import type { Metadata } from 'next'
import { notFound } from 'next/navigation'
import { getManualChapter, getManualToc } from '@/lib/manual-server'
import { MarkdownView } from '../_components/markdown-view'

type Params = { slug?: string[] }

export async function generateStaticParams(): Promise<Params[]> {
  return getManualToc().map((entry) => ({
    slug: entry.slug.length > 0 ? [...entry.slug] : undefined,
  }))
}

export async function generateMetadata({
  params,
}: {
  params: Promise<Params>
}): Promise<Metadata> {
  const { slug = [] } = await params
  const chapter = getManualChapter(slug)
  if (!chapter) return { title: 'Manual — not found' }
  return {
    title: `${chapter.entry.title} — Scrum4Me Manual`,
    description: chapter.entry.description.slice(0, 200),
  }
}

export default async function ManualChapterPage({
  params,
}: {
  params: Promise<Params>
}) {
  const { slug = [] } = await params
  const chapter = getManualChapter(slug)
  if (!chapter) notFound()

  return (
    <div className="mx-auto w-full max-w-3xl px-6 py-8">
      <MarkdownView markdown={chapter.body} />
    </div>
  )
}