class_name StartMenu
extends CanvasLayer
## Startup menu: pick a venue, start the shift, open settings, or quit.
## Keyboard and mouse both work. Replaces `V` as the player-facing venue path
## (the `V` bind stays as a debug shortcut).

signal venue_selected(scenario_id: String)
signal settings_requested()
signal quit_requested()

const VENUES := [
	{"id": "hollywood_building", "label": "Hollywood Boulevard", "blurb": "Building entrance, tourists and late-night trouble."},
	{"id": "joke_shop", "label": "The Joke Shop", "blurb": "Guest list, IDs and wand screening."},
	{"id": "tv_studio", "label": "Late Night TV Studio", "blurb": "Credentials, filming boundary, celebrity arrivals."},
]

var _index := 0
var _buttons: Array[Button] = []
var _root: Control = null

func _ready() -> void:
	layer = 20
	_build()
	hide()

func _build() -> void:
	_root = Control.new()
	_root.name = "StartMenuRoot"
	_root.set_anchors_preset(Control.PRESET_FULL_RECT)
	_root.mouse_filter = Control.MOUSE_FILTER_STOP
	add_child(_root)

	var bg := ColorRect.new()
	bg.color = Color(0.03, 0.04, 0.07, 0.96)
	bg.set_anchors_preset(Control.PRESET_FULL_RECT)
	bg.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_root.add_child(bg)

	var center := CenterContainer.new()
	center.set_anchors_preset(Control.PRESET_FULL_RECT)
	_root.add_child(center)

	var column := VBoxContainer.new()
	column.name = "Column"
	column.custom_minimum_size = Vector2(460, 0)
	column.add_theme_constant_override("separation", 14)
	center.add_child(column)

	var title := Label.new()
	title.text = "STEP LINE"
	title.add_theme_font_size_override("font_size", 44)
	title.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	column.add_child(title)

	var subtitle := Label.new()
	subtitle.text = "Pick a venue to start your shift."
	subtitle.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	subtitle.add_theme_color_override("font_color", Color(0.72, 0.75, 0.82))
	column.add_child(subtitle)

	for i in VENUES.size():
		var venue: Dictionary = VENUES[i]
		var button := Button.new()
		button.name = "Venue_%s" % venue["id"]
		button.text = "%s\n%s" % [venue["label"], venue["blurb"]]
		button.alignment = HORIZONTAL_ALIGNMENT_LEFT
		button.custom_minimum_size = Vector2(460, 62)
		button.pressed.connect(_on_venue_pressed.bind(i))
		column.add_child(button)
		_buttons.append(button)

	var spacer := Control.new()
	spacer.custom_minimum_size = Vector2(0, 10)
	column.add_child(spacer)

	var row := HBoxContainer.new()
	row.alignment = BoxContainer.ALIGNMENT_CENTER
	row.add_theme_constant_override("separation", 12)
	column.add_child(row)

	var settings_button := Button.new()
	settings_button.name = "SettingsButton"
	settings_button.text = "Settings"
	settings_button.pressed.connect(func(): settings_requested.emit())
	row.add_child(settings_button)

	var quit_button := Button.new()
	quit_button.name = "QuitButton"
	quit_button.text = "Quit"
	quit_button.pressed.connect(func(): quit_requested.emit())
	row.add_child(quit_button)

	var hint := Label.new()
	hint.text = "Up/Down to choose, Enter to start, Esc to quit"
	hint.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	hint.add_theme_color_override("font_color", Color(0.55, 0.58, 0.65))
	column.add_child(hint)

	_focus_index(0)

func _focus_index(i: int) -> void:
	if _buttons.is_empty():
		return
	_index = clampi(i, 0, _buttons.size() - 1)
	_buttons[_index].grab_focus()

func open() -> void:
	visible = true
	_root.visible = true
	Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
	_focus_index(_index)

func close() -> void:
	visible = false
	_root.visible = false

func _unhandled_input(event: InputEvent) -> void:
	if not visible:
		return
	if event is InputEventKey and event.pressed and not event.echo:
		match event.keycode:
			KEY_UP, KEY_W:
				_focus_index(_index - 1)
				get_viewport().set_input_as_handled()
			KEY_DOWN, KEY_S:
				_focus_index(_index + 1)
				get_viewport().set_input_as_handled()
			KEY_ENTER, KEY_KP_ENTER, KEY_SPACE:
				_on_venue_pressed(_index)
				get_viewport().set_input_as_handled()
			KEY_ESCAPE:
				quit_requested.emit()
				get_viewport().set_input_as_handled()

func _on_venue_pressed(i: int) -> void:
	if i < 0 or i >= VENUES.size():
		return
	var venue: Dictionary = VENUES[i]
	close()
	venue_selected.emit(str(venue["id"]))