#!/bin/bash
# PostgreSQL 17 на Ubuntu — установка службы, пользователь и БД shop
# Запуск: sudo bash scripts/setup-postgres-ubuntu.sh
set -euo pipefail

DB_USER="${DB_USER:-shop}"
DB_PASS="${DB_PASS:-shop}"
DB_NAME="${DB_NAME:-shop}"

if ! command -v psql >/dev/null; then
  echo "PostgreSQL не установлен."
  echo "  apt install -y postgresql-17 postgresql-client-17"
  echo "  systemctl enable --now postgresql"
  exit 1
fi

echo "Запуск PostgreSQL..."
systemctl enable postgresql 2>/dev/null || true
systemctl start postgresql

for i in $(seq 1 30); do
  if pg_isready -h 127.0.0.1 -p 5432 -q 2>/dev/null; then
    break
  fi
  sleep 1
  if [ "$i" -eq 30 ]; then
    echo "Ошибка: PostgreSQL не слушает 127.0.0.1:5432"
    echo "  journalctl -u postgresql -n 30 --no-pager"
    exit 1
  fi
done

echo "Создание пользователя и базы..."
sudo -u postgres psql -v ON_ERROR_STOP=1 <<EOF
DO \$\$
BEGIN
  IF NOT EXISTS (SELECT FROM pg_roles WHERE rolname = '${DB_USER}') THEN
    CREATE ROLE ${DB_USER} LOGIN PASSWORD '${DB_PASS}';
  END IF;
END
\$\$;

SELECT 'CREATE DATABASE ${DB_NAME} OWNER ${DB_USER}'
WHERE NOT EXISTS (SELECT FROM pg_database WHERE datname = '${DB_NAME}')\gexec
EOF

sudo -u postgres psql -v ON_ERROR_STOP=1 -d "${DB_NAME}" <<EOF
GRANT ALL ON SCHEMA public TO ${DB_USER};
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON TABLES TO ${DB_USER};
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT ALL ON SEQUENCES TO ${DB_USER};
EOF

echo ""
echo "PostgreSQL готов."
echo "Добавьте в /opt/shop/.env:"
echo "DATABASE_URL=postgresql://${DB_USER}:${DB_PASS}@127.0.0.1:5432/${DB_NAME}"
echo ""
echo "Проверка: psql \"postgresql://${DB_USER}:${DB_PASS}@127.0.0.1:5432/${DB_NAME}\" -c 'SELECT 1'"