/*
 * Copyright 2017 Google
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#import "FIRAuthErrorUtils.h"

#import "FIRAuthCredential.h"
#import "FIRAuthInternalErrors.h"

NS_ASSUME_NONNULL_BEGIN

NSString *const FIRAuthErrorDomain = @"FIRAuthErrorDomain";

NSString *const FIRAuthInternalErrorDomain = @"FIRAuthInternalErrorDomain";

NSString *const FIRAuthErrorUserInfoDeserializedResponseKey =
    @"FIRAuthErrorUserInfoDeserializedResponseKey";

NSString *const FIRAuthErrorUserInfoDataKey = @"FIRAuthErrorUserInfoDataKey";

NSString *const FIRAuthErrorUserInfoEmailKey = @"FIRAuthErrorUserInfoEmailKey";

NSString *const FIRAuthErrorNameKey = @"error_name";

NSString *const FIRAuthUpdatedCredentialKey = @"FIRAuthUpdatedCredentialKey";

/** @var kServerErrorDetailMarker
    @brief This marker indicates that the server error message contains a detail error message which
        should be used instead of the hardcoded client error message.
 */
static NSString *const kServerErrorDetailMarker = @" : ";

#pragma mark - URL response error codes

/** @var kURLResponseErrorCodeInvalidClientID
    @brief Error code that indicates that the client ID provided was invalid.
 */
static NSString *const kURLResponseErrorCodeInvalidClientID = @"auth/invalid-oauth-client-id";

/** @var kURLResponseErrorCodeNetworkRequestFailed
    @brief Error code that indicates that a network request within the SFSafariViewController or
        UIWebView failed.
 */
static NSString *const kURLResponseErrorCodeNetworkRequestFailed = @"auth/network-request-failed";

/** @var kURLResponseErrorCodeInternalError
    @brief Error code that indicates that an internal error occured within the
        SFSafariViewController or UIWebView failed.
 */
static NSString *const kURLResponseErrorCodeInternalError = @"auth/internal-error";

#pragma mark - Standard Error Messages

/** @var kFIRAuthErrorMessageInvalidCustomToken
    @brief Message for @c FIRAuthErrorCodeInvalidCustomToken error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidCustomToken = @"The custom token format is "
    "incorrect. Please check the documentation.";

/** @var kFIRAuthErrorMessageCustomTokenMismatch
    @brief Message for @c FIRAuthErrorCodeCustomTokenMismatch error code.
 */
static NSString *const kFIRAuthErrorMessageCustomTokenMismatch = @"The custom token corresponds to "
    "a different audience.";

/** @var kFIRAuthErrorMessageInvalidEmail
    @brief Message for @c FIRAuthErrorCodeInvalidEmail error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidEmail = @"The email address is badly formatted.";

/** @var kFIRAuthErrorMessageInvalidCredential
    @brief Message for @c FIRAuthErrorCodeInvalidCredential error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidCredential = @"The supplied auth credential is "
    "malformed or has expired.";

/** @var kFIRAuthErrorMessageUserDisabled
    @brief Message for @c FIRAuthErrorCodeUserDisabled error code.
 */
static NSString *const kFIRAuthErrorMessageUserDisabled = @"The user account has been disabled by "
    "an administrator.";

/** @var kFIRAuthErrorMessageEmailAlreadyInUse
    @brief Message for @c FIRAuthErrorCodeEmailAlreadyInUse error code.
 */
static NSString *const kFIRAuthErrorMessageEmailAlreadyInUse = @"The email address is already in "
    "use by another account.";

/** @var kFIRAuthErrorMessageWrongPassword
    @brief Message for @c FIRAuthErrorCodeWrongPassword error code.
 */
static NSString *const kFIRAuthErrorMessageWrongPassword = @"The password is invalid or the user "
    "does not have a password.";

/** @var kFIRAuthErrorMessageTooManyRequests
    @brief Message for @c FIRAuthErrorCodeTooManyRequests error code.
 */
static NSString *const kFIRAuthErrorMessageTooManyRequests = @"We have blocked all requests from "
    "this device due to unusual activity. Try again later.";

/** @var kFIRAuthErrorMessageAccountExistsWithDifferentCredential
    @brief Message for @c FIRAuthErrorCodeAccountExistsWithDifferentCredential error code.
 */
static NSString *const kFIRAuthErrorMessageAccountExistsWithDifferentCredential = @"An account "
    "already exists with the same email address but different sign-in credentials. Sign in using a "
    "provider associated with this email address.";

/** @var kFIRAuthErrorMessageRequiresRecentLogin
    @brief Message for @c FIRAuthErrorCodeRequiresRecentLogin error code.
 */
static NSString *const kFIRAuthErrorMessageRequiresRecentLogin= @"This operation is sensitive and "
    "requires recent authentication. Log in again before retrying this request.";

/** @var kFIRAuthErrorMessageProviderAlreadyLinked
    @brief Message for @c FIRAuthErrorCodeProviderAlreadyExists error code.
 */
static NSString *const kFIRAuthErrorMessageProviderAlreadyLinked =
    @"[ERROR_PROVIDER_ALREADY_LINKED] - User can only be linked to one identity for the given "
        "provider.";

/** @var kFIRAuthErrorMessageNoSuchProvider
    @brief Message for @c FIRAuthErrorCodeNoSuchProvider error code.
 */
static NSString *const kFIRAuthErrorMessageNoSuchProvider = @"User was not linked to an account "
    "with the given provider.";

/** @var kFIRAuthErrorMessageInvalidUserToken
    @brief Message for @c FIRAuthErrorCodeInvalidUserToken error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidUserToken = @"This user's credential isn't valid "
    "for this project. This can happen if the user's token has been tampered with, or if the user "
    "doesn’t belong to the project associated with the API key used in your request.";

