# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========


class PolicyError(ValueError):
    """The runtime argument, policy, or a script could not decide the line.

    Raised for caller-fixable routing mistakes (unknown runtime name, a
    script that does not parse, a missing monty extra) so execute()
    propagates them loud instead of folding them into the line's
    IOResult like a command failure.
    """


class PolicyDeny(Exception):
    """The policy refused the line before anything ran.

    A legitimate policy outcome, not a mistake: execute() folds it into
    the line's IOResult (exit 126, the reason on stderr) instead of
    propagating like PolicyError.

    Args:
        reason (str): why the line was denied, shown on stderr.
    """

    def __init__(self, reason: str) -> None:
        super().__init__(reason)
        self.reason = reason
