import type { H3Event } from 'h3'

interface LinkValue {
  value: string
}

export interface WishlistRow {
  id: number
  isbn: string | null
  thalia: string | null
  cover?: string | null
  books: LinkValue[]
  authors: LinkValue[]
  title: LinkValue[]
}

export function wishlistTable(event: H3Event): string {
  const { baserowWishlistTableId } = useRuntimeConfig(event)
  if (!baserowWishlistTableId) {
    throw createError({ statusCode: 500, statusMessage: 'NUXT_BASEROW_WISHLIST_TABLE_ID is not set' })
  }
  return baserowWishlistTableId
}

export const OPEN_LIBRARY_COVER = /^https:\/\/covers\.openlibrary\.org\/b\/id\/\d+-M\.jpg$/

function values(links: LinkValue[] | null | undefined): string[] {
  return (links ?? []).map(link => link.value?.trim()).filter((value): value is string => !!value)
}

export function toWishlistBook(row: WishlistRow): WishlistBook {
  const germanTitle = values(row.title).join(' / ')
  return {
    id: row.id,
    isbn: (row.isbn ?? '').trim(),
    thalia: row.thalia?.trim() || null,
    cover: row.cover?.trim() || null,
    title: germanTitle || values(row.books).join(' / '),
    authors: [...new Set(values(row.authors))]
  }
}