unraid-mcp/tests/test_storage.py

"""Tests for unraid_storage tool."""

from collections.abc import Generator
from unittest.mock import AsyncMock, patch

import pytest
from conftest import make_tool_fn

from unraid_mcp.core.exceptions import ToolError
from unraid_mcp.core.utils import format_bytes, format_kb, safe_get


# --- Unit tests for helpers ---


class TestFormatBytes:
    def test_none(self) -> None:
        assert format_bytes(None) == "N/A"

    def test_bytes(self) -> None:
        assert format_bytes(512) == "512.00 B"

    def test_kilobytes(self) -> None:
        assert format_bytes(2048) == "2.00 KB"

    def test_megabytes(self) -> None:
        assert format_bytes(1048576) == "1.00 MB"

    def test_gigabytes(self) -> None:
        assert format_bytes(1073741824) == "1.00 GB"

    def test_terabytes(self) -> None:
        assert format_bytes(1099511627776) == "1.00 TB"


# --- Integration tests ---


@pytest.fixture
def _mock_graphql() -> Generator[AsyncMock, None, None]:
    with patch("unraid_mcp.tools.storage.make_graphql_request", new_callable=AsyncMock) as mock:
        yield mock


def _make_tool():
    return make_tool_fn("unraid_mcp.tools.storage", "register_storage_tool", "unraid_storage")


class TestStorageValidation:
    async def test_disk_details_requires_disk_id(self, _mock_graphql: AsyncMock) -> None:
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="disk_id"):
            await tool_fn(action="disk_details")

    async def test_logs_requires_log_path(self, _mock_graphql: AsyncMock) -> None:
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="log_path"):
            await tool_fn(action="logs")

    async def test_logs_rejects_invalid_path(self, _mock_graphql: AsyncMock) -> None:
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="log_path must start with"):
            await tool_fn(action="logs", log_path="/etc/shadow")

    async def test_logs_rejects_path_traversal(self, _mock_graphql: AsyncMock) -> None:
        tool_fn = _make_tool()
        # Traversal that escapes /var/log/ to reach /etc/shadow
        with pytest.raises(ToolError, match="log_path must start with"):
            await tool_fn(action="logs", log_path="/var/log/../../etc/shadow")
        # Traversal that escapes /mnt/ to reach /etc/passwd
        with pytest.raises(ToolError, match="log_path must start with"):
            await tool_fn(action="logs", log_path="/mnt/../etc/passwd")

    async def test_logs_allows_valid_paths(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {"logFile": {"path": "/var/log/syslog", "content": "ok"}}
        tool_fn = _make_tool()
        result = await tool_fn(action="logs", log_path="/var/log/syslog")
        assert result["content"] == "ok"

    async def test_logs_tail_lines_too_large(self, _mock_graphql: AsyncMock) -> None:
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="tail_lines must be between"):
            await tool_fn(action="logs", log_path="/var/log/syslog", tail_lines=10_001)

    async def test_logs_tail_lines_zero_rejected(self, _mock_graphql: AsyncMock) -> None:
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="tail_lines must be between"):
            await tool_fn(action="logs", log_path="/var/log/syslog", tail_lines=0)

    async def test_logs_tail_lines_at_max_accepted(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {"logFile": {"path": "/var/log/syslog", "content": "ok"}}
        tool_fn = _make_tool()
        result = await tool_fn(action="logs", log_path="/var/log/syslog", tail_lines=10_000)
        assert result["content"] == "ok"


class TestFormatKb:
    def test_none_returns_na(self) -> None:
        assert format_kb(None) == "N/A"

    def test_invalid_string_returns_na(self) -> None:
        assert format_kb("not-a-number") == "N/A"

    def test_kilobytes_range(self) -> None:
        assert format_kb(512) == "512 KB"

    def test_megabytes_range(self) -> None:
        assert format_kb(2048) == "2.00 MB"

    def test_gigabytes_range(self) -> None:
        assert format_kb(1_048_576) == "1.00 GB"

    def test_terabytes_range(self) -> None:
        assert format_kb(1_073_741_824) == "1.00 TB"

    def test_boundary_exactly_1024_kb(self) -> None:
        # 1024 KB = 1 MB
        assert format_kb(1024) == "1.00 MB"


class TestSafeGet:
    def test_simple_key_access(self) -> None:
        assert safe_get({"a": 1}, "a") == 1

    def test_nested_key_access(self) -> None:
        assert safe_get({"a": {"b": "val"}}, "a", "b") == "val"

    def test_missing_key_returns_none(self) -> None:
        assert safe_get({"a": 1}, "missing") is None

    def test_none_intermediate_returns_default(self) -> None:
        assert safe_get({"a": None}, "a", "b") is None