/** @var kFIRAuthErrorMessageNetworkError
    @brief Message for @c FIRAuthErrorCodeNetworkError error code.
 */
static NSString *const kFIRAuthErrorMessageNetworkError = @"Network error (such as timeout, "
    "interrupted connection or unreachable host) has occurred.";

/** @var kFIRAuthErrorMessageKeychainError
    @brief Message for @c FIRAuthErrorCodeKeychainError error code.
 */
static NSString *const kFIRAuthErrorMessageKeychainError = @"An error occurred when accessing the "
    "keychain. The @c NSLocalizedFailureReasonErrorKey field in the @c NSError.userInfo dictionary "
    "will contain more information about the error encountered";

/** @var kFIRAuthErrorMessageUserTokenExpired
    @brief Message for @c FIRAuthErrorCodeTokenExpired error code.
 */
static NSString *const kFIRAuthErrorMessageUserTokenExpired = @"The user's credential is no longer "
    "valid. The user must sign in again.";

/** @var kFIRAuthErrorMessageUserNotFound
    @brief Message for @c FIRAuthErrorCodeUserNotFound error code.
 */
static NSString *const kFIRAuthErrorMessageUserNotFound = @"There is no user record corresponding "
    "to this identifier. The user may have been deleted.";

/** @var kFIRAuthErrorMessageInvalidAPIKey
    @brief Message for @c FIRAuthErrorCodeInvalidAPIKey error code.
    @remarks This error is not thrown by the server.
 */
static NSString *const kFIRAuthErrorMessageInvalidAPIKey = @"An invalid API Key was supplied in "
    "the request.";

/** @var kFIRAuthErrorMessageUserMismatch.
    @brief Message for @c FIRAuthErrorCodeInvalidAPIKey error code.
 */
static NSString *const FIRAuthErrorMessageUserMismatch = @"The supplied credentials do not "
    "correspond to the previously signed in user.";

/** @var kFIRAuthErrorMessageCredentialAlreadyInUse
    @brief Message for @c FIRAuthErrorCodeCredentialAlreadyInUse error code.
 */
static NSString *const kFIRAuthErrorMessageCredentialAlreadyInUse = @"This credential is already "
    "associated with a different user account.";

/** @var kFIRAuthErrorMessageOperationNotAllowed
    @brief Message for @c FIRAuthErrorCodeOperationNotAllowed error code.
 */
static NSString *const kFIRAuthErrorMessageOperationNotAllowed = @"The given sign-in provider is "
    "disabled for this Firebase project. Enable it in the Firebase console, under the sign-in "
    "method tab of the Auth section.";

/** @var kFIRAuthErrorMessageWeakPassword
    @brief Message for @c FIRAuthErrorCodeWeakPassword error code.
 */
static NSString *const kFIRAuthErrorMessageWeakPassword = @"The password must be 6 characters long "
    "or more.";

/** @var kFIRAuthErrorMessageAppNotAuthorized
    @brief Message for @c FIRAuthErrorCodeAppNotAuthorized error code.
 */
static NSString *const kFIRAuthErrorMessageAppNotAuthorized = @"This app is not authorized to use "
    "Firebase Authentication with the provided API key. Review your key configuration in the "
    "Google API console and ensure that it accepts requests from your app's bundle ID.";

/** @var kFIRAuthErrorMessageExpiredActionCode
    @brief Message for @c FIRAuthErrorCodeExpiredActionCode error code.
 */
static NSString *const kFIRAuthErrorMessageExpiredActionCode = @"The action code has expired.";

/** @var kFIRAuthErrorMessageInvalidActionCode
    @brief Message for @c FIRAuthErrorCodeInvalidActionCode error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidActionCode = @"The action code is invalid. This "
   "can happen if the code is malformed, expired, or has already been used.";

/** @var kFIRAuthErrorMessageInvalidMessagePayload
    @brief Message for @c FIRAuthErrorCodeInvalidMessagePayload error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidMessagePayload = @"The action code is invalid. "
   "This can happen if the code is malformed, expired, or has already been used.";

/** @var kFIRAuthErrorMessageInvalidSender
    @brief Message for @c FIRAuthErrorCodeInvalidSender error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidSender = @"The email template corresponding to "
    "this action contains invalid characters in its message. Please fix by going to the Auth email "
    "templates section in the Firebase Console.";

/** @var kFIRAuthErrorMessageInvalidRecipientEmail
    @brief Message for @c FIRAuthErrorCodeInvalidRecipient error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidRecipientEmail = @"The action code is invalid. "
   "This can happen if the code is malformed, expired, or has already been used.";

/** @var kFIRAuthErrorMessageMissingIosBundleID
    @brief Message for @c FIRAuthErrorCodeMissingIosbundleID error code.
 */
static NSString *const kFIRAuthErrorMessageMissingIosBundleID =
    @"An iOS Bundle ID must be provided if an App Store ID is provided.";

/** @var kFIRAuthErrorMessageMissingAndroidPackageName
    @brief Message for @c FIRAuthErrorCodeMissingAndroidPackageName error code.
 */
static NSString *const kFIRAuthErrorMessageMissingAndroidPackageName =
    @"An Android Package Name must be provided if the Android App is required to be installed.";

/** @var kFIRAuthErrorMessageUnauthorizedDomain
    @brief Message for @c FIRAuthErrorCodeUnauthorizedDomain error code.
 */
static NSString *const kFIRAuthErrorMessageUnauthorizedDomain = @"The domain of the continue URL "
    "is not whitelisted. Please whitelist the domain in the Firebase console.";

/** @var kFIRAuthErrorMessageInvalidContinueURI
    @brief Message for @c FIRAuthErrorCodeInvalidContinueURI error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidContinueURI =
    @"The continue URL provided in the request is invalid.";

