extends SceneTree

var failures := 0


func _initialize() -> void:
	_test_reference_normalization()
	_test_reference_url_filter()
	_test_correct_feedback_does_not_auto_advance()
	_test_correct_review_locks_answer_interactions()
	_test_eliminated_choice_uses_rich_text_strikeout()
	_test_explanation_highlighting_has_no_status_heading()
	_test_collapsed_followup_review_expands()
	quit(1 if failures > 0 else 0)


func _test_reference_normalization() -> void:
	var service = load("res://scripts/autoload/question_bank_service.gd").new()
	var references: Array = service._normalize_references([{
		"Title": "Clinical guideline",
		"Publisher": "Example Society",
		"Url": "https://example.org/guideline",
		"Supports": "Recommended management",
		"AccessedOn": "2026-07-14",
		"Reviewer": "reviewer"
	}])
	_assert(references.size() == 1, "a structured reference should be retained")
	_assert(references[0].get("title", "") == "Clinical guideline", "reference title should be normalized")
	_assert(references[0].get("accessed_on", "") == "2026-07-14", "reference access date should be normalized")
	service.free()


func _test_reference_url_filter() -> void:
	var player = load("res://scripts/ui/question_player.gd").new()
	_assert(player._is_safe_reference_url("https://example.org/source"), "HTTPS references should be accepted")
	_assert(not player._is_safe_reference_url("http://example.org/source"), "HTTP references should be rejected")
	_assert(not player._is_safe_reference_url("javascript:alert(1)"), "script URLs should be rejected")
	player.references_container = VBoxContainer.new()
	player._show_references([
		{"title": "Clinical guideline", "publisher": "Example Society", "url": "https://example.org/source"},
		{"title": "Unsafe", "publisher": "Example", "url": "http://example.org/source"}
	])
	_assert(player.references_container.visible, "valid references should show the references section")
	_assert(player.references_container.get_child_count() == 2, "the section should contain a heading and one safe link")
	var link := player.references_container.get_child(1) as LinkButton
	_assert(link != null and link.text == "Clinical guideline - Example Society", "reference link text should identify its source")
	player.references_container.free()
	player.free()


func _test_correct_feedback_does_not_auto_advance() -> void:
	var player = load("res://scripts/ui/question_player.gd").new()
	player.next_button = Button.new()
	player.skip_button = Button.new()
	player.feedback_fog = ColorRect.new()
	player.pending_correct_advance = false
	player._trigger_correct_feedback()
	_assert(not player.pending_correct_advance, "correct feedback must not schedule automatic advancement")
	player.next_button.free()
	player.skip_button.free()
	player.feedback_fog.free()
	player.free()


func _test_correct_review_locks_answer_interactions() -> void:
	var player = load("res://scripts/ui/question_player.gd").new()
	player.current_answer = {"is_correct": true}
	player.selected_choice = "A"
	player.presented_choices = [{"id": "A", "text": "First"}, {"id": "B", "text": "Second"}]
	player._select_choice(1)
	_assert(player.selected_choice == "A", "correct review should reject answer selection changes")
	var right_click := InputEventMouseButton.new()
	right_click.button_index = MOUSE_BUTTON_RIGHT
	right_click.pressed = true
	player._choice_gui_input(right_click, 1)
	_assert(player.eliminated.is_empty(), "correct review should reject answer strike-through changes")
	player.free()


func _test_eliminated_choice_uses_rich_text_strikeout() -> void:
	var player = load("res://scripts/ui/question_player.gd").new()
	player.choice_buttons.append(Button.new())
	player.choice_percent_labels.append(Label.new())
	var strike_label := RichTextLabel.new()
	strike_label.bbcode_enabled = true
	player.choice_top_labels.append(strike_label)
	player.choice_followup_panels.append(PanelContainer.new())
	player.eliminated = ["A"]
	player.presented_choices = [{"id": "A", "text": "Observation only"}]
	player._set_choice_button_text(0, player.presented_choices[0])
	_assert(player.choice_buttons[0].text == "", "eliminated choice should not use combining characters in button text")
	_assert(strike_label.text == "[s]A. Observation only[/s]", "eliminated choice should use native rich-text strikeout")
	_assert(not "[eliminated]" in strike_label.text, "eliminated choice should not include a redundant label")
	player.choice_buttons[0].free()
	player.choice_percent_labels[0].free()
	strike_label.free()
	player.choice_followup_panels[0].free()
	player.free()


func _test_explanation_highlighting_has_no_status_heading() -> void:
	var player = load("res://scripts/ui/question_player.gd").new()
	player.explanation_label = RichTextLabel.new()
	player.explanation_label.bbcode_enabled = true
	player.explanation_plain_text = "The key finding supports observation."
	player.explanation_highlights[""] = [{"start": 4, "end": 15}]
	player._render_explanation()
	_assert(not player.explanation_label.text.begins_with("[b]Correct"), "explanation should not repeat the inferred correct status")
	_assert("[bgcolor=yellow]" in player.explanation_label.text, "explanation text should support highlighting")
	player.explanation_label.free()
	player.free()


func _test_collapsed_followup_review_expands() -> void:
	var player = load("res://scripts/ui/question_player.gd").new()
	var panel := PanelContainer.new()
	var content := VBoxContainer.new()
	panel.add_child(content)
	player.choice_buttons.append(Button.new())
	player.choice_percent_labels.append(Label.new())
	player.choice_top_labels.append(RichTextLabel.new())
	player.choice_followup_panels.append(panel)
	player.choice_followup_contents.append(content)
	player.next_button = Button.new()
	player.presented_choices = [{"id": "B", "text": "Wrong answer"}]
	player.followup_states["B"] = {
		"choice_id": "B", "choice_text": "Wrong answer", "prompt": "Why?",
		"selected_option_text": "Finding", "was_correct": false,
		"teaching_point": "Review the finding.", "resolved": true, "collapsed": true
	}
	player._render_followup_state("B")
	var review_button := content.get_child(0) as Button
	_assert(review_button != null, "collapsed follow-up should render a review button")
	review_button.pressed.emit()
	_assert(not bool(player.followup_states["B"].get("collapsed", true)), "review button should expand the resolved follow-up")
	player.choice_buttons[0].free()
	player.choice_percent_labels[0].free()
	player.choice_top_labels[0].free()
	player.next_button.free()
	panel.free()
	player.free()


func _assert(condition: bool, message: String) -> void:
	if condition:
		return
	failures += 1
	push_error(message)