/*
 * 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 android.media.tv;

import android.annotation.NonNull;
import android.annotation.Nullable;
import android.os.Parcel;
import android.os.Parcelable;

/**
 * A response for Stream Event from broadcast signal.
 */
public final class StreamEventResponse extends BroadcastInfoResponse implements Parcelable {
    private static final @TvInputManager.BroadcastInfoType int RESPONSE_TYPE =
            TvInputManager.BROADCAST_INFO_STREAM_EVENT;

    public static final @NonNull Parcelable.Creator<StreamEventResponse> CREATOR =
            new Parcelable.Creator<StreamEventResponse>() {
                @Override
                public StreamEventResponse createFromParcel(Parcel source) {
                    source.readInt();
                    return createFromParcelBody(source);
                }

                @Override
                public StreamEventResponse[] newArray(int size) {
                    return new StreamEventResponse[size];
                }
            };

    private final int mEventId;
    private final long mNptMillis;
    private final byte[] mData;

    static StreamEventResponse createFromParcelBody(Parcel in) {
        return new StreamEventResponse(in);
    }

    public StreamEventResponse(int requestId, int sequence, @ResponseResult int responseResult,
            int eventId, long nptMillis, @Nullable byte[] data) {
        super(RESPONSE_TYPE, requestId, sequence, responseResult);
        mEventId = eventId;
        mNptMillis = nptMillis;
        mData = data;
    }

    private StreamEventResponse(@NonNull Parcel source) {
        super(RESPONSE_TYPE, source);
        mEventId = source.readInt();
        mNptMillis = source.readLong();
        int dataLength = source.readInt();
        if (dataLength > 0) {
            mData = new byte[dataLength];
            source.readByteArray(mData);
        } else {
            mData = null;
        }
    }

    /**
     * Returns the event ID.
     */
    public int getEventId() {
        return mEventId;
    }

    /**
     * Returns the NPT(Normal Play Time) value when the event occurred or will occur.
     * <p>The time unit of NPT is millisecond.
     */
    public long getNptMillis() {
        return mNptMillis;
    }

    /**
     * Returns the application specific data.
     */
    @Nullable
    public byte[] getData() {
        return mData;
    }

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(@NonNull Parcel dest, int flags) {
        super.writeToParcel(dest, flags);
        dest.writeInt(mEventId);
        dest.writeLong(mNptMillis);
        if (mData != null && mData.length > 0) {
            dest.writeInt(mData.length);
            dest.writeByteArray(mData);
        } else {
            dest.writeInt(0);
        }
    }
}