/** @var kFIRAuthErrorMessageMissingEmail
    @brief Message for @c FIRAuthErrorCodeMissingEmail error code.
 */
static NSString *const kFIRAuthErrorMessageMissingEmail = @"An email address must be provided.";

/** @var kFIRAuthErrorMessageMissingContinueURI
    @brief Message for @c FIRAuthErrorCodeMissingContinueURI error code.
 */
static NSString *const kFIRAuthErrorMessageMissingContinueURI =
    @"A continue URL must be provided in the request.";

/** @var kFIRAuthErrorMessageMissingPhoneNumber
    @brief Message for @c FIRAuthErrorCodeMissingPhoneNumber error code.
 */
static NSString *const kFIRAuthErrorMessageMissingPhoneNumber =
    @"To send verification codes, provide a phone number for the recipient.";

/** @var kFIRAuthErrorMessageInvalidPhoneNumber
    @brief Message for @c FIRAuthErrorCodeInvalidPhoneNumber error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidPhoneNumber =
    @"The format of the phone number provided is incorrect. Please enter the phone number in a "
    "format that can be parsed into E.164 format. E.164 phone numbers are written in the format "
    "[+][country code][subscriber number including area code].";

/** @var kFIRAuthErrorMessageMissingVerificationCode
    @brief Message for @c FIRAuthErrorCodeMissingVerificationCode error code.
 */
static NSString *const kFIRAuthErrorMessageMissingVerificationCode =
    @"The phone auth credential was created with an empty SMS verification Code.";

/** @var kFIRAuthErrorMessageInvalidVerificationCode
    @brief Message for @c FIRAuthErrorCodeInvalidVerificationCode error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidVerificationCode =
    @"The SMS verification code used to create the phone auth credential is invalid. Please resend "
    "the verification code SMS and be sure to use the verification code provided by the user.";

/** @var kFIRAuthErrorMessageMissingVerificationID
    @brief Message for @c FIRAuthErrorCodeInvalidVerificationID error code.
 */
static NSString *const kFIRAuthErrorMessageMissingVerificationID =
    @"The phone auth credential was created with an empty verification ID.";

/** @var kFIRAuthErrorMessageInvalidVerificationID
    @brief Message for @c FIRAuthErrorCodeInvalidVerificationID error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidVerificationID =
    @"The verification ID used to create the phone auth credential is invalid.";

/** @var kFIRAuthErrorMessageSessionExpired
    @brief Message for @c FIRAuthErrorCodeSessionExpired error code.
 */
static NSString *const kFIRAuthErrorMessageSessionExpired = @"The SMS code has expired. Please "
    @"re-send the verification code to try again.";

/** @var kFIRAuthErrorMessageMissingAppCredential
    @brief Message for @c FIRAuthErrorCodeMissingAppCredential error code.
 */
static NSString *const kFIRAuthErrorMessageMissingAppCredential = @"The phone verification request "
    "is missing an APNs Device token. Firebase Auth automatically detects APNs Device Tokens, "
    "however, if method swizzling is disabled, the APNs token must be set via the APNSToken "
    "property on FIRAuth or by calling setAPNSToken:type on FIRAuth.";

/** @var kFIRAuthErrorMessageInvalidAppCredential
    @brief Message for @c FIRAuthErrorCodeInvalidAppCredential error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidAppCredential = @"The APNs device token provided "
    "is either incorrect or does not match the private certificate uploaded to the Firebase "
    "Console.";

/** @var kFIRAuthErrorMessageQuotaExceeded
    @brief Message for @c FIRAuthErrorCodeQuotaExceeded error code.
 */
static NSString *const kFIRAuthErrorMessageQuotaExceeded = @"The phone verification quota for this "
    "project has been exceeded.";

/** @var kFIRAuthErrorMessageMissingAppToken
    @brief Message for @c FIRAuthErrorCodeMissingAppToken error code.
 */
static NSString *const kFIRAuthErrorMessageMissingAppToken = @"There seems to be a problem with "
    "your project's Firebase phone number authentication set-up, please make sure to follow the "
    "instructions found at https://firebase.google.com/docs/auth/ios/phone-auth";

/** @var kFIRAuthErrorMessageMissingAppToken
    @brief Message for @c FIRAuthErrorCodeMissingAppToken error code.
 */
static NSString *const kFIRAuthErrorMessageNotificationNotForwarded = @"If app delegate swizzling "
    "is disabled, remote notifications received by UIApplicationDelegate need to be forwarded to "
    "FIRAuth's canHandleNotificaton: method.";

/** @var kFIRAuthErrorMessageAppNotVerified
    @brief Message for @c FIRAuthErrorCodeMissingAppToken error code.
 */
static NSString *const kFIRAuthErrorMessageAppNotVerified = @"Firebase could not retrieve the "
    "silent push notification and therefore could not verify your app. Ensure that you configured "
    "your app correctly to receive push notifications.";

/** @var kFIRAuthErrorMessageCaptchaCheckFailed
    @brief Message for @c FIRAuthErrorCodeCaptchaCheckFailed error code.
 */
static NSString *const kFIRAuthErrorMessageCaptchaCheckFailed = @"The reCAPTCHA response token "
    "provided is either invalid, expired or already";

/** @var kFIRAuthErrorMessageWebContextAlreadyPresented
    @brief Message for @c FIRAuthErrorCodeWebContextAlreadyPresented error code.
 */
static NSString *const kFIRAuthErrorMessageWebContextAlreadyPresented = @"User interaction is "
    "still ongoing, another view cannot be presented.";

/** @var kFIRAuthErrorMessageWebContextCancelled
    @brief Message for @c FIRAuthErrorCodeWebContextCancelled error code.
 */
static NSString *const kFIRAuthErrorMessageWebContextCancelled = @"The interaction was cancelled "
    "by the user.";

