import { REPORTS_ROOT } from "../paths";
import { SONG_KIND } from "./song.mjs";
import { ScaffoldError, scaffoldSong } from "./scaffold-song";
import { scaffoldReportVideo } from "./scaffold.mjs";
import { kindById } from "./kinds.mjs";
import { invalidateProjects } from "../projects";

export { ScaffoldError };

export type NewProjectBody = {
  kind?: string;
  slug?: string;
  title?: string | null;
  from?: string | null;
  siteOrigin?: string | null;
  seed?: string | null;
  brand?: string | null;
};

/**
 * The one place a "new project" request is dispatched by kind. Here rather
 * than in the route, so the route never learns what a kind is.
 */
export async function scaffoldProject(body: NewProjectBody): Promise<{ href: string; [k: string]: unknown }> {
  const kind = String(body.kind ?? "");
  const k = kindById(kind);
  if (!k) throw new ScaffoldError(`unknown kind "${kind}"`);
  if (!k.scaffold) throw new ScaffoldError(`a ${k.label} is not scaffolded here`);
  const slug = String(body.slug ?? "").trim().toLowerCase();

  let result: { href: string; [k: string]: unknown };
  if (kind === SONG_KIND) {
    result = await scaffoldSong({ slug, title: body.title });
  } else {
    try {
      const r = await scaffoldReportVideo({
        root: REPORTS_ROOT,
        slug,
        title: body.title ?? undefined,
        from: body.from || null,
        siteOrigin: body.siteOrigin || null,
        seed: body.seed || null,
        brand: body.brand || null,
      });
      result = { ...r, href: `/browse/${r.id}` };
    } catch (e) {
      const msg = e instanceof Error ? e.message : String(e);
      throw new ScaffoldError(msg, /already exists/.test(msg) ? 409 : 400);
    }
  }
  invalidateProjects();
  return result;
}