'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var utils = require('../shared/utils.js');

function getInternalTemplate(pathnames, pathname, locale) {
  const sortedPathnames = utils.getSortedPathnames(Object.keys(pathnames));

  // Try to find a localized pathname that matches
  for (const internalPathname of sortedPathnames) {
    const localizedPathnamesOrPathname = pathnames[internalPathname];
    if (typeof localizedPathnamesOrPathname === 'string') {
      const localizedPathname = localizedPathnamesOrPathname;
      if (utils.matchesPathname(localizedPathname, pathname)) {
        return [undefined, internalPathname];
      }
    } else {
      // Prefer the entry with the current locale in case multiple
      // localized pathnames match the current pathname
      const sortedEntries = Object.entries(localizedPathnamesOrPathname);
      const curLocaleIndex = sortedEntries.findIndex(_ref => {
        let [entryLocale] = _ref;
        return entryLocale === locale;
      });
      if (curLocaleIndex > 0) {
        sortedEntries.unshift(sortedEntries.splice(curLocaleIndex, 1)[0]);
      }
      for (const [entryLocale, entryPathname] of sortedEntries) {
        if (utils.matchesPathname(entryPathname, pathname)) {
          return [entryLocale, internalPathname];
        }
      }
    }
  }

  // Try to find an internal pathname that matches (this can be the case
  // if all localized pathnames are different from the internal pathnames)
  for (const internalPathname of Object.keys(pathnames)) {
    if (utils.matchesPathname(internalPathname, pathname)) {
      return [undefined, internalPathname];
    }
  }

  // No match
  return [undefined, undefined];
}
function formatTemplatePathname(sourcePathname, sourceTemplate, targetTemplate, prefix) {
  const params = getRouteParams(sourceTemplate, sourcePathname);
  let targetPathname = '';
  targetPathname += formatPathnameTemplate(targetTemplate, params);

  // A pathname with an optional catchall like `/categories/[[...slug]]`
  // should be normalized to `/categories` if the catchall is not present
  // and no trailing slash is configured
  targetPathname = utils.normalizeTrailingSlash(targetPathname);
  return targetPathname;
}

/**
 * Removes potential prefixes from the pathname.
 */
function getNormalizedPathname(pathname, locales, localePrefix) {
  // Add trailing slash for consistent handling
  // both for the root as well as nested paths
  if (!pathname.endsWith('/')) {
    pathname += '/';
  }
  const localePrefixes = getLocalePrefixes(locales, localePrefix);
  const regex = new RegExp("^(".concat(localePrefixes.map(_ref2 => {
    let [, prefix] = _ref2;
    return prefix.replaceAll('/', '\\/');
  }).join('|'), ")/(.*)"), 'i');
  const match = pathname.match(regex);
  let result = match ? '/' + match[2] : pathname;
  if (result !== '/') {
    result = utils.normalizeTrailingSlash(result);
  }
  return result;
}
function getLocalePrefixes(locales, localePrefix) {
  let sort = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
  const prefixes = locales.map(locale => [locale, utils.getLocalePrefix(locale, localePrefix)]);
  if (sort) {
    // More specific ones first
    prefixes.sort((a, b) => b[1].length - a[1].length);
  }
  return prefixes;
}
function getPathnameMatch(pathname, locales, localePrefix) {
  const localePrefixes = getLocalePrefixes(locales, localePrefix);
  for (const [locale, prefix] of localePrefixes) {
    let exact, matches;
    if (pathname === prefix || pathname.startsWith(prefix + '/')) {
      exact = matches = true;
    } else {
      const normalizedPathname = pathname.toLowerCase();
      const normalizedPrefix = prefix.toLowerCase();
      if (normalizedPathname === normalizedPrefix || normalizedPathname.startsWith(normalizedPrefix + '/')) {
        exact = false;
        matches = true;
      }
    }
    if (matches) {
      return {
        locale,
        prefix,
        matchedPrefix: pathname.slice(0, prefix.length),
        exact
      };
    }
  }
}
function getRouteParams(template, pathname) {
  const normalizedPathname = utils.normalizeTrailingSlash(pathname);
  const normalizedTemplate = utils.normalizeTrailingSlash(template);
  const regex = utils.templateToRegex(normalizedTemplate);
  const match = regex.exec(normalizedPathname);
  if (!match) return undefined;
  const params = {};
  for (let i = 1; i < match.length; i++) {
    var _normalizedTemplate$m;
    const key = (_normalizedTemplate$m = normalizedTemplate.match(/\[([^\]]+)\]/g)) === null || _normalizedTemplate$m === void 0 ? void 0 : _normalizedTemplate$m[i - 1].replace(/[[\]]/g, '');
    if (key) params[key] = match[i];
  }
  return params;
}
function formatPathnameTemplate(template, params) {
  if (!params) return template;

