extends "res://src/ui/panels/editor_panel.gd"
## Terrain-Werkzeug-Panel (aus main.gd ausgezogen, Karte t_eaccbfed U1 —
## Logik unverändert, Karte t_9aba04f1 + t_603ec1a8): großer Modus-Button +
## Pinsel-Modi, Material-Palette, Größe/Stärke-Regler. Werkzeug-Ein/Aus bleibt
## im Koordinator (main.gd _enter/_leave terrain), das Panel hält nur die
## Widgets und die Regler-Verdrahtung.

var terrain_edit_btn: Button
var terrain_panel: VBoxContainer
var terrain_mode_raise: Button
var terrain_mode_lower: Button
var terrain_mode_smooth: Button
var terrain_mode_paint: Button
var terrain_palette: VBoxContainer
var terrain_mat_buttons: Array = []          # Gras/Sand/Fels (ButtonGroup)
var terrain_size_btn_small: Button
var terrain_size_btn_medium: Button
var terrain_size_btn_large: Button
var terrain_radius_slider: HSlider
var terrain_radius_label: Label
var terrain_strength_slider: HSlider
var terrain_strength_label: Label

# --- Bauen (Karte t_97ea59c5) — im selben Werkzeug-Tab (aus main.gd ausgezogen)
var build_edit_btn: Button
var build_panel: VBoxContainer
var build_kind_buttons: Dictionary = {}   # kind_id → Button


static func spec() -> Dictionary:
	return {"titel": "Terrain", "gruppe": "rechts", "order": 40}


func build() -> void:
	terrain_edit_btn = Button.new()
	terrain_edit_btn.text = "⛰  Terrain formen"
	terrain_edit_btn.custom_minimum_size = UIScale.v2(0, 48)
	terrain_edit_btn.toggle_mode = true
	terrain_edit_btn.tooltip_text = "Boden heben, senken und glätten — direkt in der Karte malen"
	terrain_edit_btn.pressed.connect(_on_terrain_btn_pressed)
	add_child(terrain_edit_btn)

	terrain_panel = VBoxContainer.new()
	terrain_panel.add_theme_constant_override("separation", UIScale.px(6))
	terrain_panel.visible = false
	add_child(terrain_panel)

	terrain_panel.add_child(_field_label("Pinsel-Werkzeug:"))
	var mode_row := HBoxContainer.new()
	mode_row.add_theme_constant_override("separation", UIScale.px(6))
	terrain_panel.add_child(mode_row)
	var mode_group := ButtonGroup.new()
	terrain_mode_raise = _terrain_mode_button("Heben ⬆", mode_group)
	terrain_mode_lower = _terrain_mode_button("Senken ⬇", mode_group)
	terrain_mode_smooth = _terrain_mode_button("Glätten ≈", mode_group)
	terrain_mode_paint = _terrain_mode_button("Malen 🖌", mode_group)
	terrain_mode_raise.button_pressed = true
	terrain_mode_raise.toggled.connect(_on_terrain_mode_changed)
	terrain_mode_lower.toggled.connect(_on_terrain_mode_changed)
	terrain_mode_smooth.toggled.connect(_on_terrain_mode_changed)
	terrain_mode_paint.toggled.connect(_on_terrain_mode_changed)
	mode_row.add_child(terrain_mode_raise)
	mode_row.add_child(terrain_mode_lower)
	mode_row.add_child(terrain_mode_smooth)
	mode_row.add_child(terrain_mode_paint)

	# Material-Palette (Karte t_603ec1a8): nur sichtbar im Malen-Modus.
	terrain_palette = VBoxContainer.new()
	terrain_palette.add_theme_constant_override("separation", UIScale.px(4))
	terrain_palette.visible = false
	terrain_panel.add_child(terrain_palette)
	terrain_palette.add_child(_field_label("Material:"))
	var mat_row := HBoxContainer.new()
	mat_row.add_theme_constant_override("separation", UIScale.px(6))
	terrain_palette.add_child(mat_row)
	var mat_group := ButtonGroup.new()
	var mat_labels := ["🌿 Gras", "🏖 Sand", "🪨 Fels"]
	for mat_id in SvmapIO.MATERIAL_IDS.size():
		var mat_btn := Button.new()
		mat_btn.text = str(mat_labels[mat_id])
		mat_btn.custom_minimum_size = UIScale.v2(0, 40)
		mat_btn.toggle_mode = true
		mat_btn.button_group = mat_group
		mat_btn.tooltip_text = "Malen: %s" % str(SvmapIO.MATERIAL_IDS[mat_id])
		if mat_id == 0:
			mat_btn.button_pressed = true
		mat_btn.toggled.connect(_on_terrain_material_changed.bind(mat_id))
		terrain_mat_buttons.append(mat_btn)
		mat_row.add_child(mat_btn)

