# ========= 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 mirage.accessor.box import BoxAccessor
from mirage.commands.builtin.box.pushdown import narrow_scope
from mirage.commands.builtin.generic.grep import grep as generic_grep
from mirage.commands.builtin.generic_bind.adapter import bound_op
from mirage.commands.builtin.grep_helper import pattern_arg
from mirage.commands.config import CommandOpts
from mirage.commands.registry import command
from mirage.commands.spec import SPECS
from mirage.commands.spec.types import FlagView
from mirage.core.box.read import read as _read
from mirage.core.box.read import stream as _stream
from mirage.core.box.readdir import readdir as _readdir
from mirage.core.box.stat import stat as _stat
from mirage.io.types import ByteSource, IOResult
from mirage.types import PathSpec


@command("grep", resource="box", spec=SPECS["grep"])
async def grep(accessor: BoxAccessor, paths: list[PathSpec], texts: list[str],
               opts: CommandOpts) -> tuple[ByteSource | None, IOResult]:
    fl = FlagView(opts.flags, spec=SPECS["grep"])
    pattern = pattern_arg(texts, fl)

    resolved: list[PathSpec] = []
    used_search = False
    if paths:
        # -v and -c need the walk: GNU prints non-matching lines (-v) and
        # zero counts (-c) from files a narrowed superset would never visit.
        resolved, used_search = await narrow_scope(
            accessor,
            opts.index,
            paths,
            pattern,
            fixed_string=fl.as_bool("F"),
            recursive=fl.as_bool("r") or fl.as_bool("R"),
            whole_word=fl.as_bool("w"),
            exact_file_set=fl.as_bool("v") or fl.as_bool("c"),
        )
        if used_search and not resolved:
            return b"", IOResult(exit_code=1)

    return await generic_grep(
        resolved,
        texts,
        opts.flags,
        readdir=bound_op(_readdir, accessor, opts.index),
        stat=bound_op(_stat, accessor, opts.index),
        read_bytes=bound_op(_read, accessor, opts.index),
        read_stream=bound_op(_stream, accessor, opts.index),
        stdin=opts.stdin,
    )
