events {
    worker_connections 1024;
}

http {
    include       /etc/nginx/mime.types;
    default_type  application/octet-stream;
    sendfile      on;
    keepalive_timeout 65;

    upstream api {
        server api:8000;
    }

    upstream frontend {
        server frontend:3000;
    }

    server {
        listen 80;
        server_name _;

        client_max_body_size 10M;

        # API
        location /api/ {
            proxy_pass http://api;
            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_connect_timeout 10s;
        }

        # Next.js static assets (long cache)
        location /_next/static/ {
            proxy_pass http://frontend;
            proxy_cache_valid 200 1d;
            add_header Cache-Control "public, max-age=86400, immutable";
        }

        # Everything else → frontend
        location / {
            proxy_pass http://frontend;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            # WebSocket support (Next.js HMR in dev)
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
    }
}