extends Control

@onready var exit_btn = $MarginContainer/VBoxContainer/Header/ExitButton
@onready var progress_label = $MarginContainer/VBoxContainer/Header/ProgressLabel
@onready var score_label = $MarginContainer/VBoxContainer/ScorePanel/ScoreLabel
@onready var card_container = $MarginContainer/VBoxContainer/CardContainer

var quiz_session: QuizSession
var current_card_display: Node

const FlashcardDisplayScene = preload("res://scenes/ui/quiz_mode/flashcard_display.tscn")
const MultipleChoiceDisplayScene = preload("res://scenes/ui/quiz_mode/multiple_choice_display.tscn")

func _ready() -> void:
	exit_btn.pressed.connect(_on_exit_pressed)

func start_quiz(deck: Deck) -> void:
	if not deck or deck.cards.is_empty():
		push_error("Cannot start quiz with empty or null deck")
		return

	quiz_session = QuizSession.new()
	quiz_session.question_answered.connect(_on_question_answered)
	quiz_session.session_completed.connect(_on_session_completed)
	quiz_session.progress_updated.connect(_on_progress_updated)
	quiz_session.start_session(deck, true)

	var progress = DataManager.get_or_create_progress(deck.id)
	progress.start_session()
	DataManager.save_progress()

	_show_next_card()
	_update_ui()

func _show_next_card() -> void:
	var card = quiz_session.get_current_card()

	if not card:
		return

	if current_card_display:
		current_card_display.queue_free()
		current_card_display = null

	if card.card_type == Flashcard.QuestionType.BASIC:
		current_card_display = FlashcardDisplayScene.instantiate()
	else:
		current_card_display = MultipleChoiceDisplayScene.instantiate()

	card_container.add_child(current_card_display)
	current_card_display.set_card(card)
	current_card_display.answer_submitted.connect(_on_answer_submitted)

func _on_answer_submitted(is_correct: bool) -> void:
	var card = quiz_session.get_current_card()

	if quiz_session.deck:
		DataManager.record_quiz_result(quiz_session.deck.id, card.id, is_correct)

	quiz_session.answer_question(is_correct)

func _on_question_answered(is_correct: bool, card: Flashcard) -> void:
	await get_tree().create_timer(0.5).timeout
	_update_ui()
	_show_next_card()

func _on_progress_updated(current: int, total: int) -> void:
	_update_ui()

func _on_session_completed(results: Dictionary) -> void:
	print("Quiz completed! Results:")
	print("  Total: %d" % results.total_questions)
	print("  Correct: %d" % results.correct)
	print("  Incorrect: %d" % results.incorrect)
	print("  Accuracy: %.1f%%" % results.accuracy)
	print("  Duration: %.1f seconds" % results.duration_seconds)

	await get_tree().create_timer(1.0).timeout
	GameManager.return_to_main_menu()

func _update_ui() -> void:
	if quiz_session:
		progress_label.text = "Card %d / %d" % [
			quiz_session.current_index + 1,
			quiz_session.shuffled_cards.size()
		]

		score_label.text = "Score: %d correct, %d incorrect (%.1f%%)" % [
			quiz_session.session_correct,
			quiz_session.session_incorrect,
			quiz_session.get_session_accuracy()
		]

func _on_exit_pressed() -> void:
	GameManager.return_to_main_menu()