import pytest

from nanobot.agent.tools.message import MessageTool


@pytest.mark.asyncio
async def test_message_tool_returns_error_when_no_target_context() -> None:
    tool = MessageTool()
    result = await tool.execute(content="test")
    assert result == "Error: No target channel/chat specified"


@pytest.mark.asyncio
@pytest.mark.parametrize(
    "bad",
    [
        "not a list",
        [["ok"], "row-not-a-list"],
        [["ok", 42]],
        [[None]],
    ],
)
async def test_message_tool_rejects_malformed_buttons(bad) -> None:
    """``buttons`` must be ``list[list[str]]``; the tool validates the shape
    up front so a malformed LLM payload errors visibly instead of slipping
    into the channel layer where Telegram would silently reject the frame."""
    tool = MessageTool()
    result = await tool.execute(
        content="hi", channel="telegram", chat_id="1", buttons=bad,
    )
    assert result == "Error: buttons must be a list of list of strings"