# ========= 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.base import Accessor
from mirage.commands.builtin.generic_bind.adapter import (Builder, CommandIO,
                                                          Operation)
from mirage.commands.config import CommandOpts
from mirage.commands.spec import SPECS
from mirage.commands.spec.types import FlagView
from mirage.io.types import ByteSource, IOResult
from mirage.types import PathSpec


async def ln(ops: CommandIO, accessor: Accessor, paths: list[PathSpec],
             texts: list[str],
             opts: CommandOpts) -> tuple[ByteSource | None, IOResult]:
    fl = FlagView(opts.flags, spec=SPECS["ln"])
    n = fl.as_bool("n")
    v = fl.as_bool("v")
    if not ops.is_mounted(accessor) or len(paths) < 2:
        raise ValueError("ln: usage: ln [-s] [-f] source dest")
    exists = ops.require(Operation.EXISTS)
    write = ops.require(Operation.WRITE)
    paths = await ops.resolve_glob(accessor, paths, opts.index)
    source_path = paths[0]
    dest_path = paths[1]
    if n and await exists(accessor, dest_path):
        return None, IOResult()
    data = await ops.read_bytes(accessor, source_path)
    await write(accessor, dest_path, data)
    output = f"'{source_path.virtual}' -> '{dest_path.virtual}'\n".encode(
    ) if v else None
    return output, IOResult(writes={dest_path.mount_path: data})


BUILDER = Builder('ln',
                  ln,
                  write=True,
                  requirements=frozenset({Operation.EXISTS, Operation.WRITE}))
