/*
 * 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 android.app.ActivityOptions;
import android.content.Intent;
import android.content.res.Configuration;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

import androidx.annotation.NonNull;
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 com.android.car.carlauncher.homescreen.audio.IntentHandler;
import com.android.car.carlauncher.homescreen.audio.MediaLaunchHandler;
import com.android.car.carlauncher.homescreen.audio.dialer.InCallIntentRouter;
import com.android.car.carlauncher.homescreen.audio.media.MediaLaunchRouter;
import com.android.car.media.common.source.MediaSource;

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;

    private final IntentHandler mIntentHandler = new IntentHandler() {
        @Override
        public void handleIntent(Intent intent) {
            if (intent != null) {
                ActivityOptions options = ActivityOptions.makeBasic();
                startActivity(intent, options.toBundle());
            }
        }
    };

    // Used instead of IntentHandler because media apps may provide a PendingIntent instead
    private final MediaLaunchHandler mMediaMediaLaunchHandler = new MediaLaunchHandler() {
        @Override
        public void handleLaunchMedia(@NonNull MediaSource mediaSource) {
            if (DEBUG) {
                Log.d(TAG, "Launching media source " + mediaSource);
            }
            mediaSource.launchActivity(ControlBarActivity.this, ActivityOptions.makeBasic());
        }
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getTheme().applyStyle(R.style.CarLauncherActivityThemeOverlay, true);

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

        MediaLaunchRouter.getInstance().registerMediaLaunchHandler(mMediaMediaLaunchHandler);
        InCallIntentRouter.getInstance().registerInCallIntentHandler(mIntentHandler);
    }

    @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();
                    if (Flags.mediaCardFullscreen()) {
                        if (cardModule.getCardResId() == R.id.top_card) {
                            findViewById(R.id.top_card).setVisibility(View.GONE);
                        }
                    }
                    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();
    }
}