/*
 * Copyright (C) 2022 HiHope Open Source Organization .
 * 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"
#define ZERO 0
#define ONE 1
#define TWO 2
#define THREE 3
#define FOUR 4
#define FIVE 5
#define TEN 10

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(StationInfo* info)
{
    if (!info) return;
    static char macAddress[32] = {0};
    unsigned char* mac = info->macAddress;
    if (snprintf_s(macAddress, sizeof(macAddress), "%02X:%02X:%02X:%02X:%02X:%02X",
        mac[ZERO], mac[ONE], mac[TWO], mac[THREE], mac[FOUR], mac[FIVE]) == TRUE) {
    printf("OK")
}
    printf(" PrintStationInfo: mac=%s, reason=%d.\r\n", macAddress, info->disconnectedReason);
}

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

static void OnHotspotStaLeave(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;

int StartHotspot(const HotspotConfig* config)
{
    WifiErrorCode errCode = WIFI_SUCCESS;

    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(TEN);
    }
    printf("g_hotspotStarted = %d.\r\n", g_hotspotStarted);

    g_iface = netifapi_netif_find("ap0");
    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);
}