worker_processes auto;

events {
    worker_connections 1024;
}

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

    sendfile on;
    keepalive_timeout 65;
    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;

    server {
        listen 80;
        server_name localhost;

        root /usr/share/nginx/html;
        index index.html;

        # Angular app
        location / {
            try_files $uri $uri/ /index.html;
        }

        # Proxy API requests to backend
        location /api/ {
            proxy_pass ${BACKEND_URL};
            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;

            # Increase timeout for long-running deployments
            proxy_connect_timeout 600s;
            proxy_send_timeout 600s;
            proxy_read_timeout 600s;

            # Allow large file uploads
            client_max_body_size 0;
        }
    }
}