package org.fox.ttrss;


import android.annotation.SuppressLint;
import android.app.AlarmManager;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.NotificationChannel;
import android.app.NotificationManager;
import android.app.PendingIntent;
import android.content.ComponentName;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.res.Configuration;
import android.database.sqlite.SQLiteDatabase;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.SystemClock;
import android.preference.PreferenceManager;
import android.text.TextUtils;
import android.util.Log;
import android.util.TypedValue;
import android.view.Display;
import android.view.View;
import android.widget.CheckBox;

import androidx.appcompat.app.AppCompatActivity;
import androidx.appcompat.app.AppCompatDelegate;
import androidx.browser.customtabs.CustomTabsCallback;
import androidx.browser.customtabs.CustomTabsClient;
import androidx.browser.customtabs.CustomTabsIntent;
import androidx.browser.customtabs.CustomTabsServiceConnection;
import androidx.browser.customtabs.CustomTabsSession;
import androidx.core.app.JobIntentService;
import androidx.core.content.FileProvider;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.engine.DiskCacheStrategy;
import com.bumptech.glide.request.animation.GlideAnimation;
import com.bumptech.glide.request.target.SimpleTarget;
import com.google.android.material.snackbar.Snackbar;
import com.livefront.bridge.Bridge;

import org.fox.ttrss.util.DatabaseHelper;
import org.fox.ttrss.widget.SmallWidgetProvider;
import org.fox.ttrss.widget.WidgetUpdateService;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.select.Elements;

import java.io.File;
import java.io.FileOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

import icepick.State;

public class CommonActivity extends AppCompatActivity implements SharedPreferences.OnSharedPreferenceChangeListener {
	private final String TAG = this.getClass().getSimpleName();
	
	public final static String FRAG_HEADLINES = "headlines";
	public final static String FRAG_ARTICLE = "article";
	public final static String FRAG_FEEDS = "feeds";
	public final static String FRAG_CATS = "cats";
	public final static String FRAG_DIALOG = "dialog";

	public final static String THEME_DEFAULT = "THEME_FOLLOW_DEVICE";

	public final static String NOTIFICATION_CHANNEL_NORMAL = "channel_normal";
	public final static String NOTIFICATION_CHANNEL_PRIORITY = "channel_priority";

	public static final int EXCERPT_MAX_LENGTH = 256;
    public static final int EXCERPT_MAX_QUERY_LENGTH = 2048;
	public static final int LABEL_BASE_INDEX = -1024;

	public static final int PENDING_INTENT_CHROME_SHARE = 1;

	private DatabaseHelper m_databaseHelper;

	//private SQLiteDatabase m_readableDb;
	//private SQLiteDatabase m_writableDb;

	private boolean m_smallScreenMode = true;
	@State protected String m_theme;
	private boolean m_needRestart;

	private static String s_customTabPackageName;

	static final String STABLE_PACKAGE = "com.android.chrome";
	static final String BETA_PACKAGE = "com.chrome.beta";
	static final String DEV_PACKAGE = "com.chrome.dev";
	static final String LOCAL_PACKAGE = "com.google.android.apps.chrome";
	private static final String ACTION_CUSTOM_TABS_CONNECTION =
		"android.support.customtabs.action.CustomTabsService";

	private static String getCustomTabPackageName(Context context) {
		if (s_customTabPackageName != null) return s_customTabPackageName;

		PackageManager pm = context.getPackageManager();
		// Get default VIEW intent handler.
		Intent activityIntent = new Intent(Intent.ACTION_VIEW, Uri.parse("http://www.example.com"));
		ResolveInfo defaultViewHandlerInfo = pm.resolveActivity(activityIntent, 0);
	        String defaultViewHandlerPackageName = null;
		if (defaultViewHandlerInfo != null) {
			defaultViewHandlerPackageName = defaultViewHandlerInfo.activityInfo.packageName;
		}

		// Get all apps that can handle VIEW intents.
		List<ResolveInfo> resolvedActivityList = pm.queryIntentActivities(activityIntent, 0);
		List<String> packagesSupportingCustomTabs = new ArrayList<>();
		for (ResolveInfo info : resolvedActivityList) {
			Intent serviceIntent = new Intent();
			serviceIntent.setAction(ACTION_CUSTOM_TABS_CONNECTION);
			serviceIntent.setPackage(info.activityInfo.packageName);
			if (pm.resolveService(serviceIntent, 0) != null) {
				packagesSupportingCustomTabs.add(info.activityInfo.packageName);
			}
		}

