import fs from "fs";
import path from "path";

const IMAGES_ROOT = path.join(process.cwd(), "src/assets/images");
const IMAGE_EXT = /\.(jpe?g|png|webp|gif|avif|svg)$/i;

export type Slide = {
  id: string;
  image: string;
  href: string;
};

function listImages(subdir: string) {
  const dir = path.join(IMAGES_ROOT, subdir);
  if (!fs.existsSync(dir)) return [];

  return fs
    .readdirSync(dir)
    .filter((name) => IMAGE_EXT.test(name) && !name.startsWith("."))
    .sort((a, b) => a.localeCompare(b, undefined, { numeric: true }))
    .map((file) => `/assets/images/${subdir}/${encodeURIComponent(file)}`);
}

export function getSlides(): Slide[] {
  return listImages("slides").map((image, index) => ({
    id: `slide-${index + 1}`,
    image,
    href: "#",
  }));
}

export function getLogoSrc() {
  return listImages("logo")[0] ?? "/placeholders/logo.svg";
}