	# Pinselgrößen-Presets (Karte t_603ec1a8): drei große Buttons + freier Slider.
	terrain_panel.add_child(_field_label("Pinselgröße:"))
	var size_row := HBoxContainer.new()
	size_row.add_theme_constant_override("separation", UIScale.px(6))
	terrain_panel.add_child(size_row)
	var size_group := ButtonGroup.new()
	terrain_size_btn_small = _terrain_size_button("Klein\n(4 m)", size_group, 4.0)
	terrain_size_btn_medium = _terrain_size_button("Mittel\n(12 m)", size_group, 12.0)
	terrain_size_btn_large = _terrain_size_button("Groß\n(32 m)", size_group, 32.0)
	# Kein Signal: Der Handler greift auf terrain_radius_slider zu, der erst
	# unten erzeugt wird — beim Panel-Bau wäre das ein Crash (GUI-Start-Bug
	# 15.10.). Der Slider startet unten passend mit 12 m (= Mittel).
	terrain_size_btn_medium.set_pressed_no_signal(true)
	size_row.add_child(terrain_size_btn_small)
	size_row.add_child(terrain_size_btn_medium)
	size_row.add_child(terrain_size_btn_large)

	terrain_radius_label = _field_label("Pinsel-Größe: 12 m")
	terrain_panel.add_child(terrain_radius_label)
	terrain_radius_slider = HSlider.new()
	terrain_radius_slider.min_value = 2.0
	terrain_radius_slider.max_value = 64.0
	terrain_radius_slider.step = 1.0
	terrain_radius_slider.value = 12.0
	terrain_radius_slider.custom_minimum_size = UIScale.v2(0, 32)
	terrain_radius_slider.value_changed.connect(_on_terrain_radius_changed)
	terrain_panel.add_child(terrain_radius_slider)

	terrain_strength_label = _field_label("Stärke: 8 m pro Sekunde")
	terrain_panel.add_child(terrain_strength_label)
	terrain_strength_slider = HSlider.new()
	terrain_strength_slider.min_value = 1.0
	terrain_strength_slider.max_value = 20.0
	terrain_strength_slider.step = 0.5
	terrain_strength_slider.value = 8.0
	terrain_strength_slider.custom_minimum_size = UIScale.v2(0, 32)
	terrain_strength_slider.value_changed.connect(_on_terrain_strength_changed)
	terrain_panel.add_child(terrain_strength_slider)

	terrain_panel.add_child(_muted_label(
			"Linksklick-Ziehen formt bzw. malt (je nach Werkzeug), Strg+Linksklick macht das Gegenteil — im Malen-Modus malt Strg+Klick Gras zurück. "
			+ "Jeder Strich ist EIN Rückgängig-Schritt (Strg+Z). Rechte Maustaste = Flug, ESC beendet den Terrain-Modus."))

	# --- Bauen (Karte t_97ea59c5): Modular-Builder-Pieces im App-Skelett ---
	# (aus main.gd ausgezogen — liegt mit im Terrain-Tab, Werkzeug-Zusammenhang)
	build_edit_btn = Button.new()
	build_edit_btn.text = "🏠  Bauen (Häuser)"
	build_edit_btn.custom_minimum_size = UIScale.v2(0, 48)
	build_edit_btn.toggle_mode = true
	build_edit_btn.tooltip_text = "Fundamente, Wände, Dächer, Treppen und Türen bauen — im 2-Meter-Raster, wie Bauklötze"
	build_edit_btn.pressed.connect(_on_build_btn_pressed)
	add_child(build_edit_btn)

	build_panel = VBoxContainer.new()
	build_panel.add_theme_constant_override("separation", UIScale.px(6))
	build_panel.visible = false
	add_child(build_panel)

	build_panel.add_child(_field_label("Bauteil:"))
	var build_grid := GridContainer.new()
	build_grid.columns = 2
	build_grid.add_theme_constant_override("h_separation", UIScale.px(6))
	build_grid.add_theme_constant_override("v_separation", UIScale.px(6))
	build_panel.add_child(build_grid)
	var build_group := ButtonGroup.new()
	for kind_id in BuildOps.KINDS.keys():
		var kind_btn := Button.new()
		kind_btn.text = str(BuildOps.KINDS[kind_id]["label"])
		kind_btn.toggle_mode = true
		kind_btn.button_group = build_group
		kind_btn.custom_minimum_size = UIScale.v2(148, 44)
		kind_btn.clip_text = true
		kind_btn.tooltip_text = "%s — %s" % [str(BuildOps.KINDS[kind_id]["label"]), str(BuildOps.KINDS[kind_id].get("info", ""))]
		kind_btn.pressed.connect(_on_build_kind_pressed.bind(str(kind_id)))
		build_kind_buttons[str(kind_id)] = kind_btn
		build_grid.add_child(kind_btn)
	(build_kind_buttons["fundament"] as Button).set_pressed_no_signal(true)

	build_panel.add_child(_muted_label(
			"Linksklick setzt das Bauteil aufs 2-m-Raster — auch AUF andere Teile "
			+ "(Wände aufs Fundament stapeln, Dach auf die Wände). Jedes Bauteil ist "
			+ "EIN Rückgängig-Schritt (Strg+Z). ESC beendet den Bauen-Modus."))


