/*
 * Copyright 2016 Hippo Seven
 *
 * 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.
 */

package com.hippo.ehviewer.ui;

import android.content.Context;
import android.content.res.Configuration;
import android.content.res.Resources;
import android.os.Bundle;
import android.view.WindowManager;

import androidx.annotation.Nullable;
import androidx.annotation.StyleRes;
import androidx.appcompat.app.AppCompatActivity;

import com.hippo.content.ContextLocalWrapper;
import com.hippo.ehviewer.EhApplication;
import com.hippo.ehviewer.R;
import com.hippo.ehviewer.Settings;

import java.util.Locale;
import java.util.Objects;

public abstract class EhActivity extends AppCompatActivity {

    private static final String THEME_DEFAULT = "DEFAULT";
    private static final String THEME_BLACK = "BLACK";
    private String mTheme;

    public static boolean isBlackNightTheme() {
        return Settings.getBoolean("black_dark_theme", false);
    }

    public static String getTheme(Context context) {
        if (isBlackNightTheme()
                && isNightMode(context.getResources().getConfiguration()))
            return THEME_BLACK;

        return THEME_DEFAULT;
    }

    public static boolean isNightMode(Configuration configuration) {
        return (configuration.uiMode & Configuration.UI_MODE_NIGHT_YES) > 0;
    }

    @Override
    protected void onApplyThemeResource(Resources.Theme theme, int resid, boolean first) {
        // apply real style and our custom style
        if (getParent() == null) {
            theme.applyStyle(resid, true);
        } else {
            try {
                theme.setTo(getParent().getTheme());
            } catch (Exception e) {
                // Empty
            }
            theme.applyStyle(resid, false);
        }
        theme.applyStyle(getThemeStyleRes(this), true);
        // only pass theme style to super, so styled theme will not be overwritten
        super.onApplyThemeResource(theme, R.style.ThemeOverlay, first);
    }

    @StyleRes
    public int getThemeStyleRes(Context context) {
        switch (getTheme(context)) {
            case THEME_BLACK:
                return R.style.ThemeOverlay_Black;
            case THEME_DEFAULT:
            default:
                return R.style.ThemeOverlay;
        }
    }

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        ((EhApplication) getApplication()).registerActivity(this);

        mTheme = getTheme(this);
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        ((EhApplication) getApplication()).unregisterActivity(this);
    }

    @Override
    protected void onResume() {
        super.onResume();
        if (Settings.getEnabledSecurity()) {
            getWindow().setFlags(WindowManager.LayoutParams.FLAG_SECURE,
                    WindowManager.LayoutParams.FLAG_SECURE);
        } else {
            getWindow().clearFlags(WindowManager.LayoutParams.FLAG_SECURE);
        }
        if (!Objects.equals(mTheme, getTheme(this))) {
            recreate();
        }
    }

    @Override
    protected void attachBaseContext(Context newBase) {
        Locale locale = null;
        String language = Settings.getAppLanguage();
        if (language != null && !language.equals("system")) {
            String[] split = language.split("-");
            if (split.length == 1) {
                locale = new Locale(split[0]);
            } else if (split.length == 2) {
                locale = new Locale(split[0], split[1]);
            } else if (split.length == 3) {
                locale = new Locale(split[0], split[1], split[2]);
            }
        }

        if (locale != null) {
            newBase = ContextLocalWrapper.wrap(newBase, locale);
        }

        super.attachBaseContext(newBase);
    }
}