class_name LuneModalPanel
extends Control
## A window over the field for detail work (hero, recruiting). A light backdrop keeps clicks
## away from the world and closes the window; Esc and the × close it too. The window never
## covers the whole screen, and it only opens on request.

signal closed

var panel: PanelContainer
var body: VBoxContainer
var title: Label
var _close: Button
var _box: Vector2

func _init(window_size: Vector2 = Vector2(980, 600)) -> void:
	_box = window_size
	set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	mouse_filter = Control.MOUSE_FILTER_STOP
	visible = false
	var backdrop := ColorRect.new()
	backdrop.color = Color(.01, .015, .025, .38)
	backdrop.set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	backdrop.mouse_filter = Control.MOUSE_FILTER_STOP
	backdrop.gui_input.connect(func(event: InputEvent) -> void:
		if event is InputEventMouseButton and event.pressed and event.button_index == MOUSE_BUTTON_LEFT:
			close())
	add_child(backdrop)
	panel = PanelContainer.new()
	panel.theme_type_variation = "HudModal"
	panel.mouse_filter = Control.MOUSE_FILTER_STOP
	add_child(panel)
	var column := VBoxContainer.new()
	column.add_theme_constant_override("separation", 12)
	panel.add_child(column)
	var head := HBoxContainer.new()
	column.add_child(head)
	title = LuneUiTheme.label("", "HudTitle", head)
	title.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_close = LuneUiTheme.button("", "HudIconButton", head)
	_close.custom_minimum_size = Vector2(36, 34)
	var cross := LuneGlyph.make("close", LuneUiTheme.MUTED, 14.0, _close)
	cross.set_anchors_and_offsets_preset(Control.PRESET_CENTER)
	_close.pressed.connect(close)
	LuneTooltip.attach(_close, func() -> Dictionary: return {"title": "Schließen", "text": "Esc oder Klick neben das Fenster."})
	body = VBoxContainer.new()
	body.add_theme_constant_override("separation", 10)
	body.size_flags_vertical = Control.SIZE_EXPAND_FILL
	column.add_child(body)
	resized.connect(_layout)

func open(heading: String) -> void:
	title.text = heading
	visible = true
	_layout()

func close() -> void:
	if visible:
		visible = false
		closed.emit()

func _layout() -> void:
	var edge: Vector2 = Vector2(minf(_box.x, size.x - 40.0), minf(_box.y, size.y - 40.0))
	panel.custom_minimum_size = edge
	panel.size = edge
	panel.position = ((size - edge) * .5).floor()

func _gui_input(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		accept_event()

func _unhandled_key_input(event: InputEvent) -> void:
	if visible and event is InputEventKey and event.pressed and event.keycode == KEY_ESCAPE:
		close()
		get_viewport().set_input_as_handled()