  // Simplify syntax for optional catchall ('[[...slug]]') so
  // we can replace the value with simple interpolation
  template = template.replace(/\[\[/g, '[').replace(/\]\]/g, ']');
  let result = template;
  Object.entries(params).forEach(_ref3 => {
    let [key, value] = _ref3;
    result = result.replace("[".concat(key, "]"), value);
  });
  return result;
}
function formatPathname(pathname, prefix, search) {
  let result = pathname;
  if (prefix) {
    result = utils.prefixPathname(prefix, result);
  }
  if (search) {
    result += search;
  }
  return result;
}
function getHost(requestHeaders) {
  var _ref4, _requestHeaders$get;
  return (_ref4 = (_requestHeaders$get = requestHeaders.get('x-forwarded-host')) !== null && _requestHeaders$get !== void 0 ? _requestHeaders$get : requestHeaders.get('host')) !== null && _ref4 !== void 0 ? _ref4 : undefined;
}
function isLocaleSupportedOnDomain(locale, domain) {
  return domain.defaultLocale === locale || !domain.locales || domain.locales.includes(locale);
}
function getBestMatchingDomain(curHostDomain, locale, domainsConfig) {
  let domainConfig;

  // Prio 1: Stay on current domain
  if (curHostDomain && isLocaleSupportedOnDomain(locale, curHostDomain)) {
    domainConfig = curHostDomain;
  }

  // Prio 2: Use alternative domain with matching default locale
  if (!domainConfig) {
    domainConfig = domainsConfig.find(cur => cur.defaultLocale === locale);
  }

  // Prio 3: Use alternative domain with restricted matching locale
  if (!domainConfig) {
    domainConfig = domainsConfig.find(cur => {
      var _cur$locales;
      return (_cur$locales = cur.locales) === null || _cur$locales === void 0 ? void 0 : _cur$locales.includes(locale);
    });
  }

  // Prio 4: Stay on the current domain if it supports all locales
  if (!domainConfig && (curHostDomain === null || curHostDomain === void 0 ? void 0 : curHostDomain.locales) == null) {
    domainConfig = curHostDomain;
  }

  // Prio 5: Use alternative domain that supports all locales
  if (!domainConfig) {
    domainConfig = domainsConfig.find(cur => !cur.locales);
  }
  return domainConfig;
}
function applyBasePath(pathname, basePath) {
  return utils.normalizeTrailingSlash(basePath + pathname);
}
function getLocaleAsPrefix(locale) {
  return "/".concat(locale);
}
function sanitizePathname(pathname) {
  // Sanitize malicious URIs, e.g.:
  // '/en/\\example.org → /en/%5C%5Cexample.org'
  // '/en////example.org → /en/example.org'
  return pathname.replace(/\\/g, '%5C').replace(/\/+/g, '/');
}

exports.applyBasePath = applyBasePath;
exports.formatPathname = formatPathname;
exports.formatPathnameTemplate = formatPathnameTemplate;
exports.formatTemplatePathname = formatTemplatePathname;
exports.getBestMatchingDomain = getBestMatchingDomain;
exports.getHost = getHost;
exports.getInternalTemplate = getInternalTemplate;
exports.getLocaleAsPrefix = getLocaleAsPrefix;
exports.getLocalePrefixes = getLocalePrefixes;
exports.getNormalizedPathname = getNormalizedPathname;
exports.getPathnameMatch = getPathnameMatch;
exports.getRouteParams = getRouteParams;
exports.isLocaleSupportedOnDomain = isLocaleSupportedOnDomain;
exports.sanitizePathname = sanitizePathname;