/*
 * This is the source code of Telegram for Android v. 5.x.x.
 * It is licensed under GNU GPL v. 2 or later.
 * You should have received a copy of the license in this archive (see LICENSE).
 *
 * Copyright Nikolai Kudashov, 2013-2018.
 */

package org.telegram.messenger;

import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlarmManager;
import android.app.Application;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.pm.ApplicationInfo;
import android.content.res.Configuration;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Handler;
import android.os.PowerManager;
import android.os.SystemClock;
import android.telephony.TelephonyManager;
import android.text.TextUtils;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.firebase.messaging.FirebaseMessaging;

import org.telegram.messenger.voip.VideoCapturerDevice;
import org.telegram.tgnet.ConnectionsManager;
import org.telegram.tgnet.TLRPC;
import org.telegram.ui.Components.ForegroundDetector;

import java.io.File;

import androidx.multidex.MultiDex;

public class ApplicationLoader extends Application {

    @SuppressLint("StaticFieldLeak")
    public static volatile Context applicationContext;
    public static volatile NetworkInfo currentNetworkInfo;
    public static volatile Handler applicationHandler;

    private static ConnectivityManager connectivityManager;
    private static volatile boolean applicationInited = false;

    public static long startTime;

    public static volatile boolean isScreenOn = false;
    public static volatile boolean mainInterfacePaused = true;
    public static volatile boolean mainInterfaceStopped = true;
    public static volatile boolean externalInterfacePaused = true;
    public static volatile boolean mainInterfacePausedStageQueue = true;
    public static boolean canDrawOverlays;
    public static volatile long mainInterfacePausedStageQueueTime;

    public static boolean hasPlayServices;

    @Override
    protected void attachBaseContext(Context base) {
        super.attachBaseContext(base);
        MultiDex.install(this);
    }

    public static File getFilesDirFixed() {
        for (int a = 0; a < 10; a++) {
            File path = ApplicationLoader.applicationContext.getFilesDir();
            if (path != null) {
                return path;
            }
        }
        try {
            ApplicationInfo info = applicationContext.getApplicationInfo();
            File path = new File(info.dataDir, "files");
            path.mkdirs();
            return path;
        } catch (Exception e) {
            FileLog.e(e);
        }
        return new File("/data/data/org.telegram.messenger/files");
    }

    public static void postInitApplication() {
        if (applicationInited) {
            return;
        }
        applicationInited = true;

        try {
            LocaleController.getInstance(); //TODO improve
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            connectivityManager = (ConnectivityManager) ApplicationLoader.applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE);
            BroadcastReceiver networkStateReceiver = new BroadcastReceiver() {
                @Override
                public void onReceive(Context context, Intent intent) {
                    try {
                        currentNetworkInfo = connectivityManager.getActiveNetworkInfo();
                    } catch (Throwable ignore) {

                    }

                    boolean isSlow = isConnectionSlow();
                    for (int a = 0; a < UserConfig.MAX_ACCOUNT_COUNT; a++) {
                        ConnectionsManager.getInstance(a).checkConnection();
                        FileLoader.getInstance(a).onNetworkChanged(isSlow);
                    }
                }
            };
            IntentFilter filter = new IntentFilter(ConnectivityManager.CONNECTIVITY_ACTION);
            ApplicationLoader.applicationContext.registerReceiver(networkStateReceiver, filter);
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            final IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_ON);
            filter.addAction(Intent.ACTION_SCREEN_OFF);
            final BroadcastReceiver mReceiver = new ScreenReceiver();
            applicationContext.registerReceiver(mReceiver, filter);
        } catch (Exception e) {
            e.printStackTrace();
        }

        try {
            PowerManager pm = (PowerManager) ApplicationLoader.applicationContext.getSystemService(Context.POWER_SERVICE);
            isScreenOn = pm.isScreenOn();
            if (BuildVars.LOGS_ENABLED) {
                FileLog.d("screen state = " + isScreenOn);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        SharedConfig.loadConfig();
        for (int a = 0; a < UserConfig.MAX_ACCOUNT_COUNT; a++) { //TODO improve account
            UserConfig.getInstance(a).loadConfig();
            MessagesController.getInstance(a);
            if (a == 0) {
                SharedConfig.pushStringStatus = "__FIREBASE_GENERATING_SINCE_" + ConnectionsManager.getInstance(a).getCurrentTime() + "__";
            } else {
                ConnectionsManager.getInstance(a);
            }
            TLRPC.User user = UserConfig.getInstance(a).getCurrentUser();
            if (user != null) {
                MessagesController.getInstance(a).putUser(user, true);
                SendMessagesHelper.getInstance(a).checkUnsentMessages();
            }
        }

        ApplicationLoader app = (ApplicationLoader) ApplicationLoader.applicationContext;
        app.initPlayServices();
        if (BuildVars.LOGS_ENABLED) {
            FileLog.d("app initied");
        }