		// Now packagesSupportingCustomTabs contains all apps that can handle both VIEW intents
		// and service calls.
		if (packagesSupportingCustomTabs.isEmpty()) {
			s_customTabPackageName = null;
		} else if (packagesSupportingCustomTabs.size() == 1) {
			s_customTabPackageName = packagesSupportingCustomTabs.get(0);
		} else if (!TextUtils.isEmpty(defaultViewHandlerPackageName)
				&& packagesSupportingCustomTabs.contains(defaultViewHandlerPackageName)) {
			s_customTabPackageName = defaultViewHandlerPackageName;
		} else if (packagesSupportingCustomTabs.contains(STABLE_PACKAGE)) {
			s_customTabPackageName = STABLE_PACKAGE;
		} else if (packagesSupportingCustomTabs.contains(BETA_PACKAGE)) {
			s_customTabPackageName = BETA_PACKAGE;
		} else if (packagesSupportingCustomTabs.contains(DEV_PACKAGE)) {
			s_customTabPackageName = DEV_PACKAGE;
		} else if (packagesSupportingCustomTabs.contains(LOCAL_PACKAGE)) {
			s_customTabPackageName = LOCAL_PACKAGE;
		}

		return s_customTabPackageName;
	}

	protected CustomTabsClient m_customTabClient;
	protected CustomTabsServiceConnection m_customTabServiceConnection = new CustomTabsServiceConnection() {
		@Override
		public void onCustomTabsServiceConnected(ComponentName componentName, CustomTabsClient customTabsClient) {
			m_customTabClient = customTabsClient;

			m_customTabClient.warmup(0);
		}

		@Override
		public void onServiceDisconnected(ComponentName componentName) {
			m_customTabClient = null;
		}
	};

	protected SharedPreferences m_prefs;

	protected void setSmallScreen(boolean smallScreen) {
		Log.d(TAG, "m_smallScreenMode=" + smallScreen);
		m_smallScreenMode = smallScreen;
	}

	public DatabaseHelper getDatabaseHelper() {
		return m_databaseHelper;
	}

	public SQLiteDatabase getDatabase() {
		return m_databaseHelper.getWritableDatabase();
	}

	public boolean getUnreadOnly() {
		return m_prefs.getBoolean("show_unread_only", true);
	}

    // not the same as isSmallScreen() which is mostly about layout being loaded
    public boolean isTablet() {
        return getResources().getConfiguration().smallestScreenWidthDp >= 600;
    }

	public void setUnreadOnly(boolean unread) {
		SharedPreferences.Editor editor = m_prefs.edit();
		editor.putBoolean("show_unread_only", unread);
		editor.apply();
	}

	public void toast(int msgId) {
		toast(getString(msgId));
	}

	public void toast(String msg) {
		Snackbar.make(findViewById(android.R.id.content), msg, Snackbar.LENGTH_LONG)
				.setAction(R.string.dialog_close, new View.OnClickListener() {
					@Override
					public void onClick(View v) {

					}
				})
				.show();
	}

	@Override
	public void onResume() {
		super.onResume();

		if (m_needRestart) {
			Log.d(TAG, "restart requested");
			
			finish();
			startActivity(getIntent());
		}
	}

	@Override
	public void onDestroy() {

		if (m_customTabServiceConnection != null) {
			unbindService(m_customTabServiceConnection);
		}

		super.onDestroy();
	}

	@Override
	public void onCreate(Bundle savedInstanceState) {

		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
			NotificationManager nmgr = (NotificationManager) getSystemService(NOTIFICATION_SERVICE);

