extends RefCounted
## Headless tests for shift-result persistence (Save autoload, user:// JSON).

func _save_instance() -> Object:
	var save_script: GDScript = load("res://src/autoload/save.gd")
	return save_script.new()

func test_save_round_trip() -> bool:
	var save := _save_instance()
	var review := {
		"scenario_id": "hollywood_building",
		"reputation": {"rating": 82.5, "grade": "B"},
		"spawned_count": 7,
		"completed_at_ms": Time.get_ticks_msec(),
	}
	var err: int = save.save_shift_result(review)
	var a := TestUtils.check_eq(err, OK, "save succeeds")
	var results: Array = save.load_shift_results()
	var b := TestUtils.check(results.size() > 0, "history non-empty after save")
	var last: Dictionary = results[results.size() - 1]
	var c := TestUtils.check_eq(last.get("scenario_id", ""), "hollywood_building", "round-trips scenario id")
	var d := TestUtils.check_eq(float(last.get("reputation", {}).get("rating", 0.0)), 82.5, "round-trips rating")
	save.free()
	return a and b and c and d

func test_load_returns_array_when_empty_or_missing() -> bool:
	# The tester home may already contain results; this only asserts shape safety.
	var save := _save_instance()
	var results: Array = save.load_shift_results()
	var ok := TestUtils.check(results is Array, "load_shift_results always returns Array")
	save.free()
	return ok

func test_settings_round_trip() -> bool:
	var save := _save_instance()
	var err: int = save.save_settings({"look_sensitivity": 0.0035, "hud_font_scale": 1.25})
	var a := TestUtils.check_eq(err, OK, "save_settings succeeds")
	var loaded: Dictionary = save.load_settings()
	var b := TestUtils.check(is_equal_approx(float(loaded.get("look_sensitivity", 0.0)), 0.0035), "round-trips sensitivity")
	var c := TestUtils.check(is_equal_approx(float(loaded.get("hud_font_scale", 0.0)), 1.25), "round-trips font scale")
	# Restore defaults so later runs are not affected.
	save.save_settings(save.DEFAULT_SETTINGS)
	save.free()
	return a and b and c

func test_settings_defaults_present() -> bool:
	var save := _save_instance()
	var defaults: Dictionary = save.load_settings()
	var ok := TestUtils.check(
		defaults.has("look_sensitivity") and defaults.has("hud_font_scale"),
		"settings have documented defaults")
	save.free()
	return ok