package info.nightscout.androidaps.receivers;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.SupplicantState;
import android.net.wifi.WifiInfo;
import android.net.wifi.WifiManager;
import androidx.annotation.Nullable;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import info.nightscout.androidaps.MainApp;
import info.nightscout.androidaps.events.EventNetworkChange;
import info.nightscout.androidaps.logging.L;
import info.nightscout.androidaps.plugins.bus.RxBus;

public class NetworkChangeReceiver extends BroadcastReceiver {

    private static Logger log = LoggerFactory.getLogger(L.CORE);

    private static EventNetworkChange lastEvent = null;

    @Override
    public void onReceive(final Context context, final Intent intent) {
        EventNetworkChange event = grabNetworkStatus(context);
        if (event != null)
            RxBus.INSTANCE.send(event);
    }

    @Nullable
    public static EventNetworkChange grabNetworkStatus(final Context context) {
        EventNetworkChange event = new EventNetworkChange();

        ConnectivityManager cm = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
        if (cm == null) return null;
        NetworkInfo activeNetwork = cm.getActiveNetworkInfo();

        if (activeNetwork != null) {
            if (activeNetwork.getType() == ConnectivityManager.TYPE_WIFI && activeNetwork.isConnected()) {
                event.setWifiConnected(true);
                WifiManager wifiManager = (WifiManager) MainApp.instance().getApplicationContext().getSystemService(Context.WIFI_SERVICE);
                if (wifiManager != null) {
                    WifiInfo wifiInfo = wifiManager.getConnectionInfo();
                    if (wifiInfo.getSupplicantState() == SupplicantState.COMPLETED) {
                        event.setSsid(wifiInfo.getSSID());
                    }
                    if (L.isEnabled(L.CORE))
                        log.debug("NETCHANGE: Wifi connected. SSID: " + event.connectedSsid());
                }
            }

            if (activeNetwork.getType() == ConnectivityManager.TYPE_MOBILE) {
                event.setMobileConnected(true);
                event.setRoaming(activeNetwork.isRoaming());
                if (L.isEnabled(L.CORE))
                    log.debug("NETCHANGE: Mobile connected. Roaming: " + event.getRoaming());
            }
        } else {
            if (L.isEnabled(L.CORE))
                log.debug("NETCHANGE: Disconnected.");
        }

        lastEvent = event;
        return event;
    }

    public static boolean isWifiConnected() {
        return lastEvent != null && lastEvent.getWifiConnected();
    }

    public static boolean isConnected() {
        return lastEvent != null && (lastEvent.getWifiConnected() || lastEvent.getMobileConnected());
    }

    public static EventNetworkChange getLastEvent() {
        return lastEvent;
    }
}