class_name MainMenu
extends CanvasLayer

## MainMenu - Title menu using pre-designed background image (title_menu.png)
## The window is sized to match the image (67% of 1024x1536).
## The image fills the entire window; buttons overlay the pre-drawn slots.

signal quick_play
signal play_game
signal online_game
signal open_settings
signal quit_game

# UI Components
var bg_texture: TextureRect
var buttons_container: Control
var quick_play_button: Button
var play_button: Button
var online_button: Button
var settings_button: Button
var quit_button: Button
var version_label: Label

# Custom font
var custom_font: Font = preload("res://JimNightshade-Regular.ttf")

# Per-button pixel rects: Rect2(x, y, width, height) at 460x689 window size
# Measured from the pre-drawn button slots in title_menu.png
const BUTTON_RECTS := [
	Rect2(130, 78, 200, 38),   # Quick Play
	Rect2(130, 163, 200, 38),   # Play
	Rect2(130, 229, 200, 38),   # Online
	Rect2(130, 295, 200, 38),   # Settings
	Rect2(130, 360, 200, 38),   # Exit
]
const DESIGN_SIZE := Vector2(460, 689)

func _ready() -> void:
	# Center the window on screen
	var screen := DisplayServer.screen_get_size()
	var win_size := get_tree().root.size
	DisplayServer.window_set_position(Vector2i(
		(screen.x - win_size.x) / 2,
		(screen.y - win_size.y) / 2
	))
	_create_menu()

func _create_menu() -> void:
	var win_size := get_tree().root.get_visible_rect().size

	# Background image fills the whole window
	bg_texture = TextureRect.new()
	add_child(bg_texture)
	bg_texture.texture = load("res://assets/ui/title_menu.png")
	bg_texture.expand_mode = TextureRect.EXPAND_IGNORE_SIZE
	bg_texture.stretch_mode = TextureRect.STRETCH_KEEP_ASPECT_CENTERED
	bg_texture.position = Vector2.ZERO
	bg_texture.size = win_size
	bg_texture.mouse_filter = Control.MOUSE_FILTER_IGNORE

	# Container for buttons
	buttons_container = Control.new()
	add_child(buttons_container)
	buttons_container.mouse_filter = Control.MOUSE_FILTER_IGNORE

	# Create buttons overlaying the pre-drawn slots
	quick_play_button = _create_overlay_button("Quick Play", 0)
	quick_play_button.add_theme_color_override("font_color", Color(0.15, 0.13, 0.1))
	quick_play_button.add_theme_color_override("font_hover_color", Color(0.3, 0.25, 0.2))
	quick_play_button.add_theme_color_override("font_pressed_color", Color(0.05, 0.05, 0.05))
	quick_play_button.pressed.connect(_on_quick_play_pressed)

	play_button = _create_overlay_button("Play", 1)
	play_button.pressed.connect(_on_play_pressed)

	online_button = _create_overlay_button("Online", 2)
	online_button.disabled = true

	settings_button = _create_overlay_button("Settings", 3)
	settings_button.disabled = true

	quit_button = _create_overlay_button("Exit", 4)
	quit_button.pressed.connect(_on_quit_pressed)

	# Version label
	version_label = Label.new()
	version_label.text = "v0.1.0"
	version_label.add_theme_font_override("font", custom_font)
	version_label.add_theme_font_size_override("font_size", 11)
	version_label.add_theme_color_override("font_color", Color(0.6, 0.6, 0.7, 0.5))
	add_child(version_label)

	# Position everything
	_reposition_elements()

func _create_overlay_button(text: String, slot_index: int) -> Button:
	var button = Button.new()
	button.text = text
	button.add_theme_font_override("font", custom_font)
	button.add_theme_font_size_override("font_size", 20)
	button.add_theme_color_override("font_color", Color(0.85, 0.82, 0.72))
	button.add_theme_color_override("font_hover_color", Color(1.0, 0.95, 0.8))
	button.add_theme_color_override("font_pressed_color", Color(0.7, 0.65, 0.55))
	button.add_theme_color_override("font_disabled_color", Color(0.45, 0.42, 0.38))

	# Transparent background so the pre-drawn button art shows through
	var transparent = StyleBoxFlat.new()
	transparent.bg_color = Color(0, 0, 0, 0)
	transparent.set_border_width_all(0)
	transparent.set_content_margin_all(0)
	button.add_theme_stylebox_override("normal", transparent)

	var hover_style = StyleBoxFlat.new()
	hover_style.bg_color = Color(1, 1, 1, 0.1)
	hover_style.set_border_width_all(0)
	hover_style.set_content_margin_all(0)
	button.add_theme_stylebox_override("hover", hover_style)

	var pressed_style = StyleBoxFlat.new()
	pressed_style.bg_color = Color(0, 0, 0, 0.2)
	pressed_style.set_border_width_all(0)
	pressed_style.set_content_margin_all(0)
	button.add_theme_stylebox_override("pressed", pressed_style)

	var disabled_style = StyleBoxFlat.new()
	disabled_style.bg_color = Color(0, 0, 0, 0.35)
	disabled_style.set_border_width_all(0)
	disabled_style.set_content_margin_all(0)
	button.add_theme_stylebox_override("disabled", disabled_style)

	button.set_meta("slot_index", slot_index)
	buttons_container.add_child(button)
	return button

func _reposition_elements() -> void:
	var win_size := get_tree().root.get_visible_rect().size

	# Image fills window
	bg_texture.size = win_size

	# Scale factor from design size to actual window size
	var scale := Vector2(win_size.x / DESIGN_SIZE.x, win_size.y / DESIGN_SIZE.y)
	var base_font := int(22.0 * scale.y)

	# Position each button using its individual rect
	for child in buttons_container.get_children():
		if child is Button:
			var slot: int = child.get_meta("slot_index", -1)
			if slot < 0 or slot >= BUTTON_RECTS.size():
				continue
			var rect: Rect2 = BUTTON_RECTS[slot]
			child.position = Vector2(rect.position.x * scale.x, rect.position.y * scale.y)
			child.size = Vector2(rect.size.x * scale.x, rect.size.y * scale.y)
			child.add_theme_font_override("font", custom_font)
			child.add_theme_font_size_override("font_size", base_font)

	# Version label bottom-right
	version_label.position = Vector2(win_size.x - 80, win_size.y - 24)
	version_label.size = Vector2(72, 18)

func _on_quick_play_pressed() -> void:
	quick_play.emit()

func _on_play_pressed() -> void:
	play_game.emit()

func _on_quit_pressed() -> void:
	quit_game.emit()
	get_tree().quit()