from typing import Optional, Tuple

from gradio_rangeslider import RangeSlider

from facefusion import state_manager, wording
from facefusion.face_store import clear_static_faces
from facefusion.filesystem import is_video
from facefusion.uis.core import get_ui_components
from facefusion.uis.typing import ComponentOptions
from facefusion.vision import count_video_frame_total

TRIM_FRAME_RANGE_SLIDER : Optional[RangeSlider] = None


def render() -> None:
	global TRIM_FRAME_RANGE_SLIDER

	trim_frame_range_slider_options : ComponentOptions =\
	{
		'label': wording.get('uis.trim_frame_slider'),
		'minimum': 0,
		'step': 1,
		'visible': False
	}
	if is_video(state_manager.get_item('target_path')):
		video_frame_total = count_video_frame_total(state_manager.get_item('target_path'))
		trim_frame_start = state_manager.get_item('trim_frame_start') or 0
		trim_frame_end = state_manager.get_item('trim_frame_end') or video_frame_total
		trim_frame_range_slider_options['maximum'] = video_frame_total
		trim_frame_range_slider_options['value'] = (trim_frame_start, trim_frame_end)
		trim_frame_range_slider_options['visible'] = True
	TRIM_FRAME_RANGE_SLIDER = RangeSlider(**trim_frame_range_slider_options)


def listen() -> None:
	TRIM_FRAME_RANGE_SLIDER.release(update_trim_frame, inputs = TRIM_FRAME_RANGE_SLIDER)
	for ui_component in get_ui_components(
	[
		'target_image',
		'target_video'
	]):
		for method in [ 'upload', 'change', 'clear' ]:
			getattr(ui_component, method)(remote_update, outputs = [ TRIM_FRAME_RANGE_SLIDER ])


def remote_update() -> RangeSlider:
	if is_video(state_manager.get_item('target_path')):
		video_frame_total = count_video_frame_total(state_manager.get_item('target_path'))
		state_manager.clear_item('trim_frame_start')
		state_manager.clear_item('trim_frame_end')
		return RangeSlider(value = (0, video_frame_total), maximum = video_frame_total, visible = True)
	return RangeSlider(visible = False)


def update_trim_frame(trim_frame : Tuple[float, float]) -> None:
	clear_static_faces()
	trim_frame_start, trim_frame_end = trim_frame
	video_frame_total = count_video_frame_total(state_manager.get_item('target_path'))
	trim_frame_start = int(trim_frame_start) if trim_frame_start > 0 else None
	trim_frame_end = int(trim_frame_end) if trim_frame_end < video_frame_total else None
	state_manager.set_item('trim_frame_start', trim_frame_start)
	state_manager.set_item('trim_frame_end', trim_frame_end)