extends Control

# Settings screen: a small set of player-facing video knobs on top of
# VideoSettings (the autoload holding + persisting them). Anti-aliasing
# applies immediately since it's a Viewport-wide setting; glow/brightness
# apply the next time an arena loads (see arena.gd), since they scale each
# arena's own tuned Environment values rather than something viewport-wide.

const MAIN_MENU_SCENE_PATH := "res://scenes/main_menu.tscn"

const AA_OPTIONS := [
	{"name": "Off", "mode": VideoSettings.AAMode.OFF},
	{"name": "FXAA", "mode": VideoSettings.AAMode.FXAA},
	{"name": "MSAA 4x", "mode": VideoSettings.AAMode.MSAA},
	{"name": "MSAA 4x + FXAA", "mode": VideoSettings.AAMode.MSAA_FXAA},
]

@onready var aa_dropdown: OptionButton = %AADropdown
@onready var glow_slider: HSlider = %GlowSlider
@onready var glow_value_label: Label = %GlowValueLabel
@onready var brightness_slider: HSlider = %BrightnessSlider
@onready var brightness_value_label: Label = %BrightnessValueLabel


func _ready() -> void:
	aa_dropdown.clear()
	var selected := 0
	for i in AA_OPTIONS.size():
		aa_dropdown.add_item(AA_OPTIONS[i]["name"])
		if AA_OPTIONS[i]["mode"] == VideoSettings.aa_mode:
			selected = i
	aa_dropdown.select(selected)

	glow_slider.value = VideoSettings.glow_scale
	brightness_slider.value = VideoSettings.brightness
	_update_glow_label()
	_update_brightness_label()


func _update_glow_label() -> void:
	glow_value_label.text = "%d%%" % roundi(glow_slider.value * 100.0)


func _update_brightness_label() -> void:
	brightness_value_label.text = "%d%%" % roundi(brightness_slider.value * 100.0)


func _on_aa_dropdown_item_selected(index: int) -> void:
	VideoSettings.aa_mode = AA_OPTIONS[index]["mode"]
	VideoSettings.apply_aa()


func _on_glow_slider_value_changed(value: float) -> void:
	VideoSettings.glow_scale = value
	_update_glow_label()


func _on_brightness_slider_value_changed(value: float) -> void:
	VideoSettings.brightness = value
	_update_brightness_label()


func _on_back_pressed() -> void:
	VideoSettings.save()
	get_tree().change_scene_to_file(MAIN_MENU_SCENE_PATH)


func _unhandled_input(event: InputEvent) -> void:
	if event.is_action_pressed("ui_cancel"):
		_on_back_pressed()