"""Tests for RunManager."""

import re

import pytest

from deerflow.runtime import RunManager, RunStatus

ISO_RE = re.compile(r"^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}")


@pytest.fixture
def manager() -> RunManager:
    return RunManager()


@pytest.mark.anyio
async def test_create_and_get(manager: RunManager):
    """Created run should be retrievable with new fields."""
    record = await manager.create(
        "thread-1",
        "lead_agent",
        metadata={"key": "val"},
        kwargs={"input": {}},
        multitask_strategy="reject",
    )
    assert record.status == RunStatus.pending
    assert record.thread_id == "thread-1"
    assert record.assistant_id == "lead_agent"
    assert record.metadata == {"key": "val"}
    assert record.kwargs == {"input": {}}
    assert record.multitask_strategy == "reject"
    assert ISO_RE.match(record.created_at)
    assert ISO_RE.match(record.updated_at)

    fetched = manager.get(record.run_id)
    assert fetched is record


@pytest.mark.anyio
async def test_status_transitions(manager: RunManager):
    """Status should transition pending -> running -> success."""
    record = await manager.create("thread-1")
    assert record.status == RunStatus.pending

    await manager.set_status(record.run_id, RunStatus.running)
    assert record.status == RunStatus.running
    assert ISO_RE.match(record.updated_at)

    await manager.set_status(record.run_id, RunStatus.success)
    assert record.status == RunStatus.success


@pytest.mark.anyio
async def test_cancel(manager: RunManager):
    """Cancel should set abort_event and transition to interrupted."""
    record = await manager.create("thread-1")
    await manager.set_status(record.run_id, RunStatus.running)

    cancelled = await manager.cancel(record.run_id)
    assert cancelled is True
    assert record.abort_event.is_set()
    assert record.status == RunStatus.interrupted


@pytest.mark.anyio
async def test_cancel_not_inflight(manager: RunManager):
    """Cancelling a completed run should return False."""
    record = await manager.create("thread-1")
    await manager.set_status(record.run_id, RunStatus.success)

    cancelled = await manager.cancel(record.run_id)
    assert cancelled is False


@pytest.mark.anyio
async def test_list_by_thread(manager: RunManager):
    """Same thread should return multiple runs."""
    r1 = await manager.create("thread-1")
    r2 = await manager.create("thread-1")
    await manager.create("thread-2")

    runs = await manager.list_by_thread("thread-1")
    assert len(runs) == 2
    assert runs[0].run_id == r1.run_id
    assert runs[1].run_id == r2.run_id


@pytest.mark.anyio
async def test_list_by_thread_is_stable_when_timestamps_tie(manager: RunManager, monkeypatch: pytest.MonkeyPatch):
    """Ordering should be stable (insertion order) even when timestamps tie."""
    monkeypatch.setattr("deerflow.runtime.runs.manager._now_iso", lambda: "2026-01-01T00:00:00+00:00")

    r1 = await manager.create("thread-1")
    r2 = await manager.create("thread-1")

    runs = await manager.list_by_thread("thread-1")
    assert [run.run_id for run in runs] == [r1.run_id, r2.run_id]


@pytest.mark.anyio
async def test_has_inflight(manager: RunManager):
    """has_inflight should be True when a run is pending or running."""
    record = await manager.create("thread-1")
    assert await manager.has_inflight("thread-1") is True

    await manager.set_status(record.run_id, RunStatus.success)
    assert await manager.has_inflight("thread-1") is False


@pytest.mark.anyio
async def test_cleanup(manager: RunManager):
    """After cleanup, the run should be gone."""
    record = await manager.create("thread-1")
    run_id = record.run_id

    await manager.cleanup(run_id, delay=0)
    assert manager.get(run_id) is None


@pytest.mark.anyio
async def test_set_status_with_error(manager: RunManager):
    """Error message should be stored on the record."""
    record = await manager.create("thread-1")
    await manager.set_status(record.run_id, RunStatus.error, error="Something went wrong")
    assert record.status == RunStatus.error
    assert record.error == "Something went wrong"


@pytest.mark.anyio
async def test_get_nonexistent(manager: RunManager):
    """Getting a nonexistent run should return None."""
    assert manager.get("does-not-exist") is None


@pytest.mark.anyio
async def test_create_defaults(manager: RunManager):
    """Create with no optional args should use defaults."""
    record = await manager.create("thread-1")
    assert record.metadata == {}
    assert record.kwargs == {}
    assert record.multitask_strategy == "reject"
    assert record.assistant_id is None
