import { useEffect, useState } from 'react';

interface JA4SubnetData {
  subnet: string;
  count: number;
}

interface JA4Analysis {
  ja4: string;
  shared_ips_count: number;
  top_subnets: JA4SubnetData[];
  other_ja4_for_ip: string[];
}

interface JA4AnalysisProps {
  ip: string;
}

export function JA4Analysis({ ip }: JA4AnalysisProps) {
  const [data, setData] = useState<JA4Analysis | null>(null);
  const [loading, setLoading] = useState(true);
  const [error, setError] = useState<string | null>(null);

  useEffect(() => {
    const fetchJA4Analysis = async () => {
      setLoading(true);
      try {
        const response = await fetch(`/api/analysis/${encodeURIComponent(ip)}/ja4`);
        if (!response.ok) throw new Error('Erreur chargement JA4');
        const result = await response.json();
        setData(result);
      } catch (err) {
        setError(err instanceof Error ? err.message : 'Erreur inconnue');
      } finally {
        setLoading(false);
      }
    };

    fetchJA4Analysis();
  }, [ip]);

  if (loading) {
    return (
      <div className="bg-background-secondary rounded-lg p-6">
        <div className="text-center text-text-secondary">Chargement...</div>
      </div>
    );
  }

  if (error || !data || !data.ja4) {
    return (
      <div className="bg-background-secondary rounded-lg p-6">
        <div className="text-center text-text-secondary">JA4 non disponible</div>
      </div>
    );
  }

  return (
    <div className="bg-background-secondary rounded-lg p-6">
      <div className="flex items-center justify-between mb-4">
        <h3 className="text-lg font-medium text-text-primary">3. JA4 FINGERPRINT ANALYSIS</h3>
        {data.shared_ips_count > 50 && (
          <span className="bg-threat-high text-white px-3 py-1 rounded text-xs font-medium">
            🔴 {data.shared_ips_count} IPs
          </span>
        )}
      </div>

      <div className="space-y-6">
        {/* JA4 Fingerprint */}
        <div>
          <div className="text-sm text-text-secondary mb-2">JA4 Fingerprint</div>
          <div className="bg-background-card rounded-lg p-3 font-mono text-sm text-text-primary break-all">
            {data.ja4}
          </div>
        </div>

        <div className="grid grid-cols-1 md:grid-cols-2 gap-6">
          {/* IPs avec même JA4 */}
          <div>
            <div className="text-sm text-text-secondary mb-2">
              IPs avec le MÊME JA4 (24h)
            </div>
            <div className="text-3xl font-bold text-text-primary mb-2">
              {data.shared_ips_count}
            </div>
            {data.shared_ips_count > 50 && (
              <div className="text-threat-high text-sm">
                🔴 PATTERN: Même outil/bot sur {data.shared_ips_count} IPs
              </div>
            )}
          </div>

          {/* Autres JA4 pour cette IP */}
          <div>
            <div className="text-sm text-text-secondary mb-2">
              Autres JA4 pour cette IP
            </div>
            {data.other_ja4_for_ip.length > 0 ? (
              <div className="space-y-1">
                {data.other_ja4_for_ip.slice(0, 3).map((ja4, idx) => (
                  <div key={idx} className="bg-background-card rounded p-2 font-mono text-xs text-text-primary truncate">
                    {ja4}
                  </div>
                ))}
                {data.other_ja4_for_ip.length > 3 && (
                  <div className="text-text-secondary text-xs">
                    +{data.other_ja4_for_ip.length - 3} autres
                  </div>
                )}
              </div>
            ) : (
              <div className="text-text-secondary text-sm">
                1 seul JA4 → Comportement stable
              </div>
            )}
          </div>
        </div>

        {/* Top subnets */}
        {data.top_subnets.length > 0 && (
          <div>
            <div className="text-sm text-text-secondary mb-2">
              Top subnets pour ce JA4
            </div>
            <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-2">
              {data.top_subnets.map((subnet, idx) => (
                <div
                  key={idx}
                  className="bg-background-card rounded-lg p-3 flex items-center justify-between"
                >
                  <div className="font-mono text-sm text-text-primary">{subnet.subnet}</div>
                  <div className="text-text-primary font-bold">{subnet.count} IPs</div>
                </div>
              ))}
            </div>
          </div>
        )}
      </div>
    </div>
  );
}