#!/bin/bash
# Интерактивный установщик Shop
#   bash scripts/install.sh
#   sudo bash scripts/install.sh   (нативная установка на Ubuntu)
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
REPO_ROOT="$(cd "$SCRIPT_DIR/.." && pwd)"

# --- ввод ---
read_default() {
  local prompt="$1"
  local default="$2"
  local value
  if [ -n "$default" ]; then
    read -rp "$prompt [$default]: " value
    echo "${value:-$default}"
  else
    read -rp "$prompt: " value
    echo "$value"
  fi
}

read_secret() {
  local prompt="$1"
  local value
  read -rsp "$prompt" value
  echo ""
  echo "$value"
}

read_secret_confirm() {
  local prompt="$1"
  local a b
  while true; do
    a=$(read_secret "$prompt")
    b=$(read_secret "Повторите: ")
    if [ "$a" = "$b" ]; then
      echo "$a"
      return
    fi
    echo "Пароли не совпадают. Попробуйте снова."
  done
}

gen_secret() {
  if command -v openssl >/dev/null; then
    openssl rand -hex 32
  else
    head -c 32 /dev/urandom | od -An -tx1 | tr -d ' \n'
  fi
}

# Безопасная запись значения в .env (одинарные кавычки)
env_quote() {
  printf "'%s'" "$(printf '%s' "$1" | sed "s/'/'\\\\''/g")"
}

email_ok() {
  [[ "$1" =~ ^[^\s@]+@[^\s@]+\.[^\s@]+$ ]]
}

# --- главная ---
clear 2>/dev/null || true
echo "============================================"
echo "  Shop — интерактивная установка"
echo "============================================"
echo ""

# Каталог установки
if [ -f "$REPO_ROOT/package.json" ]; then
  INSTALL_DIR=$(read_default "Каталог установки" "$REPO_ROOT")
else
  INSTALL_DIR=$(read_default "Каталог установки" "/opt/shop")
  if [ ! -f "$INSTALL_DIR/package.json" ]; then
    GIT_URL=$(read_default "URL git-репозитория" "")
    if [ -z "$GIT_URL" ]; then
      echo "Ошибка: укажите URL репозитория или запустите установщик из клона."
      exit 1
    fi
    echo "Клонирование $GIT_URL -> $INSTALL_DIR ..."
    mkdir -p "$(dirname "$INSTALL_DIR")"
    git clone "$GIT_URL" "$INSTALL_DIR"
  fi
fi

cd "$INSTALL_DIR"
export SHOP_ROOT="$INSTALL_DIR"

# Режим
echo ""
echo "Способ установки:"
echo "  1) Docker Compose (PostgreSQL + приложение в контейнерах)"
echo "  2) Без Docker (Ubuntu: Node.js + PostgreSQL + systemd)"
echo ""
MODE=$(read_default "Выберите [1/2]" "1")

# Администратор
echo ""
echo "--- Администратор магазина (единственный admin) ---"
ADMIN_EMAIL=$(read_default "Email администратора" "admin@site.com")
while ! email_ok "$ADMIN_EMAIL"; do
  echo "Некорректный email."
  ADMIN_EMAIL=$(read_default "Email администратора" "admin@site.com")
done
ADMIN_NAME=$(read_default "Имя администратора" "Администратор")
ADMIN_PASSWORD=$(read_secret_confirm "Пароль администратора: ")

# База данных
echo ""
echo "--- PostgreSQL ---"
PG_USER=$(read_default "Пользователь БД" "shop")
PG_PASS=$(read_secret_confirm "Пароль БД: ")
PG_DB=$(read_default "Имя базы данных" "shop")

if [ "$MODE" = "1" ]; then
  PG_HOST="postgres"
  PG_PORT="5432"
  APP_PORT=$(read_default "Порт сайта на хосте" "3000")
  TRUST_PROXY="0"
  echo ""
  read -rp "Включить Caddy (HTTPS, порты 80/443)? [y/N]: " USE_CADDY
  if [[ "${USE_CADDY,,}" == "y" || "${USE_CADDY,,}" == "yes" ]]; then
    TRUST_PROXY="1"
    USE_CADDY=1
  else
    USE_CADDY=0
  fi
else
  PG_HOST=$(read_default "Хост PostgreSQL" "127.0.0.1")
  PG_PORT=$(read_default "Порт PostgreSQL" "5432")
  APP_PORT="3000"
  TRUST_PROXY=$(read_default "За reverse proxy (Caddy)? TRUST_PROXY [1/0]" "1")
  USE_CADDY=0
fi

