extends RefCounted

## Read-only presentation. Counts refer to people, never storage capacity.
static func describe(instance: Variant) -> Dictionary:
	if instance == null:
		return {}
	var ids: Array[StringName] = []
	for service: Variant in instance.active_services.values():
		for id: StringName in service.guest_ids:
			if not ids.has(id):
				ids.append(id)
	ids.sort_custom(func(a: StringName, b: StringName) -> bool: return String(a) < String(b))
	return {&"state": int(instance.state), &"state_name": FacilityInstance.State.keys()[instance.state],
		&"reasons": instance.state_reasons.duplicate(),
		&"operation": int(instance.operation_state), &"people": ids,
		&"count": ids.size(), &"limit": int(instance.customer_capacity),
		&"staff": instance.active_staff_ids.duplicate(), &"suspension": StringName(instance.suspension_reason)}


static func slots(rect: Rect2, p: float, id: StringName) -> Array[Vector2]:
	# Each anchor owns a 16x18 person footprint. Overflow is reported as a count,
	# not drawn on top of another person. Furniture uses these same anchors.
	var result: Array[Vector2] = []
	var step := 20.0 if id in [&"cafeteria", &"tavern"] else 16.0
	var columns := maxi(int(rect.size.x / p / step), 1)
	var rows := maxi(int((rect.size.y / p - 10.0) / 20.0), 1)
	if id == &"chapel":
		columns = mini(columns, 4)
		rows = maxi(int((rect.size.y / p - 30.0) / 20.0), 1)
	for row: int in rows:
		for col: int in columns:
			if id == &"chapel" and result.size() == 8:
				return result
			result.append(Vector2(rect.position.x + (float(col) + 0.5) * rect.size.x / columns,
				rect.end.y - (4.0 + row * 20.0) * p))
	return result


static func label(data: Dictionary, visible_count: int) -> String:
	if data.is_empty():
		return ""
	var operation := int(data[&"operation"])
	if operation == FacilityInstance.OperationState.SUSPENDED:
		return "休止・摘発" if data[&"suspension"] == &"RAIDED" else "休止・破壊"
	if operation == FacilityInstance.OperationState.INACTIVE:
		return "未稼働"
	var count := int(data[&"count"])
	var limit := int(data[&"limit"])
	var value := "利用%d/%d人" % [count, limit] if limit >= 0 else "利用%d人" % count
	if limit > 0 and count >= limit:
		value = "満員 " + value
	if count > visible_count:
		value += "（他%d人）" % (count - visible_count)
	return value


static func business_label(data: Dictionary) -> String:
	if data.is_empty():
		return ""
	if int(data[&"operation"]) == FacilityInstance.OperationState.SUSPENDED:
		return "休止・摘発" if data[&"suspension"] == &"RAIDED" else "休止・破壊"
	match int(data[&"state"]):
		FacilityInstance.State.BROKEN: return "破損"
		FacilityInstance.State.NO_ACCESS: return "通路なし"
		FacilityInstance.State.NO_POWER: return "魔力なし"
		FacilityInstance.State.NO_STAFF: return "職員不足"
		FacilityInstance.State.CLOSED: return "営業停止"
		FacilityInstance.State.DEGRADED: return "低下運転"
		FacilityInstance.State.OPEN: return "営業中"
	return String(data[&"state_name"])


static func queue_label(count: int, overflow: int) -> String:
	return "待ち%d人" % count + ("（他%d人）" % overflow if overflow > 0 else "")


static func elevator_label(shaft: Dictionary) -> String:
	var count := (shaft[&"boarded"] as Array).size()
	var capacity := int(shaft[&"capacity"])
	var value := "%d/%d人" % [count, capacity]
	if capacity > 0 and count >= capacity:
		value = "満員 " + value
	if not bool(shaft[&"operational"]):
		value = "停止 " + value
	else:
		value = "運転 " + value
	var phase := String(shaft.get(&"phase", &"IDLE"))
	var doors_open := bool(shaft[&"operational"]) and phase in ["IDLE", "BOARDING", "ALIGHTING"]
	return value + (" 開 " if doors_open else " 閉 ") + phase


static func supply_label(requests: Array[Dictionary]) -> String:
	# These are requests, never invented stock quantities. Preserve actual states.
	var states: Dictionary = {}
	for request: Dictionary in requests:
		var state := String(request[&"state"])
		states[state] = int(states.get(state, 0)) + 1
	var names: Array = states.keys()
	names.sort()
	var parts: PackedStringArray = []
	for state: String in names:
		parts.append("%s:%d" % [state, states[state]])
	return "物資依頼 " + " / ".join(parts)