user nginx;
worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
}

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

    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent" "$http_x_forwarded_for"';

    access_log /var/log/nginx/access.log main;

    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    client_max_body_size 100M;

    # Redirect HTTP to HTTPS
    server {
        listen 80;
        server_name {{ paperclip_domain }};
        return 301 https://$server_name$request_uri;
    }

    # HTTPS server
    server {
        listen 443 ssl http2;
        server_name {{ paperclip_domain }};

        # SSL certificates from certbot
        ssl_certificate /etc/nginx/certs/live/{{ paperclip_domain }}/fullchain.pem;
        ssl_certificate_key /etc/nginx/certs/live/{{ paperclip_domain }}/privkey.pem;

        # SSL configuration
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers HIGH:!aNULL:!MD5;
        ssl_prefer_server_ciphers on;
        ssl_session_cache shared:SSL:10m;
        ssl_session_timeout 10m;

        # Security headers
        add_header Strict-Transport-Security "max-age=31536000; includeSubDomains" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-XSS-Protection "1; mode=block" always;

        location / {
            proxy_pass http://127.0.0.1:{{ paperclip_port }};
            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_set_header X-Forwarded-Host $server_name;
            proxy_set_header X-Forwarded-Port $server_port;

            # WebSocket support
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

            # Timeouts
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;

            # Buffering
            proxy_buffering off;
            proxy_request_buffering off;
        }

        # Health check endpoint (no auth)
        location /health {
            proxy_pass http://127.0.0.1:{{ paperclip_port }}/health;
            access_log off;
        }
    }
}