/*
 * Copyright (C) 2018 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.telephony.ims;

import android.annotation.SystemApi;
import android.net.Uri;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.os.RemoteException;
import android.telecom.Connection;
import android.telecom.VideoProfile;
import android.telecom.VideoProfile.CameraCapabilities;
import android.view.Surface;

import com.android.ims.internal.IImsVideoCallCallback;
import com.android.ims.internal.IImsVideoCallProvider;
import com.android.internal.os.SomeArgs;

@hide
/**
 * @hide
 */
@SystemApi
public abstract class ImsVideoCallProvider {
    private static final int MSG_SET_CALLBACK = 1;
    private static final int MSG_SET_CAMERA = 2;
    private static final int MSG_SET_PREVIEW_SURFACE = 3;
    private static final int MSG_SET_DISPLAY_SURFACE = 4;
    private static final int MSG_SET_DEVICE_ORIENTATION = 5;
    private static final int MSG_SET_ZOOM = 6;
    private static final int MSG_SEND_SESSION_MODIFY_REQUEST = 7;
    private static final int MSG_SEND_SESSION_MODIFY_RESPONSE = 8;
    private static final int MSG_REQUEST_CAMERA_CAPABILITIES = 9;
    private static final int MSG_REQUEST_CALL_DATA_USAGE = 10;
    private static final int MSG_SET_PAUSE_IMAGE = 11;

    private final ImsVideoCallProviderBinder mBinder;

    private IImsVideoCallCallback mCallback;

    
Default handler used to consolidate binder method calls onto a single thread.
/**
     * Default handler used to consolidate binder method calls onto a single thread.
     */
    private final Handler mProviderHandler = new Handler(Looper.getMainLooper()) {
        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case MSG_SET_CALLBACK:
                    mCallback = (IImsVideoCallCallback) msg.obj;
                    break;
                case MSG_SET_CAMERA:
                {
                    SomeArgs args = (SomeArgs) msg.obj;
                    try {
                        onSetCamera((String) args.arg1);
                        onSetCamera((String) args.arg1, args.argi1);
                    } finally {
                        args.recycle();
                    }
                    break;
                }
                case MSG_SET_PREVIEW_SURFACE:
                    onSetPreviewSurface((Surface) msg.obj);
                    break;
                case MSG_SET_DISPLAY_SURFACE:
                    onSetDisplaySurface((Surface) msg.obj);
                    break;
                case MSG_SET_DEVICE_ORIENTATION:
                    onSetDeviceOrientation(msg.arg1);
                    break;
                case MSG_SET_ZOOM:
                    onSetZoom((Float) msg.obj);
                    break;
                case MSG_SEND_SESSION_MODIFY_REQUEST: {
                    SomeArgs args = (SomeArgs) msg.obj;
                    try {
                        VideoProfile fromProfile = (VideoProfile) args.arg1;
                        VideoProfile toProfile = (VideoProfile) args.arg2;

                        onSendSessionModifyRequest(fromProfile, toProfile);
                    } finally {
                        args.recycle();
                    }
                    break;
                }
                case MSG_SEND_SESSION_MODIFY_RESPONSE:
                    onSendSessionModifyResponse((VideoProfile) msg.obj);
                    break;
                case MSG_REQUEST_CAMERA_CAPABILITIES:
                    onRequestCameraCapabilities();
                    break;
                case MSG_REQUEST_CALL_DATA_USAGE:
                    onRequestCallDataUsage();
                    break;
                case MSG_SET_PAUSE_IMAGE:
                    onSetPauseImage((Uri) msg.obj);
                    break;
                default:
                    break;
            }
        }
    };

    
IImsVideoCallProvider stub implementation.
/**
     * IImsVideoCallProvider stub implementation.
     */
    private final class ImsVideoCallProviderBinder extends IImsVideoCallProvider.Stub {
        public void setCallback(IImsVideoCallCallback callback) {
            mProviderHandler.obtainMessage(MSG_SET_CALLBACK, callback).sendToTarget();
        }

        public void setCamera(String cameraId, int uid) {
            SomeArgs args = SomeArgs.obtain();
            args.arg1 = cameraId;
            args.argi1 = uid;
            mProviderHandler.obtainMessage(MSG_SET_CAMERA, args).sendToTarget();
        }

        public void setPreviewSurface(Surface surface) {
            mProviderHandler.obtainMessage(MSG_SET_PREVIEW_SURFACE, surface).sendToTarget();
        }

        public void setDisplaySurface(Surface surface) {
            mProviderHandler.obtainMessage(MSG_SET_DISPLAY_SURFACE, surface).sendToTarget();
        }

        public void setDeviceOrientation(int rotation) {
            mProviderHandler.obtainMessage(MSG_SET_DEVICE_ORIENTATION, rotation, 0).sendToTarget();
        }

        public void setZoom(float value) {
            mProviderHandler.obtainMessage(MSG_SET_ZOOM, value).sendToTarget();
        }

        public void sendSessionModifyRequest(VideoProfile fromProfile, VideoProfile toProfile) {
            SomeArgs args = SomeArgs.obtain();
            args.arg1 = fromProfile;
            args.arg2 = toProfile;
            mProviderHandler.obtainMessage(MSG_SEND_SESSION_MODIFY_REQUEST, args).sendToTarget();
        }

        public void sendSessionModifyResponse(VideoProfile responseProfile) {
            mProviderHandler.obtainMessage(
                    MSG_SEND_SESSION_MODIFY_RESPONSE, responseProfile).sendToTarget();
        }

        public void requestCameraCapabilities() {
            mProviderHandler.obtainMessage(MSG_REQUEST_CAMERA_CAPABILITIES).sendToTarget();
        }

        public void requestCallDataUsage() {
            mProviderHandler.obtainMessage(MSG_REQUEST_CALL_DATA_USAGE).sendToTarget();
        }

        public void setPauseImage(Uri uri) {
            mProviderHandler.obtainMessage(MSG_SET_PAUSE_IMAGE, uri).sendToTarget();
        }
    }

    public ImsVideoCallProvider() {
        mBinder = new ImsVideoCallProviderBinder();
    }

