/*
 * Copyright (C) 2013 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;

import android.bluetooth.BluetoothDevice;

/**
 * This abstract class is used to implement {@link BluetoothGattServer} callbacks.
 */
public abstract class BluetoothGattServerCallback {

    /**
     * Callback indicating when a remote device has been connected or disconnected.
     *
     * @param device Remote device that has been connected or disconnected.
     * @param status Status of the connect or disconnect operation.
     * @param newState Returns the new connection state. Can be one of
     *                  {@link BluetoothProfile#STATE_DISCONNECTED} or
     *                  {@link BluetoothProfile#STATE_CONNECTED}
     */
    public void onConnectionStateChange(BluetoothDevice device, int status,
                                        int newState) {
    }

    /**
     * Indicates whether a local service has been added successfully.
     *
     * @param status Returns {@link BluetoothGatt#GATT_SUCCESS} if the service
     *               was added successfully.
     * @param service The service that has been added
     */
    public void onServiceAdded(int status, BluetoothGattService service) {
    }

    /**
     * A remote client has requested to read a local characteristic.
     *
     * <p>An application must call {@link BluetoothGattServer#sendResponse}
     * to complete the request.
     *
     * @param device The remote device that has requested the read operation
     * @param requestId The Id of the request
     * @param offset Offset into the value of the characteristic
     * @param characteristic Characteristic to be read
     */
    public void onCharacteristicReadRequest(BluetoothDevice device, int requestId,
                        int offset, BluetoothGattCharacteristic characteristic) {
    }

    /**
     * A remote client has requested to write to a local characteristic.
     *
     * <p>An application must call {@link BluetoothGattServer#sendResponse}
     * to complete the request.
     *
     * @param device The remote device that has requested the write operation
     * @param requestId The Id of the request
     * @param characteristic Characteristic to be written to.
     * @param preparedWrite true, if this write operation should be queued for
     *                      later execution.
     * @param responseNeeded true, if the remote device requires a response
     * @param offset The offset given for the value
     * @param value The value the client wants to assign to the characteristic
     */
    public void onCharacteristicWriteRequest(BluetoothDevice device, int requestId,
                                             BluetoothGattCharacteristic characteristic,
                                             boolean preparedWrite, boolean responseNeeded,
                                             int offset, byte[] value) {
    }

    /**
     * A remote client has requested to read a local descriptor.
     *
     * <p>An application must call {@link BluetoothGattServer#sendResponse}
     * to complete the request.
     *
     * @param device The remote device that has requested the read operation
     * @param requestId The Id of the request
     * @param offset Offset into the value of the characteristic
     * @param descriptor Descriptor to be read
     */
    public void onDescriptorReadRequest(BluetoothDevice device, int requestId,
                                        int offset, BluetoothGattDescriptor descriptor) {
    }

    /**
     * A remote client has requested to write to a local descriptor.
     *
     * <p>An application must call {@link BluetoothGattServer#sendResponse}
     * to complete the request.
     *
     * @param device The remote device that has requested the write operation
     * @param requestId The Id of the request
     * @param descriptor Descriptor to be written to.
     * @param preparedWrite true, if this write operation should be queued for
     *                      later execution.
     * @param responseNeeded true, if the remote device requires a response
     * @param offset The offset given for the value
     * @param value The value the client wants to assign to the descriptor
     */
    public void onDescriptorWriteRequest(BluetoothDevice device, int requestId,
                                         BluetoothGattDescriptor descriptor,
                                         boolean preparedWrite, boolean responseNeeded,
                                         int offset,  byte[] value) {
    }

    /**
     * Execute all pending write operations for this device.
     *
     * <p>An application must call {@link BluetoothGattServer#sendResponse}
     * to complete the request.
     *
     * @param device The remote device that has requested the write operations
     * @param requestId The Id of the request
     * @param execute Whether the pending writes should be executed (true) or
     *                cancelled (false)
     */
    public void onExecuteWrite(BluetoothDevice device, int requestId, boolean execute) {
    }

    /**
     * Callback invoked when a notification or indication has been sent to
     * a remote device.
     *
     * <p>When multiple notifications are to be sent, an application must
     * wait for this callback to be received before sending additional
     * notifications.
     *
     * @param device The remote device the notification has been sent to
     * @param status {@link BluetoothGatt#GATT_SUCCESS} if the operation was successful
     */
    public void onNotificationSent(BluetoothDevice device, int status) {
    }

    /**
     * Callback indicating the MTU for a given device connection has changed.
     *
     * <p>This callback will be invoked if a remote client has requested to change
     * the MTU for a given connection.
     *
     * @param device The remote device that requested the MTU change
     * @param mtu The new MTU size
     */
    public void onMtuChanged(BluetoothDevice device, int mtu) {
    }
}