        MediaController.getInstance();
        for (int a = 0; a < UserConfig.MAX_ACCOUNT_COUNT; a++) { //TODO improve account
            ContactsController.getInstance(a).checkAppAccount();
            DownloadController.getInstance(a);
        }
        ChatThemeController.init();
    }

    public ApplicationLoader() {
        super();
    }

    @Override
    public void onCreate() {
        try {
            applicationContext = getApplicationContext();
        } catch (Throwable ignore) {

        }

        super.onCreate();

        if (BuildVars.LOGS_ENABLED) {
            FileLog.d("app start time = " + (startTime = SystemClock.elapsedRealtime()));
        }
        if (applicationContext == null) {
            applicationContext = getApplicationContext();
        }

        NativeLoader.initNativeLibs(ApplicationLoader.applicationContext);
        ConnectionsManager.native_setJava(false);
        new ForegroundDetector(this) {
            @Override
            public void onActivityStarted(Activity activity) {
                boolean wasInBackground = isBackground();
                super.onActivityStarted(activity);
                if (wasInBackground) {
                    ensureCurrentNetworkGet(true);
                }
            }
        };
        if (BuildVars.LOGS_ENABLED) {
            FileLog.d("load libs time = " + (SystemClock.elapsedRealtime() - startTime));
        }

        applicationHandler = new Handler(applicationContext.getMainLooper());

        AndroidUtilities.runOnUIThread(ApplicationLoader::startPushService);
    }

    public static void startPushService() {
        SharedPreferences preferences = MessagesController.getGlobalNotificationsSettings();
        boolean enabled;
        if (preferences.contains("pushService")) {
            enabled = preferences.getBoolean("pushService", true);
        } else {
            enabled = MessagesController.getMainSettings(UserConfig.selectedAccount).getBoolean("keepAliveService", false);
        }
        if (enabled) {
            try {
                applicationContext.startService(new Intent(applicationContext, NotificationsService.class));
            } catch (Throwable ignore) {

            }
        } else {
            applicationContext.stopService(new Intent(applicationContext, NotificationsService.class));

            PendingIntent pintent = PendingIntent.getService(applicationContext, 0, new Intent(applicationContext, NotificationsService.class), 0);
            AlarmManager alarm = (AlarmManager)applicationContext.getSystemService(Context.ALARM_SERVICE);
            alarm.cancel(pintent);
        }
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        try {
            LocaleController.getInstance().onDeviceConfigurationChange(newConfig);
            AndroidUtilities.checkDisplaySize(applicationContext, newConfig);
            VideoCapturerDevice.checkScreenCapturerSize();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private void initPlayServices() {
        AndroidUtilities.runOnUIThread(() -> {
            if (hasPlayServices = checkPlayServices()) {
                final String currentPushString = SharedConfig.pushString;
                if (!TextUtils.isEmpty(currentPushString)) {
                    if (BuildVars.DEBUG_PRIVATE_VERSION && BuildVars.LOGS_ENABLED) {
                        FileLog.d("GCM regId = " + currentPushString);
                    }
                } else {
                    if (BuildVars.LOGS_ENABLED) {
                        FileLog.d("GCM Registration not found.");
                    }
                }
                Utilities.globalQueue.postRunnable(() -> {
                    try {
                        SharedConfig.pushStringGetTimeStart = SystemClock.elapsedRealtime();
                        FirebaseMessaging.getInstance().getToken()
                                .addOnCompleteListener(task -> {
                                    SharedConfig.pushStringGetTimeEnd = SystemClock.elapsedRealtime();
                                    if (!task.isSuccessful()) {
                                        if (BuildVars.LOGS_ENABLED) {
                                            FileLog.d("Failed to get regid");
                                        }
                                        SharedConfig.pushStringStatus = "__FIREBASE_FAILED__";
                                        GcmPushListenerService.sendRegistrationToServer(null);
                                        return;
                                    }
                                    String token = task.getResult();
                                    if (!TextUtils.isEmpty(token)) {
                                        GcmPushListenerService.sendRegistrationToServer(token);
                                    }
                                });
                    } catch (Throwable e) {
                        FileLog.e(e);
                    }
                });
            } else {
                if (BuildVars.LOGS_ENABLED) {
                    FileLog.d("No valid Google Play Services APK found.");
                }
                SharedConfig.pushStringStatus = "__NO_GOOGLE_PLAY_SERVICES__";
                GcmPushListenerService.sendRegistrationToServer(null);
            }
        }, 1000);
    }

    private boolean checkPlayServices() {
        try {
            int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
            return resultCode == ConnectionResult.SUCCESS;
        } catch (Exception e) {
            FileLog.e(e);
        }
        return true;
    }

    private static void ensureCurrentNetworkGet(boolean force) {
        if (force || currentNetworkInfo == null) {
            try {
                if (connectivityManager == null) {
                    connectivityManager = (ConnectivityManager) ApplicationLoader.applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE);
                }
                currentNetworkInfo = connectivityManager.getActiveNetworkInfo();
            } catch (Throwable ignore) {

