package cgeo.geocaching;

import cgeo.geocaching.sensors.Sensors;
import cgeo.geocaching.settings.Settings;
import cgeo.geocaching.utils.Log;
import cgeo.geocaching.utils.OOMDumpingUncaughtExceptionHandler;
import cgeo.geocaching.utils.RxUtils;

import org.eclipse.jdt.annotation.NonNull;

import android.app.Application;
import android.view.ViewConfiguration;

import java.lang.reflect.Field;

public class CgeoApplication extends Application {

    private boolean forceRelog = false; // c:geo needs to log into cache providers
    public boolean showLoginToast = true; //login toast shown just once.
    private boolean liveMapHintShownInThisSession = false; // livemap hint has been shown
    private static CgeoApplication instance;
    private boolean isGooglePlayServicesAvailable = false;

    public static void dumpOnOutOfMemory(final boolean enable) {

        if (enable) {

            if (!OOMDumpingUncaughtExceptionHandler.activateHandler()) {
                Log.e("OOM dumping handler not activated (either a problem occured or it was already active)");
            }
        } else {
            if (!OOMDumpingUncaughtExceptionHandler.resetToDefault()) {
                Log.e("OOM dumping handler not resetted (either a problem occured or it was not active)");
            }
        }
    }

    public CgeoApplication() {
        setInstance(this);
    }

    private static void setInstance(@NonNull final CgeoApplication application) {
        instance = application;
    }

    public static CgeoApplication getInstance() {
        return instance;
    }

    @Override
    public void onCreate() {
        try {
            final ViewConfiguration config = ViewConfiguration.get(this);
            final Field menuKeyField = ViewConfiguration.class.getDeclaredField("sHasPermanentMenuKey");
            menuKeyField.setAccessible(true);
            menuKeyField.setBoolean(config, false);
        } catch (IllegalArgumentException | IllegalAccessException | NoSuchFieldException ignored) {
        }

        // Set language to English if the user decided so.
        Settings.setLanguage(Settings.isUseEnglish());

        // ensure initialization of lists
        DataStore.getLists();

        final Sensors sensors = Sensors.getInstance();
        sensors.setupGeoDataObservables(Settings.useGooglePlayServices(), Settings.useLowPowerMode());
        sensors.setupDirectionObservable(Settings.useLowPowerMode());

        // Attempt to acquire an initial location before any real activity happens.
        sensors.geoDataObservable(true).subscribeOn(RxUtils.looperCallbacksScheduler).first().subscribe();
    }


    @Override
    public void onLowMemory() {
        onTrimMemory(TRIM_MEMORY_COMPLETE);
    }

    @Override
    public void onTrimMemory(final int level) {
        if (level >= TRIM_MEMORY_MODERATE) {
            Log.i("Cleaning applications cache to trim memory");
            DataStore.removeAllFromCache();
        }
    }

    public boolean isLiveMapHintShownInThisSession() {
        return liveMapHintShownInThisSession;
    }

    public void setLiveMapHintShownInThisSession() {
        liveMapHintShownInThisSession = true;
    }

    /**
     * Check if cgeo must relog even if already logged in.
     *
     * @return <code>true</code> if it is necessary to relog
     */
    public boolean mustRelog() {
        final boolean mustLogin = forceRelog;
        forceRelog = false;
        return mustLogin;
    }

    /**
     * Force cgeo to relog when reaching the main activity.
     */
    public void forceRelog() {
        forceRelog = true;
    }

    public boolean isGooglePlayServicesAvailable() {
        return isGooglePlayServicesAvailable;
    }

}