/*
 * Copyright (C) 2021 The Android Open Source Project
 *
 * 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.android.car.carlauncher;

import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_TRUSTED_OVERLAY;

import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.WindowManager;

import androidx.collection.ArraySet;
import androidx.fragment.app.FragmentActivity;
import androidx.fragment.app.FragmentTransaction;
import androidx.lifecycle.ViewModelProvider;

import com.android.car.carlauncher.homescreen.HomeCardModule;

import java.util.Set;

/**
 * Launcher activity that shows only the control bar fragment.
 */
public class ControlBarActivity extends FragmentActivity {
    private static final String TAG = "CarLauncher";
    private static final boolean DEBUG = false;

    private Set<HomeCardModule> mHomeCardModules;

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

        // Setting as trusted overlay to let touches pass through.
        getWindow().addPrivateFlags(PRIVATE_FLAG_TRUSTED_OVERLAY);
        // To pass touches to the underneath task.
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL);

        setContentView(R.layout.control_bar_container);
        initializeCards();
    }

    @Override
    public void onConfigurationChanged(Configuration newConfig) {
        super.onConfigurationChanged(newConfig);
        initializeCards();
    }

    private void initializeCards() {
        if (mHomeCardModules == null) {
            mHomeCardModules = new ArraySet<>();
            for (String providerClassName : getResources().getStringArray(
                    R.array.config_homeCardModuleClasses)) {
                try {
                    long reflectionStartTime = System.currentTimeMillis();
                    HomeCardModule cardModule = (HomeCardModule) Class.forName(
                            providerClassName).newInstance();
                    cardModule.setViewModelProvider(new ViewModelProvider(/* owner= */this));
                    mHomeCardModules.add(cardModule);
                    if (DEBUG) {
                        long reflectionTime = System.currentTimeMillis() - reflectionStartTime;
                        Log.d(TAG, "Initialization of HomeCardModule class " + providerClassName
                                + " took " + reflectionTime + " ms");
                    }
                } catch (IllegalAccessException | InstantiationException
                        | ClassNotFoundException e) {
                    Log.w(TAG, "Unable to create HomeCardProvider class " + providerClassName, e);
                }
            }
        }
        FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
        for (HomeCardModule cardModule : mHomeCardModules) {
            transaction.replace(cardModule.getCardResId(), cardModule.getCardView().getFragment());
        }
        transaction.commitNow();
    }
}