events {
    worker_connections 1024;
}

http {
    # SSE and MP3 streaming — no buffering, long timeouts
    upstream backend {
        server backend:8080;
    }

    upstream web {
        server web:3000;
    }

    server {
        listen 80;

        client_max_body_size 16m;

        # SSE overlay stream
        location ~ ^/api/overlay/[^/]+/stream {
            proxy_pass http://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_buffering off;
            proxy_cache off;
            proxy_read_timeout 120s;
            proxy_set_header Connection '';
            chunked_transfer_encoding on;
        }

        # MP3 proxy — large bodies, streaming
        location /api/proxy/mp3 {
            proxy_pass http://backend;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Range $http_range;
            proxy_set_header If-Range $http_if_range;
            proxy_buffering off;
            proxy_cache off;
            proxy_read_timeout 300s;
        }

        # All other API calls
        location /api/ {
            proxy_pass http://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_read_timeout 30s;
        }

        # Next.js app (with WebSocket for hot reload in dev)
        location / {
            proxy_pass http://web;
            proxy_http_version 1.1;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection 'upgrade';
            proxy_read_timeout 60s;
        }
    }
}