    
Returns binder object which can be used across IPC methods.
@hide
/**
     * Returns binder object which can be used across IPC methods.
     * @hide
     */
    public final IImsVideoCallProvider getInterface() {
        return mBinder;
    }

    
See Also:
VideoProvider.onSetCamera/** @see Connection.VideoProvider#onSetCamera */
    public abstract void onSetCamera(String cameraId);

    
Similar to onSetCamera(String), except includes the UID of the calling process which the IMS service uses when opening the camera. This ensures camera permissions are verified by the camera service. 
Params:
cameraId – The id of the camera to be opened.
uid – The uid of the caller, used when opening the camera for permission verification.
See Also:
VideoProvider.onSetCamera/**
     * Similar to {@link #onSetCamera(String)}, except includes the UID of the calling process which
     * the IMS service uses when opening the camera.  This ensures camera permissions are verified
     * by the camera service.
     *
     * @param cameraId The id of the camera to be opened.
     * @param uid The uid of the caller, used when opening the camera for permission verification.
     * @see Connection.VideoProvider#onSetCamera
     */
    public void onSetCamera(String cameraId, int uid) {
    }

    
See Also:
VideoProvider.onSetPreviewSurface/** @see Connection.VideoProvider#onSetPreviewSurface */
    public abstract void onSetPreviewSurface(Surface surface);

    
See Also:
VideoProvider.onSetDisplaySurface/** @see Connection.VideoProvider#onSetDisplaySurface */
    public abstract void onSetDisplaySurface(Surface surface);

    
See Also:
VideoProvider.onSetDeviceOrientation/** @see Connection.VideoProvider#onSetDeviceOrientation */
    public abstract void onSetDeviceOrientation(int rotation);

    
See Also:
VideoProvider.onSetZoom/** @see Connection.VideoProvider#onSetZoom */
    public abstract void onSetZoom(float value);

    
See Also:
VideoProvider.onSendSessionModifyRequest/** @see Connection.VideoProvider#onSendSessionModifyRequest */
    public abstract void onSendSessionModifyRequest(VideoProfile fromProfile,
            VideoProfile toProfile);

    
See Also:
VideoProvider.onSendSessionModifyResponse/** @see Connection.VideoProvider#onSendSessionModifyResponse */
    public abstract void onSendSessionModifyResponse(VideoProfile responseProfile);

    
See Also:
VideoProvider.onRequestCameraCapabilities/** @see Connection.VideoProvider#onRequestCameraCapabilities */
    public abstract void onRequestCameraCapabilities();

    
See Also:
VideoProvider.onRequestCallDataUsage/** @see Connection.VideoProvider#onRequestCallDataUsage */
    public abstract void onRequestCallDataUsage();

    
See Also:
VideoProvider.onSetPauseImage/** @see Connection.VideoProvider#onSetPauseImage */
    public abstract void onSetPauseImage(Uri uri);

    
See Also:
VideoProvider.receiveSessionModifyRequest/** @see Connection.VideoProvider#receiveSessionModifyRequest */
    public void receiveSessionModifyRequest(VideoProfile VideoProfile) {
        if (mCallback != null) {
            try {
                mCallback.receiveSessionModifyRequest(VideoProfile);
            } catch (RemoteException ignored) {
            }
        }
    }

    
See Also:
VideoProvider.receiveSessionModifyResponse/** @see Connection.VideoProvider#receiveSessionModifyResponse */
    public void receiveSessionModifyResponse(
            int status, VideoProfile requestedProfile, VideoProfile responseProfile) {
        if (mCallback != null) {
            try {
                mCallback.receiveSessionModifyResponse(status, requestedProfile, responseProfile);
            } catch (RemoteException ignored) {
            }
        }
    }

    
See Also:
VideoProvider.handleCallSessionEvent/** @see Connection.VideoProvider#handleCallSessionEvent */
    public void handleCallSessionEvent(int event) {
        if (mCallback != null) {
            try {
                mCallback.handleCallSessionEvent(event);
            } catch (RemoteException ignored) {
            }
        }
    }

    
See Also:
VideoProvider.changePeerDimensions/** @see Connection.VideoProvider#changePeerDimensions */
    public void changePeerDimensions(int width, int height) {
        if (mCallback != null) {
            try {
                mCallback.changePeerDimensions(width, height);
            } catch (RemoteException ignored) {
            }
        }
    }

    
See Also:
VideoProvider.changeCallDataUsage/** @see Connection.VideoProvider#changeCallDataUsage */
    public void changeCallDataUsage(long dataUsage) {
        if (mCallback != null) {
            try {
                mCallback.changeCallDataUsage(dataUsage);
            } catch (RemoteException ignored) {
            }
        }
    }

    
See Also:
VideoProvider.changeCameraCapabilities/** @see Connection.VideoProvider#changeCameraCapabilities */
    public void changeCameraCapabilities(CameraCapabilities CameraCapabilities) {
        if (mCallback != null) {
            try {
                mCallback.changeCameraCapabilities(CameraCapabilities);
            } catch (RemoteException ignored) {
            }
        }
    }

    
See Also:
VideoProvider.changeVideoQuality/** @see Connection.VideoProvider#changeVideoQuality */
    public void changeVideoQuality(int videoQuality) {
        if (mCallback != null) {
            try {
                mCallback.changeVideoQuality(videoQuality);
            } catch (RemoteException ignored) {
            }
        }
    }
}