import tempfile
from typing import Tuple, Optional
import gradio

import facefusion.globals
from facefusion import wording
from facefusion.core import limit_resources, conditional_process
from facefusion.uis.typing import Update
from facefusion.utilities import is_image, is_video, normalize_output_path, clear_temp

OUTPUT_IMAGE : Optional[gradio.Image] = None
OUTPUT_VIDEO : Optional[gradio.Video] = None
OUTPUT_PATH_TEXTBOX : Optional[gradio.Textbox] = None
OUTPUT_START_BUTTON : Optional[gradio.Button] = None
OUTPUT_CLEAR_BUTTON : Optional[gradio.Button] = None


def render() -> None:
	global OUTPUT_IMAGE
	global OUTPUT_VIDEO
	global OUTPUT_PATH_TEXTBOX
	global OUTPUT_START_BUTTON
	global OUTPUT_CLEAR_BUTTON

	with gradio.Row():
		with gradio.Box():
			OUTPUT_IMAGE = gradio.Image(
				label = wording.get('output_image_or_video_label'),
				visible = False
			)
			OUTPUT_VIDEO = gradio.Video(
				label = wording.get('output_image_or_video_label')
			)
			OUTPUT_PATH_TEXTBOX = gradio.Textbox(
				label = wording.get('output_path_textbox_label'),
				value = facefusion.globals.output_path or tempfile.gettempdir(),
				max_lines = 1
			)
	with gradio.Row():
		OUTPUT_START_BUTTON = gradio.Button(wording.get('start_button_label'))
		OUTPUT_CLEAR_BUTTON = gradio.Button(wording.get('clear_button_label'))


def listen() -> None:
	OUTPUT_PATH_TEXTBOX.change(update_output_path, inputs = OUTPUT_PATH_TEXTBOX, outputs = OUTPUT_PATH_TEXTBOX)
	OUTPUT_START_BUTTON.click(start, inputs = OUTPUT_PATH_TEXTBOX, outputs = [ OUTPUT_IMAGE, OUTPUT_VIDEO ])
	OUTPUT_CLEAR_BUTTON.click(clear, outputs = [ OUTPUT_IMAGE, OUTPUT_VIDEO ])


def start(output_path : str) -> Tuple[Update, Update]:
	facefusion.globals.output_path = normalize_output_path(facefusion.globals.source_path, facefusion.globals.target_path, output_path)
	limit_resources()
	conditional_process()
	if is_image(facefusion.globals.output_path):
		return gradio.update(value = facefusion.globals.output_path, visible = True), gradio.update(value = None, visible = False)
	if is_video(facefusion.globals.output_path):
		return gradio.update(value = None, visible = False), gradio.update(value = facefusion.globals.output_path, visible = True)
	return gradio.update(), gradio.update()


def update_output_path(output_path : str) -> Update:
	facefusion.globals.output_path = output_path
	return gradio.update(value = output_path)


def clear() -> Tuple[Update, Update]:
	if facefusion.globals.target_path:
		clear_temp(facefusion.globals.target_path)
	return gradio.update(value = None), gradio.update(value = None)