListener);
    printf("UnRegisterWifiEvent: %d\r\n", errCode);

    errCode = DisableHotspot();
    printf("EnableHotspot: %d\r\n", errCode);
}