			// todo: human readable names

			NotificationChannel channel = new NotificationChannel(NOTIFICATION_CHANNEL_PRIORITY,
					NOTIFICATION_CHANNEL_PRIORITY,
					NotificationManager.IMPORTANCE_HIGH);
			channel.setShowBadge(false);
			channel.setSound(null, null);
			nmgr.createNotificationChannel(channel);

			channel = new NotificationChannel(NOTIFICATION_CHANNEL_NORMAL,
					NOTIFICATION_CHANNEL_NORMAL,
					NotificationManager.IMPORTANCE_DEFAULT);
			channel.setShowBadge(false);
			channel.setSound(null, null);
			nmgr.createNotificationChannel(channel);
		}

		m_databaseHelper = DatabaseHelper.getInstance(this);

		m_prefs = PreferenceManager
				.getDefaultSharedPreferences(getApplicationContext());

		m_prefs.registerOnSharedPreferenceChangeListener(this);

		setupWidgetUpdates(this);

		Bridge.restoreInstanceState(this, savedInstanceState);

        if (savedInstanceState == null) {
			m_theme = m_prefs.getString("theme", CommonActivity.THEME_DEFAULT);
		}

		String customTabPackageName = getCustomTabPackageName(this);

		CustomTabsClient.bindCustomTabsService(this, customTabPackageName != null ?
				customTabPackageName : "com.android.chrome", m_customTabServiceConnection);

		super.onCreate(savedInstanceState);
	}

	@Override
	public void onSaveInstanceState(Bundle out) {
		super.onSaveInstanceState(out);
		Bridge.saveInstanceState(this, out);
	}
	
	public boolean isSmallScreen() {
		return m_smallScreenMode;
	}

	@SuppressWarnings("deprecation")
	public boolean isPortrait() {
		Display display = getWindowManager().getDefaultDisplay(); 
		
	    int width = display.getWidth();
	    int height = display.getHeight();
		
	    return width < height;
	}

	@SuppressLint({ "NewApi", "ServiceCast" })
	@SuppressWarnings("deprecation")
	public void copyToClipboard(String str) {
		if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.HONEYCOMB) {
			android.text.ClipboardManager clipboard = (android.text.ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
			clipboard.setText(str);
		} else {
			android.content.ClipboardManager clipboard = (android.content.ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
			clipboard.setText(str);
		}

		Snackbar.make(findViewById(android.R.id.content), R.string.text_copied_to_clipboard, Snackbar.LENGTH_SHORT)
				.setAction(R.string.dialog_close, new View.OnClickListener() {
					@Override
					public void onClick(View v) {

					}
				})
				.show();
	}

	public boolean isUiNightMode() {
		try {
			int nightModeFlags = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;

			return Configuration.UI_MODE_NIGHT_YES == nightModeFlags;
		} catch (Exception e) {
			return false;
		}
	}

	protected void setAppTheme(SharedPreferences prefs) {
		String theme = prefs.getString("theme", CommonActivity.THEME_DEFAULT);

		Log.d(TAG, "setting theme to: " + theme);

		if ("THEME_DARK".equals(theme)) {
			AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
		} else if ("THEME_LIGHT".equals(theme)) {
			AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
		} else {
			AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
		}

		setTheme(R.style.AppTheme);
	}

	@Override
	public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
		Log.d(TAG, "onSharedPreferenceChanged:" + key);

		if ("theme".equals(key)) {
			setAppTheme(sharedPreferences);
		}

		String[] filter = new String[] { "enable_cats", "headline_mode", "widget_update_interval",
				"headlines_swipe_to_dismiss", "headlines_mark_read_scroll", "headlines_request_size",
				"force_phone_layout", "open_on_startup"};

		m_needRestart = Arrays.asList(filter).indexOf(key) != -1;
	}

	private CustomTabsSession getCustomTabSession() {
		return m_customTabClient.newSession(new CustomTabsCallback() {
			@Override
			public void onNavigationEvent(int navigationEvent, Bundle extras) {
				super.onNavigationEvent(navigationEvent, extras);
			}
		});
	}

	protected void preloadUriIfAllowed(Uri uri) {
		boolean enableCustomTabs = m_prefs.getBoolean("enable_custom_tabs", true);

		if (m_customTabClient != null && enableCustomTabs) {
			ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
			NetworkInfo info = cm.getActiveNetworkInfo();

			if (info != null && info.isConnected() && info.getType() == ConnectivityManager.TYPE_WIFI) {
				CustomTabsSession session = getCustomTabSession();
				session.mayLaunchUrl(uri, null, null);

