import { createAutoClient, type RenderClient } from "../pdf/render/client";
import type { UserFace } from "../pdf/fonts/userFontStore";
import { api } from "./api";

let client: RenderClient | null = null;
let lastId = 0;

/** The one render client (and so one worker) shared by the preview and export. */
export function getRenderClient(): RenderClient {
  client ??= createAutoClient({
    // Font metadata comes from the database row, the bytes over the binary IPC; both by the file's sha256.
    loadUserFont: async (sha256) => {
      const rows = await api.listUserFonts(true);
      const row = rows.find((r) => r.sha256 === sha256);
      if (!row) throw new Error("An imported font used by this invoice is no longer in the font library");
      const bytes = await api.getUserFontBytes(sha256);
      return { face: row.face as UserFace, weight: row.weight, italic: row.style === "italic", sha256, bytes };
    },
  });
  return client;
}

export const nextRenderJobId = (): number => ++lastId;