extends VBoxContainer

const Brand := preload("res://scripts/ui/medmind_style.gd")

var main: Control
var title_label: Label
var summary_label: Label
var status_label: Label
var another_button: Button
var results_panel: PanelContainer
var dashboard_button: Button
var launch_pending := false
var latest_remaining := 0


func _ready() -> void:
	set_anchors_and_offsets_preset(Control.PRESET_FULL_RECT)
	alignment = BoxContainer.ALIGNMENT_CENTER
	add_theme_constant_override("separation", 18)
	UIThemeService.theme_changed.connect(_apply_theme)
	ReviewQueueService.question_loaded.connect(_on_question_loaded)
	ReviewQueueService.question_failed.connect(_on_question_failed)
	ReviewQueueService.pass_completed.connect(_on_pass_completed)
	ReviewQueueService.attempt_synced.connect(_on_attempt_synced)

	var spacer := Control.new()
	spacer.size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_child(spacer)
	results_panel = PanelContainer.new()
	results_panel.custom_minimum_size = Vector2(520, 0)
	results_panel.size_flags_horizontal = Control.SIZE_SHRINK_CENTER
	add_child(results_panel)
	var content := VBoxContainer.new()
	content.add_theme_constant_override("separation", 16)
	results_panel.add_child(content)
	title_label = _label("Review pass complete", 28, true)
	content.add_child(title_label)
	summary_label = _label("", 17)
	summary_label.autowrap_mode = TextServer.AUTOWRAP_WORD_SMART
	content.add_child(summary_label)
	status_label = _label("", 14)
	status_label.visible = false
	content.add_child(status_label)
	another_button = Button.new()
	another_button.text = "Start Another Review"
	another_button.custom_minimum_size.y = 46
	another_button.pressed.connect(_start_another)
	content.add_child(another_button)
	dashboard_button = Button.new()
	dashboard_button.text = "Back to Dashboard"
	dashboard_button.custom_minimum_size.y = 46
	dashboard_button.pressed.connect(_back_to_dashboard)
	content.add_child(dashboard_button)
	var bottom_spacer := Control.new()
	bottom_spacer.size_flags_vertical = Control.SIZE_EXPAND_FILL
	add_child(bottom_spacer)
	_apply_theme()


func on_show(payload: Variant = null) -> void:
	var summary: Dictionary = payload if typeof(payload) == TYPE_DICTIONARY else ReviewQueueService.get_summary()
	var reviewed := int(summary.get("reviewed", 0))
	var cleared := int(summary.get("cleared", 0))
	var remaining := int(summary.get("remaining", 0))
	latest_remaining = remaining
	summary_label.text = "Reviewed %d question%s\nCleared %d from the queue\n%d still need%s review" % [
		reviewed,
		"" if reviewed == 1 else "s",
		cleared,
		remaining,
		"s" if remaining == 1 else ""
	]
	another_button.disabled = remaining <= 0 or ReviewQueueService.has_pending_submissions()
	status_label.text = "Saving your review result..." if ReviewQueueService.has_pending_submissions() else ""
	status_label.visible = not status_label.text.is_empty()
	launch_pending = false
	DashboardService.refresh()


func _start_another() -> void:
	if launch_pending:
		return
	launch_pending = true
	another_button.disabled = true
	status_label.text = "Preparing another review pass..."
	status_label.visible = true
	if not StudySessionService.session_started.is_connected(_on_review_session_started):
		StudySessionService.session_started.connect(_on_review_session_started)
	if not StudySessionService.session_failed.is_connected(_on_review_session_failed):
		StudySessionService.session_failed.connect(_on_review_session_failed)
	StudySessionService.start("due_reviews", 20, "Tutor")


func _on_review_session_started() -> void:
	if launch_pending and visible:
		ReviewQueueService.start_pass("", int(StudySessionService.progress.get("targetValue", 20)))


func _on_review_session_failed(message: String) -> void:
	if launch_pending and visible:
		_on_question_failed(message)


func _on_question_loaded(question: Dictionary) -> void:
	if not launch_pending or not visible:
		return
	launch_pending = false
	if BlockSessionService.start_review_question(question):
		main.show_screen("player")
	else:
		_on_question_failed("The review question could not be prepared.")


func _on_question_failed(message: String) -> void:
	if not launch_pending or not visible:
		return
	launch_pending = false
	another_button.disabled = false
	status_label.text = message
	status_label.visible = true


func _on_pass_completed(summary: Dictionary) -> void:
	if not launch_pending or not visible:
		return
	launch_pending = false
	on_show(summary)


func _on_attempt_synced(_question_id: String, _is_correct: bool, server_pending_count: int) -> void:
	if not visible:
		return
	var summary := ReviewQueueService.get_summary()
	summary["remaining"] = server_pending_count
	on_show(summary)


func _back_to_dashboard() -> void:
	main.show_screen("dashboard")


func _apply_theme(_dark: bool = UIThemeService.is_dark_mode()) -> void:
	var dark := UIThemeService.is_dark_mode()
	if results_panel != null:
		results_panel.add_theme_stylebox_override("panel", Brand.panel_box(dark))
	for label in [title_label, summary_label]:
		if label != null:
			label.add_theme_color_override("font_color", Brand.text_color(dark))
	if status_label != null:
		status_label.add_theme_color_override("font_color", Brand.muted_color(dark))
	if another_button != null:
		another_button.add_theme_stylebox_override("normal", Brand.secondary_button_box(dark))
	if dashboard_button != null:
		dashboard_button.add_theme_stylebox_override("normal", Brand.secondary_button_box(dark))


func _label(text: String, font_size: int, bold: bool = false) -> Label:
	var label := Label.new()
	label.text = text
	label.add_theme_font_override("font", Brand.font)
	label.add_theme_font_size_override("font_size", font_size)
	label.add_theme_color_override("font_color", Brand.text_color(UIThemeService.is_dark_mode()))
	if bold:
		label.add_theme_constant_override("outline_size", 0)
	return label