import { useCallback } from 'react';

import useAuthProvider, { defaultAuthParams } from './useAuthProvider';
import useLogout from './useLogout';
import { useNotify } from '../notification';
import { useBasename } from '../routing';
import { removeDoubleSlashes } from '../routing/useCreatePath';

/**
 * Get a callback for calling the authProvider.checkAuth() method.
 * In case of rejection, redirects to the login page, displays a notification,
 * and throws an error.
 *
 * This is a low level hook. See those more specialized hooks
 * for common authentication tasks, based on useCheckAuth.
 *
 * @see useAuthenticated
 * @see useAuthState
 *
 * @returns {Function} checkAuth callback
 *
 * @example
 *
 * import { useCheckAuth } from 'react-admin';
 *
 * const MyProtectedPage = () => {
 *     const checkAuth = useCheckAuth();
 *     useEffect(() => {
 *         checkAuth().catch(() => {});
 *     }, []);
 *     return <p>Private content: EZAEZEZAET</p>
 * } // tip: use useAuthenticated() hook instead
 *
 * const MyPage = () => {
 *     const checkAuth = useCheckAuth();
 *     const [authenticated, setAuthenticated] = useState(true); // optimistic auth
 *     useEffect(() => {
 *         checkAuth({}, false)
 *              .then(() => setAuthenticated(true))
 *              .catch(() => setAuthenticated(false));
 *     }, []);
 *     return authenticated ? <Bar /> : <BarNotAuthenticated />;
 * } // tip: use useAuthState() hook instead
 */
export const useCheckAuth = (): CheckAuth => {
    const authProvider = useAuthProvider();
    const notify = useNotify();
    const logout = useLogout();
    const basename = useBasename();
    const loginUrl = removeDoubleSlashes(
        `${basename}/${defaultAuthParams.loginUrl}`
    );

    const checkAuth = useCallback(
        (params: any = {}, logoutOnFailure = true, redirectTo = loginUrl) =>
            authProvider
                ? authProvider.checkAuth(params).catch(error => {
                      if (logoutOnFailure) {
                          logout(
                              {},
                              error && error.redirectTo != null
                                  ? error.redirectTo
                                  : redirectTo
                          );
                          const shouldSkipNotify =
                              error && error.message === false;
                          !shouldSkipNotify &&
                              notify(
                                  getErrorMessage(
                                      error,
                                      'ra.auth.auth_check_error'
                                  ),
                                  { type: 'error' }
                              );
                      }
                      throw error;
                  })
                : checkAuthWithoutAuthProvider(),
        [authProvider, logout, notify, loginUrl]
    );

    return checkAuth;
};

const checkAuthWithoutAuthProvider = () => Promise.resolve();

/**
 * Check if the current user is authenticated by calling authProvider.checkAuth().
 * Logs the user out on failure.
 *
 * @param {Object} params The parameters to pass to the authProvider
 * @param {boolean} logoutOnFailure Whether the user should be logged out if the authProvider fails to authenticate them. True by default.
 * @param {string} redirectTo The login form url. Defaults to '/login'
 *
 * @return {Promise} Resolved to the authProvider response if the user passes the check, or rejected with an error otherwise
 */
export type CheckAuth = (
    params?: any,
    logoutOnFailure?: boolean,
    redirectTo?: string
) => Promise<any>;

const getErrorMessage = (error, defaultMessage) =>
    typeof error === 'string'
        ? error
        : typeof error === 'undefined' || !error.message
          ? defaultMessage
          : error.message;