# ========= 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 unittest.mock import AsyncMock, patch

import pytest

from mirage.accessor.gdrive import GDriveAccessor
from mirage.cache.index.config import IndexEntry
from mirage.cache.index.ram import RAMIndexCacheStore
from mirage.commands.builtin.gdrive import COMMANDS
from mirage.commands.config import CommandOpts
from mirage.core.gdrive.resolve import DriveNode
from mirage.core.google.client import TokenManager
from mirage.core.google.config import GoogleConfig
from mirage.io.stream import materialize
from mirage.types import PathSpec
from mirage.utils.key_prefix import mount_key


@pytest.fixture
def config():
    return GoogleConfig(
        client_id="test-id",
        client_secret="test-secret",
        refresh_token="test-refresh",
    )


@pytest.fixture
def token_manager(config):
    mgr = TokenManager(config)
    mgr._access_token = "fake-token"
    mgr._expires_at = 9999999999
    return mgr


@pytest.fixture
def accessor(config, token_manager):
    return GDriveAccessor(config=config, token_manager=token_manager)


@pytest.fixture
def index():
    return RAMIndexCacheStore()


def _sed_command():
    for cmd in COMMANDS:
        for rc in cmd._registered_commands:
            if rc.name == "sed":
                return cmd
    raise LookupError("sed not registered for gdrive")


sed = _sed_command()


def _scope(path: str, prefix: str = "") -> PathSpec:
    return PathSpec(resource_path=mount_key(path, prefix),
                    virtual=path,
                    directory=path.rsplit("/", 1)[0] or "/")


@pytest.mark.asyncio
async def test_sed_simple_substitution(accessor, index):
    await index.put(
        "/test/file.txt",
        IndexEntry(
            id="file123",
            name="file.txt",
            resource_type="gdrive/file",
            remote_time="2026-01-01T00:00:00Z",
            vfs_name="file.txt",
            size=100,
        ))
    with patch(
            "mirage.core.google.drive.google_get_bytes",
            new_callable=AsyncMock,
            return_value=b"hello world\nhello again\n",
    ):
        result, io = await sed(accessor, [_scope('/test/file.txt')],
                               ['s/hello/bye/g'], CommandOpts(index=index))
        data = await materialize(result)
        assert data == b"bye world\nbye again\n"
        assert io.exit_code == 0


@pytest.mark.asyncio
async def test_sed_print_program(accessor, index):
    await index.put(
        "/test/file.txt",
        IndexEntry(
            id="file123",
            name="file.txt",
            resource_type="gdrive/file",
            remote_time="2026-01-01T00:00:00Z",
            vfs_name="file.txt",
            size=100,
        ))
    with patch(
            "mirage.core.google.drive.google_get_bytes",
            new_callable=AsyncMock,
            return_value=b"one\ntwo\nthree\n",
    ):
        result, io = await sed(accessor, [_scope('/test/file.txt')], ['2p'],
                               CommandOpts(index=index, flags={'n': True}))
        data = await materialize(result)
        assert data == b"two\n"
        assert io.exit_code == 0


@pytest.mark.asyncio
async def test_sed_stdin(accessor, index):
    result, io = await sed(accessor, [], ['s/a/b/g'],
                           CommandOpts(stdin=b'banana\n', index=index))
    data = await materialize(result)
    assert data == b"bbnbnb\n"
    assert io.exit_code == 0


@pytest.mark.asyncio
async def test_sed_in_place_writes_back(accessor, index):
    await index.put(
        "/test/file.txt",
        IndexEntry(
            id="file123",
            name="file.txt",
            resource_type="gdrive/file",
            remote_time="2026-01-01T00:00:00Z",
            vfs_name="file.txt",
            size=100,
        ))
    node = DriveNode(id="file123", name="file.txt", mime_type="text/plain")
    with patch(
            "mirage.core.google.drive.google_get_bytes",
            new_callable=AsyncMock,
            return_value=b"hello world\n",
    ), patch(
            "mirage.core.gdrive.write.resolve_key",
            new_callable=AsyncMock,
            return_value=node,
    ), patch(
            "mirage.core.gdrive.write.update_file_content",
            new_callable=AsyncMock,
    ) as update:
        _result, io = await sed(accessor, [_scope('/test/file.txt')],
                                ['s/hello/bye/'],
                                CommandOpts(index=index, flags={'i': True}))
        assert io.exit_code == 0
        update.assert_awaited_once()
        assert update.await_args.args[1] == "file123"
        assert update.await_args.args[2] == b"bye world\n"


@pytest.mark.asyncio
async def test_sed_missing_expression(accessor, index):
    # A missing script is reported, not raised: GNU exits 1 with a message,
    # and the TypeScript twin has always returned an IOResult here.
    out, io = await sed(accessor, [], [], CommandOpts(index=index))
    assert out is None
    assert io.exit_code == 1
    assert io.stderr == b"sed: missing script\n"
