class_name InGameEditor
extends Control
## In-game "build mode" UI (docs/architecture/editor.md §7.2 `InGameEditor`).
##
## Built entirely from `Control` nodes in code (matching this codebase's
## existing convention for dynamic UI -- see `game.gd`'s `_show_build_stamp`
## / `_show_status`) rather than a hand-authored `.tscn`, so there is one
## fewer place for a scene-file/script mismatch to hide. It is only ever
## instantiated when the player enters build mode (see `game.gd`'s
## `_toggle_build_mode`), so it costs nothing during normal play.
##
## Composition matches the doc exactly:
##   EditorToolbar   -- tool mode switcher
##   PalettePanel    -- catalog-sourced object palette
##   EditorViewport   -- the 2D tile/object canvas
##   InspectorPanel  -- property editor for the selected object
##   EditorCore      -- shared core (passed in, not owned/created here)
##
## This UI (and `EditorCore`) never talk to the network -- persisting edits
## is a sibling task's job (world_persistence_impl.md's batch-PUT save
## path). Closing this editor just discards the UI; the in-memory
## `ChunkEditorModel` it was pointed at is unaffected either way.

signal closed

var core: EditorCore

var _toolbar: EditorToolbar
var _palette: PalettePanel
var _inspector: InspectorPanel
var _viewport: EditorViewport
var _close_button: Button


func _init(p_core: EditorCore) -> void:
	core = p_core
	name = "InGameEditor"
	set_anchors_preset(Control.PRESET_FULL_RECT)
	mouse_filter = Control.MOUSE_FILTER_STOP


func _ready() -> void:
	_build_ui()
	_refresh_history_buttons()


func _build_ui() -> void:
	var bg := ColorRect.new()
	bg.color = Color(0.08, 0.08, 0.09, 0.96)
	bg.set_anchors_preset(Control.PRESET_FULL_RECT)
	bg.mouse_filter = Control.MOUSE_FILTER_IGNORE
	add_child(bg)

	var root_vbox := VBoxContainer.new()
	root_vbox.set_anchors_preset(Control.PRESET_FULL_RECT)
	root_vbox.offset_left = 12
	root_vbox.offset_top = 12
	root_vbox.offset_right = -12
	root_vbox.offset_bottom = -12
	add_child(root_vbox)

	var top_bar := HBoxContainer.new()
	root_vbox.add_child(top_bar)

	_toolbar = EditorToolbar.new()
	_toolbar.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	top_bar.add_child(_toolbar)

	_close_button = Button.new()
	_close_button.text = "Close (F2)"
	_close_button.pressed.connect(_on_close_pressed)
	top_bar.add_child(_close_button)

	var body := HBoxContainer.new()
	body.size_flags_vertical = Control.SIZE_EXPAND_FILL
	root_vbox.add_child(body)

	var viewport_scroll := ScrollContainer.new()
	viewport_scroll.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	viewport_scroll.size_flags_vertical = Control.SIZE_EXPAND_FILL
	body.add_child(viewport_scroll)

	_viewport = EditorViewport.new()
	viewport_scroll.add_child(_viewport)

	var sidebar := VBoxContainer.new()
	sidebar.custom_minimum_size = Vector2(240, 0)
	body.add_child(sidebar)

	_palette = PalettePanel.new()
	sidebar.add_child(_palette)

	_inspector = InspectorPanel.new()
	sidebar.add_child(_inspector)

	_viewport.setup(core, 0)
	_palette.set_catalog(core.catalog)
	_inspector.setup(core)

	_toolbar.set_active_tool(core.tools.get_active_tool_id())
	_toolbar.tool_selected.connect(_on_tool_selected)
	_toolbar.undo_pressed.connect(_on_undo_pressed)
	_toolbar.redo_pressed.connect(_on_redo_pressed)
	_palette.object_selected.connect(_on_palette_object_selected)
	_inspector.delete_requested.connect(_on_inspector_delete_requested)
	_viewport.edit_applied.connect(_on_edit_applied)
	core.selection.selection_changed.connect(_on_selection_changed)


func _unhandled_key_input(event: InputEvent) -> void:
	if not (event is InputEventKey):
		return
	var key := event as InputEventKey
	if not key.pressed or key.echo:
		return
	if key.ctrl_pressed and key.keycode == KEY_Z:
		_on_undo_pressed()
		get_viewport().set_input_as_handled()
	elif key.ctrl_pressed and key.keycode == KEY_Y:
		_on_redo_pressed()
		get_viewport().set_input_as_handled()
	elif key.keycode == KEY_DELETE and core.selection.has_selection():
		core.delete_object(core.selection.get_selected())
		_on_edit_applied()
		get_viewport().set_input_as_handled()


func _on_tool_selected(tool_id: String) -> void:
	core.tools.set_active_tool(tool_id)


func _on_palette_object_selected(catalog_id: String) -> void:
	_viewport.pending_catalog_id = catalog_id
	core.tools.set_active_tool("object_place")
	_toolbar.set_active_tool("object_place")


func _on_inspector_delete_requested(object_id: String) -> void:
	core.delete_object(object_id)
	_on_edit_applied()


func _on_undo_pressed() -> void:
	core.undo()
	_on_edit_applied()


func _on_redo_pressed() -> void:
	core.redo()
	_on_edit_applied()


func _on_edit_applied() -> void:
	_viewport.queue_redraw()
	_inspector.show_object(core.selection.get_selected())
	_refresh_history_buttons()


func _on_selection_changed(object_id: String) -> void:
	_inspector.show_object(object_id)


func _refresh_history_buttons() -> void:
	_toolbar.set_history_state(core.undo_redo.can_undo(), core.undo_redo.can_redo())


func _on_close_pressed() -> void:
	closed.emit()
	queue_free()