worker_processes auto;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
    use epoll;
}

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

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 300;
    large_client_header_buffers 8 128k;
    client_max_body_size 5000M;          # крупные загрузки (снимки, облака точек)

    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css application/json application/javascript text/xml application/xml;

    access_log /var/log/nginx/access.log;
    error_log  /var/log/nginx/error.log;

    # корректная поддержка websocket/keep-alive для upstream'ов
    map $http_upgrade $connection_upgrade {
        default upgrade;
        ''      close;
    }

    upstream backend  { server backend:8000; }
    upstream frontend { server frontend:80; }
    upstream minio_s3 { server minio:9000; }

    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;

    server {
        listen 80;
        listen [::]:80;

        # healthcheck самого nginx
        location = /healthz {
            access_log off;
            add_header Content-Type text/plain;
            return 200 "ok\n";
        }

        # --- Django backend: REST API + админка ---
        location /api/ {
            proxy_pass http://backend;
        }
        location /admin/ {
            proxy_pass http://backend;
        }

        # --- MinIO: объекты бакета ---
        # Путь НЕ переписываем — иначе ломается подпись SigV4. Чтобы медиа
        # открывались из браузера, задай backend'у S3_HOST = http://<хост>:9080
        # (сейчас в compose там http://minio:9000, внутренний адрес).
        location /sarex-media-storage/ {
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_pass http://minio_s3;
        }

        # --- Frontend SPA (host-приложение само отдаёт статику и роутинг) ---
        location / {
            proxy_http_version 1.1;
            proxy_set_header Upgrade    $http_upgrade;
            proxy_set_header Connection $connection_upgrade;
            proxy_pass http://frontend;
        }
    }
}