@tool
class_name BaseViewer
extends PanelContainer

# Base class for all viewer panels (WeaponViewer, BulletViewer, ItemViewer, EnemyViewer)
# Provides common functionality for resource loading, filtering, and UI building

var _editor_interface: EditorInterface
var _grid_container: HFlowContainer
var _dock: PanelContainer
var _show_2d_checkbox: CheckBox
var _show_3d_checkbox: CheckBox

func setup(editor_interface: EditorInterface, dock: PanelContainer = null) -> void:
	_editor_interface = editor_interface
	_dock = dock
	_load_filter_settings()
	call_deferred("refresh")

func _ready() -> void:
	_build_ui()
	call_deferred("refresh")

func _build_ui() -> void:
	var margin = MarginContainer.new()
	margin.add_theme_constant_override("margin_left", 8)
	margin.add_theme_constant_override("margin_top", 8)
	margin.add_theme_constant_override("margin_right", 8)
	margin.add_theme_constant_override("margin_bottom", 8)
	add_child(margin)
	
	var vbox = VBoxContainer.new()
	vbox.add_theme_constant_override("separation", 8)
	margin.add_child(vbox)
	
	# Header with create buttons and filters
	var header_hbox = HBoxContainer.new()
	vbox.add_child(header_hbox)
	
	_build_header_buttons(header_hbox)
	
	var spacer = Control.new()
	spacer.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	header_hbox.add_child(spacer)
	
	if _supports_2d_3d_filter():
		_show_2d_checkbox = CheckBox.new()
		_show_2d_checkbox.text = "2D"
		_show_2d_checkbox.button_pressed = true
		_show_2d_checkbox.toggled.connect(_on_filter_changed)
		header_hbox.add_child(_show_2d_checkbox)
		
		_show_3d_checkbox = CheckBox.new()
		_show_3d_checkbox.text = "3D"
		_show_3d_checkbox.button_pressed = true
		_show_3d_checkbox.toggled.connect(_on_filter_changed)
		header_hbox.add_child(_show_3d_checkbox)
	
	var refresh_button = Button.new()
	refresh_button.text = "Refresh"
	refresh_button.pressed.connect(refresh)
	header_hbox.add_child(refresh_button)
	
	vbox.add_child(HSeparator.new())
	
	# Scroll container for grid
	var scroll = ScrollContainer.new()
	scroll.size_flags_vertical = Control.SIZE_EXPAND_FILL
	scroll.horizontal_scroll_mode = ScrollContainer.SCROLL_MODE_DISABLED
	vbox.add_child(scroll)
	
	_grid_container = HFlowContainer.new()
	_grid_container.size_flags_horizontal = Control.SIZE_EXPAND_FILL
	_grid_container.add_theme_constant_override("h_separation", 8)
	_grid_container.add_theme_constant_override("v_separation", 8)
	scroll.add_child(_grid_container)

# Override in derived classes to add create buttons
func _build_header_buttons(header_hbox: HBoxContainer) -> void:
	pass

# Override in derived classes if they support 2D/3D filtering
func _supports_2d_3d_filter() -> bool:
	return false

# Override in derived classes to implement refresh logic
func refresh() -> void:
	if not _grid_container:
		return
	_clear_grid()

func _clear_grid() -> void:
	if not _grid_container:
		return
	for child in _grid_container.get_children():
		child.queue_free()

func _on_filter_changed(_toggled: bool) -> void:
	_save_filter_settings()
	refresh()

# Override these in derived classes for specific filter settings
func _get_filter_setting_2d_key() -> String:
	return ""

func _get_filter_setting_3d_key() -> String:
	return ""

func _load_filter_settings() -> void:
	if not _supports_2d_3d_filter():
		return
	
	if _show_2d_checkbox:
		_show_2d_checkbox.button_pressed = _load_filter_setting(_get_filter_setting_2d_key(), true)
	if _show_3d_checkbox:
		_show_3d_checkbox.button_pressed = _load_filter_setting(_get_filter_setting_3d_key(), true)

func _save_filter_settings() -> void:
	if not _supports_2d_3d_filter():
		return
	
	if not _editor_interface:
		return
	
	var editor_settings = _editor_interface.get_editor_settings()
	if editor_settings:
		if _show_2d_checkbox:
			editor_settings.set_setting(_get_filter_setting_2d_key(), _show_2d_checkbox.button_pressed)
		if _show_3d_checkbox:
			editor_settings.set_setting(_get_filter_setting_3d_key(), _show_3d_checkbox.button_pressed)

func _load_filter_setting(key: String, default_value: bool) -> bool:
	if not _editor_interface or key.is_empty():
		return default_value
	var editor_settings = _editor_interface.get_editor_settings()
	if editor_settings and editor_settings.has_setting(key):
		return editor_settings.get_setting(key)
	return default_value

# Utility functions for adding labels to the grid
func _add_error_label(text: String) -> void:
	var label = Label.new()
	label.text = text
	label.add_theme_color_override("font_color", Color.RED)
	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	if _grid_container:
		_grid_container.add_child(label)

func _add_info_label(text: String) -> void:
	var label = Label.new()
	label.text = text
	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	if _grid_container:
		_grid_container.add_child(label)

func _add_warning_label(text: String) -> void:
	var label = Label.new()
	label.text = text
	label.add_theme_color_override("font_color", Color.ORANGE)
	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
	if _grid_container:
		_grid_container.add_child(label)

# Check if 2D should be shown based on filter
func _should_show_2d() -> bool:
	return _show_2d_checkbox == null or _show_2d_checkbox.button_pressed

# Check if 3D should be shown based on filter
func _should_show_3d() -> bool:
	return _show_3d_checkbox == null or _show_3d_checkbox.button_pressed

# Utility to log to dock
func _log_to_dock(message: String, color: Color = Color.WHITE) -> void:
	if _dock and _dock.has_method("add_log"):
		_dock.call("add_log", message, color)