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# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
#     http://www.apache.org/licenses/LICENSE-2.0
#
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# distributed under the License is distributed on an "AS IS" BASIS,
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# See the License for the specific language governing permissions and
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# ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========

from mirage.accessor.base import Accessor
from mirage.cache.index import IndexCacheStore
from mirage.commands.builtin.generic_bind.adapter import CommandIO
from mirage.types import PathSpec


async def resolve_or_empty(ops: CommandIO, accessor: Accessor,
                           paths: list[PathSpec],
                           index: IndexCacheStore) -> list[PathSpec]:
    """Expand glob operands, or [] when there is nothing to resolve.

    The read-family wiring entry: an unmounted backend or an empty
    operand list resolves to no paths, which the generics read as stdin
    mode. Operand semantics (report-and-continue, directory refusal)
    live in the generics via ``split_readable``; this is wiring only.

    Args:
        ops (CommandIO): Backend I/O bundle providing ``resolve_glob``.
        accessor (Accessor): Backend accessor.
        paths (list[PathSpec]): Raw path operands (may hold globs).
        index (IndexCacheStore): Index cache store.
    """
    if paths and ops.is_mounted(accessor):
        return await ops.resolve_glob(accessor, paths, index)
    return []
