from typing import Any, Dict, Tuple, Optional
import gradio

import facefusion.globals
from facefusion import wording
from facefusion.vision import count_video_frame_total
from facefusion.filesystem import is_video
from facefusion.uis.core import get_ui_component

TRIM_FRAME_START_SLIDER : Optional[gradio.Slider] = None
TRIM_FRAME_END_SLIDER : Optional[gradio.Slider] = None


def render() -> None:
	global TRIM_FRAME_START_SLIDER
	global TRIM_FRAME_END_SLIDER

	trim_frame_start_slider_args : Dict[str, Any] =\
	{
		'label': wording.get('trim_frame_start_slider_label'),
		'step': 1,
		'minimum': 0,
		'maximum': 100,
		'visible': False
	}
	trim_frame_end_slider_args : Dict[str, Any] =\
	{
		'label': wording.get('trim_frame_end_slider_label'),
		'step': 1,
		'minimum': 0,
		'maximum': 100,
		'visible': False
	}
	if is_video(facefusion.globals.target_path):
		video_frame_total = count_video_frame_total(facefusion.globals.target_path)
		trim_frame_start_slider_args['value'] = facefusion.globals.trim_frame_start or 0
		trim_frame_start_slider_args['maximum'] = video_frame_total
		trim_frame_start_slider_args['visible'] = True
		trim_frame_end_slider_args['value'] = facefusion.globals.trim_frame_end or video_frame_total
		trim_frame_end_slider_args['maximum'] = video_frame_total
		trim_frame_end_slider_args['visible'] = True
	with gradio.Row():
		TRIM_FRAME_START_SLIDER = gradio.Slider(**trim_frame_start_slider_args)
		TRIM_FRAME_END_SLIDER = gradio.Slider(**trim_frame_end_slider_args)


def listen() -> None:
	TRIM_FRAME_START_SLIDER.change(update_trim_frame_start, inputs = TRIM_FRAME_START_SLIDER)
	TRIM_FRAME_END_SLIDER.change(update_trim_frame_end, inputs = TRIM_FRAME_END_SLIDER)
	target_video = get_ui_component('target_video')
	if target_video:
		for method in [ 'upload', 'change', 'clear' ]:
			getattr(target_video, method)(remote_update, outputs = [ TRIM_FRAME_START_SLIDER, TRIM_FRAME_END_SLIDER ])


def remote_update() -> Tuple[gradio.Slider, gradio.Slider]:
	if is_video(facefusion.globals.target_path):
		video_frame_total = count_video_frame_total(facefusion.globals.target_path)
		facefusion.globals.trim_frame_start = None
		facefusion.globals.trim_frame_end = None
		return gradio.Slider(value = 0, maximum = video_frame_total, visible = True), gradio.Slider(value = video_frame_total, maximum = video_frame_total, visible = True)
	return gradio.Slider(value = None, maximum = None, visible = False), gradio.Slider(value = None, maximum = None, visible = False)


def update_trim_frame_start(trim_frame_start : int) -> None:
	facefusion.globals.trim_frame_start = trim_frame_start if trim_frame_start > 0 else None


def update_trim_frame_end(trim_frame_end : int) -> None:
	video_frame_total = count_video_frame_total(facefusion.globals.target_path)
	facefusion.globals.trim_frame_end = trim_frame_end if trim_frame_end < video_frame_total else None