from unittest.mock import patch

import cv2
import pytest
from tests.assert_helper import get_test_example_file, get_test_examples_directory

from facefusion import state_manager
from facefusion.codecs.vpx_decoder import create, decode, destroy
from facefusion.codecs.vpx_encoder import create as create_encoder, encode
from facefusion.common_helper import is_macos
from facefusion.download import conditional_download
from facefusion.hash_helper import create_hash
from facefusion.libraries import vpx as vpx_module
from facefusion.vision import read_video_frame


@pytest.fixture(scope = 'module', autouse = True)
def before_all() -> None:
	state_manager.init_item('download_providers', [ 'github', 'huggingface' ])

	conditional_download(get_test_examples_directory(), [ 'https://github.com/facefusion/facefusion-assets/releases/download/examples-3.0.0/target-240p.mp4' ])

	vpx_module.pre_check()


def test_create() -> None:
	assert create(1)

	with patch('facefusion.codecs.vpx_decoder.vpx_module.create_static_library', return_value = None):
		assert create(1) is None


def test_decode() -> None:
	vision_frame = read_video_frame(get_test_example_file('target-240p.mp4'))
	video_buffer = cv2.cvtColor(vision_frame, cv2.COLOR_BGR2YUV_I420).tobytes()
	video_resolution = (vision_frame.shape[1], vision_frame.shape[0])
	vpx_encoder = create_encoder(video_resolution, 1000, 1, 0)
	encoded_buffer = encode(vpx_encoder, video_buffer, video_resolution, 0)
	vpx_pointer = decode(create(1), encoded_buffer)

	assert vpx_pointer is not None
	assert vpx_pointer.get('resolution') == video_resolution
	assert len(vpx_pointer.get('buffer')) == video_resolution[0] * video_resolution[1] * 3 // 2
	assert decode(create(1), bytes()) is None

	if is_macos():
		assert create_hash(bytes(vpx_pointer.get('buffer'))) == '87450f70'


def test_destroy() -> None:
	vpx_decoder = create(1)

	with patch.object(vpx_module.create_static_library(), 'vpx_codec_destroy') as mock:
		destroy(vpx_decoder)
		mock.assert_called_once_with(vpx_decoder)