"""Tests for the tool registry and argument validation."""

from stt_daemon.assistant.tools import Tool, ToolRegistry, default_registry


def test_default_registry_exposes_get_datetime():
    registry = default_registry()
    tool = registry.get("get_datetime")
    assert tool is not None
    assert tool.side_effect == "read_only"

    spec = registry.specs()[0]
    assert spec["type"] == "function"
    assert spec["function"]["name"] == "get_datetime"


def test_get_datetime_returns_iso_timestamp():
    tool = default_registry().get("get_datetime")
    assert tool is not None
    assert "T" in tool.run({})


def test_validate_rejects_unknown_tool():
    args, error = default_registry().validate("nope", "{}")
    assert args is None
    assert error is not None and "unknown tool" in error


def test_validate_rejects_malformed_json():
    args, error = default_registry().validate("get_datetime", "{not json")
    assert args is None
    assert error is not None and "invalid JSON" in error


def test_validate_rejects_non_object_arguments():
    args, error = default_registry().validate("get_datetime", "[1, 2]")
    assert args is None
    assert error is not None and "object" in error


def test_validate_accepts_empty_object():
    args, error = default_registry().validate("get_datetime", "{}")
    assert args == {}
    assert error is None


def test_schema_requires_checks_unknown_and_types():
    registry = ToolRegistry()
    registry.register(
        Tool(
            name="set_volume",
            description="Set the volume",
            parameters={
                "type": "object",
                "properties": {"level": {"type": "integer"}},
                "required": ["level"],
            },
            run=lambda args: "ok",
        )
    )

    def reject(arguments, fragment):
        args, error = registry.validate("set_volume", arguments)
        assert args is None
        assert error is not None and fragment in error

    reject("{}", "missing required")
    reject('{"level": 1, "x": 2}', "unexpected argument")
    reject('{"level": "loud"}', "must be integer")
    reject('{"level": true}', "must be integer")
    assert registry.validate("set_volume", '{"level": 5}') == ({"level": 5}, None)