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"""Implementation of KNX DPT 17 Scene."""
from __future__ import annotations
from xknx.exceptions import ConversionError
from .dpt_5 import DPTValue1ByteUnsigned
from .payload import DPTArray, DPTBinary
class DPTSceneNumber(DPTValue1ByteUnsigned):
"""
Abstraction for KNX 1 Octet Scene Number.
DPT 17.001
"""
dpt_main_number = 17
dpt_sub_number = 1
value_type = "scene_number"
value_min = 1
value_max = 64
@classmethod
def from_knx(cls, payload: DPTArray | DPTBinary) -> int:
"""Parse/deserialize from KNX/IP raw data."""
value = cls.validate_payload(payload)[0] + 1
if not cls._test_boundaries(value):
raise ConversionError(
f"Could not parse {cls.dpt_name()}", value=value, payload=payload
)
return value
@classmethod
def to_knx(cls, value: int | float) -> DPTArray:
"""Serialize to KNX/IP raw data."""
try:
knx_value = int(value) - 1
if not cls._test_boundaries(knx_value + 1):
raise ValueError("Value out of range")
return DPTArray(knx_value)
except ValueError as err:
raise ConversionError(
f"Could not serialize {cls.dpt_name()}", value=value
) from err
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