extends Control
class_name DeckHolderRenderer

## Renderer class for [DeckHolder]
##
## Entry point for the [GraphEdit] based Renderer

## Reference to the base scene for [DeckRendererGraphEdit]
const DECK_SCENE := preload("res://graph_node_renderer/deck_renderer_graph_edit.tscn")

## Reference to the main windows [TabContainerCustom]
@onready var tab_container: TabContainerCustom = %TabContainerCustom as TabContainerCustom
## Reference to the [FileDialog] used for File operations through the program.
@onready var file_dialog: FileDialog = $FileDialog

## Enum for storing the Options in the "File" PopupMenu.
enum FileMenuId {
	NEW,
	OPEN,
	SAVE = 3,
	SAVE_AS,
	CLOSE = 6,
}

## Weak Reference to the Deck that is currently going to be saved.
var _deck_to_save: WeakRef


func _ready() -> void:
	tab_container.add_button_pressed.connect(add_empty_deck)

	tab_container.tab_close_requested.connect(
		func(tab: int):
			DeckHolder.close_deck(tab_container.get_tab_metadata(tab))
			tab_container.close_tab(tab)
	)

	file_dialog.canceled.connect(disconnect_file_dialog_signals)

## Called when the File button in the [MenuBar] is pressed with the [param id]
## of the button within it that was pressed.
func _on_file_id_pressed(id: int) -> void:
	match id:
		FileMenuId.NEW:
			add_empty_deck()
		FileMenuId.OPEN:
			open_open_dialog("res://")
		FileMenuId.SAVE:
			save_active_deck()
		FileMenuId.SAVE_AS:
			open_save_dialog("res://")
		FileMenuId.CLOSE:
			close_current_tab()

## Adds an empty [DeckRendererGraphEdit] with a corresponding [Deck] for it's data.
func add_empty_deck() -> void:
	var deck := DeckHolder.add_empty_deck()
	var inst: DeckRendererGraphEdit = DECK_SCENE.instantiate()
	inst.deck = deck
	tab_container.add_content(inst, "Deck %s" % (tab_container.get_tab_count() + 1))
	tab_container.set_tab_metadata(tab_container.get_current_tab(), deck)
	inst.group_enter_requested.connect(_on_deck_renderer_group_enter_requested.bind(deck))

## Closes the current tab in [member tab_container]
func close_current_tab() -> void:
	tab_container.close_tab(tab_container.get_current_tab())

## Opens [member file_dialog] with the mode [member FileDialog.FILE_MODE_SAVE_FILE]
## as well as getting a weakref to the active [Deck]
func open_save_dialog(path: String) -> void:
	file_dialog.file_mode = FileDialog.FILE_MODE_SAVE_FILE
	file_dialog.title = "Save a Deck"
	file_dialog.current_path = path
	_deck_to_save = weakref(get_active_deck())
	file_dialog.popup_centered()
	file_dialog.file_selected.connect(_on_file_dialog_save_file, CONNECT_ONE_SHOT)

## Opens [member file_dialog] with the mode [FileDialog.FILE_MODE_OPEN_FILES]
## with the supplied [param path]
func open_open_dialog(path: String) -> void:
	file_dialog.file_mode = FileDialog.FILE_MODE_OPEN_FILES
	file_dialog.title = "Open Deck(s)"
	file_dialog.current_path = path
	file_dialog.popup_centered()
	file_dialog.files_selected.connect(_on_file_dialog_open_files, CONNECT_ONE_SHOT)

## Connected to [signal FileDialog.save_file] on [member file_dialog].
## Saves the selected [Deck] if it still exists.
func _on_file_dialog_save_file(path: String) -> void:
	var deck: Deck = _deck_to_save.get_ref() as Deck
	if !deck:
		return

	deck.save_path = path
	var json := JSON.stringify(deck.to_dict(), "\t")
	var f := FileAccess.open(path, FileAccess.WRITE)
	f.store_string(json)

## Connected to [signal FileDialog.open_files] on [member file_dialog].  Opens
## the selected paths, instantiating [DeckRenderGraphEdit]s and [Deck]s for each.
func _on_file_dialog_open_files(paths: PackedStringArray) -> void:
	for path in paths:
		var deck := DeckHolder.open_deck_from_file(path)
		var inst: DeckRendererGraphEdit = DECK_SCENE.instantiate()
		inst.deck = deck
		tab_container.add_content(inst, "Deck %s" % (tab_container.get_tab_count() + 1))
		inst.initialize_from_deck()
		inst.group_enter_requested.connect(_on_deck_renderer_group_enter_requested.bind(deck))

## Gets the currently active [Deck] from [member tab_container]
func get_active_deck() -> Deck:
	if tab_container.is_empty():
		return null

	return (tab_container.get_content(tab_container.get_current_tab()) as DeckRendererGraphEdit).deck

## Saves the active [Deck] in [member tab_container]
func save_active_deck() -> void:
	if get_active_deck().save_path.is_empty():
		open_save_dialog("res://")
	else:
		var json := JSON.stringify(get_active_deck().to_dict(), "\t")
		var f := FileAccess.open(get_active_deck().save_path, FileAccess.WRITE)
		f.store_string(json)

## Disconnects the [FileDialog] signals if they are already connected.
func disconnect_file_dialog_signals() -> void:
	if file_dialog.file_selected.is_connected(_on_file_dialog_save_file):
		file_dialog.file_selected.disconnect(_on_file_dialog_save_file)

	if file_dialog.files_selected.is_connected(_on_file_dialog_open_files):
		file_dialog.files_selected.disconnect(_on_file_dialog_open_files)

## Connected to [signal DeckRenderGraphEdit.group_entered_request] to allow entering
## groups based off the given [param group_id] and [param deck].  As well as adding
## a corresponding tab to [member tab_container]
func _on_deck_renderer_group_enter_requested(group_id: String, deck: Deck) -> void:
	var group_deck := deck.get_group(group_id)
	var deck_renderer: DeckRendererGraphEdit = DECK_SCENE.instantiate()
	deck_renderer.deck = group_deck
	deck_renderer.initialize_from_deck()
	tab_container.add_content(deck_renderer, "Group %s" % (tab_container.get_tab_count() + 1))
	tab_container.set_tab_metadata(tab_container.get_current_tab(), group_deck)
	deck_renderer.group_enter_requested.connect(_on_deck_renderer_group_enter_requested.bind(deck_renderer.deck))