/** @var kFIRAuthErrorMessageInvalidClientID
    @brief Message for @c FIRAuthErrorCodeInvalidClientID error code.
 */
static NSString *const kFIRAuthErrorMessageInvalidClientID = @"The OAuth client ID provided is "
    "either invalid or does not match the specified API key.";

/** @var kFIRAuthErrorMessageWebRequestFailed
    @brief Message for @c FIRAuthErrorCodeWebRequestFailed error code.
 */
static NSString *const kFIRAuthErrorMessageWebRequestFailed = @"A network error (such as timeout, "
    "interrupted connection, or unreachable host) has occurred within the web context.";

/** @var kFIRAuthErrorMessageWebInternalError
    @brief Message for @c FIRAuthErrorCodeWebInternalError error code.
 */
static NSString *const kFIRAuthErrorMessageWebInternalError = @"An internal error has occurred "
    "within the SFSafariViewController or UIWebView.";

/** @var kFIRAuthErrorMessageAppVerificationUserInteractionFailure
    @brief Message for @c FIRAuthErrorCodeInvalidClientID error code.
 */
static NSString *const kFIRAuthErrorMessageAppVerificationUserInteractionFailure = @"The app "
  "verification process has failed, print and inspect the error details for more information";

/** @var kFIRAuthErrorMessageNullUser
    @brief Message for @c FIRAuthErrorCodeNullUser error code.
 */
static NSString *const kFIRAuthErrorMessageNullUser = @"A null user object was provided as the "
    "argument for an operation which requires a non-null user object.";

/** @var kFIRAuthErrorMessageInternalError
    @brief Message for @c FIRAuthErrorCodeInternalError error code.
 */
static NSString *const kFIRAuthErrorMessageInternalError = @"An internal error has occurred, "
    "print and inspect the error details for more information.";

/** @var FIRAuthErrorDescription
    @brief The error descrioption, based on the error code.
    @remarks No default case so that we get a compiler warning if a new value was added to the enum.
 */
static NSString *FIRAuthErrorDescription(FIRAuthErrorCode code) {
  switch (code) {
    case FIRAuthErrorCodeInvalidCustomToken:
      return kFIRAuthErrorMessageInvalidCustomToken;
    case FIRAuthErrorCodeCustomTokenMismatch:
      return kFIRAuthErrorMessageCustomTokenMismatch;
    case FIRAuthErrorCodeInvalidEmail:
      return kFIRAuthErrorMessageInvalidEmail;
    case FIRAuthErrorCodeInvalidCredential:
      return kFIRAuthErrorMessageInvalidCredential;
    case FIRAuthErrorCodeUserDisabled:
      return kFIRAuthErrorMessageUserDisabled;
    case FIRAuthErrorCodeEmailAlreadyInUse:
      return kFIRAuthErrorMessageEmailAlreadyInUse;
    case FIRAuthErrorCodeWrongPassword:
      return kFIRAuthErrorMessageWrongPassword;
    case FIRAuthErrorCodeTooManyRequests:
      return kFIRAuthErrorMessageTooManyRequests;
    case FIRAuthErrorCodeAccountExistsWithDifferentCredential:
      return kFIRAuthErrorMessageAccountExistsWithDifferentCredential;
    case FIRAuthErrorCodeRequiresRecentLogin:
      return kFIRAuthErrorMessageRequiresRecentLogin;
    case FIRAuthErrorCodeProviderAlreadyLinked:
      return kFIRAuthErrorMessageProviderAlreadyLinked;
    case FIRAuthErrorCodeNoSuchProvider:
      return kFIRAuthErrorMessageNoSuchProvider;
    case FIRAuthErrorCodeInvalidUserToken:
      return kFIRAuthErrorMessageInvalidUserToken;
    case FIRAuthErrorCodeNetworkError:
      return kFIRAuthErrorMessageNetworkError;
    case FIRAuthErrorCodeKeychainError:
      return kFIRAuthErrorMessageKeychainError;
    case FIRAuthErrorCodeUserTokenExpired:
      return kFIRAuthErrorMessageUserTokenExpired;
    case FIRAuthErrorCodeUserNotFound:
      return kFIRAuthErrorMessageUserNotFound;
    case FIRAuthErrorCodeInvalidAPIKey:
      return kFIRAuthErrorMessageInvalidAPIKey;
