extends CanvasLayer
## Startmenue: Einzelspieler, Hosten oder einer Sitzung beitreten.

signal solo_chosen()
signal continue_chosen()
signal host_chosen(port: int)
signal join_chosen(address: String, port: int)

const DEFAULT_PORT := 7654

var _root: Control
var _status := Label.new()
var _addr := LineEdit.new()
var _port := LineEdit.new()
var _name := LineEdit.new()
var _continue: Button

func _ready() -> void:
	layer = 3
	_root = Control.new()
	_root.set_anchors_preset(Control.PRESET_FULL_RECT)
	add_child(_root)

	var bg := ColorRect.new()
	bg.color = Color("14201c")
	bg.set_anchors_preset(Control.PRESET_FULL_RECT)
	_root.add_child(bg)

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

	var vb := VBoxContainer.new()
	vb.add_theme_constant_override("separation", 14)
	vb.custom_minimum_size = Vector2(420, 0)
	center.add_child(vb)

	var title := Label.new()
	title.text = "Cozy Train"
	title.add_theme_font_size_override("font_size", 52)
	title.add_theme_color_override("font_color", Color("ffd978"))
	title.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	vb.add_child(title)

	var sub := Label.new()
	sub.text = "Eine Crew, ein Zug, viele Fahrgäste."
	sub.add_theme_font_size_override("font_size", 17)
	sub.add_theme_color_override("font_color", Color(1, 1, 1, 0.7))
	sub.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	vb.add_child(sub)

	vb.add_child(_spacer(18))
	_name.placeholder_text = "Dein Name"
	_name.text = "Crew"
	_name.max_length = 16
	_name.alignment = HORIZONTAL_ALIGNMENT_CENTER
	vb.add_child(_name)
	_continue = _button("Weiterspielen", func(): continue_chosen.emit())
	_continue.visible = FileAccess.file_exists("user://save.json")
	vb.add_child(_continue)
	vb.add_child(_button("Einzelspieler", func(): solo_chosen.emit()))
	vb.add_child(_button("Sitzung hosten", func(): host_chosen.emit(_port_value())))

	var row := HBoxContainer.new()
	row.add_theme_constant_override("separation", 8)
	_addr.text = "127.0.0.1"
	_addr.placeholder_text = "Adresse"
	_addr.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	row.add_child(_addr)
	_port.text = str(DEFAULT_PORT)
	_port.custom_minimum_size = Vector2(90, 0)
	row.add_child(_port)
	vb.add_child(row)
	vb.add_child(_button("Beitreten", func(): join_chosen.emit(_addr.text, _port_value())))

	_status.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	_status.add_theme_font_size_override("font_size", 16)
	_status.add_theme_color_override("font_color", Color("ffb4a0"))
	vb.add_child(_status)

	var help := Label.new()
	help.text = "Maus: umsehen   WASD: laufen   E: benutzen   V: Außenkamera   Esc: Maus frei"
	help.add_theme_font_size_override("font_size", 14)
	help.add_theme_color_override("font_color", Color(1, 1, 1, 0.45))
	help.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	vb.add_child(help)

func _spacer(h: int) -> Control:
	var c := Control.new()
	c.custom_minimum_size = Vector2(0, h)
	return c

func _button(text: String, cb: Callable) -> Button:
	var b := Button.new()
	b.text = text
	b.custom_minimum_size = Vector2(0, 46)
	b.add_theme_font_size_override("font_size", 20)
	b.pressed.connect(cb)
	return b

func _port_value() -> int:
	var v := int(_port.text)
	return v if v > 0 else DEFAULT_PORT

func player_name() -> String:
	var n := _name.text.strip_edges()
	return n if n != "" else "Crew"

func set_status(text: String) -> void:
	_status.text = text

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

func show_menu() -> void:
	_root.visible = true