/*
 * Copyright (C) 2017 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.bluetooth.le;

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

import java.util.Objects;

/** PeriodicAdvertisingReport for Bluetooth LE synchronized advertising. */
@Hide
public final class PeriodicAdvertisingReport implements Parcelable {

    /** The data returned is complete */
    public static final int DATA_COMPLETE = 0;

    /**
     * The data returned is incomplete. The controller was unsuccessful to receive all chained
     * packets, returning only partial data.
     */
    public static final int DATA_INCOMPLETE_TRUNCATED = 2;

    private int mSyncHandle;
    private int mTxPower;
    private int mRssi;
    private int mDataStatus;

    // periodic advertising data.
    @Nullable private ScanRecord mData;

    // Device timestamp when the result was last seen.
    private long mTimestampNanos;

    /** Constructor of periodic advertising result. */
    public PeriodicAdvertisingReport(
            int syncHandle, int txPower, int rssi, int dataStatus, ScanRecord data) {
        mSyncHandle = syncHandle;
        mTxPower = txPower;
        mRssi = rssi;
        mDataStatus = dataStatus;
        mData = data;
    }

    private PeriodicAdvertisingReport(Parcel in) {
        readFromParcel(in);
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(mSyncHandle);
        dest.writeInt(mTxPower);
        dest.writeInt(mRssi);
        dest.writeInt(mDataStatus);
        if (mData != null) {
            dest.writeInt(1);
            dest.writeByteArray(mData.getBytes());
        } else {
            dest.writeInt(0);
        }
    }

    private void readFromParcel(Parcel in) {
        mSyncHandle = in.readInt();
        mTxPower = in.readInt();
        mRssi = in.readInt();
        mDataStatus = in.readInt();
        if (in.readInt() == 1) {
            mData = ScanRecord.parseFromBytes(in.createByteArray());
        }
    }

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

    /** Returns the synchronization handle. */
    @RequiresNoPermission
    public int getSyncHandle() {
        return mSyncHandle;
    }

    /**
     * Returns the transmit power in dBm. The valid range is [-127, 126]. Value of 127 means
     * information was not available.
     */
    @RequiresNoPermission
    public int getTxPower() {
        return mTxPower;
    }

    /** Returns the received signal strength in dBm. The valid range is [-127, 20]. */
    @RequiresNoPermission
    public int getRssi() {
        return mRssi;
    }

    /**
     * Returns the data status. Can be one of {@link PeriodicAdvertisingReport#DATA_COMPLETE} or
     * {@link PeriodicAdvertisingReport#DATA_INCOMPLETE_TRUNCATED}.
     */
    @RequiresNoPermission
    public int getDataStatus() {
        return mDataStatus;
    }

    /** Returns the data contained in this periodic advertising report. */
    @RequiresNoPermission
    public @Nullable ScanRecord getData() {
        return mData;
    }

    /** Returns timestamp since boot when the scan record was observed. */
    @RequiresNoPermission
    public long getTimestampNanos() {
        return mTimestampNanos;
    }

    @Override
    public int hashCode() {
        return Objects.hash(mSyncHandle, mTxPower, mRssi, mDataStatus, mData, mTimestampNanos);
    }

    @Override
    public boolean equals(@Nullable Object obj) {
        if (this == obj) {
            return true;
        }
        if (obj == null || getClass() != obj.getClass()) {
            return false;
        }
        PeriodicAdvertisingReport other = (PeriodicAdvertisingReport) obj;
        return (mSyncHandle == other.mSyncHandle)
                && (mTxPower == other.mTxPower)
                && (mRssi == other.mRssi)
                && (mDataStatus == other.mDataStatus)
                && Objects.equals(mData, other.mData)
                && (mTimestampNanos == other.mTimestampNanos);
    }

    @Override
    public String toString() {
        return ("PeriodicAdvertisingReport [syncHandle=" + mSyncHandle)
                + (", txPower=" + mTxPower)
                + (", rssi=" + mRssi)
                + (", dataStatus=" + mDataStatus)
                + (", data=" + Objects.toString(mData))
                + (", timestampNanos=" + mTimestampNanos + "]");
    }

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

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