tldraw/apps/docs/app/(content)/[...id]/page.tsx

import { ArticleDocsPage } from '@/components/ArticleDocsPage'
import { ArticleReferenceDocsPage } from '@/components/ArticleReferenceDocsPage'
import { CategoryDocsPage } from '@/components/CategoryDocsPage'
import { ExampleDocsPage } from '@/components/ExampleDocsPage'
import { SectionDocsPage } from '@/components/SectionDocsPage'
import { Article, Category, Section } from '@/types/content-types'
import { getDb } from '@/utils/ContentDatabase'
import { Metadata } from 'next'
import { notFound } from 'next/navigation'

async function getContentForPath(
	path: string
): Promise<
	| { type: 'section'; section: Section }
	| { type: 'category'; category: Category }
	| { type: 'article'; article: Article }
> {
	const db = await getDb()

	const section = await db.db.get(`SELECT * FROM sections WHERE sections.path = ?`, path)
	if (section) return { type: 'section', section } as const

	const category = await db.db.get(`SELECT * FROM categories WHERE categories.path = ?`, path)
	if (category) return { type: 'category', category } as const

	const article = await db.db.get(`SELECT * FROM articles WHERE articles.path = ?`, path)
	if (article) return { type: 'article', article } as const

	throw notFound()
}

export async function generateMetadata({ params }: { params: { id: string | string[] } }) {
	const path = typeof params.id === 'string' ? [params.id] : params.id
	const pathString = '/' + path.join('/')
	const content = await getContentForPath(pathString)

	if (!content) return {}

	let title: string | undefined
	let description: string | undefined
	let hero: string | undefined

	switch (content.type) {
		case 'section': {
			const { section } = content
			title = section.title
			description = section.description ?? undefined
			hero = section.hero ?? undefined
			break
		}
		case 'category': {
			const { category } = content
			title = category.title
			description = category.description ?? undefined
			hero = category.hero ?? undefined
			break
		}
		case 'article': {
			const { article } = content
			title = article.title
			description = article.description ?? undefined
			hero = article.hero ?? undefined
			break
		}
	}

	const metadata: Metadata = {
		title,
		description: description,
		openGraph: {
			title: title,
			description: description,
			images: hero,
		},
		twitter: {
			description: description,
			images: hero,
		},
	}

	return metadata
}

export async function generateStaticParams() {
	const db = await getDb()

	const sections = await db.db.all(`SELECT * FROM sections`)
	const categories = await db.db.all(`SELECT * FROM categories`)
	const articles = await db.db.all(`SELECT * FROM articles`)

	const paths = [] as string[]

	for (const section of sections) {
		paths.push(section.path)
	}

	for (const category of categories) {
		paths.push(category.path)
	}

	for (const article of articles) {
		paths.push(article.path)
	}

	return paths.map((path) => ({ params: { id: path.split('/').filter((p) => p) } }))
}

export default async function ContentPage({ params }: { params: { id: string | string[] } }) {
	const path = typeof params.id === 'string' ? [params.id] : params.id
	const pathString = '/' + path.join('/')
	const content = await getContentForPath(pathString)
	if (!content) throw notFound()

	switch (content.type) {
		case 'section': {
			const db = await getDb()
			let firstArticleInSection: Article | undefined

			const categories = await db.getCategoriesForSection(content.section.id)

			for (const category of categories) {
				const articles = await db.getCategoryArticles(content.section.id, category.id)
				const article = articles[0]
				if (article) {
					firstArticleInSection = article
					break
				}
			}

			if (firstArticleInSection) {
				const article = await db.getArticle(firstArticleInSection.id)
				if (article?.componentCode) {
					return <ExampleDocsPage article={article} />
				}
				return <ArticleDocsPage article={article} />
			}

			return <SectionDocsPage section={content.section} />
		}
		case 'category': {
			return <CategoryDocsPage category={content.category} />
		}
		case 'article': {
			if (content.article.componentCode) {
				return <ExampleDocsPage article={content.article} />
			}

			if (content.article.sectionId === 'reference') {
				return <ArticleReferenceDocsPage article={content.article} />
			}

			return <ArticleDocsPage article={content.article} />
		}
		default: {
			throw notFound()
		}
	}
}