'use client';

import { Copy, ExternalLink, KeyRound, RefreshCw } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { Dialog, DialogContent, DialogHeader, DialogTitle } from '@/components/ui/dialog';
import { OAuthClient } from '@/lib/api';
import { OAuthEndpoints, buildAuthorizeUrl } from '@/lib/oauth-url';

function CopyRow({ label, value, onCopy }: { label: string; value: string; onCopy: (value: string, label: string) => void }) {
  return (
    <div className="rounded-2xl bg-[#f4f5f8] p-4 text-sm">
      <div className="mb-2 flex items-center justify-between gap-2">
        <span className="font-medium">{label}</span>
        <Button variant="ghost" size="icon" aria-label={`Скопировать ${label}`} onClick={() => onCopy(value, label)}>
          <Copy className="h-4 w-4" />
        </Button>
      </div>
      <code className="block break-all text-xs">{value}</code>
    </div>
  );
}

export function OAuthClientDetailDialog({
  client,
  endpoints,
  open,
  onOpenChange,
  onCopy,
  onRotateSecret,
  onToggleActive
}: {
  client: OAuthClient | null;
  endpoints: OAuthEndpoints;
  open: boolean;
  onOpenChange: (open: boolean) => void;
  onCopy: (value: string, label: string) => void;
  onRotateSecret: (clientId: string) => void;
  onToggleActive: (client: OAuthClient) => void;
}) {
  if (!client) return null;

  const primaryRedirect = client.redirectUris[0] ?? 'https://app.example.com/oauth/callback';
  const scope = client.scopes.join(' ');
  const sampleAuthorizeUrl = buildAuthorizeUrl(endpoints.issuer, {
    clientId: client.clientId,
    redirectUri: primaryRedirect,
    scope
  });

  return (
    <Dialog open={open} onOpenChange={onOpenChange}>
      <DialogContent className="max-h-[90vh] overflow-y-auto sm:max-w-2xl">
        <DialogHeader>
          <DialogTitle>{client.name}</DialogTitle>
        </DialogHeader>

        <div className="space-y-4 text-sm">
          <div className="flex flex-wrap gap-2">
            <span className="rounded-full bg-[#eef4ff] px-3 py-1 text-xs font-medium text-[#1d4ed8]">
              {client.type === 'PUBLIC' ? 'Public' : 'Confidential'}
            </span>
            <span className={`rounded-full px-3 py-1 text-xs font-medium ${client.isActive ? 'bg-emerald-50 text-emerald-700' : 'bg-zinc-100 text-zinc-600'}`}>
              {client.isActive ? 'Активно' : 'Отключено'}
            </span>
            {client.createdByDisplayName ? (
              <span className="rounded-full bg-zinc-100 px-3 py-1 text-xs text-zinc-600">Создал: {client.createdByDisplayName}</span>
            ) : null}
          </div>

          <section className="space-y-3">
            <h3 className="font-medium">Данные клиента</h3>
            <CopyRow label="Client ID" value={client.clientId} onCopy={onCopy} />
            {client.type !== 'PUBLIC' ? (
              <p className="text-xs text-[#667085]">
                Client Secret выдаётся один раз при создании или после «Новый secret». Храните только на backend.
              </p>
            ) : null}
            <CopyRow label="Redirect URI" value={client.redirectUris.join('\n')} onCopy={onCopy} />
            <CopyRow label="Scopes" value={scope} onCopy={onCopy} />
          </section>

          <section className="space-y-3">
            <h3 className="font-medium">Подключение OAuth 2.0 / OpenID Connect</h3>
            <p className="text-xs text-[#667085]">
              Issuer и endpoints берутся из настройки <strong>PUBLIC_API_URL</strong> в админке. В стороннем сервисе укажите issuer = базовый URL API, не authorization endpoint.
            </p>
            <CopyRow label="Issuer (PUBLIC_API_URL)" value={endpoints.issuer} onCopy={onCopy} />
            <CopyRow label="Authorization endpoint" value={endpoints.authorizationEndpoint} onCopy={onCopy} />
            <CopyRow label="Token endpoint" value={endpoints.tokenEndpoint} onCopy={onCopy} />
            <CopyRow label="UserInfo endpoint" value={endpoints.userInfoEndpoint} onCopy={onCopy} />
            <CopyRow label="OIDC Discovery" value={endpoints.openIdConfigurationUrl} onCopy={onCopy} />
            <CopyRow label="Пример authorize URL" value={sampleAuthorizeUrl} onCopy={onCopy} />
          </section>

          <section className="rounded-2xl border border-[#eceef4] p-4">
            <div className="mb-2 flex items-center gap-2 font-medium">
              <KeyRound className="h-4 w-4" />
              Быстрый старт
            </div>
            <ol className="list-decimal space-y-1 pl-5 text-xs text-[#667085]">
              <li>Авторизуйте пользователя в IdP и получите userId.</li>
              <li>Перенаправьте на authorization endpoint с clientId, redirectUri, scope, userId.</li>
              <li>На backend обменяйте code через POST /oauth/token с client_secret.</li>
              <li>Запросите профиль через GET /oauth/userinfo с access token.</li>
            </ol>
            <a
              href={endpoints.openIdConfigurationUrl}
              target="_blank"
              rel="noreferrer"
              className="mt-2 inline-flex items-center gap-1 text-xs text-[#1d4ed8] hover:underline"
            >
              Открыть OpenID Configuration
              <ExternalLink className="h-3.5 w-3.5" />
            </a>
          </section>

          {client.canManage ? (
            <div className="flex flex-wrap gap-2 border-t border-[#eceef4] pt-4">
              {client.type !== 'PUBLIC' ? (
                <Button variant="secondary" size="sm" onClick={() => onRotateSecret(client.clientId)}>
                  <RefreshCw className="h-4 w-4" />
                  Новый secret
                </Button>
              ) : null}
              <Button variant="secondary" size="sm" onClick={() => onToggleActive(client)}>
                {client.isActive ? 'Отключить' : 'Включить'}
              </Button>
            </div>
          ) : null}
        </div>
      </DialogContent>
    </Dialog>
  );
}