import cv2
import roop.globals
import ui.globals
import pyvirtualcam
import threading
import platform


cam_active = False
cam_thread = None
vcam = None


def virtualcamera(
    swap_model, streamobs, use_xseg, use_mouthrestore, cam_num, width, height
):
    from roop.ProcessOptions import ProcessOptions
    from roop.core import live_swap, get_processing_plugins

    global cam_active

    # time.sleep(2)
    print("Starting capture")
    cap = cv2.VideoCapture(
        cam_num,
        cv2.CAP_DSHOW if platform.system() != "Darwin" else cv2.CAP_AVFOUNDATION,
    )
    if not cap.isOpened():
        print("Cannot open camera")
        cap.release()
        del cap
        return

    pref_width = width
    pref_height = height
    pref_fps_in = 30
    cap.set(cv2.CAP_PROP_FRAME_WIDTH, pref_width)
    cap.set(cv2.CAP_PROP_FRAME_HEIGHT, pref_height)
    cap.set(cv2.CAP_PROP_FPS, pref_fps_in)
    cam_active = True

    # native format UYVY

    cam = None
    if streamobs:
        print("Detecting virtual cam devices")
        cam = pyvirtualcam.Camera(
            width=pref_width,
            height=pref_height,
            fps=pref_fps_in,
            fmt=pyvirtualcam.PixelFormat.BGR,
            print_fps=False,
        )
    if cam:
        print(f"Using virtual camera: {cam.device}")
        print(f"Using {cam.native_fmt}")
    else:
        print(f"Not streaming to virtual camera!")
    subsample_size = roop.globals.subsample_size

    options = ProcessOptions(
        swap_model,
        get_processing_plugins("mask_xseg" if use_xseg else None),
        roop.globals.distance_threshold,
        roop.globals.blend_ratio,
        "all",
        0,
        None,
        None,
        1,
        subsample_size,
        False,
        use_mouthrestore,
    )
    while cam_active:
        ret, frame = cap.read()
        if not ret:
            break

        if len(roop.globals.INPUT_FACESETS) > 0:
            frame = live_swap(frame, options)
        if cam:
            cam.send(frame)
            cam.sleep_until_next_frame()
        ui.globals.ui_camera_frame = frame

    if cam:
        cam.close()
    cap.release()
    print("Camera stopped")


def start_virtual_cam(
    swap_model, streamobs, use_xseg, use_mouthrestore, cam_number, resolution
):
    global cam_thread, cam_active

    if not cam_active:
        width, height = map(int, resolution.split("x"))
        cam_thread = threading.Thread(
            target=virtualcamera,
            args=[
                swap_model,
                streamobs,
                use_xseg,
                use_mouthrestore,
                cam_number,
                width,
                height,
            ],
        )
        cam_thread.start()


def stop_virtual_cam():
    global cam_active, cam_thread

    if cam_active:
        cam_active = False
        cam_thread.join()