from typing import List, Optional
import glob
import os
import shutil
import tempfile
import filetype
from pathlib import Path

import facefusion.globals

TEMP_DIRECTORY_PATH = os.path.join(tempfile.gettempdir(), 'facefusion')
TEMP_OUTPUT_VIDEO_NAME = 'temp.mp4'


def get_temp_frame_paths(target_path : str) -> List[str]:
	temp_frames_pattern = get_temp_frames_pattern(target_path, '*')
	return sorted(glob.glob(temp_frames_pattern))


def get_temp_frames_pattern(target_path : str, temp_frame_prefix : str) -> str:
	temp_directory_path = get_temp_directory_path(target_path)
	return os.path.join(temp_directory_path, temp_frame_prefix + '.' + facefusion.globals.temp_frame_format)


def get_temp_directory_path(target_path : str) -> str:
	target_name, _ = os.path.splitext(os.path.basename(target_path))
	return os.path.join(TEMP_DIRECTORY_PATH, target_name)


def get_temp_output_video_path(target_path : str) -> str:
	temp_directory_path = get_temp_directory_path(target_path)
	return os.path.join(temp_directory_path, TEMP_OUTPUT_VIDEO_NAME)


def create_temp(target_path : str) -> None:
	temp_directory_path = get_temp_directory_path(target_path)
	Path(temp_directory_path).mkdir(parents = True, exist_ok = True)


def move_temp(target_path : str, output_path : str) -> None:
	temp_output_video_path = get_temp_output_video_path(target_path)
	if is_file(temp_output_video_path):
		if is_file(output_path):
			os.remove(output_path)
		shutil.move(temp_output_video_path, output_path)


def clear_temp(target_path : str) -> None:
	temp_directory_path = get_temp_directory_path(target_path)
	parent_directory_path = os.path.dirname(temp_directory_path)
	if not facefusion.globals.keep_temp and is_directory(temp_directory_path):
		shutil.rmtree(temp_directory_path)
	if os.path.exists(parent_directory_path) and not os.listdir(parent_directory_path):
		os.rmdir(parent_directory_path)


def is_file(file_path : str) -> bool:
	return bool(file_path and os.path.isfile(file_path))


def is_directory(directory_path : str) -> bool:
	return bool(directory_path and os.path.isdir(directory_path))


def is_image(image_path : str) -> bool:
	if is_file(image_path):
		return filetype.helpers.is_image(image_path)
	return False


def are_images(image_paths : List[str]) -> bool:
	if image_paths:
		return all(is_image(image_path) for image_path in image_paths)
	return False


def is_video(video_path : str) -> bool:
	if is_file(video_path):
		return filetype.helpers.is_video(video_path)
	return False


def resolve_relative_path(path : str) -> str:
	return os.path.abspath(os.path.join(os.path.dirname(__file__), path))


def list_directory(directory_path : str) -> Optional[List[str]]:
	if is_directory(directory_path):
		files = os.listdir(directory_path)
		return [ Path(file).stem for file in files if not Path(file).stem.startswith(('.', '__')) ]
	return None