# ========= 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. =========

from datetime import datetime, timezone

from mirage.accessor.ram import RAMAccessor
from mirage.types import PathSpec


def _norm(path: str) -> str:
    return "/" + path.strip("/")


async def truncate(accessor: RAMAccessor, path: PathSpec, length: int) -> None:
    store = accessor.store
    p = _norm(path)
    if p in store.files:
        data = store.files[p]
    else:
        data = b""
    store.files[p] = data[:length].ljust(length, b"\0")
    store.modified[p] = datetime.now(timezone.utc).isoformat()
