import uuid
from collections.abc import AsyncIterator, Iterator

import pytest
import pytest_asyncio
from qdrant_client import AsyncQdrantClient
from testcontainers.community.qdrant import QdrantContainer

from src.config import QdrantSettings
from src.infrastructure.qdrant.client import create_client

# Pinned to match the `qdrant-client` major/minor in pyproject.toml. The
# testcontainers default image trails it far enough that the client emits an
# incompatibility warning, and testing against a version we do not deploy is
# the wrong signal anyway.
_QDRANT_IMAGE = "qdrant/qdrant:v1.19.0"


@pytest.fixture(scope="session")
def qdrant_container() -> Iterator[QdrantContainer]:
    with QdrantContainer(image=_QDRANT_IMAGE) as container:
        yield container


@pytest.fixture(scope="session")
def qdrant_url(qdrant_container: QdrantContainer) -> str:
    """The container's REST URL, pinned to IPv4.

    Same gotcha as postgres_url/minio_settings (see their conftests):
    testcontainers reports the host as `localhost`, which resolves to `::1`
    first, but Docker publishes the mapped port on IPv4 only. The IPv6 SYN is
    dropped rather than refused, so the client hangs until its timeout instead
    of falling back to the second address -- the connection does not fail, it
    hangs.
    """
    host = qdrant_container.get_container_host_ip().replace("localhost", "127.0.0.1")
    return f"http://{host}:{qdrant_container.get_exposed_port(6333)}"


@pytest.fixture
def qdrant_settings(qdrant_url: str) -> QdrantSettings:
    """Settings naming a collection unique to this test (ADR-0016 isolation)."""
    return QdrantSettings(url=qdrant_url, collection=f"chunks_{uuid.uuid4().hex}")


@pytest_asyncio.fixture(loop_scope="session")
async def qdrant_client(qdrant_settings: QdrantSettings) -> AsyncIterator[AsyncQdrantClient]:
    client = create_client(qdrant_settings)
    try:
        yield client
    finally:
        await client.close()