#!/usr/bin/env bash
# Start / stop the development Postgres.
#
# Uses the docker compose plugin when it is available (that is the case on the
# server); when it is not, it brings up the same container with plain docker run.
#
# Either way the port is published on 127.0.0.1 only, matching compose.yaml:
# docker's published ports bypass UFW, so loopback is what keeps the database
# off the internet on a host that has a public address.
#
#   ./scripts/db.sh up | down | psql | logs | reset
set -euo pipefail

NAME=szabadpalya-db
IMAGE=postgres:17-alpine
PORT=5433
USER=szabadpalya
PASS=szabadpalya
DB=szabadpalya
VOLUME=szabadpalya_pgdata

has_compose() { docker compose version >/dev/null 2>&1; }

up() {
  if has_compose; then
    docker compose up -d db
  else
    if docker ps -a --format '{{.Names}}' | grep -qx "$NAME"; then
      docker start "$NAME" >/dev/null
    else
      docker volume create "$VOLUME" >/dev/null
      docker run -d --name "$NAME" --restart unless-stopped \
        -e POSTGRES_USER="$USER" -e POSTGRES_PASSWORD="$PASS" -e POSTGRES_DB="$DB" \
        -p "127.0.0.1:$PORT:5432" -v "$VOLUME:/var/lib/postgresql/data" \
        --health-cmd "pg_isready -U $USER -d $DB" --health-interval 5s \
        "$IMAGE" >/dev/null
    fi
  fi
  printf 'waiting for the database'
  for _ in $(seq 1 40); do
    if docker exec "$NAME" pg_isready -U "$USER" -d "$DB" >/dev/null 2>&1; then
      echo " -> ready (localhost:$PORT)"; return 0
    fi
    printf '.'; sleep 1
  done
  echo " -> did not start in time"; docker logs --tail 20 "$NAME"; return 1
}

case "${1:-up}" in
  up)    up ;;
  down)  has_compose && docker compose stop db || docker stop "$NAME" >/dev/null; echo "stopped" ;;
  psql)  docker exec -it "$NAME" psql -U "$USER" -d "$DB" ;;
  logs)  docker logs -f "$NAME" ;;
  reset) docker rm -f "$NAME" >/dev/null 2>&1 || true
         docker volume rm "$VOLUME" >/dev/null 2>&1 || true
         echo "removed — run again: ./scripts/db.sh up" ;;
  *)     echo "usage: $0 {up|down|psql|logs|reset}"; exit 2 ;;
esac