server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/javascript application/json application/xml+rss;

    client_max_body_size 800m;

    # SPA routing - all routes to index.html
    # 注意：不能加 $uri/，否则 /assets 等与构建产物目录同名的路由会被当成目录访问，返回 403
    location / {
        try_files $uri /index.html;
    }

    # API proxy
    # Production environment: proxy to production API container on isolated network
    # Use static container name to avoid URI stripping issues with variable-based proxy_pass
    resolver 127.0.0.11 valid=10s;
    resolver_timeout 5s;
    location /api/ {
        proxy_pass http://xiaoxia-api-production:8000/api/;
        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;
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
        proxy_request_buffering off;
    }

    # Generated files proxy
    location /generated-files/ {
        alias /app/generated/;
    }

    # Assets with legacy fallback (higher priority than generic static regex)
    # 部署期间，缓存了旧版 index.html 的用户会请求旧版带 hash 的 assets 文件
    # 先在当前镜像中找，找不到去 legacy-assets 目录找（从旧版本容器中备份的）
    location ^~ /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        try_files $uri /assets-legacy$uri =404;
    }

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