/*
 * Copyright (C) 2022 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.oemcarservice.testapp;

import android.car.oem.OemCarAudioDuckingService;
import android.car.oem.OemCarAudioVolumeRequest;
import android.content.Context;
import android.media.AudioAttributes;
import android.util.ArrayMap;
import android.util.Log;
import android.util.Slog;

import androidx.annotation.NonNull;

import com.android.car.oem.ducking.DuckingInteractions;
import com.android.car.oem.utils.OemCarServiceHelper;

import org.xmlpull.v1.XmlPullParserException;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.List;

final class OemCarAudioDuckingServiceImpl implements OemCarAudioDuckingService {

    private static final String TAG = "OemCarAudioDuckingSrv";
    private static final boolean DEBUG = Log.isLoggable(TAG, Log.DEBUG);

    private final DuckingInteractions mDuckingInteractions;

    /**
     * Constructs a {@link DuckingInteractions} with the given ducking interactions, if
     * the given ducking interactions is null it will use the default ducking interactions set in
     * {@link DuckingInteractions#getDefaultDuckingInteractions()}
     *
     * @param duckingInteractions A mapping from one AudioAttributes to a list of AudioAttributes
     *        to be ducked.
     */
    OemCarAudioDuckingServiceImpl(Context context) {
        ArrayMap<AudioAttributes, List<AudioAttributes>> duckingInteractionsMapping =
                parseAndGetDuckingConfig(context);
        if (duckingInteractionsMapping == null) {
            duckingInteractionsMapping = DuckingInteractions.DEFAULT_INTERACTION;
        }
        mDuckingInteractions = new DuckingInteractions(duckingInteractionsMapping);
        if (DEBUG) {
            Slog.d(TAG, "constructor");
        }
    }

    @NonNull
    @Override
    public List<AudioAttributes> evaluateAttributesToDuck(
            @NonNull OemCarAudioVolumeRequest requestInfo) {
        return mDuckingInteractions.getDuckedAudioAttributes(requestInfo);
    }

    @Override
    public void init() {
        if (DEBUG) {
            Slog.d(TAG, "init");
        }
    }

    @Override
    public void release() {
        if (DEBUG) {
            Slog.d(TAG, "release");
        }
    }

    @Override
    public void onCarServiceReady() {
        if (DEBUG) {
            Slog.d(TAG, "onCarServiceReady");
        }
        // Do any CarService calls
    }

    @Override
    public void dump(PrintWriter writer, String[] args) {
        if (DEBUG) {
            Slog.d(TAG, "dump");
        }
        writer.println("  OemCarAudioDuckingServiceImpl");
        mDuckingInteractions.dump(writer, "  ");
    }

    private ArrayMap<AudioAttributes, List<AudioAttributes>> parseAndGetDuckingConfig(
            Context context) {
        OemCarServiceHelper oemCarServiceHelper = new OemCarServiceHelper();
        try {
            oemCarServiceHelper.parseAudioManagementConfiguration(context.getAssets().open(
                    "oem_ducking_config.xml"));
            return oemCarServiceHelper.getDuckingInteractions();
        } catch (XmlPullParserException | IOException e) {
            Slog.w(TAG, "Ducking config file was not able to be parsed", e);
            return null;
        }
    }
}