class_name Main
extends Control

@onready var note_page: NotePage = %NotePage
@onready var edit_note_page: EditNotePage = %EditNotePage
@onready var save_manager = $Utils/SaveManager

var editing: bool = false :
	set(value):
		editing = value
		note_page.visible = not editing
		edit_note_page.visible = editing

var notes: Array[Note] = []
var previous_notes: Array[Note] = []
var current_note: Note


func display_page() -> void:
	var note_title = current_note.title if current_note else "Главная"
	var display_notes = notes.filter(func (note): return note.parent_id == (current_note.id if current_note else ""))
	if editing:
		edit_note_page.display(
			current_note.id if current_note else "",
			note_title,
			display_notes
		)
	else:
		note_page.display(note_title, display_notes)


func _ready():
	save_manager.load_data()
	
	display_page()


func _on_note_page_back_pressed():
	current_note = previous_notes.pop_back()
	note_page.back_button.disabled = previous_notes.size() == 0
	display_page()


func _on_note_page_edit_pressed():
	editing = true
	display_page()


func _on_note_page_note_pressed(note: Note) -> void:
	previous_notes.append(current_note)
	current_note = note
	note_page.back_button.disabled = false
	display_page()


func _on_save_manager_load_notes(loaded_notes):
	editing = false
	notes = loaded_notes
	print(loaded_notes)
	display_page()


func _on_edit_button_pressed():
	editing = true
	display_page()


func _on_edit_note_page_canceled():
	editing = false


func _on_edit_note_page_saved(changed_notes: Array[ChangeNote]):
	editing = false
	for changed_note in changed_notes:
		match changed_note.kind:
			ChangeNote.Kind.ADDED:
				if changed_note.note.title.strip_edges():
					notes.append(changed_note.note)
			ChangeNote.Kind.DELETED:
				notes.erase(changed_note.note)
	display_page()
	save_manager.save_data(notes)


func _notification(what: int) -> void:
	match what:
		NOTIFICATION_WM_GO_BACK_REQUEST:
			if editing:
				editing = false
			elif previous_notes.size():
				_on_note_page_back_pressed()
			else:
				get_tree().quit()