import type {
  MeshkeeBlog,
  MeshkeeMediaItem,
  MeshkeePortfolio,
  MeshkeeProduct,
} from "@/services/meshkee-content";

export function toPlainText(value: string) {
  if (!value.includes("<")) return value;
  return value
    .replace(/<br\s*\/?>/gi, "\n")
    .replace(/<\/p>/gi, "\n")
    .replace(/<[^>]+>/g, "")
    .replace(/&nbsp;/g, " ")
    .replace(/&amp;/g, "&")
    .replace(/&lt;/g, "<")
    .replace(/&gt;/g, ">")
    .replace(/\n{3,}/g, "\n\n")
    .trim();
}

export function excerpt(value: string, max = 160) {
  const plain = toPlainText(value).replace(/\s+/g, " ").trim();
  if (plain.length <= max) return plain;
  return `${plain.slice(0, max - 1).trimEnd()}…`;
}

export function formatDate(value?: string) {
  if (!value) return "";
  const date = new Date(value);
  if (Number.isNaN(date.getTime())) return "";
  return date.toLocaleDateString("en-US", {
    month: "long",
    day: "numeric",
    year: "numeric",
  });
}

export function productImage(product: MeshkeeProduct) {
  return product.thumbnailUrl || product.thumbnail || product.image || "";
}

export function productSubtitle(product: MeshkeeProduct) {
  const raw = product.categoryName?.trim() ?? "";
  if (!raw) return "";
  if (raw.toLowerCase() === product.title.trim().toLowerCase()) return "";
  return raw;
}

export function blogImage(post: MeshkeeBlog) {
  return post.titleImageUrl || "";
}

export function portfolioImage(item: MeshkeePortfolio) {
  return item.titleImageUrl || item.coverUrl || item.image || "";
}

export function galleryImage(item: MeshkeeMediaItem) {
  return item.publicUrl || "";
}

export function portfolioTitleEn(item: MeshkeePortfolio) {
  return (
    item.titleEn?.trim() ||
    item.nameEn?.trim() ||
    item.title?.trim() ||
    item.name?.trim() ||
    ""
  );
}

export function portfolioTitleFa(item: MeshkeePortfolio) {
  return item.titleFa?.trim() || item.nameFa?.trim() || "";
}

export function portfolioTitle(item: MeshkeePortfolio) {
  const candidates = [
    item.titleEn,
    item.titleFa,
    item.title,
    item.nameEn,
    item.nameFa,
    item.name,
  ];
  for (const value of candidates) {
    const text = value?.trim();
    if (text) return text;
  }
  const slug = item.slug?.trim();
  if (slug) {
    return slug
      .replace(/[-_]+/g, " ")
      .replace(/\s+/g, " ")
      .trim()
      .replace(/\b\w/g, (char) => char.toUpperCase());
  }
  return "Untitled portfolio";
}

export function buildPageItems(
  page: number,
  pageCount: number,
): (number | "…")[] {
  if (pageCount <= 7) {
    return Array.from({ length: pageCount }, (_, i) => i + 1);
  }

  const items: (number | "…")[] = [1];
  const start = Math.max(2, page - 1);
  const end = Math.min(pageCount - 1, page + 1);

  if (start > 2) items.push("…");
  for (let n = start; n <= end; n += 1) items.push(n);
  if (end < pageCount - 1) items.push("…");
  items.push(pageCount);
  return items;
}

export const PRODUCT_PAGE_SIZE = 12;
export const BLOG_PAGE_SIZE = 9;
export const GALLERY_PAGE_SIZE = 16;
export const PORTFOLIO_PAGE_SIZE = 12;
export const CONTENT_PAGE_SIZE = 12;