import { prisma } from '@/lib/db';
import { getSession } from '@/lib/auth';
import { redirect } from 'next/navigation';
import { UserPlus, Trash2, KeyRound, ShieldCheck } from 'lucide-react';
import { createUser, deleteUser, changePassword } from './actions';

export default async function UsersAdminPage() {
  const session = await getSession();
  if (!session) redirect('/admin/login');

  const users = await prisma.user.findMany({
    orderBy: { createdAt: 'asc' },
  });

  return (
    <div>
      <h1 className="text-3xl font-bold mb-8">Kullanıcı Yönetimi</h1>

      <div className="grid grid-cols-1 lg:grid-cols-2 gap-8">
        {/* Sol: Kullanıcı listesi */}
        <div className="space-y-6">
          {/* Yeni kullanıcı ekle */}
          <div className="bg-white dark:bg-slate-900 rounded-2xl shadow-sm border border-slate-200 dark:border-slate-800 p-6">
            <h2 className="text-xl font-bold mb-6 flex items-center gap-2">
              <UserPlus className="w-5 h-5 text-blue-500" />
              Yeni Kullanıcı Ekle
            </h2>
            <form action={createUser} className="space-y-4">
              <div>
                <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1">
                  Kullanıcı Adı
                </label>
                <input
                  type="text"
                  name="username"
                  required
                  placeholder="kullanici_adi"
                  className="w-full px-4 py-2.5 rounded-lg border border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 text-slate-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-blue-500"
                />
              </div>
              <div>
                <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1">
                  Şifre
                </label>
                <input
                  type="password"
                  name="password"
                  required
                  placeholder="••••••••"
                  minLength={6}
                  className="w-full px-4 py-2.5 rounded-lg border border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 text-slate-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-blue-500"
                />
              </div>
              <div>
                <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1">
                  Şifre Tekrar
                </label>
                <input
                  type="password"
                  name="confirmPassword"
                  required
                  placeholder="••••••••"
                  minLength={6}
                  className="w-full px-4 py-2.5 rounded-lg border border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 text-slate-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-blue-500"
                />
              </div>
              <button
                type="submit"
                className="w-full px-4 py-2.5 bg-blue-600 hover:bg-blue-700 text-white font-semibold rounded-lg transition-colors"
              >
                Kullanıcı Ekle
              </button>
            </form>
          </div>

          {/* Mevcut kullanıcılar */}
          <div className="bg-white dark:bg-slate-900 rounded-2xl shadow-sm border border-slate-200 dark:border-slate-800 p-6">
            <h2 className="text-xl font-bold mb-6 flex items-center gap-2">
              <ShieldCheck className="w-5 h-5 text-green-500" />
              Mevcut Kullanıcılar ({users.length})
            </h2>
            <div className="space-y-3">
              {users.map((user: any) => (
                <div
                  key={user.id}
                  className="flex items-center justify-between p-4 rounded-lg border border-slate-100 dark:border-slate-800 bg-slate-50 dark:bg-slate-800/50"
                >
                  <div>
                    <p className="font-semibold text-slate-800 dark:text-white">{user.username}</p>
                    <p className="text-xs text-slate-500 dark:text-slate-400 mt-0.5">
                      {new Date(user.createdAt).toLocaleDateString('tr-TR', {
                        day: 'numeric',
                        month: 'long',
                        year: 'numeric',
                      })}
                    </p>
                  </div>
                  {users.length > 1 && (
                    <form action={deleteUser}>
                      <input type="hidden" name="id" value={user.id} />
                      <button
                        type="submit"
                        title="Kullanıcıyı Sil"
                        className="p-2 text-red-400 hover:text-red-600 hover:bg-red-50 dark:hover:bg-red-900/20 rounded-lg transition-colors"
                        onClick={(e) => {
                          if (!confirm(`"${user.username}" kullanıcısı silinsin mi?`)) {
                            e.preventDefault();
                          }
                        }}
                      >
                        <Trash2 className="w-4 h-4" />
                      </button>
                    </form>
                  )}
                </div>
              ))}
              {users.length === 0 && (
                <p className="text-slate-500 text-sm text-center py-4">Kullanıcı bulunamadı.</p>
              )}
            </div>
          </div>
        </div>

        {/* Sağ: Şifre değiştir */}
        <div className="bg-white dark:bg-slate-900 rounded-2xl shadow-sm border border-slate-200 dark:border-slate-800 p-6 h-fit">
          <h2 className="text-xl font-bold mb-6 flex items-center gap-2">
            <KeyRound className="w-5 h-5 text-amber-500" />
            Şifre Değiştir
          </h2>
          <form action={changePassword} className="space-y-4">
            <div>
              <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1">
                Kullanıcı
              </label>
              <select
                name="userId"
                required
                className="w-full px-4 py-2.5 rounded-lg border border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 text-slate-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-blue-500"
              >
                <option value="">Kullanıcı seçin…</option>
                {users.map((user: any) => (
                  <option key={user.id} value={user.id}>
                    {user.username}
                  </option>
                ))}
              </select>
            </div>
            <div>
              <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1">
                Yeni Şifre
              </label>
              <input
                type="password"
                name="newPassword"
                required
                placeholder="••••••••"
                minLength={6}
                className="w-full px-4 py-2.5 rounded-lg border border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 text-slate-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-blue-500"
              />
            </div>
            <div>
              <label className="block text-sm font-medium text-slate-700 dark:text-slate-300 mb-1">
                Yeni Şifre Tekrar
              </label>
              <input
                type="password"
                name="confirmPassword"
                required
                placeholder="••••••••"
                minLength={6}
                className="w-full px-4 py-2.5 rounded-lg border border-slate-200 dark:border-slate-700 bg-white dark:bg-slate-800 text-slate-900 dark:text-white focus:outline-none focus:ring-2 focus:ring-blue-500"
              />
            </div>
            <button
              type="submit"
              className="w-full px-4 py-2.5 bg-amber-500 hover:bg-amber-600 text-white font-semibold rounded-lg transition-colors"
            >
              Şifreyi Güncelle
            </button>
          </form>
        </div>
      </div>
    </div>
  );
}