"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = getLatestRelease;
function _semver() {
  const data = _interopRequireDefault(require("semver"));
  _semver = function () {
    return data;
  };
  return data;
}
var _releaseCacheManager = _interopRequireDefault(require("./releaseCacheManager"));
var _fetch = require("../fetch");
var _logger = _interopRequireDefault(require("../logger"));
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
 * Checks via GitHub API if there is a newer stable React Native release and,
 * if it exists, returns the release data.
 *
 * If the latest release is not newer or if it's a prerelease, the function
 * will return undefined.
 */
async function getLatestRelease(name, currentVersion) {
  _logger.default.debug('Checking for a newer version of React Native');
  try {
    _logger.default.debug(`Current version: ${currentVersion}`);

    // if the version is a 1000.0.0 version or 0.0.0, we want to bail
    // since they are nightlies or unreleased versions
    if (currentVersion.includes('1000.0.0') || currentVersion.includes('0.0.0')) {
      return;
    }
    const cachedLatest = _releaseCacheManager.default.get(name, 'latestVersion');
    if (cachedLatest) {
      _logger.default.debug(`Cached release version: ${cachedLatest}`);
    }
    const aWeek = 7 * 24 * 60 * 60 * 1000;
    const lastChecked = _releaseCacheManager.default.get(name, 'lastChecked');
    const now = new Date();
    if (lastChecked && Number(now) - Number(new Date(lastChecked)) < aWeek) {
      _logger.default.debug('Cached release is still recent, skipping remote check');
      return;
    }
    _logger.default.debug('Checking for newer releases on GitHub');
    const eTag = _releaseCacheManager.default.get(name, 'eTag');
    const latestVersion = await getLatestRnDiffPurgeVersion(name, eTag);
    _logger.default.debug(`Latest release: ${latestVersion}`);
    if (_semver().default.compare(latestVersion, currentVersion) === 1 && !_semver().default.prerelease(latestVersion)) {
      return {
        version: latestVersion,
        changelogUrl: buildChangelogUrl(latestVersion),
        diffUrl: buildDiffUrl(currentVersion)
      };
    }
  } catch (e) {
    _logger.default.debug('Something went wrong with remote version checking, moving on');
    _logger.default.debug(e);
  }
  return undefined;
}
function buildChangelogUrl(version) {
  return `https://github.com/facebook/react-native/releases/tag/v${version}`;
}
function buildDiffUrl(version) {
  return `https://react-native-community.github.io/upgrade-helper/?from=${version}`;
}

/**
 * Returns the most recent React Native version available to upgrade to.
 */
async function getLatestRnDiffPurgeVersion(name, eTag) {
  const options = {
    // https://developer.github.com/v3/#user-agent-required
    headers: {
      'User-Agent': 'React-Native-CLI'
    }
  };
  if (eTag) {
    options.headers['If-None-Match'] = eTag;
  }
  const {
    data,
    status,
    headers
  } = await (0, _fetch.fetch)('https://api.github.com/repos/react-native-community/rn-diff-purge/tags', options);

  // Remote is newer.
  if (status === 200) {
    const body = data;
    const latestVersion = body[0].name.substring(8);
    const eTagHeader = headers.get('eTag');

    // Update cache only if newer release is stable.
    if (!_semver().default.prerelease(latestVersion) && eTagHeader) {
      _logger.default.debug(`Saving ${eTagHeader} to cache`);
      _releaseCacheManager.default.set(name, 'eTag', eTagHeader);
      _releaseCacheManager.default.set(name, 'latestVersion', latestVersion);
    }
    return latestVersion;
  }

  // Cache is still valid.
  if (status === 304) {
    const latestVersion = _releaseCacheManager.default.get(name, 'latestVersion');
    if (latestVersion) {
      return latestVersion;
    }
  }

  // Should be returned only if something went wrong.
  return '0.0.0';
}

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