# 构建阶段
FROM node:18-alpine as build-stage

# 设置工作目录
WORKDIR /app

# 复制 package.json 和 package-lock.json（如果有）
COPY package*.json ./

# 安装依赖
RUN npm ci

# 复制项目文件
COPY . .

# 构建应用
RUN npm run build

# 生产阶段
FROM nginx:stable-alpine as production-stage

# 复制自定义nginx配置（如需要）
COPY nginx.conf /etc/nginx/conf.d/default.conf.template

# 从构建阶段复制构建结果到nginx服务目录
COPY --from=build-stage /app/dist /usr/share/nginx/html

# 创建启动脚本
RUN echo '#!/bin/sh \n\
envsubst "\$BACKEND_URL" < /etc/nginx/conf.d/default.conf.template > /etc/nginx/conf.d/default.conf \n\
nginx -g "daemon off;"' > /docker-entrypoint.sh && \
chmod +x /docker-entrypoint.sh

# 暴露80端口
EXPOSE 80

# 健康检查
HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
  CMD wget --quiet --tries=1 --spider http://localhost:80 || exit 1

# 设定启动命令
CMD ["/docker-entrypoint.sh"]