extends SceneTree

var failures := 0


func _initialize() -> void:
	call_deferred("_run")


func _run() -> void:
	var service = root.get_node("ExamSimulationService")
	var theme_service = root.get_node("UIThemeService")
	var prior_dark_mode: bool = theme_service.is_dark_mode()
	service.readiness = {"ready": true, "hasActiveSimulation": true, "availableQuestions": 300, "requiredQuestions": 232}
	service.simulation = {"id": "active", "state": "between_blocks", "currentBlock": 2, "totalBlocks": 12, "createdUtc": "2026-07-16T22:04:00Z"}
	service.history = [{"id": "completed", "state": "completed", "currentBlock": 11, "totalBlocks": 12, "createdUtc": "2026-07-15T20:35:00Z", "predictedScore": 236, "rangeLow": 221, "rangeHigh": 248, "passProbability": 0.82}]
	service.history_next_cursor = "next-page"
	_assert(service._is_stale_submit_failure("submit"), "a submit failure after reaching between-block state should be ignored")
	service.simulation["state"] = "completed"
	_assert(service._is_stale_submit_failure("submit"), "a submit failure after completion should be ignored")
	_assert(not service._is_stale_submit_failure("save"), "non-submit failures should still be surfaced")
	service.simulation["state"] = "between_blocks"
	var host := Control.new()
	host.size = Vector2(1400, 800)
	root.add_child(host)
	var screen = load("res://scripts/ui/simulation_history.gd").new()
	screen.size = host.size
	host.add_child(screen)
	await process_frame
	screen._update_responsive_layout()
	screen._render_active_section()
	screen._render_history()
	await process_frame
	_assert(screen.history_list.get_child_count() == 1, "history should render completed attempts without duplicating the active simulation")
	_assert(screen.load_more_button.visible, "history should expose pagination when the API returns a cursor")
	var active_layout: BoxContainer = screen.find_child("ActiveCardLayout", true, false)
	_assert(active_layout != null and not active_layout.vertical, "wide exam screens should use the table-oriented layout")
	theme_service.set_dark_mode(false)
	await process_frame
	var light_active_box := screen.active_section.get_theme_stylebox("panel") as StyleBoxFlat
	_assert(light_active_box.bg_color.is_equal_approx(screen._section_box(false).bg_color), "the Exams page should apply its light surface after a live theme change")
	theme_service.set_dark_mode(true)
	await process_frame
	var dark_active_box := screen.active_section.get_theme_stylebox("panel") as StyleBoxFlat
	_assert(dark_active_box.bg_color.is_equal_approx(screen._section_box(true).bg_color), "the Exams page should restore its dark surface after a live theme change")
	screen.size = Vector2(760, 800)
	screen._update_responsive_layout()
	await process_frame
	active_layout = screen.find_child("ActiveCardLayout", true, false)
	_assert(active_layout != null and active_layout.vertical, "narrow exam screens should stack the active simulation card")
	_assert(not screen.table_header.visible, "narrow exam screens should replace the table header with history cards")
	host.queue_free()
	await process_frame
	theme_service.set_dark_mode(prior_dark_mode)
	quit(1 if failures > 0 else 0)


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