import pytest
from unittest.mock import MagicMock, patch
from botocore.exceptions import ClientError

from app.clients.storage.rustfs_client import RustFSClient
from app.core.exceptions import StorageError


@pytest.fixture
def client():
    with patch("app.clients.storage.rustfs_client.boto3") as mock_boto3:
        c = RustFSClient(
            endpoint="http://rustfs:9000",
            access_key="key",
            secret_key="secret",
        )
        c._s3 = MagicMock()
        return c


@pytest.mark.asyncio
async def test_download_bytes_returns_bytes(client):
    client._s3.get_object.return_value = {"Body": MagicMock(read=lambda: b"hello")}
    result = await client.download_bytes("source-data", "text/test.txt")
    assert result == b"hello"
    client._s3.get_object.assert_called_once_with(Bucket="source-data", Key="text/test.txt")


@pytest.mark.asyncio
async def test_download_bytes_raises_storage_error(client):
    client._s3.get_object.side_effect = ClientError(
        {"Error": {"Code": "NoSuchKey", "Message": "Not Found"}}, "GetObject"
    )
    with pytest.raises(StorageError, match="存储下载失败"):
        await client.download_bytes("source-data", "missing.txt")


@pytest.mark.asyncio
async def test_get_object_size_returns_content_length(client):
    client._s3.head_object.return_value = {"ContentLength": 1024}
    size = await client.get_object_size("source-data", "video/test.mp4")
    assert size == 1024
    client._s3.head_object.assert_called_once_with(Bucket="source-data", Key="video/test.mp4")


@pytest.mark.asyncio
async def test_get_object_size_raises_storage_error(client):
    client._s3.head_object.side_effect = ClientError(
        {"Error": {"Code": "NoSuchKey", "Message": "Not Found"}}, "HeadObject"
    )
    with pytest.raises(StorageError, match="获取文件大小失败"):
        await client.get_object_size("source-data", "video/missing.mp4")


@pytest.mark.asyncio
async def test_upload_bytes_calls_put_object(client):
    client._s3.put_object.return_value = {}
    await client.upload_bytes("source-data", "frames/1/0.jpg", b"jpeg-data", "image/jpeg")
    client._s3.put_object.assert_called_once()
    call_kwargs = client._s3.put_object.call_args
    assert call_kwargs.kwargs["Bucket"] == "source-data"
    assert call_kwargs.kwargs["Key"] == "frames/1/0.jpg"