    case FIRAuthErrorCodeCredentialAlreadyInUse:
      return kFIRAuthErrorMessageCredentialAlreadyInUse;
    case FIRAuthErrorCodeInternalError:
      return kFIRAuthErrorMessageInternalError;
    case FIRAuthErrorCodeUserMismatch:
      return FIRAuthErrorMessageUserMismatch;
    case FIRAuthErrorCodeOperationNotAllowed:
      return kFIRAuthErrorMessageOperationNotAllowed;
    case FIRAuthErrorCodeWeakPassword:
      return kFIRAuthErrorMessageWeakPassword;
    case FIRAuthErrorCodeAppNotAuthorized:
      return kFIRAuthErrorMessageAppNotAuthorized;
    case FIRAuthErrorCodeExpiredActionCode:
      return kFIRAuthErrorMessageExpiredActionCode;
    case FIRAuthErrorCodeInvalidActionCode:
      return kFIRAuthErrorMessageInvalidActionCode;
    case FIRAuthErrorCodeInvalidSender:
      return kFIRAuthErrorMessageInvalidSender;
    case FIRAuthErrorCodeInvalidMessagePayload:
      return kFIRAuthErrorMessageInvalidMessagePayload;
    case FIRAuthErrorCodeInvalidRecipientEmail:
      return kFIRAuthErrorMessageInvalidRecipientEmail;
    case FIRAuthErrorCodeMissingIosBundleID:
      return kFIRAuthErrorMessageMissingIosBundleID;
    case FIRAuthErrorCodeMissingAndroidPackageName:
      return kFIRAuthErrorMessageMissingAndroidPackageName;
    case FIRAuthErrorCodeUnauthorizedDomain:
      return kFIRAuthErrorMessageUnauthorizedDomain;
    case FIRAuthErrorCodeInvalidContinueURI:
      return kFIRAuthErrorMessageInvalidContinueURI;
    case FIRAuthErrorCodeMissingContinueURI:
      return kFIRAuthErrorMessageMissingContinueURI;
    case FIRAuthErrorCodeMissingEmail:
      return kFIRAuthErrorMessageMissingEmail;
    case FIRAuthErrorCodeMissingPhoneNumber:
      return kFIRAuthErrorMessageMissingPhoneNumber;
    case FIRAuthErrorCodeInvalidPhoneNumber:
      return kFIRAuthErrorMessageInvalidPhoneNumber;
    case FIRAuthErrorCodeMissingVerificationCode:
      return kFIRAuthErrorMessageMissingVerificationCode;
    case FIRAuthErrorCodeInvalidVerificationCode:
      return kFIRAuthErrorMessageInvalidVerificationCode;
    case FIRAuthErrorCodeMissingVerificationID:
      return kFIRAuthErrorMessageMissingVerificationID;
    case FIRAuthErrorCodeInvalidVerificationID:
      return kFIRAuthErrorMessageInvalidVerificationID;
    case FIRAuthErrorCodeSessionExpired:
      return kFIRAuthErrorMessageSessionExpired;
    case FIRAuthErrorCodeMissingAppCredential:
      return kFIRAuthErrorMessageMissingAppCredential;
    case FIRAuthErrorCodeInvalidAppCredential:
      return kFIRAuthErrorMessageInvalidAppCredential;
    case FIRAuthErrorCodeQuotaExceeded:
      return kFIRAuthErrorMessageQuotaExceeded;
    case FIRAuthErrorCodeMissingAppToken:
      return kFIRAuthErrorMessageMissingAppToken;
    case FIRAuthErrorCodeNotificationNotForwarded:
      return kFIRAuthErrorMessageNotificationNotForwarded;
    case FIRAuthErrorCodeAppNotVerified:
      return kFIRAuthErrorMessageAppNotVerified;
    case FIRAuthErrorCodeCaptchaCheckFailed:
      return kFIRAuthErrorMessageCaptchaCheckFailed;
    case FIRAuthErrorCodeWebContextAlreadyPresented:
      return kFIRAuthErrorMessageWebContextAlreadyPresented;
    case FIRAuthErrorCodeWebContextCancelled:
      return kFIRAuthErrorMessageWebContextCancelled;
    case FIRAuthErrorCodeInvalidClientID:
      return kFIRAuthErrorMessageInvalidClientID;
    case FIRAuthErrorCodeAppVerificationUserInteractionFailure:
      return kFIRAuthErrorMessageAppVerificationUserInteractionFailure;
    case FIRAuthErrorCodeWebNetworkRequestFailed:
      return kFIRAuthErrorMessageWebRequestFailed;
    case FIRAuthErrorCodeNullUser:
      return kFIRAuthErrorMessageNullUser;
    case FIRAuthErrorCodeWebInternalError:
      return kFIRAuthErrorMessageWebInternalError;
  }
}