            }
        }
    }

    public static boolean isRoaming() {
        try {
            ensureCurrentNetworkGet(false);
            return currentNetworkInfo != null && currentNetworkInfo.isRoaming();
        } catch (Exception e) {
            FileLog.e(e);
        }
        return false;
    }

    public static boolean isConnectedOrConnectingToWiFi() {
        try {
            ensureCurrentNetworkGet(false);
            if (currentNetworkInfo != null && (currentNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI || currentNetworkInfo.getType() == ConnectivityManager.TYPE_ETHERNET)) {
                NetworkInfo.State state = currentNetworkInfo.getState();
                if (state == NetworkInfo.State.CONNECTED || state == NetworkInfo.State.CONNECTING || state == NetworkInfo.State.SUSPENDED) {
                    return true;
                }
            }
        } catch (Exception e) {
            FileLog.e(e);
        }
        return false;
    }

    public static boolean isConnectedToWiFi() {
        try {
            ensureCurrentNetworkGet(false);
            if (currentNetworkInfo != null && (currentNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI || currentNetworkInfo.getType() == ConnectivityManager.TYPE_ETHERNET) && currentNetworkInfo.getState() == NetworkInfo.State.CONNECTED) {
                return true;
            }
        } catch (Exception e) {
            FileLog.e(e);
        }
        return false;
    }

    public static boolean isConnectionSlow() {
        try {
            ensureCurrentNetworkGet(false);
            if (currentNetworkInfo != null && currentNetworkInfo.getType() == ConnectivityManager.TYPE_MOBILE) {
                switch (currentNetworkInfo.getSubtype()) {
                    case TelephonyManager.NETWORK_TYPE_1xRTT:
                    case TelephonyManager.NETWORK_TYPE_CDMA:
                    case TelephonyManager.NETWORK_TYPE_EDGE:
                    case TelephonyManager.NETWORK_TYPE_GPRS:
                    case TelephonyManager.NETWORK_TYPE_IDEN:
                        return true;
                }
            }
        } catch (Throwable ignore) {

        }
        return false;
    }

    public static int getAutodownloadNetworkType() {
        try {
            ensureCurrentNetworkGet(false);
            if (currentNetworkInfo == null) {
                return StatsController.TYPE_MOBILE;
            }
            if (currentNetworkInfo.getType() == ConnectivityManager.TYPE_WIFI || currentNetworkInfo.getType() == ConnectivityManager.TYPE_ETHERNET) {
                if (connectivityManager.isActiveNetworkMetered()) {
                    return StatsController.TYPE_MOBILE;
                } else {
                    return StatsController.TYPE_WIFI;
                }
            }
            if (currentNetworkInfo.isRoaming()) {
                return StatsController.TYPE_ROAMING;
            }
        } catch (Exception e) {
            FileLog.e(e);
        }
        return StatsController.TYPE_MOBILE;
    }

    public static int getCurrentNetworkType() {
        if (isConnectedOrConnectingToWiFi()) {
            return StatsController.TYPE_WIFI;
        } else if (isRoaming()) {
            return StatsController.TYPE_ROAMING;
        } else {
            return StatsController.TYPE_MOBILE;
        }
    }

    public static boolean isNetworkOnlineFast() {
        try {
            ensureCurrentNetworkGet(false);
            if (currentNetworkInfo == null) {
                return true;
            }
            if (currentNetworkInfo.isConnectedOrConnecting() || currentNetworkInfo.isAvailable()) {
                return true;
            }

            NetworkInfo netInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
            if (netInfo != null && netInfo.isConnectedOrConnecting()) {
                return true;
            } else {
                netInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
                if (netInfo != null && netInfo.isConnectedOrConnecting()) {
                    return true;
                }
            }
        } catch (Exception e) {
            FileLog.e(e);
            return true;
        }
        return false;
    }

    public static boolean isNetworkOnlineRealtime() {
        try {
            ConnectivityManager connectivityManager = (ConnectivityManager) ApplicationLoader.applicationContext.getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo netInfo = connectivityManager.getActiveNetworkInfo();
            if (netInfo != null && (netInfo.isConnectedOrConnecting() || netInfo.isAvailable())) {
                return true;
            }

            netInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

            if (netInfo != null && netInfo.isConnectedOrConnecting()) {
                return true;
            } else {
                netInfo = connectivityManager.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
                if (netInfo != null && netInfo.isConnectedOrConnecting()) {
                    return true;
                }
            }
        } catch (Exception e) {
            FileLog.e(e);
            return true;
        }
        return false;
    }

    public static boolean isNetworkOnline() {
        boolean result = isNetworkOnlineRealtime();
        if (BuildVars.DEBUG_PRIVATE_VERSION) {
            boolean result2 = isNetworkOnlineFast();
            if (result != result2) {
                FileLog.d("network online mismatch");
            }
        }
        return result;
    }
}