"""Shared fixtures for EvoScientist tests."""

import asyncio

import pytest


def run_async(coro):
    """Run an async coroutine safely, cancelling pending tasks before closing.

    This prevents 'Event loop is closed' errors from asyncio.Queue cleanup
    when tasks are still waiting on Queue.get() at teardown time.
    """
    loop = asyncio.new_event_loop()
    try:
        return loop.run_until_complete(coro)
    finally:
        # Cancel all pending tasks so Queue getters don't raise on close
        pending = asyncio.all_tasks(loop)
        for task in pending:
            task.cancel()
        if pending:
            loop.run_until_complete(asyncio.gather(*pending, return_exceptions=True))
        loop.run_until_complete(loop.shutdown_asyncgens())
        loop.close()


@pytest.fixture(name="run_async")
def run_async_fixture():
    """Pytest fixture that exposes run_async as a callable for test functions."""
    return run_async


@pytest.fixture
def sample_tool_call():
    """A minimal tool call dict."""
    return {"id": "tc_001", "name": "execute", "args": {"command": "ls -la"}}


@pytest.fixture
def sample_tool_result():
    """A minimal tool result dict."""
    return {
        "id": "tc_001",
        "name": "execute",
        "content": "[OK] file1.py file2.py",
        "success": True,
    }


@pytest.fixture
def sample_events():
    """A sequence of stream event dicts covering common types."""
    return [
        {"type": "thinking", "content": "Let me think..."},
        {"type": "text", "content": "Here is the answer."},
        {
            "type": "tool_call",
            "id": "tc_001",
            "name": "execute",
            "args": {"command": "ls"},
        },
        {
            "type": "tool_result",
            "id": "tc_001",
            "name": "execute",
            "content": "[OK] done",
            "success": True,
        },
        {
            "type": "subagent_start",
            "name": "research-agent",
            "description": "Find papers",
            "instance_id": "task:research",
            "tool_call_id": "tc_task_001",
        },
        {
            "type": "subagent_tool_call",
            "subagent": "research-agent",
            "instance_id": "task:research",
            "name": "tavily_search",
            "args": {"query": "test"},
            "id": "tc_sa_001",
        },
        {
            "type": "subagent_tool_result",
            "subagent": "research-agent",
            "instance_id": "task:research",
            "name": "tavily_search",
            "content": "Results...",
            "success": True,
            "id": "tc_sa_001",
        },
        {
            "type": "subagent_end",
            "name": "research-agent",
            "instance_id": "task:research",
        },
        {"type": "done", "response": "Here is the answer."},
    ]


@pytest.fixture
def tmp_workspace(tmp_path):
    """Provide a temporary workspace directory path."""
    ws = tmp_path / "workspace"
    ws.mkdir()
    return str(ws)


# Capture deepagents tool factories at conftest load time — BEFORE any test
# imports EvoScientist, which can trigger ``_patch_deepagents_model_passthrough``
# during agent construction. Once captured here, the ``restore_model_passthrough_patch``
# fixture has a stable "truly unpatched" baseline to reset to between tests, even
# if upstream code paths apply the patch as a side effect.
try:
    from deepagents.middleware import async_subagents as _ds_async_subagents

    _DEEPAGENTS_ORIGINAL_BUILD_START = _ds_async_subagents._build_start_tool
    _DEEPAGENTS_ORIGINAL_BUILD_UPDATE = _ds_async_subagents._build_update_tool
except Exception:
    _ds_async_subagents = None
    _DEEPAGENTS_ORIGINAL_BUILD_START = None
    _DEEPAGENTS_ORIGINAL_BUILD_UPDATE = None


@pytest.fixture
def restore_model_passthrough_patch():
    """Reset deepagents internals + ``_model_passthrough_patched`` to unpatched.

    The model-passthrough patch wraps ``deepagents.middleware.async_subagents``
    module-level functions in place. The originals are captured at conftest
    load time (above) so this fixture can always start each test from a
    known-unpatched state regardless of what other tests / agent fixtures
    did to the module before.
    """
    from EvoScientist.llm import patches as patches_mod

    if _ds_async_subagents is None:
        # deepagents not importable — fixture is a no-op (the patch fn itself
        # returns early in that case).
        yield
        return

    def _reset() -> None:
        _ds_async_subagents._build_start_tool = _DEEPAGENTS_ORIGINAL_BUILD_START
        _ds_async_subagents._build_update_tool = _DEEPAGENTS_ORIGINAL_BUILD_UPDATE
        patches_mod._model_passthrough_patched = False

    _reset()
    try:
        yield
    finally:
        _reset()