# client/scripts/theme/build_game_theme.gd
@tool
extends SceneTree
## One-shot Theme builder. Run headless:
##   godot --headless -s res://scripts/theme/build_game_theme.gd
## Constructs game_theme.tres from Palette + the bundled fonts and saves it.
## The builder is the source of truth; the .tres is a committed artifact.
##
## build_theme() is a static func so it is reachable without saving/quitting —
## tests preload this script and call Builder.build_theme() directly to compare
## a fresh in-memory Theme against the committed .tres (drift guard). Preloading
## a script and calling a static func does not run _init() — only `.new()` does
## — so this is safe to call from a test without side effects.
## §2: presentation.

const Palette = preload("res://scripts/theme/palette.gd")
const ThemeKeys = preload("res://scripts/theme/theme_keys.gd")

const OUT := "res://assets/theme/game_theme.tres"
const SERIF := "res://assets/theme/fonts/EBGaramond-VariableFont_wght.ttf"
const ACCENT := "res://assets/theme/fonts/ArchitectsDaughter-Regular.ttf"
const MONO := "res://assets/theme/fonts/JetBrainsMono-VariableFont_wght.ttf"


func _init() -> void:
	var t := build_theme()
	var err := ResourceSaver.save(t, OUT)
	if err != OK:
		push_error("theme save failed: %d" % err)
	else:
		print("wrote ", OUT)
	quit()


static func build_theme() -> Theme:
	var theme := Theme.new()
	_fonts(theme)
	_primary_cta(theme)
	_tabs(theme)
	_chip(theme)
	_tiles(theme)
	_cards_and_panels(theme)
	return theme


static func _flat(bg: Color, border: Color, width := 1, radius := 4) -> StyleBoxFlat:
	var s := StyleBoxFlat.new()
	s.bg_color = bg
	s.border_color = border
	s.set_border_width_all(width)
	s.set_corner_radius_all(radius)
	s.content_margin_left = 12
	s.content_margin_right = 12
	s.content_margin_top = 6
	s.content_margin_bottom = 6
	return s


static func _fonts(theme: Theme) -> void:
	var serif: FontFile = load(SERIF)
	# Global defaults: prose serif at body size.
	theme.default_font = serif
	theme.default_font_size = 18
	# Heading role via the Label "Heading" variation.
	theme.set_type_variation(ThemeKeys.HEADING, "Label")
	theme.set_font(&"font", ThemeKeys.HEADING, serif)
	theme.set_font_size(&"font_size", ThemeKeys.HEADING, 34)
	theme.set_color(&"font_color", ThemeKeys.HEADING, Palette.INK_HEADING)
	# Accent (hand-inked) role.
	theme.set_type_variation(ThemeKeys.ACCENT, "Label")
	theme.set_font(&"font", ThemeKeys.ACCENT, load(ACCENT))
	theme.set_font_size(&"font_size", ThemeKeys.ACCENT, 24)
	theme.set_color(&"font_color", ThemeKeys.ACCENT, Palette.INK_GOLD)
	# Mono chrome role.
	theme.set_type_variation(ThemeKeys.MONO, "Label")
	theme.set_font(&"font", ThemeKeys.MONO, load(MONO))
	theme.set_font_size(&"font_size", ThemeKeys.MONO, 13)
	theme.set_color(&"font_color", ThemeKeys.MONO, Palette.MUTED_MONO)


static func _primary_cta(theme: Theme) -> void:
	var k := ThemeKeys.PRIMARY_CTA
	theme.set_type_variation(k, "Button")
	theme.set_stylebox(&"normal", k, _flat(Palette.BLOOD, Palette.BLOOD, 1, 4))
	theme.set_stylebox(&"hover", k, _flat(Palette.BLOOD_BRIGHT, Palette.BLOOD, 1, 4))
	theme.set_stylebox(&"pressed", k, _flat(Palette.BLOOD_DARK, Palette.BLOOD, 1, 4))
	# Unaffordable/disabled CTA state (2a shell needs this) — desaturated/greyed.
	theme.set_stylebox(&"disabled", k, _flat(Palette.MUTED_MONO_DIM, Palette.MUTED_MONO_DIM, 1, 4))
	theme.set_color(&"font_color", k, Palette.CREAM_BRIGHT)
	theme.set_color(&"font_disabled_color", k, Palette.MUTED_MONO)


