class_name UiStyles
extends RefCounted
## Shared button states for the dark session/UI shell.
##
## Keeping one style table means every normal/hover/pressed/focused/disabled
## state is explicit. Buttons that use the Godot default theme otherwise look
## different from the custom start-menu, pause and review rows as soon as they
## are disabled or receive keyboard focus.

const TEXT := Color(0.94, 0.94, 0.92)
const TEXT_HOVER := Color.WHITE
const TEXT_DISABLED := Color(0.48, 0.50, 0.56)
const SURFACE := Color(0.115, 0.125, 0.15, 0.96)
const SURFACE_HOVER := Color(0.16, 0.175, 0.21, 0.98)
const SURFACE_PRESSED := Color(0.075, 0.085, 0.105, 0.98)
const SURFACE_DISABLED := Color(0.075, 0.08, 0.095, 0.72)
const ACCENT := Color(0.78, 0.82, 0.88, 0.9)

static func apply_button(button: Button, font_size: int = 0, compact: bool = false) -> void:
	if button == null:
		return
	if font_size > 0:
		button.add_theme_font_size_override("font_size", font_size)
	var margin_h := 12 if compact else 18
	var margin_v := 7 if compact else 10
	var normal := _box(SURFACE, margin_h, margin_v)
	var hover := _box(SURFACE_HOVER, margin_h, margin_v)
	var pressed := _box(SURFACE_PRESSED, margin_h, margin_v)
	var disabled := _box(SURFACE_DISABLED, margin_h, margin_v)
	var focus := _box(Color(0, 0, 0, 0), margin_h, margin_v)
	focus.border_color = ACCENT
	focus.border_width_left = 2
	focus.border_width_top = 2
	focus.border_width_right = 2
	focus.border_width_bottom = 2
	button.add_theme_stylebox_override("normal", normal)
	button.add_theme_stylebox_override("hover", hover)
	button.add_theme_stylebox_override("pressed", pressed)
	button.add_theme_stylebox_override("focus", focus)
	button.add_theme_stylebox_override("disabled", disabled)
	button.add_theme_color_override("font_color", TEXT)
	button.add_theme_color_override("font_hover_color", TEXT_HOVER)
	button.add_theme_color_override("font_pressed_color", TEXT_HOVER)
	button.add_theme_color_override("font_focus_color", TEXT_HOVER)
	button.add_theme_color_override("font_disabled_color", TEXT_DISABLED)

static func _box(color: Color, margin_h: int, margin_v: int) -> StyleBoxFlat:
	var box := StyleBoxFlat.new()
	box.bg_color = color
	box.corner_radius_top_left = 10
	box.corner_radius_top_right = 10
	box.corner_radius_bottom_left = 10
	box.corner_radius_bottom_right = 10
	box.content_margin_left = margin_h
	box.content_margin_right = margin_h
	box.content_margin_top = margin_v
	box.content_margin_bottom = margin_v
	return box