server {
    listen 80;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;
    client_max_body_size 50m;

    # 开启gzip压缩
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/javascript application/json;

    # ========== 反向代理到后端 API ==========
    # 部署时替换此文件，修改 proxy_pass 指向实际后端地址即可

    # SignalR WebSocket（/api/msghub -> /msghub）
    location /api/msghub {
        rewrite ^/api/(.*) /$1 break;
        proxy_pass http://admin-api:8080;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        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;
    }

    # 通用 API 代理（/api/xxx -> /xxx）
    location /api/ {
        rewrite ^/api/(.*) /$1 break;
        proxy_pass http://admin-api:8080;
        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;
        client_max_body_size 50m;
    }

    # ========== 前端静态资源 ==========
    # 处理Vue Router的history模式
    location / {
        try_files $uri $uri/ /index.html;
    }

    # 静态资源缓存
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # 安全头
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;

    # 错误页面
    error_page 404 /index.html;
}