// src/lib/emdash.ts — server-side CMS fetch helpers (do not import on client)
const EMDASH_URL = process.env.EMDASH_URL || 'http://localhost:4321'
const EMDASH_TOKEN = process.env.EMDASH_API_TOKEN || ''

export interface CmsItem {
  id: string
  slug: string
  status: string
  data: Record<string, unknown>
  publishedAt: string | null
}

// emDash stores image fields as { provider, id, src } — flatten to plain URL strings.
function normalizeData(data: Record<string, unknown>): Record<string, unknown> {
  const out: Record<string, unknown> = {}
  for (const [k, v] of Object.entries(data)) {
    out[k] = v && typeof v === 'object' && 'src' in v ? (v as { src: unknown }).src ?? v : v
  }
  return out
}

async function fetchCollection(collection: string, limit = 20): Promise<CmsItem[]> {
  if (!EMDASH_TOKEN) return []
  try {
    const url = new URL(`/_emdash/api/content/${collection}`, EMDASH_URL)
    url.searchParams.set('status', 'published')
    url.searchParams.set('limit', String(limit))
    const res = await fetch(url.toString(), {
      headers: { Authorization: `Bearer ${EMDASH_TOKEN}` },
      next: { revalidate: 60 },
    })
    if (!res.ok) return []
    const json = await res.json() as { data?: { items?: CmsItem[] }; items?: CmsItem[] }
    const items = json.data?.items ?? json.items ?? []
    return items.map((item) => ({ ...item, data: normalizeData(item.data ?? {}) }))
  } catch {
    return []
  }
}

export const getCampaigns     = () => fetchCollection('campaigns')
export const getSpecials      = () => fetchCollection('specials')
export const getBusinessHours = () => fetchCollection('business_hours', 1)
export const getPromotions    = () => fetchCollection('promotions')
export const getFeaturedProductIds = async (): Promise<string[]> => {
  const items = await fetchCollection('featured_products', 10)
  return items.flatMap(i => {
    const ids = i.data.product_ids
    return Array.isArray(ids) ? ids as string[] : []
  })
}
export const getBlogPosts = (limit = 10) => fetchCollection('posts', limit)