extends CanvasLayer
## Fadenkreuz, Statusleiste, Interaktionshinweis und Meldungen.

const Cargo = preload("res://scripts/cargo.gd")
const Defs = preload("res://scripts/car_defs.gd")
const PassengerScript = preload("res://scripts/passenger.gd")
const PlayerScript = preload("res://scripts/player.gd")

var _stats := Label.new()
var _prompt := Label.new()
var _drive := Label.new()
var _cross := Panel.new()
var _toasts: Array = []
var _toast_box := VBoxContainer.new()

const PROMPTS := {
	"drive": "E  Steuerung übernehmen",
	"shop": "E  Depot-Terminal öffnen",
	"tap": "E  Getränke aufnehmen",
	"load": "E halten  Be- und entladen",
	"seat": "E  Fahrgast",
}

func _ready() -> void:
	layer = 1
	var panel := PanelContainer.new()
	panel.position = Vector2(18, 16)
	panel.add_theme_stylebox_override("panel", _bg(Color(0.08, 0.11, 0.09, 0.55)))
	add_child(panel)
	_stats.add_theme_font_size_override("font_size", 17)
	panel.add_child(_stats)

	_toast_box.add_theme_constant_override("separation", 4)
	_toast_box.position = Vector2(18, 258)
	add_child(_toast_box)

	_prompt.add_theme_font_size_override("font_size", 20)
	_prompt.add_theme_color_override("font_color", Color("ffe9a8"))
	_prompt.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	add_child(_prompt)

	_drive.add_theme_font_size_override("font_size", 22)
	_drive.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	add_child(_drive)

	var cs := StyleBoxFlat.new()
	cs.bg_color = Color(1, 1, 1, 0.75)
	cs.set_corner_radius_all(3)
	_cross.add_theme_stylebox_override("panel", cs)
	_cross.size = Vector2(5, 5)
	add_child(_cross)

	# Kein HUD-Element darf Eingaben schlucken - sonst stirbt der Mausblick.
	_ignore_mouse(self)
	get_viewport().size_changed.connect(_layout)
	_layout()

func _ignore_mouse(n: Node) -> void:
	if n is Control:
		(n as Control).mouse_filter = Control.MOUSE_FILTER_IGNORE
	for c in n.get_children():
		_ignore_mouse(c)

func _bg(c: Color) -> StyleBoxFlat:
	var s := StyleBoxFlat.new()
	s.bg_color = c
	s.set_corner_radius_all(10)
	s.set_content_margin_all(14)
	return s

func _layout() -> void:
	var v := get_viewport().get_visible_rect().size
	_cross.position = v * 0.5 - Vector2(2.5, 2.5)
	_prompt.size = Vector2(v.x, 30)
	_prompt.position = Vector2(0, v.y * 0.58)
	_drive.size = Vector2(v.x, 34)
	_drive.position = Vector2(0, v.y - 96)

func refresh(game) -> void:
	var t = game.train
	var lines: Array[String] = []
	lines.append("%d €     Ansehen %d" % [game.money, game.reputation])
	lines.append("")
	lines.append("Zug   %s + %d Wagen" % [Defs.display_name(t.loco_id), t.consist.size()])
	lines.append("Tempo %3.0f km/h" % t.speed_kmh())

	var seated := 0
	var thirsty := 0
	var unchecked := 0
	for p in game.passengers:
		if p.state == PassengerScript.State.SEATED:
			seated += 1
			if p.wants_drink and not p.served:
				thirsty += 1
			if not p.ticket_checked:
				unchecked += 1
	lines.append("Gäste %d / %d   ohne Ticket %d   Durst %d"
		% [seated, t.seat_count(), unchecked, thirsty])

	var cargo_txt := "leer"
	if t.total_cargo() > 0:
		var parts: Array[String] = []
		for k in t.cargo.keys():
			parts.append("%s %d" % [Cargo.NAMES[int(k)], int(t.cargo[k])])
		cargo_txt = ", ".join(parts)
	lines.append("Ladung %d / %d   (%s)" % [t.total_cargo(), t.cargo_capacity(), cargo_txt])
	if game.player.carrying > 0:
		lines.append("Getränke dabei: %d" % game.player.carrying)

	var st = t.docked_at
	if st != null and t.speed < 0.1:
		var extra := ""
		if st.produces >= 0:
			extra = "  Lager: %s %d" % [Cargo.NAMES[st.produces], int(st.stock)]
		lines.append("Halt: %s%s" % [st.station_name, extra])
	else:
		var nxt: Array = t.next_station()
		lines.append("Nächster Halt: %s (%d m)" % [nxt[0].station_name, int(nxt[1])])
	_stats.text = "\n".join(lines)

	var h: Dictionary = game.player.hotspot
	if game.player.mode == PlayerScript.Mode.DRIVE:
		_prompt.text = "E  Steuerung abgeben"
	elif h.is_empty():
		_prompt.text = ""
	elif String(h["kind"]) == "seat":
		_prompt.text = _seat_prompt(game, h)
	else:
		_prompt.text = String(PROMPTS.get(String(h["kind"]), ""))

	if game.player.mode == PlayerScript.Mode.DRIVE:
		_drive.text = "W Gas    S Bremse    A/D Weiche    %3.0f km/h" % t.speed_kmh()
		_drive.add_theme_color_override("font_color",
			Color("aef2a0") if t.speed > 0.2 else Color("ffd978"))
	else:
		_drive.text = ""
	_cross.visible = not game.player.input_locked
	_tick_toasts()

func _seat_prompt(game, h: Dictionary) -> String:
	var car = game.train.cars[int(h["car"])]
	var occ = car.seats[int(h["seat"])]["occupant"]
	if occ == null:
		return "Freier Platz"
	if not occ.ticket_checked:
		return "E  Ticket kontrollieren  (%d €)" % occ.fare
	if occ.wants_drink and not occ.served:
		return "E  Getränk servieren" if game.player.carrying > 0 else "Braucht ein Getränk"
	if game.upgrades.has("schedule"):
		return "Ziel: %s  -  %s" % [game.stations[occ.dest_station].station_name, occ.mood_word()]
	return "E  Nachfragen"

# --- Meldungen ------------------------------------------------------------

func toast(text: String, color: Color = Color("aef2a0")) -> void:
	var l := Label.new()
	l.text = text
	l.add_theme_font_size_override("font_size", 19)
	l.add_theme_color_override("font_color", color)
	l.add_theme_color_override("font_outline_color", Color(0, 0, 0, 0.8))
	l.add_theme_constant_override("outline_size", 5)
	l.mouse_filter = Control.MOUSE_FILTER_IGNORE
	_toast_box.add_child(l)
	_toasts.append({"node": l, "time": 3.4})
	if _toasts.size() > 5:
		var old: Dictionary = _toasts.pop_front()
		old["node"].queue_free()

func _tick_toasts() -> void:
	var dt := get_process_delta_time()
	for e in _toasts.duplicate():
		e["time"] -= dt
		if e["time"] <= 0.0:
			e["node"].queue_free()
			_toasts.erase(e)
		else:
			e["node"].modulate.a = clampf(float(e["time"]) / 0.9, 0.0, 1.0)