// src/lib/assetFolders.ts
// ─────────────────────────────────────────────────────────────────────────────
// Server-side helpers that ensure every asset bucket exists when an editor
// creates a new entity in HQ Command. Without this, the editor's first
// upload error-paths because the target subfolder doesn't exist yet.
//
// Each scope has a known set of "buckets" — the well-known subfolder layout
// the front-end expects (e.g. cases use videos/, renders/, gallery/). We
// pre-create them all so editors can drop files anywhere without needing
// to think about server-side folder structure.
// ─────────────────────────────────────────────────────────────────────────────

import "server-only";
import fs from "fs";
import path from "path";

export type AssetScope = "cases" | "applications" | "news" | "parts";

const SCOPE_ROOT: Record<AssetScope, string> = {
  cases: path.join(process.cwd(), "public", "cases"),
  applications: path.join(process.cwd(), "public", "applications"),
  news: path.join(process.cwd(), "public", "news"),
  parts: path.join(process.cwd(), "public", "parts"),
};

// Buckets per scope — the subfolders the front-end reads from.
// Adding a new bucket here is the only place in the codebase you need to
// touch to introduce a new asset type.
const SCOPE_BUCKETS: Record<AssetScope, string[]> = {
  cases: ["videos", "renders", "gallery", "datasheet", "models"],
  applications: ["videos", "renders", "gallery", "datasheet"],
  news: ["gallery"],
  parts: ["renders", "gallery"],
};

/**
 * Create the slug folder + every bucket subfolder if they don't exist.
 * Idempotent — safe to call on every entity create or edit.
 */
export function ensureAssetFolders(scope: AssetScope, slug: string): void {
  if (!slug) return;

  try {
    const safeSlug = slug.toLowerCase().replace(/[^a-z0-9_-]/g, "-").replace(/-+/g, "-").replace(/^-|-$/g, "");
    if (!safeSlug) return;

    const root = SCOPE_ROOT[scope];
    const baseDir = path.join(root, safeSlug);

    fs.mkdirSync(baseDir, { recursive: true });

    for (const bucket of SCOPE_BUCKETS[scope]) {
      fs.mkdirSync(path.join(baseDir, bucket), { recursive: true });
    }
  } catch (error) {
    console.error(`[assetFolders] Failed to ensure ${scope}/${slug}:`, error);
  }
}

/**
 * Convert a free-text title into the same slug the front-end uses.
 * Mirrors `nodeToSlug` in ApplicationClient.tsx so the folder name matches
 * the path the page renders for that node's assets.
 */
export function titleToSlug(title: string): string {
  return title
    .toLowerCase()
    .trim()
    .replace(/[^\w\s-]/g, "")
    .replace(/[\s_-]+/g, "-")
    .replace(/^-+|-+$/g, "");
}