func _on_build_btn_pressed() -> void:
	if build_edit_btn.button_pressed:
		main.call("_set_tool_mode", "bauen")
	else:
		main.call("_set_tool_mode", "objects")


func _on_build_kind_pressed(kind_id: String) -> void:
	main.call("_on_build_kind_pressed", kind_id)


func _on_terrain_btn_pressed() -> void:
	if terrain_edit_btn.button_pressed:
		main.call("_set_tool_mode", "terrain")
	else:
		main.call("_set_tool_mode", "objects")


func _terrain_mode_button(text: String, group: ButtonGroup) -> Button:
	var btn := Button.new()
	btn.text = text
	btn.toggle_mode = true
	btn.button_group = group
	btn.custom_minimum_size = UIScale.v2(0, 40)
	return btn


func _selected_terrain_mode() -> int:
	if terrain_mode_lower.button_pressed:
		return TerrainField.Mode.LOWER
	if terrain_mode_smooth.button_pressed:
		return TerrainField.Mode.SMOOTH
	if terrain_mode_paint.button_pressed:
		return TerrainField.Mode.PAINT
	return TerrainField.Mode.RAISE


## Mode-Buttons (ButtonGroup) → Pinsel-Modus; Palette nur im Malen-Modus.
func _on_terrain_mode_changed(_pressed: bool) -> void:
	if terrain_palette != null:
		terrain_palette.visible = _selected_terrain_mode() == TerrainField.Mode.PAINT
	if main.terrain_tool != null:
		main.terrain_tool.call("set_brush_mode", _selected_terrain_mode())


## Material-Palette (Karte t_603ec1a8): gewähltes Material an den Pinsel.
func _on_terrain_material_changed(pressed: bool, mat_id: int) -> void:
	if pressed and main.terrain_tool != null:
		main.terrain_tool.call("set_paint_material", mat_id)


## Pinselgrößen-Presets (Karte t_603ec1a8): setzen den Radius-Slider
## (der Label-Text + Ring-Optik hängen am value_changed-Signal).
func _terrain_size_button(text: String, group: ButtonGroup, radius_m: float) -> Button:
	var btn := Button.new()
	btn.text = text
	btn.toggle_mode = true
	btn.button_group = group
	btn.custom_minimum_size = UIScale.v2(0, 48)
	btn.tooltip_text = "Pinselradius %d m" % int(radius_m)
	btn.toggled.connect(_on_terrain_size_preset.bind(radius_m))
	return btn


func _on_terrain_size_preset(pressed: bool, radius_m: float) -> void:
	# Null-Check als Schutznetz: beim Panel-Bau existiert der Slider noch
	# nicht (Programmatic-Pressed darf den Handler nie früh treffen).
	if pressed and terrain_radius_slider != null:
		terrain_radius_slider.value = radius_m


func _on_terrain_radius_changed(value: float) -> void:
	terrain_radius_label.text = "Pinsel-Größe: %d m" % int(value)
	if main.terrain_tool != null:
		main.terrain_tool.call("set_radius", value)


func _on_terrain_strength_changed(value: float) -> void:
	terrain_strength_label.text = "Stärke: %.1f m pro Sekunde" % value
	if main.terrain_tool != null:
		main.terrain_tool.call("set_strength", value)


## Terrain-Pinsel-Größe per [ / ] (Karte t_55257792): durch die 3 Presets
## Klein/Mittel/Groß zyklisch — der Preset-Button wird mit gesetzt (set_pressed
## feuert toggled → Slider + Label + Pinssel-Ring wandern mit).
## (Aus main.gd ausgezogen, Logik unverändert; Koordinator ruft weiter.)
func terrain_brush_size_step(up: bool) -> void:
	if terrain_radius_slider == null:
		return
	var next := MoveMath.brush_next_preset(float(terrain_radius_slider.value), up)
	var btn: Button = null
	match next:
		4.0:
			btn = terrain_size_btn_small
		12.0:
			btn = terrain_size_btn_medium
		32.0:
			btn = terrain_size_btn_large
	if btn != null:
		btn.set_pressed(true)   # feuert _on_terrain_size_preset → Slider/Label
	else:
		terrain_radius_slider.value = next
	main.terrain_tool.call("set_radius", next)
	main.call("_set_status", "Pinsel-Größe: %d m (mit [ / ] durch Klein/Mittel/Groß zyklisch)." % int(next))