"""Agents stopped mid-task by a misfired nudge reported "the user told me to stop", and others
read hidden harness messages as prompt injection (field reports, 2026-08-16). Mechanism: every
hidden prompt (silent-quit nudges incl. the FINAL one that literally opens "Stop. Do not call any
more tools.", lost-step retries, auth heals, context-break continuations) rides the USER role, so
the model's misattribution is honest from its chair. Seal: one attribution prefix at the ONE send
chokepoint, so no hidden message can ever read as the user's words. REVERSED 2026-08-21 (Eric):
the prefix announced harness traffic on the subscription lane, whose provider filter blocks exactly
that (ENG-358), so hidden prompts now go out verbatim and honesty lives in the nudge texts.
"""
import inspect

import pytest
from unittest.mock import AsyncMock, patch

from backend.apps.agents.core.models import AgentSession


@pytest.mark.asyncio
async def test_hidden_prompt_gets_the_attribution_prefix():
    from backend.apps.agents.agent_manager import agent_manager
    from backend.apps.agents.manager import Messaging
    session = AgentSession(id="hm-1", name="t", model="sonnet", dashboard_id="d")
    agent_manager.sessions["hm-1"] = session
    try:
        with patch.object(Messaging, "ws_manager") as p_ws, \
             patch.object(agent_manager, "run_agent_loop", new=AsyncMock(), create=True):
            p_ws.send_to_session = AsyncMock()
            try:
                await agent_manager.send_message("hm-1", "Stop. Do not call any more tools.", hidden=True)
            except Exception:
                pass  # downstream turn machinery may bail in a unit context; the append happened first
        hidden = [m for m in session.messages if m.role == "user" and m.hidden]
        assert hidden, "hidden message never appended"
        assert hidden[-1].content == "Stop. Do not call any more tools.", "hidden prompts go out verbatim: no attribution prefix on the subscription lane (Eric, 2026-08-21)"
    finally:
        agent_manager.sessions.pop("hm-1", None)


@pytest.mark.asyncio
async def test_visible_user_prompt_is_untouched():
    from backend.apps.agents.agent_manager import agent_manager
    from backend.apps.agents.manager import Messaging
    session = AgentSession(id="hm-2", name="t", model="sonnet", dashboard_id="d")
    agent_manager.sessions["hm-2"] = session
    try:
        with patch.object(Messaging, "ws_manager") as p_ws, \
             patch.object(agent_manager, "run_agent_loop", new=AsyncMock(), create=True):
            p_ws.send_to_session = AsyncMock()
            try:
                await agent_manager.send_message("hm-2", "please stop and summarize", hidden=False)
            except Exception:
                pass
        visible = [m for m in session.messages if m.role == "user" and not m.hidden]
        assert visible and visible[-1].content == "please stop and summarize", "real user words must never be rewritten"
    finally:
        agent_manager.sessions.pop("hm-2", None)


def test_no_prefix_is_ever_added():
    from backend.apps.agents.manager import Messaging
    src = inspect.getsource(Messaging)
    assert "HIDDEN_NOTE_PREFIX" not in src and "[Automated message" not in src, "hidden prompts are sent as written"