"""Background scheduler for retrying failed PSA documentation pushes.

Runs every 5 minutes via APScheduler, picks up PsaPostLog entries
with status='pending_retry' and next_retry_at <= now.
"""
import logging
from datetime import datetime, timezone

from sqlalchemy import select
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.admin_database import _admin_session_factory as async_session_maker
from app.models.psa_post_log import PsaPostLog
from app.services.psa_documentation_service import retry_failed_push

logger = logging.getLogger(__name__)


async def process_pending_retries() -> None:
    """Process all pending PSA push retries that are due."""
    async with async_session_maker() as db:
        try:
            result = await db.execute(
                select(PsaPostLog)
                .where(
                    PsaPostLog.status == "pending_retry",
                    PsaPostLog.next_retry_at <= datetime.now(timezone.utc),
                    PsaPostLog.retry_count < 3,
                )
                .limit(20)  # Process in batches
            )
            entries = result.scalars().all()

            if not entries:
                return

            logger.info("Processing %d pending PSA push retries", len(entries))

            for entry in entries:
                success = await retry_failed_push(entry, db)
                if success:
                    logger.info("PSA retry succeeded for log %s", entry.id)
                else:
                    logger.warning(
                        "PSA retry %d/%d failed for log %s",
                        entry.retry_count, 3, entry.id,
                    )

            await db.commit()
        except Exception as e:
            logger.error("PSA retry scheduler error: %s", e)
            await db.rollback()