server {
    listen 80;
    root /usr/share/nginx/html;
    index index.html;

    # Proxy /api/* → kua-mail container on internal Docker network (strip /api prefix)
    location /api/ {
        proxy_pass http://kua-mail:3800/;
        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 Authorization "Bearer ${KUA_MAIL_ADMIN_TOKEN}";
        proxy_buffering off;
        proxy_read_timeout 600s;
        proxy_http_version 1.1;
        proxy_set_header Connection '';
    }

    # Proxy /events → kua-mail SSE endpoint
    location /events {
        proxy_pass http://kua-mail:3800/events;
        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 Authorization "Bearer ${KUA_MAIL_ADMIN_TOKEN}";
        proxy_buffering off;
        proxy_read_timeout 600s;
        proxy_http_version 1.1;
        proxy_set_header Connection '';
        chunked_transfer_encoding on;
    }

    # SPA: all other routes → index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    gzip on;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml image/svg+xml;
    gzip_min_length 1024;
}