				//toast("Preloading: " + uri.toString());
			}
		}
	}

	protected Intent getShareIntent(String text, String subject) {
		Intent shareIntent = new Intent(Intent.ACTION_SEND);
		shareIntent.setType("text/plain");
		shareIntent.putExtra(Intent.EXTRA_TEXT, text);

		if (subject != null) {
			shareIntent.putExtra(Intent.EXTRA_SUBJECT, subject);
		}

		return shareIntent;
	}

	protected void shareText(String text) {
		startActivity(Intent.createChooser(getShareIntent(text, null), text));
	}

	protected void shareText(String text, String subject) {
		startActivity(Intent.createChooser(getShareIntent(text, subject), text));
	}

	protected void shareImageFromUri(String url) {
		Glide.with(this)
				.load(url)
				.asBitmap()
				.skipMemoryCache(false)
				.diskCacheStrategy(DiskCacheStrategy.ALL)
				.into(new SimpleTarget<Bitmap>() {
					@Override
					public void onResourceReady(Bitmap resource, GlideAnimation<? super Bitmap> glideAnimation) {
						Log.d(TAG, "image resource ready: " + resource);

						if (resource != null) {
							File shareFolder = new File(getCacheDir(), "shared");

							try {
								shareFolder.mkdirs();

								File file = new File(shareFolder, "shared.png");

								FileOutputStream stream = new FileOutputStream(file);
								resource.compress(Bitmap.CompressFormat.PNG, 90, stream);
								stream.flush();
								stream.close();

								Uri shareUri = FileProvider.getUriForFile(CommonActivity.this,
										"org.fox.ttrss.SharedFileProvider", file);

								Intent intent = new Intent(android.content.Intent.ACTION_SEND);
								intent.putExtra(Intent.EXTRA_STREAM, shareUri);
								intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
								intent.setType("image/png");

								startActivity(intent);

							} catch (Exception e) {
								e.printStackTrace();
								toast(e.getMessage());
							}

						} else {
							toast(getString(R.string.img_share_failed_to_load));
						}
					}
				});
	}

	private void openUriWithCustomTab(Uri uri) {
		if (m_customTabClient != null) {
			TypedValue tvBackground = new TypedValue();
			getTheme().resolveAttribute(R.attr.colorPrimary, tvBackground, true);

			CustomTabsIntent.Builder builder = new CustomTabsIntent.Builder(getCustomTabSession());

			builder.setStartAnimations(this, R.anim.slide_in_right, R.anim.slide_out_left);
			builder.setExitAnimations(this, R.anim.slide_in_left, R.anim.slide_out_right);

			builder.setToolbarColor(tvBackground.data);
			builder.setShowTitle(true);

			Intent shareIntent = getShareIntent(uri.toString(), null);

			PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(),
					CommonActivity.PENDING_INTENT_CHROME_SHARE, shareIntent, PendingIntent.FLAG_UPDATE_CURRENT);

			builder.setActionButton(BitmapFactory.decodeResource(getResources(), R.drawable.ic_share),
					getString(R.string.share_article), pendingIntent);

			CustomTabsIntent intent = builder.build();

			try {
				intent.launchUrl(this, uri);
			} catch (Exception e) {
				e.printStackTrace();
				toast(e.getMessage());
			}
		}
	}

	// uses chrome custom tabs when available
	public void openUri(Uri uri) {
		boolean enableCustomTabs = m_prefs.getBoolean("enable_custom_tabs", true);
		final boolean askEveryTime = m_prefs.getBoolean("custom_tabs_ask_always", true);

		if (uri.getScheme() == null) {
			try {
				uri = Uri.parse("https:" + uri.toString());
			} catch (Exception e) {
				e.printStackTrace();
			}
		}

		final Uri finalUri = uri;

		if (enableCustomTabs && m_customTabClient != null) {

			if (askEveryTime) {

				View dialogView = View.inflate(this, R.layout.dialog_open_link_askcb, null);
				final CheckBox askEveryTimeCB = dialogView.findViewById(R.id.open_link_ask_checkbox);

