// adapters/responses/dealDetail.adapter.js
const  {mapBreadcrumbToResponse}  =require( "./breadCrumb.adapter")

const formatDateAsString = (value) =>
  value instanceof Date ? value.toISOString() : value ?? null

const requiredIsoString = (value, fieldName) => {
  if (value instanceof Date) return value.toISOString()
  if (typeof value === "string" && value.length) return value
  throw new Error(`${fieldName} is missing (undefined/null)`)
}

function mapNoticeToResponse(notice) {
  if (!notice) return null
  return {
    id: notice.id,
    title: notice.title,
    dealId: notice.dealId,
    body: notice.body ?? null,
    severity: notice.severity,
    isActive: notice.isActive,
    createdBy: notice.createdBy,
    createdAt: requiredIsoString(notice.createdAt, "notice.createdAt"),
    updatedAt: requiredIsoString(notice.updatedAt, "notice.updatedAt"),
  }
}



// minimal similardeal -> response
function mapSimilarDealItem(d) {
  if (!d) return null
  return {
    id: d.id,
    title: d.title,
    price: d.price ?? null,
    score: Number.isFinite(d.score) ? d.score : 0,
    imageUrl: d.imageUrl || "",
    sellerName: d.sellerName || "Bilinmiyor",
    createdAt: formatDateAsString(d.createdAt), // SimilarDealSchema: nullable OK
    // url: d.url ?? null,
  }
}

function mapDealToDealDetailResponse(deal) {
  if (!deal) return null

  const firstNotice = Array.isArray(deal.notices) ? deal.notices[0] : null

  if (!deal.user) throw new Error("deal.user is missing (include user in query)")

  return {
    id: deal.id,
    title: deal.title,
    description: deal.description || "",
    url: deal.url ?? null,
    price: deal.price ?? null,
    score: Number.isFinite(deal.score) ? deal.score : 0,

    commentsCount: deal._count?.comments ?? 0,

    status: deal.status,
    saleType: deal.saletype, // ✅ FIX: saletype değil
    affiliateType: deal.affiliateType,

    createdAt: requiredIsoString(deal.createdAt, "deal.createdAt"),
    updatedAt: requiredIsoString(deal.updatedAt, "deal.updatedAt"),

    user: {
      id: deal.user.id,
      username: deal.user.username,
      avatarUrl: deal.user.avatarUrl ?? null,
    },

    // ✅ FIX: SellerSummarySchema genelde id ister -> custom seller için -1
    seller: deal.seller
      ? {
          id: deal.seller.id,
          name: deal.seller.name,
          url: deal.seller.url ?? null,
        }
      : {
          id: -1,
          name: deal.customSeller || "Bilinmiyor",
          url: null,
        },

    images: (deal.images || []).map((img) => ({
      id: img.id,
      imageUrl: img.imageUrl,
      order: img.order,
    })),

    comments: (deal.comments || []).map((comment) => {
      if (!comment.user)
        throw new Error("comment.user is missing (include comments.user in query)")

      return {
        id: comment.id,
        text: comment.text,
        createdAt: requiredIsoString(comment.createdAt, "comment.createdAt"),
        user: {
          id: comment.user.id,
          username: comment.user.username,
          avatarUrl: comment.user.avatarUrl ?? null,
        },
      }
    }),

    breadcrumb: mapBreadcrumbToResponse(deal.breadcrumb),

    notice: mapNoticeToResponse(firstNotice),

    similarDeals: Array.isArray(deal.similarDeals)
      ? deal.similarDeals.map(mapSimilarDealItem).filter(Boolean)
      : [],
  }
}

module.exports = {
  mapDealToDealDetailResponse,
}