/** @var FIRAuthErrorCodeString
    @brief The the error short string, based on the error code.
    @remarks No default case so that we get a compiler warning if a new value was added to the enum.
 */
static NSString *const FIRAuthErrorCodeString(FIRAuthErrorCode code) {
  switch (code) {
    case FIRAuthErrorCodeInvalidCustomToken:
      return @"ERROR_INVALID_CUSTOM_TOKEN";
    case FIRAuthErrorCodeCustomTokenMismatch:
      return @"ERROR_CUSTOM_TOKEN_MISMATCH";
    case FIRAuthErrorCodeInvalidEmail:
      return @"ERROR_INVALID_EMAIL";
    case FIRAuthErrorCodeInvalidCredential:
      return @"ERROR_INVALID_CREDENTIAL";
    case FIRAuthErrorCodeUserDisabled:
      return @"ERROR_USER_DISABLED";
    case FIRAuthErrorCodeEmailAlreadyInUse:
      return @"ERROR_EMAIL_ALREADY_IN_USE";
    case FIRAuthErrorCodeWrongPassword:
      return @"ERROR_WRONG_PASSWORD";
    case FIRAuthErrorCodeTooManyRequests:
      return @"ERROR_TOO_MANY_REQUESTS";
    case FIRAuthErrorCodeAccountExistsWithDifferentCredential:
      return @"ERROR_ACCOUNT_EXISTS_WITH_DIFFERENT_CREDENTIAL";
    case FIRAuthErrorCodeRequiresRecentLogin:
      return @"ERROR_REQUIRES_RECENT_LOGIN";
    case FIRAuthErrorCodeProviderAlreadyLinked:
      return @"ERROR_PROVIDER_ALREADY_LINKED";
    case FIRAuthErrorCodeNoSuchProvider:
      return @"ERROR_NO_SUCH_PROVIDER";
    case FIRAuthErrorCodeInvalidUserToken:
      return @"ERROR_INVALID_USER_TOKEN";
    case FIRAuthErrorCodeNetworkError:
      return @"ERROR_NETWORK_REQUEST_FAILED";
    case FIRAuthErrorCodeKeychainError:
      return @"ERROR_KEYCHAIN_ERROR";
    case FIRAuthErrorCodeUserTokenExpired:
      return @"ERROR_USER_TOKEN_EXPIRED";
    case FIRAuthErrorCodeUserNotFound:
      return @"ERROR_USER_NOT_FOUND";
    case FIRAuthErrorCodeInvalidAPIKey:
      return @"ERROR_INVALID_API_KEY";
    case FIRAuthErrorCodeCredentialAlreadyInUse:
      return @"ERROR_CREDENTIAL_ALREADY_IN_USE";
    case FIRAuthErrorCodeInternalError:
      return @"ERROR_INTERNAL_ERROR";
    case FIRAuthErrorCodeUserMismatch:
      return @"ERROR_USER_MISMATCH";
    case FIRAuthErrorCodeOperationNotAllowed:
      return @"ERROR_OPERATION_NOT_ALLOWED";
    case FIRAuthErrorCodeWeakPassword:
      return @"ERROR_WEAK_PASSWORD";
    case FIRAuthErrorCodeAppNotAuthorized:
      return @"ERROR_APP_NOT_AUTHORIZED";
    case FIRAuthErrorCodeExpiredActionCode:
      return @"ERROR_EXPIRED_ACTION_CODE";
    case FIRAuthErrorCodeInvalidActionCode:
      return @"ERROR_INVALID_ACTION_CODE";
    case FIRAuthErrorCodeInvalidMessagePayload:
      return @"ERROR_INVALID_MESSAGE_PAYLOAD";
    case FIRAuthErrorCodeInvalidSender:
      return @"ERROR_INVALID_SENDER";
    case FIRAuthErrorCodeInvalidRecipientEmail:
      return @"ERROR_INVALID_RECIPIENT_EMAIL";
    case FIRAuthErrorCodeMissingIosBundleID:
      return @"ERROR_MISSING_IOS_BUNDLE_ID";
    case FIRAuthErrorCodeMissingAndroidPackageName:
      return @"ERROR_MISSING_ANDROID_PKG_NAME";
    case FIRAuthErrorCodeUnauthorizedDomain:
      return @"ERROR_UNAUTHORIZED_DOMAIN";
    case FIRAuthErrorCodeInvalidContinueURI:
      return @"ERROR_INVALID_CONTINUE_URI";
    case FIRAuthErrorCodeMissingContinueURI:
      return @"ERROR_MISSING_CONTINUE_URI";
    case FIRAuthErrorCodeMissingEmail:
      return @"ERROR_MISSING_EMAIL";
    case FIRAuthErrorCodeMissingPhoneNumber:
      return @"ERROR_MISSING_PHONE_NUMBER";
    case FIRAuthErrorCodeInvalidPhoneNumber:
      return @"ERROR_INVALID_PHONE_NUMBER";
    case FIRAuthErrorCodeMissingVerificationCode:
      return @"ERROR_MISSING_VERIFICATION_CODE";
    case FIRAuthErrorCodeInvalidVerificationCode:
      return @"ERROR_INVALID_VERIFICATION_CODE";
    case FIRAuthErrorCodeMissingVerificationID:
      return @"ERROR_MISSING_VERIFICATION_ID";
    case FIRAuthErrorCodeInvalidVerificationID:
      return @"ERROR_INVALID_VERIFICATION_ID";
    case FIRAuthErrorCodeSessionExpired:
      return @"ERROR_SESSION_EXPIRED";
    case FIRAuthErrorCodeMissingAppCredential:
      return @"MISSING_APP_CREDENTIAL";
    case FIRAuthErrorCodeInvalidAppCredential:
      return @"INVALID_APP_CREDENTIAL";
    case FIRAuthErrorCodeQuotaExceeded:
      return @"ERROR_QUOTA_EXCEEDED";
    case FIRAuthErrorCodeMissingAppToken:
      return @"ERROR_MISSING_APP_TOKEN";
    case FIRAuthErrorCodeNotificationNotForwarded:
      return @"ERROR_NOTIFICATION_NOT_FORWARDED";
    case FIRAuthErrorCodeAppNotVerified:
      return @"ERROR_APP_NOT_VERIFIED";
    case FIRAuthErrorCodeCaptchaCheckFailed:
      return @"ERROR_CAPTCHA_CHECK_FAILED";
    case FIRAuthErrorCodeWebContextAlreadyPresented:
      return @"ERROR_WEB_CONTEXT_ALREADY_PRESENTED";
    case FIRAuthErrorCodeWebContextCancelled:
      return @"ERROR_WEB_CONTEXT_CANCELLED";
    case FIRAuthErrorCodeInvalidClientID:
      return @"ERROR_INVALID_CLIENT_ID";
    case FIRAuthErrorCodeAppVerificationUserInteractionFailure:
      return @"ERROR_APP_VERIFICATION_FAILED";
    case FIRAuthErrorCodeWebNetworkRequestFailed:
      return @"ERROR_WEB_NETWORK_REQUEST_FAILED";
    case FIRAuthErrorCodeNullUser:
      return @"ERROR_NULL_USER";
    case FIRAuthErrorCodeWebInternalError:
      return @"ERROR_WEB_INTERNAL_ERROR";
  }
}

