#!/usr/bin/env bash
# =====================================================================
# 使用 Podman 部署实验室预约平台
#
# 用法：
#   ./scripts/podman-deploy.sh up        # 构建镜像并启动（默认）
#   ./scripts/podman-deploy.sh down      # 停止并删除容器（保留数据库数据卷）
#   ./scripts/podman-deploy.sh down-v    # 停止并删除容器与数据卷（重建演示数据）
#   ./scripts/podman-deploy.sh status    # 查看容器状态
#   ./scripts/podman-deploy.sh logs      # 跟随查看日志
#
# 说明：Podman 的 compose 实现（podman-compose）在容器名/镜像名解析上与
# Docker Compose 存在差异，常见报错为：
#   Error: short-name "lab-reservation_backend" did not resolve to an alias ...
# 因此本脚本先显式构建 lab-backend:latest / lab-frontend:latest，
# 再交给 compose 启动，确保 compose 直接使用本地镜像而不会尝试拉取。
# =====================================================================
set -euo pipefail

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

# ---------- 选择可用的 compose 命令 ----------
if podman compose version >/dev/null 2>&1; then
  COMPOSE=(podman compose)
elif command -v podman-compose >/dev/null 2>&1; then
  COMPOSE=(podman-compose)
else
  echo "错误：未找到 podman compose / podman-compose，请先安装其一" >&2
  exit 1
fi

# ---------- 读取 .env 中的端口配置（不 source，避免值中含空格被当作命令执行） ----------
read_env() {
  [ -f .env ] && grep -E "^$1=" .env 2>/dev/null | tail -n 1 | cut -d= -f2- | tr -d '"' || true
}
WEB_PORT="${WEB_PORT:-$(read_env WEB_PORT)}"
BACKEND_PORT="${BACKEND_PORT:-$(read_env BACKEND_PORT)}"
WEB_PORT="${WEB_PORT:-8088}"
BACKEND_PORT="${BACKEND_PORT:-8080}"

# ---------- 构建镜像 ----------
build_images() {
  echo "==> 构建后端镜像 lab-backend:latest（首次构建需拉取 Maven 依赖）"
  podman build -t lab-backend:latest .
  echo "==> 构建前端镜像 lab-frontend:latest"
  podman build -t lab-frontend:latest ./frontend
}

# ---------- 等待 HTTP 服务就绪 ----------
wait_ready() {
  local name="$1" url="$2" tries=60 code
  for _ in $(seq 1 "${tries}"); do
    code="$(curl -s -o /dev/null -w '%{http_code}' "${url}" || true)"
    if [ -n "${code}" ] && [ "${code}" != "000" ]; then
      echo "    ${name} 就绪：${url}（HTTP ${code}）"
      return 0
    fi
    sleep 2
  done
  echo "    警告：${name} 未在预期时间内就绪，请执行 '$0 logs' 查看日志" >&2
  return 1
}

ACTION="${1:-up}"
case "${ACTION}" in
  up)
    build_images
    echo "==> 启动容器"
    "${COMPOSE[@]}" up -d
    echo "==> 等待服务就绪"
    # 后端返回 401 也代表进程已起来
    wait_ready "后端" "http://localhost:${BACKEND_PORT}/api/labs" || true
    wait_ready "前端" "http://localhost:${WEB_PORT}/" || true
    echo
    echo "部署完成："
    echo "  前端地址：http://localhost:${WEB_PORT}"
    echo "  后端地址：http://localhost:${BACKEND_PORT}"
    echo "  演示账号：admin/admin123、teacher1/123456、student1/123456"
    echo
    "${COMPOSE[@]}" ps || podman ps --filter "name=lab-"
    ;;
  build)
    build_images
    ;;
  down)
    "${COMPOSE[@]}" down
    ;;
  down-v)
    "${COMPOSE[@]}" down -v
    ;;
  status)
    "${COMPOSE[@]}" ps || podman ps --filter "name=lab-"
    ;;
  logs)
    "${COMPOSE[@]}" logs -f --tail=100
    ;;
  *)
    echo "用法：$0 [up|build|down|down-v|status|logs]" >&2
    exit 1
    ;;
esac