/*
 * Copyright (C) Photon Vision.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */

package jni;

import static org.junit.jupiter.api.Assertions.fail;
import static org.junit.jupiter.api.Assumptions.assumeTrue;

import java.io.IOException;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.BeforeAll;
import org.opencv.core.Mat;
import org.photonvision.jni.CscoreExtras;
import org.photonvision.jni.LibraryLoader;
import org.wpilib.hardware.hal.HAL;
import org.wpilib.util.PixelFormat;
import org.wpilib.util.RawFrame;
import org.wpilib.util.runtime.RuntimeLoader;
import org.wpilib.vision.camera.CameraServerJNI;
import org.wpilib.vision.camera.CvSink;
import org.wpilib.vision.camera.CvSource;
import org.wpilib.vision.camera.UsbCamera;
import org.wpilib.vision.stream.CameraServer;

public class CscoreExtrasTest {
    @BeforeAll
    public static void load() throws IOException {
        if (!LibraryLoader.loadWpiLibraries()) {
            fail();
        }
        RuntimeLoader.loadLibrary("photontargetingJNI");

        HAL.initialize(1000, 0);
    }

    @AfterAll
    public static void teardown() {
        HAL.shutdown();
    }

    // Skip this test for now. This doesn't work in CI anyways.
    // @Test
    public void testCaptureImage() {
        assumeTrue(CameraServerJNI.enumerateUsbCameras().length > 0);

        UsbCamera camera = CameraServer.startAutomaticCapture(2);

        camera.setVideoMode(PixelFormat.MJPEG, 1280, 720, 30);
        var cameraMode = camera.getVideoMode();

        CvSink cvSink = CameraServer.getVideo(camera);

        CvSource outputStream = CameraServer.putVideo("Detected", 640, 480);

        long lastTime = 0;
        for (long i = 0; i < 10000000; i++) {
            var frame = new RawFrame();
            frame.setInfo(
                    cameraMode.width,
                    cameraMode.height,
                    // hard-coded 3 channel
                    cameraMode.width * 3,
                    PixelFormat.BGR);
            final double CSCORE_DEFAULT_FRAME_TIMEOUT = 1.0 / 4.0;
            long time =
                    CscoreExtras.grabRawSinkFrameTimeoutLastTime(
                            cvSink.getHandle(), frame.getNativeObj(), CSCORE_DEFAULT_FRAME_TIMEOUT, lastTime);

            if (time != 0) {
                var mat = new Mat(CscoreExtras.wrapRawFrame(frame.getNativeObj()));

                System.out.println(mat);
                System.out.println(
                        "Mat is " + mat.cols() + " x " + mat.rows() + " (cols x rows) with type " + mat.type());

                outputStream.putFrame(mat);

                mat.release();
            } else {
                System.err.println("Sink produced an error...");
            }

            lastTime = time;

            frame.close();
        }

        cvSink.close();
        camera.close();
    }
}