user  nginx;
worker_processes  auto;

events {
  worker_connections  1024;
  multi_accept on;
}

http {
  include       /etc/nginx/mime.types;
  default_type  application/octet-stream;

  sendfile        on;
  tcp_nopush      on;
  tcp_nodelay     on;
  keepalive_timeout  65;
  types_hash_max_size 4096;

  gzip on;
  gzip_comp_level 5;
  gzip_min_length 1024;
  gzip_proxied any;
  gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml;

  upstream app_backend {
    server translator-app-prod:12010 max_fails=3 fail_timeout=10s;
    keepalive 64;
  }

  server {
    listen 12010;
    server_name _;

    # Adjust for document uploads (can be large)
    client_max_body_size 500m;

    # Proxy API requests to Flask/Gunicorn
    location /api/ {
      proxy_pass http://app_backend;
      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;
      proxy_read_timeout 600s;  # Longer timeout for translation processing
      proxy_send_timeout 600s;
      proxy_connect_timeout 10s;
      proxy_buffering off;  # Disable buffering for real-time progress
    }

    # All other routes (frontend SPA and static) via backend
    location / {
      proxy_pass http://app_backend;
      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;
      proxy_read_timeout 120s;
      proxy_send_timeout 120s;
      proxy_connect_timeout 5s;
      proxy_buffering on;
      proxy_buffers 32 32k;
      proxy_busy_buffers_size 64k;
    }
  }
}