"""Tests for MCP subscription resources."""

import json
from unittest.mock import AsyncMock, patch

import pytest
from fastmcp import FastMCP

from unraid_mcp.subscriptions.queries import SNAPSHOT_ACTIONS
from unraid_mcp.subscriptions.resources import register_subscription_resources


def _make_resources():
    """Register resources on a test FastMCP instance and return it."""
    test_mcp = FastMCP("test")
    register_subscription_resources(test_mcp)
    return test_mcp


@pytest.fixture
def _mock_ensure_started():
    with patch(
        "unraid_mcp.subscriptions.resources.ensure_subscriptions_started",
        new_callable=AsyncMock,
    ) as mock:
        yield mock


class TestLiveResourcesUseManagerCache:
    """All live resources must read from the persistent SubscriptionManager cache."""

    @pytest.mark.parametrize("action", list(SNAPSHOT_ACTIONS.keys()))
    async def test_resource_returns_cached_data(
        self, action: str, _mock_ensure_started: AsyncMock
    ) -> None:
        cached = {"systemMetricsCpu": {"percentTotal": 12.5}}
        with patch("unraid_mcp.subscriptions.resources.subscription_manager") as mock_mgr:
            mock_mgr.get_resource_data = AsyncMock(return_value=cached)
            mcp = _make_resources()
            resource = mcp.providers[0]._components[f"resource:unraid://live/{action}@"]
            result = await resource.fn()
        assert json.loads(result) == cached

    @pytest.mark.parametrize("action", list(SNAPSHOT_ACTIONS.keys()))
    async def test_resource_returns_status_when_no_cache(
        self, action: str, _mock_ensure_started: AsyncMock
    ) -> None:
        with patch("unraid_mcp.subscriptions.resources.subscription_manager") as mock_mgr:
            mock_mgr.get_resource_data = AsyncMock(return_value=None)
            mcp = _make_resources()
            resource = mcp.providers[0]._components[f"resource:unraid://live/{action}@"]
            result = await resource.fn()
        parsed = json.loads(result)
        assert "status" in parsed

    def test_subscribe_once_not_imported(self) -> None:
        """subscribe_once must not be imported — resources use manager cache exclusively."""
        import unraid_mcp.subscriptions.resources as res_module

        assert not hasattr(res_module, "subscribe_once")


class TestSnapshotSubscriptionsRegistered:
    """All SNAPSHOT_ACTIONS must be registered in the SubscriptionManager with auto_start=True."""

    def test_all_snapshot_actions_in_configs(self) -> None:
        from unraid_mcp.subscriptions.manager import subscription_manager

        for action in SNAPSHOT_ACTIONS:
            assert action in subscription_manager.subscription_configs, (
                f"'{action}' not registered in subscription_configs"
            )

    def test_all_snapshot_actions_autostart(self) -> None:
        from unraid_mcp.subscriptions.manager import subscription_manager

        for action in SNAPSHOT_ACTIONS:
            config = subscription_manager.subscription_configs[action]
            assert config.get("auto_start") is True, (
                f"'{action}' missing auto_start=True in subscription_configs"
            )


class TestLogsStreamResource:
    async def test_logs_stream_no_data(self, _mock_ensure_started: AsyncMock) -> None:
        with patch("unraid_mcp.subscriptions.resources.subscription_manager") as mock_mgr:
            mock_mgr.get_resource_data = AsyncMock(return_value=None)
            mcp = _make_resources()
            local_provider = mcp.providers[0]
            resource = local_provider._components["resource:unraid://logs/stream@"]
            result = await resource.fn()
            parsed = json.loads(result)
            assert "status" in parsed