"""Tool registry tests."""

from __future__ import annotations

from mcp_server import tools

MIN_TOOLS = 5


def test_tool_catalog_has_minimum_tools() -> None:
    """Catalog includes baseline tools."""
    catalog = tools.tool_catalog()
    assert len(catalog) >= MIN_TOOLS
    names = {tool.name for tool in catalog}
    assert "show-constitution" in names
    assert "list-playbooks" in names
    assert "show-reference" in names


def test_invoke_tool_handles_unknown() -> None:
    """Unknown tool returns unsupported guidance."""
    result = tools.invoke_tool("missing-tool", {})
    assert result["status"] == "unsupported"
    assert "listTools" in result["actions"][0]


def test_list_tools_payload_shape() -> None:
    """Payload includes tools key."""
    payload = tools.list_tools_payload()
    assert "tools" in payload
    assert all("name" in entry for entry in payload["tools"])