import { notFound } from 'next/navigation';
import Link from 'next/link';
import Header from '@/components/Header';
import Footer from '@/components/Footer';
import ArticleCard from '@/components/ArticleCard';
import { getSeries } from '@/lib/engine';
import { Sparkles, Plug, Zap, Layers, ArrowLeft } from 'lucide-react';

const ICONS = { Sparkles, Plug, Zap, Layers };
const COLORS = {
  emerald: { bg: 'rgb(16 185 129 / 0.1)', text: '#10b981' },
  teal:    { bg: 'rgb(20 184 166 / 0.1)', text: '#14b8a6' },
  amber:   { bg: 'rgb(245 158 11 / 0.1)', text: '#f59e0b' },
  indigo:  { bg: 'rgb(99 102 241 / 0.1)', text: '#6366f1' },
};

export const dynamic = 'force-dynamic';

export async function generateMetadata({ params }) {
  const { slug } = await params;
  const s = await getSeries(slug);
  if (!s) return { title: 'Серия не найдена' };
  return {
    title: s.title,
    description: s.intro,
  };
}

export default async function SeriesPage({ params }) {
  const { slug } = await params;
  const s = await getSeries(slug);
  if (!s) notFound();
  const Icon = ICONS[s.icon] || Layers;
  const color = COLORS[s.color] || COLORS.emerald;

  return (
    <>
      <Header />
      <main className="pt-8 pb-16">
        <div className="container-wide mb-8">
          <Link href="/" className="btn btn-ghost text-sm mb-6 -ml-2">
            <ArrowLeft className="w-4 h-4" /> Все статьи
          </Link>

          <div className="flex items-center gap-3 mb-4">
            <div
              className="w-12 h-12 sm:w-14 sm:h-14 rounded-xl flex items-center justify-center"
              style={{ background: color.bg }}
            >
              <Icon className="w-6 h-6 sm:w-7 sm:h-7" style={{ color: color.text }} />
            </div>
            <div className="text-xs mute uppercase tracking-widest">Серия</div>
          </div>

          <h1 className="text-3xl sm:text-5xl font-bold ink leading-tight mb-3">
            {s.title}
          </h1>
          {s.intro && (
            <p className="mute text-base sm:text-lg max-w-2xl leading-relaxed">{s.intro}</p>
          )}
          <div className="text-xs mute mt-4">
            {s.articles?.length || 0} {(s.articles?.length || 0) === 1 ? 'материал' : 'материалов'} в серии
          </div>
        </div>

        {s.articles?.length > 0 ? (
          <div className="container-wide">
            <div className="grid sm:grid-cols-2 lg:grid-cols-3 gap-5">
              {s.articles.map(a => <ArticleCard key={a.id} article={a} />)}
            </div>
          </div>
        ) : (
          <div className="container-wide">
            <div className="article-card p-8 text-center mute">
              Скоро здесь появятся статьи. Серия только формируется.
            </div>
          </div>
        )}
      </main>
      <Footer />
    </>
  );
}