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

import asyncio

from mirage.resource.ram import RAMResource
from mirage.types import MountMode
from mirage.workspace import Workspace


def _ws():
    mem = RAMResource()
    ws = Workspace(
        {"/data": (mem, MountMode.WRITE)},
        mode=MountMode.WRITE,
    )
    return ws, mem


def _run_raw(ws, cmd, cwd="/", stdin=None):
    ws._cwd = cwd
    io = asyncio.run(ws.execute(cmd, stdin=stdin))
    return io.stdout, io


def _bytes(stdout):
    if isinstance(stdout, bytes):
        return stdout
    return b"".join(asyncio.run(_collect(stdout)))


async def _collect(ait):
    return [chunk async for chunk in ait]


def test_expand_default_tab():
    ws, _ = _ws()
    stdout, _ = _run_raw(ws, "expand", stdin=b"a\tb")
    assert _bytes(stdout) == b"a       b"


def test_expand_t4():
    ws, _ = _ws()
    stdout, _ = _run_raw(ws, "expand -t 4", stdin=b"a\tb")
    assert _bytes(stdout) == b"a   b"


def test_unexpand_t4():
    ws, _ = _ws()
    stdout, _ = _run_raw(ws, "unexpand -a -t 4", stdin=b"    hello")
    assert _bytes(stdout) == b"\thello"