# ========= 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 collections.abc import AsyncIterator

from mirage.accessor.ram import RAMAccessor
from mirage.commands.builtin.utils.stream import _read_stdin_async
from mirage.commands.registry import command
from mirage.commands.spec import SPECS
from mirage.core.ram.glob import resolve_glob
from mirage.core.ram.read import read_bytes as _read_bytes
from mirage.io.types import ByteSource, IOResult
from mirage.types import PathSpec


@command("look", resource="ram", spec=SPECS["look"])
async def look(
    accessor: RAMAccessor,
    paths: list[PathSpec],
    *texts: str,
    stdin: AsyncIterator[bytes] | bytes | None = None,
    f: bool = False,
    **_extra: object,
) -> tuple[ByteSource | None, IOResult]:
    if not texts:
        raise ValueError("look: missing prefix")
    prefix = texts[0]
    if paths and accessor.store is not None:
        paths = await resolve_glob(accessor, paths, _extra.get("index"))
        raw = await _read_bytes(accessor, paths[0])
    else:
        raw = await _read_stdin_async(stdin)
        if raw is None:
            raise ValueError("look: missing input")
    text = raw.decode(errors="replace")
    lines = text.splitlines()
    matched: list[str] = []
    for line in lines:
        cmp_line = line.lower() if f else line
        cmp_prefix = prefix.lower() if f else prefix
        if cmp_line.startswith(cmp_prefix):
            matched.append(line)
    if not matched:
        return None, IOResult(exit_code=1)
    output = "\n".join(matched) + "\n"
    return output.encode(), IOResult()
