import { useCallback, useEffect, useRef } from 'react';
import { useQueryClient } from '@tanstack/react-query';

import useAuthProvider, { defaultAuthParams } from './useAuthProvider';
import { useResetStore } from '../store';
import { useBasename, useLocation, useNavigate } from '../routing';
import { removeDoubleSlashes } from '../routing/useCreatePath';
import type { RouterLocation } from '../routing/RouterProvider';

/**
 * Get a callback for calling the authProvider.logout() method,
 * redirect to the login page, and clear the store.
 *
 * @see useAuthProvider
 *
 * @returns {Function} logout callback
 *
 * @example
 *
 * import { useLogout } from 'react-admin';
 *
 * const LogoutButton = () => {
 *     const logout = useLogout();
 *     const handleClick = () => logout();
 *     return <button onClick={handleClick}>Logout</button>;
 * }
 */
const useLogout = (): Logout => {
    const authProvider = useAuthProvider();
    const queryClient = useQueryClient();
    const resetStore = useResetStore();
    const navigate = useNavigate();
    const location = useLocation();
    const locationRef = useRef<RouterLocation>(location);
    const basename = useBasename();
    const loginUrl = removeDoubleSlashes(
        `${basename}/${defaultAuthParams.loginUrl}`
    );

    /*
     * We need the current location to pass in the router state
     * so that the login hook knows where to redirect to as next route after login.
     *
     * But if we used the location from useLocation as a dependency of the logout
     * function, it would be rebuilt each time the user changes location.
     * Consequently, that would force a rerender of all components using this hook
     * upon navigation (CoreAdminRouter for example).
     *
     * To avoid that, we store the location in a ref.
     */
    useEffect(() => {
        locationRef.current = location;
    }, [location]);

    const logout: Logout = useCallback(
        (
            params = {},
            redirectFromCaller,
            redirectToCurrentLocationAfterLogin = true
        ) => {
            if (authProvider) {
                return authProvider.logout(params).then(redirectFromLogout => {
                    if (
                        redirectFromLogout === false ||
                        redirectFromCaller === false
                    ) {
                        resetStore();
                        queryClient.clear();
                        // do not redirect
                        return;
                    }

                    const finalRedirectTo =
                        redirectFromCaller || redirectFromLogout || loginUrl;

                    if (finalRedirectTo?.startsWith('http')) {
                        // absolute link (e.g. https://my.oidc.server/login)
                        resetStore();
                        queryClient.clear();
                        window.location.href = finalRedirectTo;
                        return finalRedirectTo;
                    }

                    // redirectTo is an internal location that may contain a query string, e.g. '/login?foo=bar'
                    // we must split it to pass a structured location to navigate()
                    const redirectToParts = finalRedirectTo.split('?');
                    const newLocation: Partial<RouterLocation> = {
                        pathname: redirectToParts[0],
                    };
                    let newLocationOptions = {};

                    if (
                        redirectToCurrentLocationAfterLogin &&
                        locationRef.current &&
                        locationRef.current.pathname
                    ) {
                        newLocationOptions = {
                            state: {
                                nextPathname: locationRef.current.pathname,
                                nextSearch: locationRef.current.search,
                            },
                        };
                    }
                    if (redirectToParts[1]) {
                        newLocation.search = redirectToParts[1];
                    }

                    // We need to navigate and reset the store after a litte delay to avoid a race condition
                    // between the store reset and the navigation.
                    //
                    // This would only happen when the `authProvider.getPermissions` method returns
                    // a resolved promise with no delay: If the store was reset before the navigation,
                    // the `usePermissions` query would reset, causing the `CoreAdminRoutes` component to
                    // rerender the `LogoutOnMount` component leading to an infinite loop.
                    setTimeout(() => {
                        navigate(newLocation, newLocationOptions);

                        resetStore();
                        queryClient.clear();
                    }, 0);

                    return redirectFromLogout;
                });
            } else {
                navigate(
                    {
                        pathname: loginUrl,
                    },
                    {
                        state: {
                            nextPathname:
                                locationRef.current &&
                                locationRef.current.pathname,
                        },
                    }
                );
                resetStore();
                queryClient.clear();
                return Promise.resolve();
            }
        },
        [authProvider, resetStore, loginUrl, queryClient, navigate]
    );

    return logout;
};

/**
 * Log the current user out by calling the authProvider.logout() method,
 * and redirect them to the login screen.
 *
 * @param {Object} params The parameters to pass to the authProvider
 * @param {string} redirectTo The path name to redirect the user to (optional, defaults to login)
 * @param {boolean} redirectToCurrentLocationAfterLogin Whether the button shall record the current location to redirect to it after login. true by default.
 *
 * @return {Promise} The authProvider response
 */
type Logout = (
    params?: any,
    redirectTo?: string | false,
    redirectToCurrentLocationAfterLogin?: boolean
) => Promise<any>;

export default useLogout;