#!/usr/bin/env bash
set -euo pipefail

ROLE="${1:-web}"
shift || true

case "$ROLE" in
  web)
    echo "[entrypoint] Running alembic upgrade head"
    alembic upgrade head
    echo "[entrypoint] Starting hypercorn on :8080"
    # create_app is a factory — the `()` tells hypercorn to call it once
    # and serve the returned Quart (ASGI) app, rather than treating the
    # function itself as the application (which it then mis-invokes as WSGI).
    # Default 4 workers (was 2): each worker is one asyncio loop, and a large
    # file download occupies its worker for the transfer — 2 was too few once the
    # GPU agent + the browser's thumbnail grid hit /images concurrently (they
    # queued behind each other). Env-tunable via HYPERCORN_WORKERS.
    exec hypercorn \
      --bind 0.0.0.0:8080 \
      --workers "${HYPERCORN_WORKERS:-4}" \
      --access-logfile - \
      "backend.app:create_app()"
    ;;

  worker)
    QUEUES="${CELERY_QUEUES:-default,import,thumbnail}"
    CONCURRENCY="${CELERY_CONCURRENCY:-2}"
    echo "[entrypoint] Starting Celery worker queues=$QUEUES concurrency=$CONCURRENCY"
    exec celery -A backend.app.celery_app:celery worker \
      --loglevel=info \
      -Q "$QUEUES" \
      --concurrency="$CONCURRENCY"
    ;;

  scheduler)
    QUEUES="${CELERY_QUEUES:-maintenance,scan}"
    echo "[entrypoint] Starting Celery beat+worker queues=$QUEUES"
    exec celery -A backend.app.celery_app:celery worker \
      --beat \
      --loglevel=info \
      -Q "$QUEUES" \
      --concurrency=1
    ;;

  ml-worker)
    echo "[entrypoint] Ensuring ML models present in /models..."
    python -m backend.app.scripts.download_models
    echo "[entrypoint] Starting ML Celery worker (ml queue)"
    exec celery -A backend.app.celery_app:celery worker \
      --loglevel=info \
      -Q ml \
      --concurrency=1
    ;;

  shell|bash)
    exec /bin/bash "$@"
    ;;

  alembic)
    exec alembic "$@"
    ;;

  *)
    echo "[entrypoint] Unknown role: $ROLE" >&2
    echo "[entrypoint] Valid roles: web | worker | scheduler | ml-worker | shell | alembic" >&2
    exit 1
    ;;
esac