static func _tabs(theme: Theme) -> void:
	var tab := ThemeKeys.TAB
	theme.set_type_variation(tab, "Button")
	theme.set_stylebox(&"normal", tab, _flat(Palette.TAB_INACTIVE_BG, Palette.PARCHMENT_BORDER_2, 1, 14))
	theme.set_stylebox(&"hover", tab, _flat(Palette.PARCHMENT_CARD, Palette.PARCHMENT_BORDER_2, 1, 14))
	theme.set_stylebox(&"pressed", tab, _flat(Palette.PARCHMENT_INSET, Palette.PARCHMENT_BORDER, 1, 14))
	theme.set_stylebox(&"focus", tab, StyleBoxEmpty.new())
	theme.set_color(&"font_color", tab, Palette.INK_MUTED)

	var tab_active := ThemeKeys.TAB_ACTIVE
	theme.set_type_variation(tab_active, "Button")
	theme.set_stylebox(&"normal", tab_active, _flat(Palette.BLOOD, Palette.BLOOD, 1, 14))
	theme.set_stylebox(&"hover", tab_active, _flat(Palette.BLOOD_BRIGHT, Palette.BLOOD_BRIGHT, 1, 14))
	theme.set_stylebox(&"pressed", tab_active, _flat(Palette.BLOOD_DARK, Palette.BLOOD, 1, 14))
	theme.set_stylebox(&"focus", tab_active, StyleBoxEmpty.new())
	theme.set_color(&"font_color", tab_active, Palette.CREAM_BRIGHT)


static func _chip(theme: Theme) -> void:
	# Base chip; the semantic colour (red/gold/grey) is applied per-use by script.
	var k := ThemeKeys.CHIP
	theme.set_type_variation(k, "Button")
	theme.set_stylebox(&"normal", k, _flat(Color(Palette.MUTED_MONO, 0.12), Palette.MUTED_MONO, 1, 3))
	theme.set_stylebox(&"hover", k, _flat(Color(Palette.MUTED_MONO, 0.22), Palette.MUTED_MONO, 1, 3))
	theme.set_stylebox(&"pressed", k, _flat(Color(Palette.MUTED_MONO, 0.32), Palette.MUTED_MONO, 1, 3))
	theme.set_stylebox(&"focus", k, StyleBoxEmpty.new())
	theme.set_font(&"font", k, load(MONO))
	theme.set_font_size(&"font_size", k, 11)
	theme.set_color(&"font_color", k, Palette.MUTED_MONO)


static func _tiles(theme: Theme) -> void:
	var filled := _flat(Palette.PARCHMENT_INSET, Palette.PARCHMENT_BORDER, 2, 6)
	theme.set_type_variation(ThemeKeys.ITEM_TILE, "PanelContainer")
	theme.set_stylebox(&"panel", ThemeKeys.ITEM_TILE, filled)
	var empty := _flat(Palette.PARCHMENT_INSET_2, Palette.PARCHMENT_BORDER_3, 1, 6)
	empty.draw_center = false
	theme.set_type_variation(ThemeKeys.ITEM_TILE_EMPTY, "PanelContainer")
	theme.set_stylebox(&"panel", ThemeKeys.ITEM_TILE_EMPTY, empty)


static func _cards_and_panels(theme: Theme) -> void:
	theme.set_type_variation(ThemeKeys.PARCHMENT_CARD, "PanelContainer")
	theme.set_stylebox(&"panel", ThemeKeys.PARCHMENT_CARD, _flat(Palette.PARCHMENT_CARD, Palette.PARCHMENT_BORDER, 1, 6))
	theme.set_type_variation(ThemeKeys.PARCHMENT_INSET, "PanelContainer")
	theme.set_stylebox(&"panel", ThemeKeys.PARCHMENT_INSET, _flat(Palette.PARCHMENT_INSET, Palette.PARCHMENT_BORDER_3, 1, 4))
	theme.set_type_variation(ThemeKeys.DARK_PANEL, "PanelContainer")
	theme.set_stylebox(&"panel", ThemeKeys.DARK_PANEL, _flat(Palette.DARK_PANEL_70, Palette.BORDER_4, 1, 4))