#!/usr/bin/env python3
"""Conversion round-trips for the Value layer. Plain asserts — run directly."""
import sys

from secsgem_client._proto import equipment_pb2 as pb
from secsgem_client._values import from_value, to_value


def roundtrip(v):
    return from_value(to_value(v))


def main() -> int:
    assert roundtrip(2.5) == 2.5
    assert roundtrip(7) == 7
    assert roundtrip(-3) == -3
    assert roundtrip(True) is True          # bool BEFORE int: must stay boolean
    assert roundtrip(False) is False
    assert to_value(True).WhichOneof("kind") == "boolean"
    assert to_value(1).WhichOneof("kind") == "integer"
    assert roundtrip("wafer-17") == "wafer-17"
    assert roundtrip(b"\x01\x02") == b"\x01\x02"
    assert roundtrip([1, 2.5, "x", [True]]) == [1, 2.5, "x", [True]]
    assert from_value(pb.Value()) is None   # unset oneof
    try:
        to_value(object())
        raise SystemExit("expected TypeError for unconvertible type")
    except TypeError:
        pass
    print("values: all conversion checks passed")
    return 0


if __name__ == "__main__":
    sys.exit(main())