@implementation FIRAuthErrorUtils

+ (NSError *)errorWithCode:(FIRAuthInternalErrorCode)code {
  return [self errorWithCode:code message:nil];
}

+ (NSError *)errorWithCode:(FIRAuthInternalErrorCode)code
                   message:(nullable NSString *)message {
  NSDictionary *userInfo = nil;
  if (message.length) {
    userInfo = @{
      NSLocalizedDescriptionKey : message
    };
  }
  return [self errorWithCode:code userInfo:userInfo];
}

+ (NSError *)errorWithCode:(FIRAuthInternalErrorCode)code
           underlyingError:(nullable NSError *)underlyingError {
  NSDictionary *errorUserInfo = nil;
  if (underlyingError) {
    errorUserInfo = @{
      NSUnderlyingErrorKey : underlyingError
    };
  }
  return [self errorWithCode:code userInfo:errorUserInfo];
}

+ (NSError *)errorWithCode:(FIRAuthInternalErrorCode)code userInfo:(NSDictionary *)userInfo {
  BOOL isPublic = (code & FIRAuthPublicErrorCodeFlag) == FIRAuthPublicErrorCodeFlag;
  if (isPublic) {
    // This is a public error. Return it as a public error and add a description.
    NSInteger errorCode = code & ~FIRAuthPublicErrorCodeFlag;
    NSMutableDictionary *errorUserInfo = [NSMutableDictionary dictionaryWithDictionary:userInfo];
    if (!errorUserInfo[NSLocalizedDescriptionKey]) {
      errorUserInfo[NSLocalizedDescriptionKey] = FIRAuthErrorDescription(errorCode);
    }
    errorUserInfo[FIRAuthErrorNameKey] = FIRAuthErrorCodeString(errorCode);
    return [NSError errorWithDomain:FIRAuthErrorDomain code:errorCode userInfo:errorUserInfo];
  } else {
    // This is an internal error. Wrap it in an internal error.
    NSError *error =
        [NSError errorWithDomain:FIRAuthInternalErrorDomain code:code userInfo:userInfo];
    return [self errorWithCode:FIRAuthInternalErrorCodeInternalError underlyingError:error];
  }
}

+ (NSError *)RPCRequestEncodingErrorWithUnderlyingError:(NSError *)underlyingError {
  return [self errorWithCode:FIRAuthInternalErrorCodeRPCRequestEncodingError
             underlyingError:underlyingError];
}

+ (NSError *)JSONSerializationErrorForUnencodableType {
  return [self errorWithCode:FIRAuthInternalErrorCodeJSONSerializationError];
}

+ (NSError *)JSONSerializationErrorWithUnderlyingError:(NSError *)underlyingError {
  return [self errorWithCode:FIRAuthInternalErrorCodeJSONSerializationError
             underlyingError:underlyingError];
}

+ (NSError *)networkErrorWithUnderlyingError:(NSError *)underlyingError {
  return [self errorWithCode:FIRAuthInternalErrorCodeNetworkError
             underlyingError:underlyingError];
}

+ (NSError *)unexpectedErrorResponseWithData:(NSData *)data
                             underlyingError:(NSError *)underlyingError {
  return [self errorWithCode:FIRAuthInternalErrorCodeUnexpectedErrorResponse userInfo:@{
    FIRAuthErrorUserInfoDataKey : data,
    NSUnderlyingErrorKey : underlyingError
  }];
}

+ (NSError *)unexpectedErrorResponseWithDeserializedResponse:(id)deserializedResponse {
  return [self errorWithCode:FIRAuthInternalErrorCodeUnexpectedErrorResponse userInfo:@{
    FIRAuthErrorUserInfoDeserializedResponseKey : deserializedResponse
  }];
}

+ (NSError *)unexpectedResponseWithData:(NSData *)data
                        underlyingError:(NSError *)underlyingError {
  return [self errorWithCode:FIRAuthInternalErrorCodeUnexpectedResponse userInfo:@{
    FIRAuthErrorUserInfoDataKey : data,
    NSUnderlyingErrorKey : underlyingError
  }];
}

+ (NSError *)unexpectedResponseWithDeserializedResponse:(id)deserializedResponse {
  return [self errorWithCode:FIRAuthInternalErrorCodeUnexpectedResponse userInfo:@{
    FIRAuthErrorUserInfoDeserializedResponseKey : deserializedResponse
  }];
}

+ (NSError *)unexpectedResponseWithDeserializedResponse:(nullable id)deserializedResponse
                                        underlyingError:(NSError *)underlyingError {
  NSMutableDictionary *userInfo =
      [NSMutableDictionary dictionaryWithDictionary:@{ NSUnderlyingErrorKey : underlyingError }];
  if (deserializedResponse) {
    userInfo[FIRAuthErrorUserInfoDeserializedResponseKey] = deserializedResponse;
  }
  return [self errorWithCode:FIRAuthInternalErrorCodeUnexpectedResponse userInfo:userInfo];
}

+ (NSError *)RPCResponseDecodingErrorWithDeserializedResponse:(id)deserializedResponse
                                              underlyingError:(NSError *)underlyingError {
  return [self errorWithCode:FIRAuthInternalErrorCodeRPCResponseDecodingError userInfo:@{
    FIRAuthErrorUserInfoDeserializedResponseKey : deserializedResponse,
    NSUnderlyingErrorKey : underlyingError
  }];
}

+ (NSError *)emailAlreadyInUseErrorWithEmail:(nullable NSString *)email {
  NSMutableDictionary *userInfo = [[NSMutableDictionary alloc] init];
  if (email.length) {
    userInfo[FIRAuthErrorUserInfoEmailKey] = email;
  }
  return [self errorWithCode:FIRAuthInternalErrorCodeEmailAlreadyInUse userInfo:userInfo];
}

+ (NSError *)userDisabledErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeUserDisabled message:message];
}

+ (NSError *)wrongPasswordErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeWrongPassword message:message];
}

+ (NSError *)tooManyRequestsErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeTooManyRequests message:message];
}

+ (NSError *)invalidCustomTokenErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidCustomToken message:message];
}

+ (NSError *)customTokenMistmatchErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeCustomTokenMismatch message:message];
}

+ (NSError *)invalidCredentialErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidCredential message:message];
}

+ (NSError *)requiresRecentLoginErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeRequiresRecentLogin message:message];
}

+ (NSError *)invalidUserTokenErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidUserToken message:message];
}

+ (NSError *)invalidEmailErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidEmail message:message];
}

+ (NSError *)accountExistsWithDifferentCredentialErrorWithEmail:(nullable NSString *)email {
  return [self errorWithCode:FIRAuthInternalErrorCodeAccountExistsWithDifferentCredential
                    userInfo:@{ FIRAuthErrorUserInfoEmailKey : email }];
}

+ (NSError *)providerAlreadyLinkedError {
  return [self errorWithCode:FIRAuthInternalErrorCodeProviderAlreadyLinked];
}

