server {
    listen 3000;
    server_name localhost;
    root /usr/share/nginx/html;
    index index.html;

    # 上傳大小限制（模型檔最大 500MB）
    client_max_body_size 500m;

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

    # 靜態文件緩存
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SSE 端點 — 必須關閉 buffering（rewrite /api → /）
    location ~ ^/api/(jobs/.*/events)$ {
        proxy_pass http://scheduler:4000/$1;
        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_buffering off;
        proxy_cache off;
        proxy_read_timeout 86400s;
        proxy_send_timeout 86400s;
        chunked_transfer_encoding on;
        gzip off;
    }

    # API 代理（rewrite /api → /）
    location /api/ {
        proxy_pass http://scheduler:4000/;
        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;
    }

    # SPA路由支持
    location / {
        try_files $uri $uri/ /index.html;
    }

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