# ========= 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.core.gdrive.stat import stat
from mirage.core.google.client import TokenManager
from mirage.core.google.config import GoogleConfig
from mirage.types import FileType, PathSpec


@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():
    store = RAMIndexCacheStore()
    return store


async def _populate_index(index):
    await index.put(
        "/report.pdf",
        IndexEntry(
            id="f1",
            name="report",
            resource_type="gdrive/file",
            remote_time="2026-04-01T00:00:00.000Z",
            vfs_name="report.pdf",
            size=1024,
        ))
    await index.put(
        "/docs",
        IndexEntry(
            id="folder1",
            name="docs",
            resource_type="gdrive/folder",
            remote_time="2026-04-01T00:00:00.000Z",
            vfs_name="docs",
        ))
    return index


@pytest.mark.asyncio
async def test_stat_root(accessor, index):
    idx = await _populate_index(index)
    result = await stat(accessor,
                        PathSpec(resource_path="", virtual="/", directory="/"),
                        idx)
    assert result.type == FileType.DIRECTORY
    assert result.name == "/"


@pytest.mark.asyncio
async def test_stat_file(accessor, index):
    idx = await _populate_index(index)
    result = await stat(
        accessor,
        PathSpec(resource_path="report.pdf",
                 virtual="/report.pdf",
                 directory="/report.pdf"), idx)
    assert result.name == "report.pdf"
    assert result.size == 1024
    assert result.extra["file_id"] == "f1"
    assert result.extra["resource_type"] == "gdrive/file"


@pytest.mark.asyncio
async def test_stat_folder(accessor, index):
    idx = await _populate_index(index)
    result = await stat(
        accessor,
        PathSpec(resource_path="docs", virtual="/docs", directory="/docs"),
        idx)
    assert result.type == FileType.DIRECTORY
    assert result.extra["file_id"] == "folder1"


@pytest.mark.asyncio
async def test_stat_shared_drive_is_directory(accessor, index):
    await index.put(
        "/Team Drive",
        IndexEntry(
            id="drive1",
            name="Team Drive",
            resource_type="gdrive/shared_drive",
            vfs_name="Team Drive",
            extra={"drive_id": "drive1"},
        ))
    result = await stat(
        accessor,
        PathSpec(resource_path="Team Drive",
                 virtual="/Team Drive",
                 directory="/Team Drive"),
        index,
    )
    assert result.type == FileType.DIRECTORY
    assert result.extra["file_id"] == "drive1"


@pytest.mark.asyncio
async def test_stat_not_found(accessor, index):
    idx = await _populate_index(index)
    with patch(
            "mirage.core.gdrive.readdir.list_files",
            new_callable=AsyncMock,
            return_value=[],
    ), patch(
            "mirage.core.gdrive.resolve.list_files",
            new_callable=AsyncMock,
            return_value=[],
    ), patch(
            "mirage.core.gdrive.resolve.list_shared_drives",
            new_callable=AsyncMock,
            return_value=[],
    ):
        with pytest.raises(FileNotFoundError):
            await stat(
                accessor,
                PathSpec(resource_path="nonexistent.txt",
                         virtual="/nonexistent.txt",
                         directory="/nonexistent.txt"), idx)


@pytest.mark.asyncio
async def test_stat_cache_miss_falls_back_via_readdir(accessor, index):
    files = [{
        "id": "f99",
        "name": "fresh.pdf",
        "mimeType": "application/pdf",
        "modifiedTime": "2026-04-15T00:00:00.000Z",
        "size": "2048",
    }]
    with patch(
            "mirage.core.gdrive.readdir.list_files",
            new_callable=AsyncMock,
            return_value=files,
    ) as mock_list:
        result = await stat(
            accessor,
            PathSpec(resource_path="fresh.pdf",
                     virtual="/fresh.pdf",
                     directory="/fresh.pdf"), index)
    assert result.name == "fresh.pdf"
    assert result.extra["file_id"] == "f99"
    # binary files download raw, so Drive's size is the rendered length
    assert result.size == 2048
    assert mock_list.call_count == 1


@pytest.mark.asyncio
async def test_stat_propagates_parent_refresh_failure(accessor, index):
    failure = RuntimeError("drive unavailable")
    with patch("mirage.core.gdrive.stat._readdir",
               new_callable=AsyncMock,
               side_effect=failure):
        with pytest.raises(RuntimeError, match="drive unavailable"):
            await stat(accessor, PathSpec.from_str_path("/missing.txt"), index)