+ (NSError *)noSuchProviderError {
  return [self errorWithCode:FIRAuthInternalErrorCodeNoSuchProvider];
}

+ (NSError *)userTokenExpiredErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeUserTokenExpired message:message];
}

+ (NSError *)userNotFoundErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeUserNotFound message:message];
}

+ (NSError *)invalidAPIKeyError {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidAPIKey];
}

+ (NSError *)userMismatchError {
  return [self errorWithCode:FIRAuthInternalErrorCodeUserMismatch];
}

+ (NSError *)credentialAlreadyInUseErrorWithMessage:(nullable NSString *)message
                                         credential:(nullable FIRPhoneAuthCredential *)credential {
  if (credential) {
    return [self errorWithCode:FIRAuthInternalErrorCodeCredentialAlreadyInUse
                    userInfo:@{ FIRAuthUpdatedCredentialKey : credential }];
  }
  return [self errorWithCode:FIRAuthInternalErrorCodeCredentialAlreadyInUse message:message];
}

+ (NSError *)operationNotAllowedErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeOperationNotAllowed message:message];
}

+ (NSError *)weakPasswordErrorWithServerResponseReason:(NSString *)reason {
  return [self errorWithCode:FIRAuthInternalErrorCodeWeakPassword userInfo:@{
    NSLocalizedFailureReasonErrorKey : reason
  }];
}

+ (NSError *)appNotAuthorizedError {
  return [self errorWithCode:FIRAuthInternalErrorCodeAppNotAuthorized];
}

+ (NSError *)expiredActionCodeErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeExpiredActionCode message:message];
}

+ (NSError *)invalidActionCodeErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidActionCode message:message];
}

+ (NSError *)invalidMessagePayloadErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidMessagePayload message:message];
}

+ (NSError *)invalidSenderErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidSender message:message];
}

+ (NSError *)invalidRecipientEmailErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidRecipientEmail message:message];
}

+ (NSError *)missingIosBundleIDErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthinternalErrorCodeMissingIosBundleID message:message];
}

+ (NSError *)missingAndroidPackageNameErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeMissingAndroidPackageName message:message];
}

+ (NSError *)unauthorizedDomainErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeUnauthorizedDomain message:message];
}

+ (NSError *)invalidContinueURIErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidContinueURI message:message];
}

+ (NSError *)missingContinueURIErrorWithMessage:(nullable NSString *)message {
  return[self errorWithCode:FIRAuthInternalErrorCodeMissingContinueURI message:message];
}

+ (NSError *)missingEmailErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeMissingEmail message:message];
}

+ (NSError *)missingPhoneNumberErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeMissingPhoneNumber message:message];
}

+ (NSError *)invalidPhoneNumberErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidPhoneNumber message:message];
}

+ (NSError *)missingVerificationCodeErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeMissingVerificationCode message:message];
}

+ (NSError *)invalidVerificationCodeErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidVerificationCode message:message];
}

+ (NSError *)missingVerificationIDErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeMissingVerificationID message:message];
}

+ (NSError *)invalidVerificationIDErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidVerificationID message:message];
}

+ (NSError *)sessionExpiredErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeSessionExpired message:message];
}

+ (NSError *)missingAppCredentialWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeMissingAppCredential message:message];
}

+ (NSError *)invalidAppCredentialWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeInvalidAppCredential message:message];
}

+ (NSError *)quotaExceededErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeQuotaExceeded message:message];
}

+ (NSError *)missingAppTokenErrorWithUnderlyingError:(nullable NSError *)underlyingError {
  return [self errorWithCode:FIRAuthInternalErrorCodeMissingAppToken
             underlyingError:underlyingError];
}

+ (NSError *)notificationNotForwardedError {
  return [self errorWithCode:FIRAuthInternalErrorCodeNotificationNotForwarded];
}

+ (NSError *)appNotVerifiedErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeAppNotVerified message:message];
}

+ (NSError *)captchaCheckFailedErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeCaptchaCheckFailed message:message];
}

+ (NSError *)webContextAlreadyPresentedErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeWebContextAlreadyPresented message:message];
}

+ (NSError *)webContextCancelledErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeWebContextCancelled message:message];
}

+ (NSError *)appVerificationUserInteractionFailureWithReason:(NSString *)reason {
  return [self errorWithCode:FIRAuthInternalErrorCodeAppVerificationUserInteractionFailure
                    userInfo:@{
    NSLocalizedFailureReasonErrorKey : reason
  }];
}

+ (NSError *)URLResponseErrorWithCode:(NSString *)code message:(nullable NSString *)message {
  if ([code isEqualToString:kURLResponseErrorCodeInvalidClientID]) {
    return [self errorWithCode:FIRAuthInternalErrorCodeInvalidClientID message:message];
  }
  if ([code isEqualToString:kURLResponseErrorCodeNetworkRequestFailed]) {
    return [self errorWithCode:FIRAuthInternalErrorCodeWebNetworkRequestFailed message:message];
  }
  if ([code isEqualToString:kURLResponseErrorCodeInternalError]) {
    return [self errorWithCode:FIRAuthInternalErrorCodeWebInternalError message:message];
  }
  return nil;
}

+ (NSError *)nullUserErrorWithMessage:(nullable NSString *)message {
  return [self errorWithCode:FIRAuthInternalErrorCodeNullUser message:message];
}

+ (NSError *)keychainErrorWithFunction:(NSString *)keychainFunction status:(OSStatus)status {
  NSString *failureReason = [NSString stringWithFormat:@"%@ (%li)", keychainFunction, (long)status];
  return [self errorWithCode:FIRAuthInternalErrorCodeKeychainError userInfo:@{
    NSLocalizedFailureReasonErrorKey : failureReason,
  }];
}

@end

NS_ASSUME_NONNULL_END