import type { Metadata } from "next";
import Link from "next/link";
import { Breadcrumb } from "@/app/components/Breadcrumb";
import {
  pageTop,
  primaryButton,
  secondaryButtonDark,
  secondaryButtonLight,
  textLink,
} from "@/app/components/button-styles";
import WhatsAppLink from "@/app/components/WhatsAppLink";
import { safeJsonLd } from "@/lib/jsonld";
import { buildBreadcrumbList, buildPageSocialMetadata } from "@/lib/seo";
import {
  type CaseStudyContent,
  clientCases,
  labCases,
  siteUrl,
} from "@/lib/site-content";
import { CaseCoverLink } from "./_components/CaseCoverLink";

const pageUrl = `${siteUrl}/cases`;
const pageTitle = "Cases: sites e sistemas para empresas";
const pageDescription =
  "Veja o que já foi feito para empresas: loja virtual com pedido pelo WhatsApp, site com painel para o dono e páginas institucionais.";
const allCases = [...clientCases, ...labCases];

export const metadata: Metadata = {
  title: pageTitle,
  description: pageDescription,
  ...buildPageSocialMetadata({
    url: pageUrl,
    title: pageTitle,
    description: pageDescription,
    type: "website",
  }),
};

function CaseCard({
  caseStudy,
  withCover,
  ctaLabel,
  priority = false,
}: {
  caseStudy: CaseStudyContent;
  withCover: boolean;
  ctaLabel: string;
  /** Capa que abre a página (a primeira, o maior elemento visível): carrega antes das demais. */
  priority?: boolean;
}) {
  return (
    <article className="ds-card !h-auto">
      {withCover ? (
        <CaseCoverLink
          id={caseStudy.id}
          title={caseStudy.title}
          demoUrl={caseStudy.demoUrl}
          priority={priority}
          prefetch={false}
        />
      ) : null}
      <div className="ds-kicker">{caseStudy.title}</div>
      <h3 className="ds-card-title">{caseStudy.headline}</h3>
      <p className="ds-copy">{caseStudy.summary}</p>
      <div className="mt-sp-6 flex flex-wrap items-center gap-sp-3">
        <Link
          href={`/cases/${caseStudy.id}`}
          prefetch={false}
          className={secondaryButtonLight}
        >
          {ctaLabel}
        </Link>
        {caseStudy.demoUrl ? (
          <a
            href={caseStudy.demoUrl}
            className={textLink}
            target="_blank"
            rel="noreferrer"
          >
            Abrir o site
          </a>
        ) : null}
      </div>
    </article>
  );
}

export default function CasesPage() {
  const jsonLd = {
    "@context": "https://schema.org",
    "@graph": [
      {
        "@type": "CollectionPage",
        "@id": `${pageUrl}#page`,
        name: pageTitle,
        url: pageUrl,
        description: pageDescription,
      },
      {
        "@type": "ItemList",
        itemListElement: allCases.map((caseStudy, index) => ({
          "@type": "ListItem",
          position: index + 1,
          name: caseStudy.title,
          url: `${pageUrl}/${caseStudy.id}`,
        })),
      },
      buildBreadcrumbList(pageUrl, [
        ["Início", siteUrl],
        ["Cases", pageUrl],
      ] as const),
    ],
  };

  return (
    <main>
      <script type="application/ld+json">{safeJsonLd(jsonLd)}</script>

      <section className={`ds-section ds-section-dark ${pageTop}`}>
        <div className="ds-section-shell">
          <div className="max-w-[860px]">
            <Breadcrumb
              items={[
                { label: "Início", href: "/" },
                { label: "Cases", href: "/cases" },
              ]}
            />
            <p className="ds-eyebrow">Trabalhos entregues</p>
            <h1 className="ds-section-title max-w-[18ch] text-balance text-white">
              Veja o que já fiz para empresas.
            </h1>
            <p className="ds-copy max-w-[64ch] !text-[rgba(255,255,255,0.78)]">
              {pageDescription}
            </p>
          </div>
        </div>
      </section>

      <section className="ds-section" aria-labelledby="cases-clientes">
        <div className="ds-section-shell">
          <h2 id="cases-clientes" className="ds-card-title !mt-0">
            Projetos de clientes
          </h2>
          <div className="ds-grid-2 mt-sp-8 items-start">
            {clientCases.map((caseStudy, index) => (
              <CaseCard
                key={caseStudy.id}
                caseStudy={caseStudy}
                withCover
                ctaLabel="Ver o case"
                priority={index === 0}
              />
            ))}
          </div>
        </div>
      </section>

      <section className="ds-section" aria-labelledby="cases-laboratorio">
        <div className="ds-section-shell">
          <h2 id="cases-laboratorio" className="ds-card-title !mt-0">
            Laboratório
          </h2>
          <p className="ds-copy max-w-[64ch]">
            Projetos pessoais e de estudo, feitos para praticar e testar ideias.
          </p>
          <div className="ds-grid-2 mt-sp-8 items-start">
            {labCases.map((caseStudy) => (
              <CaseCard
                key={caseStudy.id}
                caseStudy={caseStudy}
                withCover={false}
                ctaLabel="Ver o projeto"
              />
            ))}
          </div>
        </div>
      </section>

      <section className="ds-section ds-section-dark">
        <div className="ds-section-shell">
          <h2 className="ds-card-title !mt-0 text-white">
            Quer um projeto parecido com algum destes?
          </h2>
          <p className="ds-copy max-w-[60ch]">
            Conte o que você precisa. A conversa começa direto no WhatsApp, sem
            formulário.
          </p>
          <div className="mt-sp-6 flex flex-wrap items-center gap-sp-3">
            <WhatsAppLink
              service="um projeto parecido com os cases do portfólio"
              placement="cases_hub_footer"
              className={primaryButton}
            >
              Conversar sobre meu projeto
            </WhatsAppLink>
            <Link href="/servicos" className={secondaryButtonDark}>
              Ver os serviços
            </Link>
          </div>
        </div>
      </section>
    </main>
  );
}