import {
  sanitizeDownloadFilename,
  stableStringify,
} from "@add-ideas/toolbox-helpers";
import { strToU8, zipSync } from "fflate";
import type { RenderResult } from "./types";

export function createSvgZip(result: RenderResult): Blob {
  const files: Record<string, Uint8Array> = {};
  result.pages.forEach((svg, index) => {
    files[`label-sheet-${String(index + 1).padStart(3, "0")}.svg`] =
      strToU8(svg);
  });
  files["merge-report.json"] = strToU8(
    stableStringify(
      {
        application: "Label Tools 0.2.0",
        pages: result.totalPages,
        labels: result.totalLabels,
        warnings: result.warnings,
        boundary:
          "System fonts and printer scaling are not embedded or controlled; print a calibration sheet first.",
      },
      2,
    ),
  );
  const bytes = zipSync(files, {
    level: 6,
    mtime: new Date("1980-01-01T00:00:00.000Z"),
  });
  return new Blob([new Uint8Array(bytes).buffer], { type: "application/zip" });
}

export function svgFilename(index: number): string {
  return sanitizeDownloadFilename(
    `label-sheet-${String(index + 1).padStart(3, "0")}.svg`,
  );
}