import { writeFile } from 'node:fs/promises'
import { join } from 'node:path'

export default defineEventHandler(async (event) => {
  const slug = getRouterParam(event, 'slug')

  if (!slug || !/^[a-z0-9-]+$/.test(slug)) {
    throw createError({ statusCode: 400, statusMessage: 'Invalid slug' })
  }

  const body = await readBody<{ frontmatter: string; body: string }>(event)

  if (!body?.frontmatter && !body?.body) {
    throw createError({ statusCode: 400, statusMessage: 'Missing content' })
  }

  const filePath = join(process.cwd(), 'content', 'book', `${slug}.md`)
  const content = `---\n${body.frontmatter.trim()}\n---\n${body.body}`

  await writeFile(filePath, content, 'utf-8')

  return { ok: true }
})