"""Meilisearch backend (SPEC §8, M2). Runs against the live Meili in the dev/CI
stack; skips if it is unreachable so the rest of the suite still runs locally."""

from __future__ import annotations

import asyncio
import time
import uuid

import pytest

from app.search.base import SearchDoc
from app.search.meili import MeiliSearchBackend
from app.search.queryparser import to_search_query


def _doc(user_id: uuid.UUID) -> SearchDoc:
    return SearchDoc(
        message_id=uuid.uuid4(),
        thread_id=uuid.uuid4(),
        user_id=user_id,
        account_id=uuid.uuid4(),
        mailbox_special_use="inbox",
        from_=[{"name": "Bob Vendor", "email": "bob@vendor.com"}],
        to=[{"name": "Me", "email": "me@x.com"}],
        cc=[],
        subject="Your invoice for March",
        body_text="Please find attached the invoice, amount due soon.",
        attachment_names=["invoice.pdf"],
        has_attachments=True,
        is_unread=True,
        is_starred=False,
        date=int(time.time()),
        size_bytes=2048,
    )


async def _poll(backend: MeiliSearchBackend, q: str, user_id: uuid.UUID) -> int:
    """Indexing is async in Meili; retry briefly until the doc is searchable."""
    for _ in range(60):
        hits, _c = await backend.query(to_search_query(q, user_id), limit=10, cursor=None)
        if hits:
            return len(hits)
        await asyncio.sleep(0.05)
    return 0


async def test_meili_typo_tolerance_and_filters() -> None:
    backend = MeiliSearchBackend()
    user_id = uuid.uuid4()
    try:
        await backend.index(_doc(user_id))

        # Acceptance (§12 M2): a typo still finds the message.
        hits, _c = await backend.query(to_search_query("invocie", user_id), limit=10, cursor=None)
        if not hits:  # wait for the async index task
            assert await _poll(backend, "invocie", user_id) == 1
            hits, _c = await backend.query(
                to_search_query("invocie", user_id), limit=10, cursor=None
            )
        assert len(hits) == 1
        assert "<mark>" in hits[0].highlights.get("subject", "")

        async def n(query: str) -> int:
            res, _c = await backend.query(to_search_query(query, user_id), limit=10, cursor=None)
            return len(res)

        assert await n("is:unread invoice") == 1
        assert await n("is:read invoice") == 0  # the doc is unread
        assert await n("from:vendor") == 1  # field operator folded into the query
        assert await n("larger:1k invoice") == 1
        assert await n("larger:5k invoice") == 0
        assert await n("in:sent invoice") == 0  # doc is in the inbox
    except (ConnectionError, OSError) as exc:  # Meili not running locally
        pytest.skip(f"Meilisearch unavailable: {exc}")
    finally:
        await backend.delete_user(user_id)