    def test_custom_default_returned(self) -> None:
        assert safe_get({}, "x", default="fallback") == "fallback"

    def test_non_dict_intermediate_returns_default(self) -> None:
        assert safe_get({"a": "string"}, "a", "b") is None

    def test_empty_list_default(self) -> None:
        result = safe_get({}, "missing", default=[])
        assert result == []


class TestStorageActions:
    async def test_shares(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {
            "shares": [{"id": "s:1", "name": "media"}, {"id": "s:2", "name": "backups"}]
        }
        tool_fn = _make_tool()
        result = await tool_fn(action="shares")
        assert len(result["shares"]) == 2

    async def test_disks(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {"disks": [{"id": "d:1", "device": "sda"}]}
        tool_fn = _make_tool()
        result = await tool_fn(action="disks")
        assert len(result["disks"]) == 1

    async def test_disk_details(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {
            "disk": {
                "id": "d:1",
                "device": "sda",
                "name": "WD",
                "serialNum": "SN1",
                "size": 1073741824,
                "temperature": 35,
            }
        }
        tool_fn = _make_tool()
        result = await tool_fn(action="disk_details", disk_id="d:1")
        assert result["summary"]["temperature"] == "35\u00b0C"
        assert "1.00 GB" in result["summary"]["size_formatted"]

    async def test_disk_details_temperature_zero(self, _mock_graphql: AsyncMock) -> None:
        """Temperature of 0 should display as '0\u00b0C', not 'N/A'."""
        _mock_graphql.return_value = {
            "disk": {
                "id": "d:1",
                "device": "sda",
                "name": "WD",
                "serialNum": "SN1",
                "size": 1073741824,
                "temperature": 0,
            }
        }
        tool_fn = _make_tool()
        result = await tool_fn(action="disk_details", disk_id="d:1")
        assert result["summary"]["temperature"] == "0\u00b0C"

    async def test_disk_details_temperature_null(self, _mock_graphql: AsyncMock) -> None:
        """Null temperature should display as 'N/A'."""
        _mock_graphql.return_value = {
            "disk": {
                "id": "d:1",
                "device": "sda",
                "name": "WD",
                "serialNum": "SN1",
                "size": 1073741824,
                "temperature": None,
            }
        }
        tool_fn = _make_tool()
        result = await tool_fn(action="disk_details", disk_id="d:1")
        assert result["summary"]["temperature"] == "N/A"

    async def test_logs_null_log_file(self, _mock_graphql: AsyncMock) -> None:
        """logFile being null should return an empty dict."""
        _mock_graphql.return_value = {"logFile": None}
        tool_fn = _make_tool()
        result = await tool_fn(action="logs", log_path="/var/log/syslog")
        assert result == {}

    async def test_disk_details_not_found(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {"disk": None}
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="not found"):
            await tool_fn(action="disk_details", disk_id="d:missing")

    async def test_unassigned(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {"unassignedDevices": []}
        tool_fn = _make_tool()
        result = await tool_fn(action="unassigned")
        assert result["devices"] == []

    async def test_log_files(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {"logFiles": [{"name": "syslog", "path": "/var/log/syslog"}]}
        tool_fn = _make_tool()
        result = await tool_fn(action="log_files")
        assert len(result["log_files"]) == 1

    async def test_logs(self, _mock_graphql: AsyncMock) -> None:
        _mock_graphql.return_value = {
            "logFile": {"path": "/var/log/syslog", "content": "log line", "totalLines": 1}
        }
        tool_fn = _make_tool()
        result = await tool_fn(action="logs", log_path="/var/log/syslog")
        assert result["content"] == "log line"


class TestStorageNetworkErrors:
    """Tests for network-level failures in storage operations."""

    async def test_logs_json_decode_error(self, _mock_graphql: AsyncMock) -> None:
        """Invalid JSON response when reading logs should propagate as ToolError."""
        _mock_graphql.side_effect = ToolError(
            "Invalid JSON response from Unraid API: Expecting value: line 1 column 1"
        )
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="Invalid JSON"):
            await tool_fn(action="logs", log_path="/var/log/syslog")

    async def test_shares_connection_refused(self, _mock_graphql: AsyncMock) -> None:
        """Connection refused when listing shares should propagate as ToolError."""
        _mock_graphql.side_effect = ToolError(
            "Network connection error: [Errno 111] Connection refused"
        )
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="Connection refused"):
            await tool_fn(action="shares")

    async def test_disks_http_500(self, _mock_graphql: AsyncMock) -> None:
        """HTTP 500 when listing disks should propagate as ToolError."""
        _mock_graphql.side_effect = ToolError("HTTP error 500: Internal Server Error")
        tool_fn = _make_tool()
        with pytest.raises(ToolError, match="HTTP error 500"):
            await tool_fn(action="disks")