portfolio/app/[locale]/projects/[slug]/page.tsx

import { prisma } from "@/lib/prisma";
import ProjectDetailClient from "@/app/_ui/ProjectDetailClient";
import { notFound } from "next/navigation";
import type { Metadata } from "next";
import { getLanguageAlternates, toAbsoluteUrl } from "@/lib/seo";

export const revalidate = 300;

export async function generateMetadata({
  params,
}: {
  params: Promise<{ locale: string; slug: string }>;
}): Promise<Metadata> {
  const { locale, slug } = await params;
  const languages = getLanguageAlternates({ pathWithoutLocale: `projects/${slug}` });
  return {
    alternates: {
      canonical: toAbsoluteUrl(`/${locale}/projects/${slug}`),
      languages,
    },
  };
}

export default async function ProjectPage({
  params,
}: {
  params: Promise<{ locale: string; slug: string }>;
}) {
  const { locale, slug } = await params;

  const project = await prisma.project.findFirst({
    where: { slug, published: true },
    include: {
      translations: {
        select: { title: true, description: true, content: true, locale: true },
      },
    },
  });

  if (!project) return notFound();

  const trPreferred = project.translations?.find((t) => t.locale === locale && (t?.title || t?.description));
  const trDefault = project.translations?.find(
    (t) => t.locale === project.defaultLocale && (t?.title || t?.description),
  );
  const tr = trPreferred ?? trDefault;
  const { translations: _translations, ...rest } = project;
  const localizedContent = (() => {
    if (typeof tr?.content === "string") return tr.content;
    if (tr?.content && typeof tr.content === "object" && "markdown" in tr.content) {
      const markdown = (tr.content as Record<string, unknown>).markdown;
      if (typeof markdown === "string") return markdown;
    }
    return project.content;
  })();
  const localized = {
    ...rest,
    title: tr?.title ?? project.title,
    description: tr?.description ?? project.description,
    content: localizedContent,
  };

  const jsonLd = {
    "@context": "https://schema.org",
    "@type": "SoftwareSourceCode",
    "name": localized.title,
    "description": localized.description,
    "codeRepository": localized.github,
    "programmingLanguage": localized.technologies,
    "author": {
      "@type": "Person",
      "name": "Dennis Konkol"
    },
    "dateCreated": project.date,
    "url": toAbsoluteUrl(`/${locale}/projects/${slug}`),
    "image": localized.imageUrl ? toAbsoluteUrl(localized.imageUrl) : undefined,
  };

  return (
    <>
      <script
        type="application/ld+json"
        dangerouslySetInnerHTML={{ __html: JSON.stringify(jsonLd) }}
      />
      <ProjectDetailClient project={localized} locale={locale} />
    </>
  );
}