from typing import Optional
import gradio

import facefusion.globals
import facefusion.choices
from facefusion.typing import VideoMemoryStrategy
from facefusion import wording

VIDEO_MEMORY_STRATEGY : Optional[gradio.Dropdown] = None
SYSTEM_MEMORY_LIMIT_SLIDER : Optional[gradio.Slider] = None


def render() -> None:
	global VIDEO_MEMORY_STRATEGY
	global SYSTEM_MEMORY_LIMIT_SLIDER

	VIDEO_MEMORY_STRATEGY = gradio.Dropdown(
		label = wording.get('video_memory_strategy_dropdown_label'),
		choices = facefusion.choices.video_memory_strategies,
		value = facefusion.globals.video_memory_strategy
	)
	SYSTEM_MEMORY_LIMIT_SLIDER = gradio.Slider(
		label = wording.get('system_memory_limit_slider_label'),
		step =facefusion.choices.system_memory_limit_range[1] - facefusion.choices.system_memory_limit_range[0],
		minimum = facefusion.choices.system_memory_limit_range[0],
		maximum = facefusion.choices.system_memory_limit_range[-1],
		value = facefusion.globals.system_memory_limit
	)


def listen() -> None:
	VIDEO_MEMORY_STRATEGY.change(update_video_memory_strategy, inputs = VIDEO_MEMORY_STRATEGY)
	SYSTEM_MEMORY_LIMIT_SLIDER.change(update_system_memory_limit, inputs = SYSTEM_MEMORY_LIMIT_SLIDER)


def update_video_memory_strategy(video_memory_strategy : VideoMemoryStrategy) -> None:
	facefusion.globals.video_memory_strategy = video_memory_strategy


def update_system_memory_limit(system_memory_limit : int) -> None:
	facefusion.globals.system_memory_limit = system_memory_limit