import { redirect } from 'next/navigation';
import Link from 'next/link';
import { requireUser } from '@/lib/session';
import { engine } from '@/lib/engine';
import Header from '@/components/Header';
import { Plus, MessageSquare, Users, Target } from 'lucide-react';

const GOAL_LABELS = {
  educational: 'Обучение',
  news: 'Новости',
  entertainment: 'Развлечение',
  expert: 'Экспертный',
  sales: 'Продажи',
};

export default async function HomePage() {
  const user = await requireUser();
  if (!user) redirect('/login');

  let channels = [];
  try {
    channels = await engine.listChannels(user.id);
  } catch (err) {
    console.error('listChannels failed:', err.message);
  }

  return (
    <>
      <Header user={user} />
      <main className="max-w-6xl mx-auto p-4 sm:p-6">
        <div className="flex items-center justify-between mb-6">
          <div>
            <h1 className="text-2xl font-bold">Мои каналы</h1>
            <p className="text-sm text-gray-500 mt-1">
              Управляй контентом и публикациями
            </p>
          </div>
          <Link href="/channels/new" className="btn-primary">
            <Plus className="w-4 h-4" />
            Добавить канал
          </Link>
        </div>

        {channels.length === 0 ? (
          <div className="card p-12 text-center">
            <div className="inline-flex items-center justify-center w-14 h-14 rounded-full bg-surface2 mb-4">
              <MessageSquare className="w-7 h-7 text-gray-500" />
            </div>
            <h2 className="text-lg font-semibold mb-1">Пока пусто</h2>
            <p className="text-sm text-gray-500 mb-6">
              Создай первый канал, чтобы начать генерировать посты
            </p>
            <Link href="/channels/new" className="btn-primary">
              <Plus className="w-4 h-4" />
              Создать канал
            </Link>
          </div>
        ) : (
          <div className="grid sm:grid-cols-2 lg:grid-cols-3 gap-4">
            {channels.map(ch => (
              <Link
                key={ch.id}
                href={`/channels/${ch.id}`}
                className="card p-5 hover:border-accent/40 transition-colors group"
              >
                <div className="flex items-start justify-between mb-3">
                  <h3 className="font-semibold group-hover:text-accent transition-colors">
                    {ch.name}
                  </h3>
                  <span className="text-xs px-2 py-0.5 rounded-full bg-surface2 text-gray-400">
                    {GOAL_LABELS[ch.goal] || ch.goal}
                  </span>
                </div>
                {ch.niche && (
                  <p className="text-xs text-gray-500 line-clamp-2 mb-3">
                    {ch.niche}
                  </p>
                )}
                <div className="flex items-center gap-4 text-xs text-gray-500">
                  {ch.audience && (
                    <span className="flex items-center gap-1">
                      <Users className="w-3 h-3" />
                      Есть ЦА
                    </span>
                  )}
                  {ch.style?.example_posts?.length > 0 && (
                    <span className="flex items-center gap-1">
                      <Target className="w-3 h-3 text-accent" />
                      {ch.style.example_posts.length} пример{ch.style.example_posts.length === 1 ? '' : 'а'}
                    </span>
                  )}
                </div>
              </Link>
            ))}
          </div>
        )}
      </main>
    </>
  );
}