				AlertDialog.Builder builder = new AlertDialog.Builder(
						CommonActivity.this)
						.setView(dialogView)
						.setMessage(uri.toString())
						.setPositiveButton(R.string.quick_preview,
								new Dialog.OnClickListener() {
									public void onClick(DialogInterface dialog,
														int which) {

										if (!askEveryTimeCB.isChecked()) {
											SharedPreferences.Editor editor = m_prefs.edit();
											editor.putBoolean("custom_tabs_ask_always", false);
											editor.apply();
										}

										openUriWithCustomTab(finalUri);

									}
								})
						.setNegativeButton(R.string.open_with,
								new Dialog.OnClickListener() {
									public void onClick(DialogInterface dialog,
														int which) {

										if (!askEveryTimeCB.isChecked()) {
											SharedPreferences.Editor editor = m_prefs.edit();
											editor.putBoolean("custom_tabs_ask_always", false);
											editor.putBoolean("enable_custom_tabs", false);
											editor.apply();
										}

										Intent intent = new Intent(Intent.ACTION_VIEW, finalUri);

										try {
											startActivity(intent);
										} catch (Exception e) {
											e.printStackTrace();
											toast(e.getMessage());
										}

									}
								});
						/*.setNegativeButton(R.string.cancel,
							new Dialog.OnClickListener() {
								public void onClick(DialogInterface dialog,
													int which) {

									if (!askEveryTimeCB.isChecked()) {
										SharedPreferences.Editor editor = m_prefs.edit();
										editor.putBoolean("custom_tabs_ask_always", false);
										editor.apply();
									}

								}
							});*/

				AlertDialog dlg = builder.create();
				dlg.show();

			} else {
				openUriWithCustomTab(uri);
			}

		} else {
			Intent intent = new Intent(Intent.ACTION_VIEW, uri);

			try {
				startActivity(intent);
			} catch (Exception e) {
				toast(e.getMessage());
			}
		}
	}

	public static void setupWidgetUpdates(Context context) {
		SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);

		int updateInterval = Integer.parseInt(prefs.getString("widget_update_interval", "15")) * 60 * 1000;

		Log.d("setupWidgetUpdates", "interval= " + updateInterval);

		AlarmManager alarmManager = (AlarmManager)context.getSystemService(ALARM_SERVICE);

		Intent intentUpdate = new Intent(context, SmallWidgetProvider.class);
		intentUpdate.setAction(SmallWidgetProvider.ACTION_REQUEST_UPDATE);

		PendingIntent pendingIntentAlarm = PendingIntent.getBroadcast(context,
				0, intentUpdate, PendingIntent.FLAG_UPDATE_CURRENT);

		alarmManager.cancel(pendingIntentAlarm);

		alarmManager.setRepeating(AlarmManager.ELAPSED_REALTIME,
				SystemClock.elapsedRealtime() + updateInterval,
				updateInterval,
				pendingIntentAlarm);

	}

	public void displayImageCaption(String url, String htmlContent) {
		// Android doesn't give us an easy way to access title tags;
		// we'll use Jsoup on the body text to grab the title text
		// from the first image tag with this url. This will show
		// the wrong text if an image is used multiple times.
		Document doc = Jsoup.parse(htmlContent);
		Elements es = doc.getElementsByAttributeValue("src", url);
		if (es.size() > 0) {
			if (es.get(0).hasAttr("title")) {

				AlertDialog.Builder builder = new AlertDialog.Builder(this)
					.setCancelable(true)
					.setMessage(es.get(0).attr("title"))
					.setPositiveButton(R.string.dialog_close, new DialogInterface.OnClickListener() {
							@Override
							public void onClick(DialogInterface dialog, int which) {
								dialog.cancel();
								}
							}
					);

				AlertDialog dialog = builder.create();
				dialog.show();

			} else {
				toast(R.string.no_caption_to_display);
			}
		} else {
			toast(R.string.no_caption_to_display);
		}
	}

	@Override
	public void onTrimMemory(int level) {
		super.onTrimMemory(level);
		Log.d(TAG, "onTrimMemory called");
		Glide.get(this).trimMemory(level);
	}

	@Override
	public void onLowMemory() {
		super.onLowMemory();
		Log.d(TAG, "onLowMemory called");
		Glide.get(this).clearMemory();
	}

	public static void requestWidgetUpdate(Context context) {
		JobIntentService.enqueueWork(context.getApplicationContext(), WidgetUpdateService.class, 0, new Intent());
	}

}