from contextlib import suppress

import structlog
from config import DB_NAME, MONGO_URI, RETENTION_DAYS
from pymongo import ASCENDING, DESCENDING, TEXT, MongoClient

client = MongoClient(MONGO_URI or "mongodb://localhost:27017")
db = client[DB_NAME]
events_collection = db["events"]
logger = structlog.get_logger("aoc.database")


def setup_indexes(max_retries: int = 5, delay: float = 2.0):
    """Ensure MongoDB indexes exist. Retries on connection errors."""
    from time import sleep

    for attempt in range(1, max_retries + 1):
        try:
            events_collection.create_index("dedupe_key", unique=True, sparse=True)
            events_collection.create_index([("timestamp", DESCENDING)])
            events_collection.create_index([("service", ASCENDING), ("timestamp", DESCENDING)])
            events_collection.create_index("id")
            events_collection.create_index(
                [("actor_display", TEXT), ("raw_text", TEXT), ("operation", TEXT)],
                name="text_search_index",
            )
            if RETENTION_DAYS > 0:
                events_collection.create_index(
                    [("timestamp", ASCENDING)],
                    expireAfterSeconds=RETENTION_DAYS * 24 * 60 * 60,
                    name="ttl_timestamp",
                )
            else:
                with suppress(Exception):
                    events_collection.drop_index("ttl_timestamp")
            logger.info("MongoDB indexes ensured")
            return
        except Exception as exc:
            if attempt == max_retries:
                logger.error("Failed to ensure MongoDB indexes", error=str(exc))
                raise
            logger.warning("MongoDB not ready, retrying...", attempt=attempt, error=str(exc))
            sleep(delay)