'use client';

import { useState, useEffect } from 'react';
import { useSearchParams } from 'next/navigation';
import Link from 'next/link';

interface Email {
  key: string;
  subject: string;
  date: string;
  processed: string;
  processedAt: string | null;
  processedBy: string | null;
  queuedTo: string | null;
  status: string | null;
}

export default function Emails() {
  const searchParams = useSearchParams();
  const bucket = searchParams.get('bucket');
  const mailbox = searchParams.get('mailbox');
  const [emails, setEmails] = useState<Email[]>([]);
  const [error, setError] = useState<string | null>(null);
  const [loading, setLoading] = useState(true);

  useEffect(() => {
    if (!bucket || !mailbox) {
      setError('Missing parameters');
      setLoading(false);
      return;
    }
    const auth = localStorage.getItem('auth');
    if (!auth) {
      setError('Not authenticated');
      setLoading(false);
      return;
    }

    fetch(`/api/emails?bucket=${bucket}&mailbox=${encodeURIComponent(mailbox)}`, { 
      headers: { Authorization: `Basic ${auth}` } 
    })
      .then(res => {
        if (!res.ok) throw new Error('Failed to fetch emails');
        return res.json();
      })
      .then(data => {
        const sorted = data.sort((a: Email, b: Email) => new Date(b.date).getTime() - new Date(a.date).getTime());
        setEmails(sorted);
      })
      .catch(err => setError(err.message))
      .finally(() => setLoading(false));
  }, [bucket, mailbox]);

  if (loading) return <div className="min-h-screen flex items-center justify-center bg-gray-100">Loading...</div>;
  if (error) return <div className="min-h-screen flex items-center justify-center bg-gray-100 text-red-500">{error}</div>;

  const formatDate = (dateStr: string | null) => {
    if (!dateStr) return 'N/A';
    const date = new Date(dateStr);
    return date.toLocaleString('en-US', { year: '2-digit', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', hour12: false });
  };

  return (
    // 1. "w-full" statt fixer max-width, um den ganzen Schirm zu nutzen
    <div className="min-h-screen bg-gradient-to-b from-blue-50 to-gray-100 p-4 md:p-8">
      <nav className="w-full mx-auto mb-6 bg-white p-4 rounded-lg shadow-sm">
        <ol className="flex flex-wrap space-x-2 text-sm text-gray-500">
          <li><Link href="/" className="hover:text-blue-600">Home</Link></li>
          <li className="mx-1">/</li>
          <li><Link href="/domains" className="hover:text-blue-600">Domains</Link></li>
          <li className="mx-1">/</li>
          <li><Link href={`/mailboxes?bucket=${bucket}`} className="hover:text-blue-600">Mailboxes</Link></li>
          <li className="mx-1">/</li>
          <li className="font-semibold text-gray-700">Emails</li>
        </ol>
      </nav>
      <h1 className="text-3xl font-bold mb-8 text-center text-gray-800">Emails for {mailbox} in {bucket}</h1>
      
      {/* Container für die Tabelle */}
      <div className="w-full bg-white rounded-lg shadow-md overflow-hidden">
        
        {/* 2. "table-fixed": Zwingt die Tabelle, die definierten Breiten einzuhalten 
               und Texte abzuschneiden, statt die Tabelle zu verbreitern.
        */}
        <table className="w-full table-fixed divide-y divide-gray-200 text-xs md:text-sm">
          <thead className="bg-blue-50">
            <tr>
              {/* Subject bekommt keine feste Breite -> nimmt den verfügbaren Platz */}
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-auto">Subject</th>
              
              {/* Anderen Spalten geben wir feste Breiten (w-...), damit sie gut aussehen */}
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-24 md:w-32">Date</th>
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-20 md:w-24">Key</th>
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-16">Proc.</th>
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-24 md:w-32">Proc. At</th>
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-20">Proc. By</th>
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-20">Queued</th>
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-20">Status</th>
              <th className="px-2 py-3 text-left font-medium text-gray-700 uppercase tracking-wider w-16">Act</th>
            </tr>
          </thead>
          <tbody className="bg-white divide-y divide-gray-200">
            {emails.length === 0 ? (
              <tr>
                <td colSpan={9} className="px-4 py-8 text-center text-gray-500">No emails found</td>
              </tr>
            ) : emails.map((e: Email) => (
              <tr key={e.key} className="hover:bg-blue-50 transition">
                
                {/* 3. Subject Cell: 
                    "truncate" macht "..." wenn der Text zu lang ist.
                    "title" zeigt den vollen Text beim Hovern an.
                */}
                <td className="px-2 py-3 text-gray-900 truncate" title={e.subject}>
                  {e.subject}
                </td>

                <td className="px-2 py-3 text-gray-500 truncate">{formatDate(e.date)}</td>
                <td className="px-2 py-3 text-gray-900 truncate" title={e.key}>{e.key}</td>
                <td className="px-2 py-3">
                  <span className={`px-2 py-0.5 rounded-full text-xs font-medium ${e.processed === 'true' ? 'bg-green-100 text-green-800' : 'bg-yellow-100 text-yellow-800'}`}>
                    {e.processed === 'true' ? 'Y' : 'N'}
                  </span>
                </td>
                <td className="px-2 py-3 text-gray-500 truncate">{formatDate(e.processedAt)}</td>
                <td className="px-2 py-3 text-gray-500 truncate" title={e.processedBy || ''}>{e.processedBy || '-'}</td>
                <td className="px-2 py-3 text-gray-500 truncate" title={e.queuedTo || ''}>{e.queuedTo || '-'}</td>
                <td className="px-2 py-3 truncate">
                  {e.status ? (
                    <span className={`px-2 py-0.5 rounded-full text-xs font-medium ${
                      e.status === 'delivered' ? 'bg-green-100 text-green-800' : 
                      e.status === 'failed' ? 'bg-red-100 text-red-800' : 
                      'bg-gray-100 text-gray-800'
                    }`}>
                      {e.status}
                    </span>
                  ) : '-'}
                </td>
                <td className="px-2 py-3 font-medium text-center">
                  <Link href={`/email?bucket=${bucket}&key=${e.key}&mailbox=${encodeURIComponent(mailbox || '')}`} className="text-blue-600 hover:text-blue-900">
                    View
                  </Link>
                </td>
              </tr>
            ))}
          </tbody>
        </table>
      </div>
    </div>
  );
}