#!/bin/bash
# Установка PostgreSQL 17 (PGDG) или postgresql из Ubuntu
# sudo bash scripts/install-postgresql-ubuntu.sh
set -euo pipefail

if command -v psql >/dev/null; then
  echo "PostgreSQL уже установлен: $(psql --version | head -1)"
  systemctl enable postgresql 2>/dev/null || true
  systemctl start postgresql 2>/dev/null || true
  exit 0
fi

echo "=== Установка PostgreSQL ==="
apt update
apt install -y curl ca-certificates gnupg lsb-release

if [ ! -f /etc/os-release ]; then
  echo "Ошибка: не найден /etc/os-release"
  exit 1
fi
# shellcheck source=/dev/null
. /etc/os-release
CODENAME="${VERSION_CODENAME:-}"
if [ -z "$CODENAME" ]; then
  echo "Ошибка: не удалось определить VERSION_CODENAME (Ubuntu/Debian?)"
  exit 1
fi

install -d /usr/share/postgresql-common/pgdg
curl -fsSL https://www.postgresql.org/media/keys/ACCC4CF8.asc \
  -o /usr/share/postgresql-common/pgdg/apt.postgresql.org.asc

echo "deb [signed-by=/usr/share/postgresql-common/pgdg/apt.postgresql.org.asc] https://apt.postgresql.org/pub/repos/apt ${CODENAME}-pgdg main" \
  > /etc/apt/sources.list.d/pgdg.list

apt update

if apt install -y postgresql-17 postgresql-client-17; then
  echo "Установлен PostgreSQL 17 (PGDG)"
else
  echo "Пакет postgresql-17 недоступен — устанавливаем postgresql из репозитория Ubuntu..."
  apt install -y postgresql postgresql-contrib
fi

systemctl enable postgresql
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
    echo "pg_isready: OK"
    psql --version | head -1
    exit 0
  fi
  sleep 1
done

echo "PostgreSQL установлен, но не отвечает на 127.0.0.1:5432"
echo "  journalctl -u postgresql -n 30 --no-pager"
exit 1