class_name FacilityCleaningPolicy
extends RefCounted

## Approved trial values live in data, never in scheduler defaults.
var last_error := ""
var _values: Dictionary = {}

func load_file(path: String = "res://data/environment/cleaning_policy.json") -> bool:
	var parsed: Variant = JSON.parse_string(FileAccess.get_file_as_string(path))
	if not parsed is Dictionary:
		last_error = "Cleaning policy must be a JSON object"
		return false
	return configure(parsed)

func configure(values: Dictionary) -> bool:
	var keys := ["schema_version", "initial_cleanliness", "maximum_cleanliness", "clean_at_or_below", "work_minutes", "recovery_per_completed_task"]
	if values.size() != keys.size():
		last_error = "Unexpected cleaning policy fields"
		return false
	var candidate: Dictionary = {}
	for key: String in keys:
		var value: Variant = values.get(key)
		# JSON numbers arrive as floats; accept only finite exact small integers.
		if typeof(value) not in [TYPE_INT, TYPE_FLOAT] or not is_finite(float(value)) or float(value) != floor(float(value)) or float(value) < 0 or float(value) > 2147483647:
			last_error = "Invalid cleaning policy integer: " + key
			return false
		candidate[key] = int(value)
	if candidate["schema_version"] != 1 or candidate["maximum_cleanliness"] <= 0 or candidate["initial_cleanliness"] > candidate["maximum_cleanliness"] or candidate["clean_at_or_below"] >= candidate["maximum_cleanliness"] or candidate["work_minutes"] <= 0 or candidate["recovery_per_completed_task"] <= 0:
		last_error = "Invalid cleaning policy bounds"
		return false
	_values = candidate
	last_error = ""
	return true

func create_snapshot() -> Dictionary:
	return _values.duplicate(true)