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/**
 * @license
 * Copyright 2023 Google Inc.
 * SPDX-License-Identifier: Apache-2.0
 */

import path from 'node:path';

import {getText} from '../httpUtil.js';

import {BrowserPlatform} from './types.js';

function archive(platform: BrowserPlatform, buildId: string): string {
  switch (platform) {
    case BrowserPlatform.LINUX_ARM:
    case BrowserPlatform.LINUX:
      return 'chrome-linux';
    case BrowserPlatform.MAC_ARM:
    case BrowserPlatform.MAC:
      return 'chrome-mac';
    case BrowserPlatform.WIN32:
    case BrowserPlatform.WIN64:
      // Windows archive name changed at r591479.
      return parseInt(buildId, 10) > 591479 ? 'chrome-win' : 'chrome-win32';
  }
}

function folder(platform: BrowserPlatform): string {
  switch (platform) {
    case BrowserPlatform.LINUX_ARM:
    case BrowserPlatform.LINUX:
      return 'Linux_x64';
    case BrowserPlatform.MAC_ARM:
      return 'Mac_Arm';
    case BrowserPlatform.MAC:
      return 'Mac';
    case BrowserPlatform.WIN32:
      return 'Win';
    case BrowserPlatform.WIN64:
      return 'Win_x64';
  }
}

export function resolveDownloadUrl(
  platform: BrowserPlatform,
  buildId: string,
  baseUrl = 'https://storage.googleapis.com/chromium-browser-snapshots',
): string {
  return `${baseUrl}/${resolveDownloadPath(platform, buildId).join('/')}`;
}

export function resolveDownloadPath(
  platform: BrowserPlatform,
  buildId: string,
): string[] {
  return [folder(platform), buildId, `${archive(platform, buildId)}.zip`];
}

export function relativeExecutablePath(
  platform: BrowserPlatform,
  _buildId: string,
): string {
  switch (platform) {
    case BrowserPlatform.MAC:
    case BrowserPlatform.MAC_ARM:
      return path.join(
        'chrome-mac',
        'Chromium.app',
        'Contents',
        'MacOS',
        'Chromium',
      );
    case BrowserPlatform.LINUX_ARM:
    case BrowserPlatform.LINUX:
      return path.join('chrome-linux', 'chrome');
    case BrowserPlatform.WIN32:
    case BrowserPlatform.WIN64:
      return path.join('chrome-win', 'chrome.exe');
  }
}
export async function resolveBuildId(
  platform: BrowserPlatform,
): Promise<string> {
  return await getText(
    new URL(
      `https://storage.googleapis.com/chromium-browser-snapshots/${folder(
        platform,
      )}/LAST_CHANGE`,
    ),
  );
}

export function compareVersions(a: string, b: string): number {
  return Number(a) - Number(b);
}