/*
 * Copyright (C) 2014 Samsung System LSI
 * 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.bluetooth;

import android.annotation.SuppressLint;
import android.bluetooth.BluetoothSocket;

import com.android.obex.ObexTransport;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/** Generic Obex Transport class, to be used in OBEX based Bluetooth Profiles. */
public class BluetoothObexTransport implements ObexTransport {
    private BluetoothSocket mSocket = null;

    /** Will default at the maximum packet length. */
    public static final int PACKET_SIZE_UNSPECIFIED = -1;

    private int mMaxTransmitPacketSize = PACKET_SIZE_UNSPECIFIED;
    private int mMaxReceivePacketSize = PACKET_SIZE_UNSPECIFIED;

    private boolean mIsCoverArt = false;

    public BluetoothObexTransport(BluetoothSocket socket) {
        this.mSocket = socket;
    }

    public BluetoothObexTransport(BluetoothSocket socket, int transmitSize, int receiveSize) {
        this.mSocket = socket;
        this.mMaxTransmitPacketSize = transmitSize;
        this.mMaxReceivePacketSize = receiveSize;
    }

    @Override
    public void close() throws IOException {
        mSocket.close();
    }

    @Override
    public DataInputStream openDataInputStream() throws IOException {
        return new DataInputStream(openInputStream());
    }

    @Override
    public DataOutputStream openDataOutputStream() throws IOException {
        return new DataOutputStream(openOutputStream());
    }

    @Override
    public InputStream openInputStream() throws IOException {
        return mSocket.getInputStream();
    }

    @Override
    public OutputStream openOutputStream() throws IOException {
        return mSocket.getOutputStream();
    }

    @Override
    public void connect() throws IOException {}

    @Override
    public void create() throws IOException {}

    @Override
    public void disconnect() throws IOException {}

    @Override
    public void listen() throws IOException {}

    public boolean isConnected() throws IOException {
        return true;
    }

    @Override
    public int getMaxTransmitPacketSize() {
        if (mSocket.getConnectionType() != BluetoothSocket.TYPE_L2CAP
                || (mIsCoverArt && mMaxTransmitPacketSize != PACKET_SIZE_UNSPECIFIED)) {
            return mMaxTransmitPacketSize;
        }
        return mSocket.getMaxTransmitPacketSize();
    }

    @Override
    public int getMaxReceivePacketSize() {
        if (mSocket.getConnectionType() != BluetoothSocket.TYPE_L2CAP) {
            return mMaxReceivePacketSize;
        }
        return mSocket.getMaxReceivePacketSize();
    }

    @SuppressLint("AndroidFrameworkRequiresPermission") // TODO: b/350563786
    public String getRemoteAddress() {
        if (mSocket == null) {
            return null;
        }
        String identityAddress = Utils.getBrEdrAddress(mSocket.getRemoteDevice());
        return mSocket.getConnectionType() == BluetoothSocket.TYPE_RFCOMM
                ? identityAddress
                : mSocket.getRemoteDevice().getAddress();
    }

    @Override
    public boolean isSrmSupported() {
        if (mSocket.getConnectionType() == BluetoothSocket.TYPE_L2CAP) {
            return true;
        }
        return false;
    }

    public void setConnectionForCoverArt(boolean isCoverArt) {
        mIsCoverArt = isCoverArt;
    }
}