extends CanvasLayer
## Depot-Terminal: Loks, Waggons und Ausbauten kaufen oder verkaufen.

const Defs = preload("res://scripts/car_defs.gd")

signal closed()

var is_open := false

var _game
var _root: Control
var _tabs: TabContainer
var _money := Label.new()

func setup(game) -> void:
	_game = game
	layer = 2
	_root = Control.new()
	_root.set_anchors_preset(Control.PRESET_FULL_RECT)
	_root.visible = false
	add_child(_root)

	var dim := ColorRect.new()
	dim.color = Color(0, 0, 0, 0.55)
	dim.set_anchors_preset(Control.PRESET_FULL_RECT)
	_root.add_child(dim)

	var panel := PanelContainer.new()
	panel.set_anchors_preset(Control.PRESET_CENTER)
	panel.custom_minimum_size = Vector2(760, 520)
	panel.grow_horizontal = Control.GROW_DIRECTION_BOTH
	panel.grow_vertical = Control.GROW_DIRECTION_BOTH
	var sb := StyleBoxFlat.new()
	sb.bg_color = Color("1b2420")
	sb.set_corner_radius_all(14)
	sb.set_content_margin_all(18)
	sb.border_color = Color("3d5a4c")
	sb.set_border_width_all(2)
	panel.add_theme_stylebox_override("panel", sb)
	_root.add_child(panel)

	var vb := VBoxContainer.new()
	vb.add_theme_constant_override("separation", 10)
	panel.add_child(vb)

	var head := HBoxContainer.new()
	var title := Label.new()
	title.text = "Depot-Terminal"
	title.add_theme_font_size_override("font_size", 26)
	head.add_child(title)
	var spacer := Control.new()
	spacer.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	head.add_child(spacer)
	_money.add_theme_font_size_override("font_size", 22)
	_money.add_theme_color_override("font_color", Color("ffd978"))
	head.add_child(_money)
	vb.add_child(head)

	var hint := Label.new()
	hint.text = "Esc schließt das Terminal."
	hint.add_theme_font_size_override("font_size", 14)
	hint.add_theme_color_override("font_color", Color(1, 1, 1, 0.6))
	vb.add_child(hint)

	_tabs = TabContainer.new()
	_tabs.size_flags_vertical = Control.SIZE_EXPAND_FILL
	vb.add_child(_tabs)

func open() -> void:
	is_open = true
	_root.visible = true
	_rebuild()

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

func refresh() -> void:
	_rebuild()

func _rebuild() -> void:
	_money.text = "%d €    Ansehen %d" % [_game.money, _game.reputation]
	var tab := _tabs.current_tab
	for c in _tabs.get_children():
		c.queue_free()
	_tabs.add_child(_page("Loks", _loco_rows()))
	_tabs.add_child(_page("Waggons", _car_rows()))
	_tabs.add_child(_page("Mein Zug", _consist_rows()))
	_tabs.add_child(_page("Ausbauten", _upgrade_rows()))
	if tab >= 0 and tab < 4:
		_tabs.current_tab = tab

func _page(title: String, rows: Array) -> Control:
	var scroll := ScrollContainer.new()
	scroll.name = title
	var vb := VBoxContainer.new()
	vb.add_theme_constant_override("separation", 8)
	vb.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	scroll.add_child(vb)
	for r in rows:
		vb.add_child(r)
	return scroll

func _row(title: String, desc: String, right_text: String, button_text: String,
		enabled: bool, on_press: Callable) -> Control:
	var pc := PanelContainer.new()
	var sb := StyleBoxFlat.new()
	sb.bg_color = Color(1, 1, 1, 0.05)
	sb.set_corner_radius_all(8)
	sb.set_content_margin_all(10)
	pc.add_theme_stylebox_override("panel", sb)

	var hb := HBoxContainer.new()
	hb.add_theme_constant_override("separation", 12)
	pc.add_child(hb)

