extends SceneTree

var failures := 0


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


func _run() -> void:
	var Chart = load("res://scripts/ui/dashboard_chart.gd")
	_test_point_values(Chart)
	_test_axis_bounds(Chart)
	await _test_runtime_modes(Chart)
	quit(1 if failures > 0 else 0)


func _test_point_values(Chart: GDScript) -> void:
	var active := {"accuracy": 75, "total": 4, "questionBankRating": 1042}
	var inactive := {"accuracy": 0, "total": 0, "questionBankRating": null}
	_assert(Chart.point_value(active, "accuracy") == 75.0, "accuracy mode should expose active-day accuracy")
	_assert(Chart.point_value(inactive, "accuracy") == null, "accuracy mode should leave inactive days empty")
	_assert(Chart.point_value(active, "rating") == 1042.0, "rating mode should expose stored Elo")
	_assert(Chart.point_value(inactive, "rating") == null, "rating mode should preserve pre-baseline gaps")


func _test_axis_bounds(Chart: GDScript) -> void:
	_assert(Chart.axis_bounds([], "accuracy") == Vector2(0, 100), "accuracy should use a fixed 0-100 axis")
	var rating_points := [
		{"questionBankRating": 1000},
		{"questionBankRating": 1020}
	]
	var bounds: Vector2 = Chart.axis_bounds(rating_points, "rating")
	_assert(bounds.x < 1000 and bounds.y > 1020, "rating bounds should include padded values")
	_assert(bounds.y - bounds.x >= 100, "rating bounds should preserve a useful minimum span")


func _test_runtime_modes(Chart: GDScript) -> void:
	var chart = Chart.new()
	chart.size = Vector2(560, 190)
	root.add_child(chart)
	await process_frame
	var series := [
		{"dateUtc": "2026-07-23T00:00:00Z", "total": 2, "accuracy": 50, "questionBankRating": null},
		{"dateUtc": "2026-07-24T00:00:00Z", "total": 0, "accuracy": 0, "questionBankRating": 1000},
		{"dateUtc": "2026-07-25T00:00:00Z", "total": 1, "accuracy": 100, "questionBankRating": 1018}
	]
	chart.set_series(series, "rating", true)
	_assert(chart.mode == "rating" and chart.points.size() == 3, "chart should accept dated rating series")
	chart.set_series(series, "accuracy", false)
	_assert(chart.mode == "accuracy" and not chart.dark, "chart should switch modes and themes")
	chart.queue_free()
	await process_frame


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