"""Fire-and-forget webhook tasks must be referenced until they finish.

asyncio keeps only a weak reference to a bare create_task() result, so a
delivery task could be garbage-collected before it ran and the webhook silently
dropped. WebhookManager now holds a strong reference for the task's lifetime and
releases it on completion.
"""
import asyncio
import sys

# webhook_manager does `from src.database import SessionLocal, Webhook` at import
# time. The shared test harness stubs src.database without Webhook, so ensure the
# attribute exists before importing the manager. These tests never touch the DB
# (the manager is built via __new__), so a placeholder class is sufficient.
_db = sys.modules.get("src.database")
if _db is not None and not hasattr(_db, "Webhook"):
    _db.Webhook = type("Webhook", (), {})

from src.webhook_manager import WebhookManager  # noqa: E402


def test_spawn_tracked_holds_then_releases_reference():
    async def run():
        wm = WebhookManager.__new__(WebhookManager)
        wm._bg_tasks = set()

        gate = asyncio.Event()

        async def work():
            await gate.wait()

        task = wm._spawn_tracked(work())
        # Referenced while in flight (this is what stops GC from collecting it).
        assert task in wm._bg_tasks
        gate.set()
        await task
        # Reference released once done, so the set does not grow unbounded.
        assert task not in wm._bg_tasks

    asyncio.run(run())


def test_spawn_tracked_runs_the_coroutine():
    async def run():
        wm = WebhookManager.__new__(WebhookManager)
        wm._bg_tasks = set()
        ran = []

        async def work():
            ran.append(True)

        await wm._spawn_tracked(work())
        assert ran == [True]

    asyncio.run(run())