	var vb := VBoxContainer.new()
	vb.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	var t := Label.new()
	t.text = title
	t.add_theme_font_size_override("font_size", 19)
	vb.add_child(t)
	var d := Label.new()
	d.text = desc
	d.add_theme_font_size_override("font_size", 14)
	d.add_theme_color_override("font_color", Color(1, 1, 1, 0.65))
	vb.add_child(d)
	hb.add_child(vb)

	var r := Label.new()
	r.text = right_text
	r.add_theme_font_size_override("font_size", 17)
	r.custom_minimum_size = Vector2(190, 0)
	r.horizontal_alignment = HORIZONTAL_ALIGNMENT_RIGHT
	hb.add_child(r)

	var b := Button.new()
	b.text = button_text
	b.disabled = not enabled
	b.custom_minimum_size = Vector2(120, 40)
	b.pressed.connect(func():
		if _game.audio != null:
			_game.audio.play("click", -14.0)
		on_press.call())
	hb.add_child(b)
	return pc

func _lock_note(rep_needed: int) -> String:
	if _game.reputation >= rep_needed:
		return ""
	return "  (ab Ansehen %d)" % rep_needed

func _loco_rows() -> Array:
	var rows: Array = []
	for id in Defs.LOCOS.keys():
		var d: Dictionary = Defs.LOCOS[id]
		var owned: bool = _game.train.loco_id == id
		var rep: int = int(d["rep"])
		var price: int = int(d["price"])
		var can: bool = not owned and _game.can_buy(price, rep)
		var right := "%d km/h   %d €" % [int(float(d["max_speed"]) * 3.6), price]
		var name: String = String(d["name"]) + (_lock_note(rep) if not owned else "  [im Einsatz]")
		rows.append(_row(name, String(d["desc"]), right,
			"Im Einsatz" if owned else "Kaufen", can,
			func(): _game.request("buy_loco", id); _rebuild()))
	return rows

func _car_rows() -> Array:
	var rows: Array = []
	for id in Defs.CARS.keys():
		var d: Dictionary = Defs.CARS[id]
		var rep: int = int(d["rep"])
		var price: int = int(d["price"])
		var can: bool = _game.can_buy(price, rep) and _game.train.consist.size() < 6
		rows.append(_row(String(d["name"]) + _lock_note(rep), String(d["desc"]),
			"%d €" % price, "Kaufen", can,
			func(): _game.request("buy_car", id); _rebuild()))
	return rows

func _consist_rows() -> Array:
	var rows: Array = []
	var d: Dictionary = Defs.LOCOS[_game.train.loco_id]
	rows.append(_row(String(d["name"]), "Lok - lässt sich nur ersetzen, nicht verkaufen",
		"", "", false, func(): pass))
	var list: Array = _game.train.consist
	for i in list.size():
		var cid: String = list[i]
		var cd: Dictionary = Defs.CARS[cid]
		var idx := i
		rows.append(_row("%d.  %s" % [i + 1, String(cd["name"])], String(cd["desc"]),
			"Rücknahme %d €" % int(cd["sell"]), "Verkaufen", true,
			func(): _game.request("sell_car", "", idx); _rebuild()))
	if list.is_empty():
		rows.append(_row("Keine Waggons", "Kauf dir mindestens einen Wagen.", "", "", false,
			func(): pass))
	return rows

func _upgrade_rows() -> Array:
	var rows: Array = []
	for id in Defs.UPGRADES.keys():
		var d: Dictionary = Defs.UPGRADES[id]
		var owned: bool = _game.upgrades.has(id)
		var rep: int = int(d["rep"])
		var price: int = int(d["price"])
		var can: bool = not owned and _game.can_buy(price, rep)
		rows.append(_row(String(d["name"]) + (_lock_note(rep) if not owned else ""),
			String(d["desc"]), "" if owned else "%d €" % price,
			"Gekauft" if owned else "Kaufen", can,
			func(): _game.request("buy_upgrade", id); _rebuild()))
	return rows