class_name RoomValidator


static func validate(
	room: RoomDefinition,
	database: ProjectDatabase
) -> ValidationResult:

	var result := ValidationResult.new()

	if room == null:
		result.add_error(
			"RoomDefinition is null."
		)
		return result

	_validate_cabinet_placements(
		room,
		database,
		result
	)

	_validate_devices(
		room,
		result
	)

	_validate_bindings(
		room,
		database,
		result
	)

	return result

static func _validate_cabinet_placements(
	room: RoomDefinition,
	database: ProjectDatabase,
	result: ValidationResult
) -> void:

	var seen_ids: Dictionary = {}

	for placement in room.cabinet_placements:

		if placement == null:
			result.add_warning(
				"Room contains a null cabinet placement."
			)
			continue

		var cabinet_id := placement.cabinet_id

		if cabinet_id == &"":
			result.add_error(
				"Room contains a cabinet placement with no cabinet_id."
			)
			continue

		if seen_ids.has(cabinet_id):
			result.add_error(
				"Cabinet '%s' is placed in the room more than once."
				% cabinet_id
			)
		else:
			seen_ids[cabinet_id] = true

		if database != null:
			if database.get_cabinet(
				cabinet_id
			) == null:

				result.add_error(
					"Room references unknown cabinet '%s'."
					% cabinet_id
				)

static func _validate_devices(
	room: RoomDefinition,
	result: ValidationResult
) -> void:

	var seen_ids: Dictionary = {}

	for device in room.devices:

		if device == null:
			result.add_warning(
				"Room contains a null device."
			)
			continue

		if device.device_id == &"":
			result.add_error(
				"Room contains a device with no device_id."
			)
			continue

		if seen_ids.has(
			device.device_id
		):
			result.add_error(
				"Room device '%s' appears more than once."
				% device.device_id
			)
		else:
			seen_ids[
				device.device_id
			] = true

static func _validate_bindings(
	room: RoomDefinition,
	database: ProjectDatabase,
	result: ValidationResult
) -> void:

	var seen_bindings: Dictionary = {}

	for binding in room.bindings:

		if binding == null:
			result.add_warning(
				"Room contains a null device binding."
			)
			continue

		var cabinet_id := binding.cabinet_id
		var action_id := binding.hardware_action_id
		var device_id := binding.device_id

		if cabinet_id == &"":
			result.add_error(
				"A room binding has no cabinet_id."
			)
			continue

		if action_id == &"":
			result.add_error(
				"A room binding for cabinet '%s' has no hardware action."
				% cabinet_id
			)
			continue

		if device_id == &"":
			result.add_error(
				"A room binding for cabinet '%s' has no device_id."
				% cabinet_id
			)
			continue

		if room.get_cabinet_placement(
			cabinet_id
		) == null:

			result.add_error(
				(
					"Binding references cabinet '%s', "
					+ "but that cabinet is not placed in the room."
				)
				% cabinet_id
			)

		if room.get_device(
			device_id
		) == null:

			result.add_error(
				"Binding references unknown room device '%s'."
				% device_id
			)

		var cabinet: CabinetProfile = null

		if database != null:
			cabinet = database.get_cabinet(
				cabinet_id
			)

		if cabinet == null:
			result.add_error(
				"Binding references unknown cabinet '%s'."
				% cabinet_id
			)
		else:
			if cabinet.hardware_config == null:
				result.add_error(
					"Cabinet '%s' has no HardwareConfig."
					% cabinet_id
				)
			elif not cabinet.hardware_config.has_action(
				action_id
			):
				result.add_error(
					(
						"Room binding references unknown hardware action '%s' "
						+ "on cabinet '%s'."
					)
					% [
						action_id,
						cabinet_id
					]
				)

		var binding_key := (
			"%s::%s::%s"
			% [
				cabinet_id,
				action_id,
				device_id
			]
		)

		if seen_bindings.has(
			binding_key
		):
			result.add_warning(
				"Duplicate room binding '%s'."
				% binding_key
			)
		else:
			seen_bindings[
				binding_key
			] = true