# Сайт и секрет
echo ""
echo "--- Прочие настройки ---"
if [ "$MODE" = "1" ] && [ "$USE_CADDY" = "1" ]; then
  SITE_DEFAULT="https://shop.example.com"
else
  SITE_DEFAULT="http://localhost:${APP_PORT}"
fi
SITE_URL=$(read_default "URL сайта (SITE_URL)" "$SITE_DEFAULT")
SESSION_SECRET=$(read_default "SESSION_SECRET (Enter = сгенерировать)" "")
SESSION_SECRET=${SESSION_SECRET:-$(gen_secret)}

echo ""
read -rp "Настроить SMTP для писем? [y/N]: " SET_SMTP
SMTP_BLOCK=""
if [[ "${SET_SMTP,,}" == "y" || "${SET_SMTP,,}" == "yes" ]]; then
  SMTP_HOST=$(read_default "SMTP_HOST" "smtp.example.com")
  SMTP_PORT=$(read_default "SMTP_PORT" "587")
  SMTP_USER=$(read_default "SMTP_USER" "")
  SMTP_PASS=$(read_secret "SMTP_PASS: ")
  SMTP_FROM=$(read_default "SMTP_FROM" "shop@example.com")
  SMTP_BLOCK="# SMTP
SMTP_HOST=${SMTP_HOST}
SMTP_PORT=${SMTP_PORT}
SMTP_SECURE=false
SMTP_USER=${SMTP_USER}
SMTP_PASS=${SMTP_PASS}
SMTP_FROM=${SMTP_FROM}
"
fi

DATABASE_URL="postgresql://${PG_USER}:${PG_PASS}@${PG_HOST}:${PG_PORT}/${PG_DB}"

# --- запись .env ---
ENV_FILE="$INSTALL_DIR/.env"
APP_HOST=$([ "$MODE" = "1" ] && echo "0.0.0.0" || echo "127.0.0.1")
{
  echo "# Создано scripts/install.sh $(date -Iseconds)"
  echo ""
  echo "PORT=${APP_PORT}"
  echo "HOST=${APP_HOST}"
  echo "NODE_ENV=production"
  echo "TRUST_PROXY=${TRUST_PROXY}"
  echo "SESSION_SECRET=$(env_quote "$SESSION_SECRET")"
  echo ""
  echo "ADMIN_EMAIL=$(env_quote "$ADMIN_EMAIL")"
  echo "ADMIN_PASSWORD=$(env_quote "$ADMIN_PASSWORD")"
  echo "ADMIN_NAME=$(env_quote "$ADMIN_NAME")"
  echo ""
  echo "SITE_URL=$(env_quote "$SITE_URL")"
  echo ""
  if [ -n "$SMTP_BLOCK" ]; then
    echo "$SMTP_BLOCK"
  fi
  echo "# PostgreSQL"
  echo "POSTGRES_USER=$(env_quote "$PG_USER")"
  echo "POSTGRES_PASSWORD=$(env_quote "$PG_PASS")"
  echo "POSTGRES_DB=$(env_quote "$PG_DB")"
  echo "DATABASE_URL=$(env_quote "$DATABASE_URL")"
  echo "PGHOST=$(env_quote "$PG_HOST")"
  echo "PGPORT=${PG_PORT}"
  echo "PGUSER=$(env_quote "$PG_USER")"
  echo "PGPASSWORD=$(env_quote "$PG_PASS")"
  echo "PGDATABASE=$(env_quote "$PG_DB")"
} > "$ENV_FILE"
chmod 600 "$ENV_FILE" 2>/dev/null || true
echo ""
echo "Сохранено: $ENV_FILE"

# --- установка ---
echo ""
if [ "$MODE" = "1" ]; then
  echo "=== Установка через Docker ==="
  if ! command -v docker >/dev/null; then
    echo "Ошибка: Docker не установлен. Установите Docker и повторите."
    exit 1
  fi
  if ! docker compose version >/dev/null 2>&1; then
    echo "Ошибка: нужен Docker Compose v2 (docker compose)."
    exit 1
  fi
  COMPOSE_CMD=(docker compose)
  if [ "$USE_CADDY" = "1" ]; then
    echo "Запуск: postgres + app + caddy ..."
    "${COMPOSE_CMD[@]}" --profile proxy up -d --build
  else
    echo "Запуск: postgres + app ..."
    "${COMPOSE_CMD[@]}" up -d --build
  fi
  echo "Ожидание health..."
  sleep 5
  curl -sf "http://127.0.0.1:${APP_PORT}/health" && echo "" || echo "Проверьте: docker compose logs app"
else
  echo "=== Установка без Docker (Ubuntu) ==="
  if [ "$(id -u)" -ne 0 ]; then
    echo "Запустите с root: sudo bash scripts/install.sh"
    exit 1
  fi
  bash "$SCRIPT_DIR/install-postgresql-ubuntu.sh"
  export DB_USER="$PG_USER" DB_PASS="$PG_PASS" DB_NAME="$PG_DB"
  bash "$SCRIPT_DIR/setup-postgres-ubuntu.sh"
  npm install --omit=dev
  bash "$SCRIPT_DIR/install-shop-service.sh"
fi

echo ""
echo "============================================"
echo "  Установка завершена"
echo "============================================"
echo "  Каталог:    $INSTALL_DIR"
echo "  Сайт:       $SITE_URL"
echo "  Админ:      $ADMIN_EMAIL"
if [ "$MODE" = "1" ]; then
  echo "  Порт:       $APP_PORT"
  echo "  Логи:       docker compose -f $INSTALL_DIR/docker-compose.yml logs -f"
else
  echo "  Служба:     systemctl status shop"
  echo "  Health:     curl http://127.0.0.1:3000/health"
fi
echo "  Обновление: bash $INSTALL_DIR/scripts/server-update.sh"
echo "============================================"