/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

import { sep } from "node:path";
import { getLayerString } from "../desktop-format/get-layer-string.mjs";

const getFileName = file => {
  if (!file || file.destination.startsWith("dist/")) {
    return "the relevant *.tokens.json file";
  }

  // Windows file separators can end up mixed with forward slashes in these paths, so we check for them as well
  const cssFileName = file.destination.split("/").at(-1).split(sep).at(-1);
  return cssFileName.replace(".css", ".json");
};

export const customFileHeader = ({ surface, platform, file }) => {
  const licenseString = `/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */`;

  const commentString = `/* DO NOT EDIT this file directly, instead modify ${getFileName(file)}
 * and run \`mach buildtokens\` to see your changes. */`;

  const cssImport = surface
    ? `@import url("chrome://global/skin/design-system/tokens-shared.css");\n\n`
    : "";

  const layerString = !surface && !platform ? getLayerString() : "";

  return `${licenseString}

${commentString}

${cssImport}${layerString}`;
};