server {
    listen 8901;
    server_name localhost;

    root /usr/share/nginx/html;
    index index.html;

    # gzip 压缩
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml text/javascript image/svg+xml;
    gzip_min_length 256;

    # 后端 API 反向代理（支持 SSE 长连接）
    location /api/v1/ {
        proxy_pass ${BACKEND_URL}/api/v1/;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;

        # SSE 支持
        proxy_buffering off;
        proxy_cache off;
        proxy_read_timeout 300s;
        proxy_http_version 1.1;
        proxy_set_header Connection "";

        # 禁止浏览器缓存 API 响应
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Pragma "no-cache" always;
    }

    # 健康检查
    location /health {
        proxy_pass ${BACKEND_URL}/health;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
    }

    # Bexell 排程 API 反向代理
    location /bexapi/ {
        proxy_pass https://bexell-scheduling.dongsk.top/api/;
        proxy_set_header Host bexell-scheduling.dongsk.top;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_ssl_server_name on;
    }

    # 鼎捷云 IAM 登录服务反向代理（与 vite.config.ts 中 /iam-api 代理一致）
    location /iam-api/ {
        proxy_pass https://iam.digiwincloud.com.cn/;
        proxy_set_header Host iam.digiwincloud.com.cn;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_ssl_server_name on;

        # 禁止浏览器缓存 API 响应
        add_header Cache-Control "no-cache, no-store, must-revalidate" always;
        add_header Pragma "no-cache" always;
    }

    # SPA 路由 fallback：所有非文件请求回退到 index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # 静态资源长缓存（Vite 构建产物带 hash）
    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SVG / 图片缓存
    location ~* \.(svg|png|jpg|jpeg|gif|ico|webp)$ {
        expires 30d;
        add_header Cache-Control "public";
    }
}