/*
 * Copyright 2024 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 androidx.camera.camera2.internal;

import android.annotation.SuppressLint;
import android.hardware.camera2.CameraCharacteristics;
import android.util.Range;
import android.view.Surface;

import androidx.annotation.NonNull;
import androidx.camera.camera2.internal.compat.CameraAccessExceptionCompat;
import androidx.camera.camera2.internal.compat.CameraCharacteristicsCompat;
import androidx.camera.camera2.internal.compat.CameraManagerCompat;
import androidx.camera.camera2.interop.Camera2CameraInfo;
import androidx.camera.camera2.interop.ExperimentalCamera2Interop;
import androidx.camera.core.CameraInfo;
import androidx.camera.core.CameraSelector;
import androidx.camera.core.CameraState;
import androidx.camera.core.DynamicRange;
import androidx.camera.core.ExperimentalZeroShutterLag;
import androidx.camera.core.ExposureState;
import androidx.camera.core.FocusMeteringAction;
import androidx.camera.core.ZoomState;
import androidx.camera.core.impl.utils.CameraOrientationUtil;
import androidx.core.util.Preconditions;
import androidx.lifecycle.LiveData;

import java.util.Set;

@ExperimentalCamera2Interop
public class Camera2PhysicalCameraInfoImpl implements CameraInfo {

    @NonNull private final String mCameraId;
    @NonNull private final CameraCharacteristicsCompat mCameraCharacteristicsCompat;
    @NonNull private final Camera2CameraInfo mCamera2CameraInfo;

    public Camera2PhysicalCameraInfoImpl(@NonNull String cameraId,
            @NonNull CameraManagerCompat cameraManager) throws CameraAccessExceptionCompat {
        mCameraId = cameraId;
        mCameraCharacteristicsCompat = cameraManager.getCameraCharacteristicsCompat(mCameraId);
        mCamera2CameraInfo = new Camera2CameraInfo(this);
    }

    /**
     * Gets the implementation of {@link Camera2CameraInfo}.
     */
    @NonNull
    public Camera2CameraInfo getCamera2CameraInfo() {
        return mCamera2CameraInfo;
    }

    @NonNull
    public String getCameraId() {
        return mCameraId;
    }

    @NonNull
    public CameraCharacteristicsCompat getCameraCharacteristicsCompat() {
        return mCameraCharacteristicsCompat;
    }

    @Override
    public int getSensorRotationDegrees() {
        return getSensorRotationDegrees(Surface.ROTATION_0);
    }

    @Override
    public int getSensorRotationDegrees(int relativeRotation) {
        int sensorOrientation = getSensorOrientation();
        int relativeRotationDegrees =
                CameraOrientationUtil.surfaceRotationToDegrees(relativeRotation);
        // Currently this assumes that a back-facing camera is always opposite to the screen.
        // This may not be the case for all devices, so in the future we may need to handle that
        // scenario.
        final int lensFacing = getLensFacing();
        boolean isOppositeFacingScreen = CameraSelector.LENS_FACING_BACK == lensFacing;
        return CameraOrientationUtil.getRelativeImageRotation(
                relativeRotationDegrees,
                sensorOrientation,
                isOppositeFacingScreen);
    }

    @Override
    public boolean hasFlashUnit() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public LiveData<Integer> getTorchState() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public LiveData<ZoomState> getZoomState() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public ExposureState getExposureState() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public LiveData<CameraState> getCameraState() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public String getImplementationType() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public CameraSelector getCameraSelector() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @Override
    public int getLensFacing() {
        Integer lensFacing = mCameraCharacteristicsCompat.get(CameraCharacteristics.LENS_FACING);
        Preconditions.checkArgument(lensFacing != null, "Unable to get the lens facing of the "
                + "camera.");
        return LensFacingUtil.getCameraSelectorLensFacing(lensFacing);
    }

    @Override
    public float getIntrinsicZoomRatio() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @Override
    public boolean isFocusMeteringSupported(@NonNull FocusMeteringAction action) {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @SuppressLint("NullAnnotationGroup")
    @ExperimentalZeroShutterLag
    @Override
    public boolean isZslSupported() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public Set<Range<Integer>> getSupportedFrameRateRanges() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @Override
    public boolean isLogicalMultiCameraSupported() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @Override
    public boolean isPrivateReprocessingSupported() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public Set<DynamicRange> querySupportedDynamicRanges(
            @NonNull Set<DynamicRange> candidateDynamicRanges) {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    @NonNull
    @Override
    public Set<CameraInfo> getPhysicalCameraInfos() {
        throw new UnsupportedOperationException("Physical camera doesn't support this function");
    }

    int getSensorOrientation() {
        Integer sensorOrientation =
                mCameraCharacteristicsCompat.get(CameraCharacteristics.SENSOR_ORIENTATION);
        Preconditions.checkNotNull(sensorOrientation);
        return sensorOrientation;
    }
}