"""`QdrantPointStorage` against a real Qdrant (ADR-0001, ADR-0002).

Reads here go through the raw client rather than the port: `PointStorage` is
deliberately write-only, because point reads are plan 002's `/v1/points`
surface. The reads below are the test's own verification, not a preview of an
API this slice ships.
"""

import uuid
from datetime import UTC, datetime

import pytest
from qdrant_client import AsyncQdrantClient, models

from src.application.ingestion.chunking import chunk_id_for
from src.application.ingestion.models import SparseVector
from src.application.points.models import ChunkPoint
from src.config import QdrantSettings
from src.infrastructure.qdrant.collection import (
    DENSE_NOMIC_DIMENSIONS,
    DENSE_OPENAI_DIMENSIONS,
    ensure_chunks_collection,
)
from src.infrastructure.qdrant.points import QdrantPointStorage

pytestmark = [
    pytest.mark.integration,
    pytest.mark.qdrant,
    pytest.mark.asyncio(loop_scope="session"),
]


def _point(tenant_id: uuid.UUID, file_id: uuid.UUID, chunk_index: int) -> ChunkPoint:
    return ChunkPoint(
        point_id=chunk_id_for(file_id, chunk_index),
        dense={
            "dense_nomic": [0.1] * DENSE_NOMIC_DIMENSIONS,
            "dense_openai": [0.2] * DENSE_OPENAI_DIMENSIONS,
        },
        sparse=SparseVector(indices=[1, 2], values=[0.5, 0.25]),
        payload={
            "tenant_id": str(tenant_id),
            "domain": "fire",
            "file_id": str(file_id),
            "chunk_id": str(chunk_id_for(file_id, chunk_index)),
            "chunk_index": chunk_index,
            "order_id": float(chunk_index + 1),
            "content": f"chunk {chunk_index}",
            "is_active": True,
        },
    )


async def _storage(
    qdrant_client: AsyncQdrantClient, qdrant_settings: QdrantSettings
) -> QdrantPointStorage:
    await ensure_chunks_collection(qdrant_client, collection=qdrant_settings.collection)
    return QdrantPointStorage(qdrant_client, collection=qdrant_settings.collection)


async def _count_for_tenant(
    client: AsyncQdrantClient, collection: str, tenant_id: uuid.UUID
) -> int:
    result = await client.count(
        collection_name=collection,
        count_filter=models.Filter(
            must=[
                models.FieldCondition(
                    key="tenant_id", match=models.MatchValue(value=str(tenant_id))
                )
            ]
        ),
        exact=True,
    )
    return result.count


async def test_upsert_points_stores_points_readable_under_the_owning_tenant_filter(
    qdrant_client: AsyncQdrantClient, qdrant_settings: QdrantSettings
) -> None:
    storage = await _storage(qdrant_client, qdrant_settings)
    tenant_id, file_id = uuid.uuid4(), uuid.uuid4()

    await storage.upsert_points([_point(tenant_id, file_id, i) for i in range(3)])

    assert await _count_for_tenant(qdrant_client, qdrant_settings.collection, tenant_id) == 3


async def test_upsert_points_are_invisible_to_another_tenants_filter(
    qdrant_client: AsyncQdrantClient, qdrant_settings: QdrantSettings
) -> None:
    """The Qdrant-level form of "cross-tenant access finds nothing" (ADR-0002)."""
    storage = await _storage(qdrant_client, qdrant_settings)
    owner, other, file_id = uuid.uuid4(), uuid.uuid4(), uuid.uuid4()

    await storage.upsert_points([_point(owner, file_id, i) for i in range(3)])

    assert await _count_for_tenant(qdrant_client, qdrant_settings.collection, other) == 0


async def test_upsert_points_is_idempotent_for_deterministic_ids(
    qdrant_client: AsyncQdrantClient, qdrant_settings: QdrantSettings
) -> None:
    storage = await _storage(qdrant_client, qdrant_settings)
    tenant_id, file_id = uuid.uuid4(), uuid.uuid4()
    points = [_point(tenant_id, file_id, i) for i in range(4)]

    await storage.upsert_points(points)
    await storage.upsert_points(points)

    assert await _count_for_tenant(qdrant_client, qdrant_settings.collection, tenant_id) == 4


async def test_deactivate_points_from_index_soft_deletes_only_the_tail(
    qdrant_client: AsyncQdrantClient, qdrant_settings: QdrantSettings
) -> None:
    storage = await _storage(qdrant_client, qdrant_settings)
    tenant_id, file_id = uuid.uuid4(), uuid.uuid4()
    await storage.upsert_points([_point(tenant_id, file_id, i) for i in range(5)])

    deactivated = await storage.deactivate_points_from_index(
        tenant_id=tenant_id,
        file_id=file_id,
        from_chunk_index=2,
        deleted_at=datetime.now(UTC),
        updated_by="api_key:test",
    )

    assert deactivated == 3
    records, _ = await qdrant_client.scroll(
        collection_name=qdrant_settings.collection,
        scroll_filter=models.Filter(
            must=[models.FieldCondition(key="file_id", match=models.MatchValue(value=str(file_id)))]
        ),
        limit=10,
        with_payload=True,
    )
    by_index = {
        record.payload["chunk_index"]: record.payload["is_active"]
        for record in records
        if record.payload is not None
    }
    assert by_index == {0: True, 1: True, 2: False, 3: False, 4: False}
    # Soft delete, not removal -- the points stay for audit (ADR-0002).
    assert await _count_for_tenant(qdrant_client, qdrant_settings.collection, tenant_id) == 5


async def test_deactivate_points_from_index_does_not_touch_another_tenants_points(
    qdrant_client: AsyncQdrantClient, qdrant_settings: QdrantSettings
) -> None:
    """A file_id alone is never authority to mutate (ADR-0002)."""
    storage = await _storage(qdrant_client, qdrant_settings)
    owner, other, file_id = uuid.uuid4(), uuid.uuid4(), uuid.uuid4()
    await storage.upsert_points([_point(owner, file_id, i) for i in range(3)])

    deactivated = await storage.deactivate_points_from_index(
        tenant_id=other,
        file_id=file_id,
        from_chunk_index=0,
        deleted_at=datetime.now(UTC),
        updated_by="api_key:intruder",
    )

    assert deactivated == 0


async def test_deactivate_points_from_index_returns_zero_when_nothing_is_stale(
    qdrant_client: AsyncQdrantClient, qdrant_settings: QdrantSettings
) -> None:
    storage = await _storage(qdrant_client, qdrant_settings)
    tenant_id, file_id = uuid.uuid4(), uuid.uuid4()
    await storage.upsert_points([_point(tenant_id, file_id, i) for i in range(3)])

    deactivated = await storage.deactivate_points_from_index(
        tenant_id=tenant_id,
        file_id=file_id,
        from_chunk_index=3,
        deleted_at=datetime.now(UTC),
        updated_by="api_key:test",
    )

    assert deactivated == 0