upstream openwebui {
    # server 10.43.14.141:80;
    server 51.210.13.240:3000;
    keepalive 128;
    keepalive_timeout 1800s;
    keepalive_requests 10000;

}

server {
    if ($host = llm.crenam.space) {
        return 301 https://$host$request_uri;
    } # managed by Certbot


    listen 80;
    listen [::]:80;
    server_name llm.crenam.space;   # ou un autre sous-domaine
    return 301 https://$host$request_uri;


}

server {
    listen 443 ssl http2;
    server_name llm.crenam.space;
        
    ssl_protocols TLSv1.2 TLSv1.3;
    ssl_ciphers 'TLS_AES_128_GCM_SHA256:TLS_AES_256_GCM_SHA384:ECDHE-RSA-AES128-GCM-SHA256';
    ssl_prefer_server_ciphers off;

    gzip on;
    gzip_types text/plain text/css application/javascript image/svg+xml;

    location /api/ {
        proxy_pass http://openwebui;
        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;



        # CRITICAL: Disable all buffering for streaming
        gzip off;
        proxy_buffering off;
        proxy_request_buffering off;
        proxy_cache off;
        tcp_nodelay on;
        add_header X-Accel-Buffering "no" always;
        add_header Cache-Control "no-store" always;


        # Extended timeouts for LLM completions
        proxy_connect_timeout 1800;
        proxy_send_timeout 1800;
        proxy_read_timeout 1800;
    }



    # WebSocket connections need even longer timeouts

    location ~ ^/(ws/|socket\.io/) {
        proxy_pass http://openwebui;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        gzip off;
        proxy_buffering off;
        proxy_cache off;

        # 24-hour timeout for persistent connections
        proxy_connect_timeout 86400;
        proxy_send_timeout 86400;
        proxy_read_timeout 86400;	
    }


    # Static assets - CAN buffer and cache
    location /static/ {
        proxy_pass http://openwebui;
        proxy_buffering on;
        proxy_cache_valid 200 7d;
        add_header Cache-Control "public, max-age=604800, immutable";
    }



    # Default location

    location / {
        proxy_pass http://openwebui;
        proxy_http_version 1.1;
        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;

    }

    ssl_certificate /etc/letsencrypt/live/llm.crenam.space/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/llm.crenam.space/privkey.pem; # managed by Certbot
}