/*!
 * @license
 * Copyright © 2005-2023 Hyland Software, Inc. and its affiliates. All rights reserved.
 *
 * 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 ee from 'event-emitter';
import { AlfrescoApiClient, AlfrescoApiClientPromise } from '../alfrescoApiClient';
import { AlfrescoApiConfig } from '../alfrescoApiConfig';
import { Authentication } from './authentication';
import { Storage } from '../storage';
import { HttpClient } from '../api-clients/http-client.interface';
import { isBrowser } from '../utils';

export class ProcessAuth extends AlfrescoApiClient {
    ticket: string;

    authentications: Authentication = {
        basicAuth: { ticket: '' },
        type: 'activiti'
    };

    constructor(config: AlfrescoApiConfig, httpClient?: HttpClient) {
        super(undefined, httpClient);
        this.storage = Storage.getInstance();
        this.storage.setDomainPrefix(config.domainPrefix);

        this.className = 'ProcessAuth';

        if (!isBrowser()) {
            this.defaultHeaders = {
                'user-agent': 'alfresco-js-api'
            };
        }

        this.setConfig(config);
    }

    setConfig(config: AlfrescoApiConfig) {
        this.config = config;
        this.ticket = undefined;

        this.basePath = config.hostBpm + '/' + this.config.contextRootBpm; //Activiti Call

        if (this.config.ticketBpm) {
            this.setTicket(config.ticketBpm);
        } else if (this.storage.getItem('ticket-BPM')) {
            this.setTicket(this.storage.getItem('ticket-BPM'));
        }
    }

    changeHost() {
        this.basePath = this.config.hostBpm + '/' + this.config.contextRootBpm; //Activiti Call
        this.ticket = undefined;
    }

    changeCsrfConfig(disableCsrf: boolean) {
        this.config.disableCsrf = disableCsrf;
    }

    saveUsername(username: string) {
        if (this.storage.supportsStorage()) {
            this.storage.setItem('APS_USERNAME', username);
        }
    }

    /**
     * login Activiti API
     *
     * @param username Username to login
     * @param password Password to login
     * @returns A promise that returns {new authentication ticket} if resolved and {error} if rejected.
     */
    login(username: string, password: string): AlfrescoApiClientPromise<string> {
        this.authentications.basicAuth.username = username;
        this.authentications.basicAuth.password = password;

        const headerParams = {
            'Content-Type': 'application/x-www-form-urlencoded',
            'Cache-Control': 'no-cache'
        };
        const formParams = {
            j_username: this.authentications.basicAuth.username,
            j_password: this.authentications.basicAuth.password,
            _spring_security_remember_me: true,
            submit: 'Login'
        };

        const contentTypes = ['application/x-www-form-urlencoded'];
        const accepts = ['application/json'];

        const promise: any = new Promise<string>((resolve, reject) => {
            this.callApi('/app/authentication', 'POST', {}, {}, headerParams, formParams, {}, contentTypes, accepts).then(
                () => {
                    this.saveUsername(username);
                    const ticket = this.basicAuth(this.authentications.basicAuth.username, this.authentications.basicAuth.password);
                    this.setTicket(ticket);
                    promise.emit('success');
                    this.emit('logged-in');
                    resolve(ticket);
                },
                (error) => {
                    this.saveUsername('');
                    if (error.status === 401) {
                        promise.emit('unauthorized');
                    } else if (error.status === 403) {
                        promise.emit('forbidden');
                    } else {
                        promise.emit('error');
                    }
                    reject(error);
                }
            );
        });

        ee(promise); // jshint ignore:line
        return promise;
    }

    /**
     * logout Alfresco API
     *
     * @returns A promise that returns {new authentication ticket} if resolved and {error} if rejected.
     */
    logout(): AlfrescoApiClientPromise<void> {
        this.saveUsername('');

        const contentTypes = ['application/json'];
        const accepts = ['application/json'];

        const promise: any = new Promise<void>((resolve, reject) => {
            this.callApi('/app/logout', 'GET', {}, {}, {}, {}, {}, contentTypes, accepts).then(
                () => {
                    this.invalidateSession();
                    promise.emit('logout');
                    resolve();
                },
                (error) => {
                    if (error.status === 401) {
                        promise.emit('unauthorized');
                    }
                    promise.emit('error');
                    reject(error);
                }
            );
        });

        ee(promise);
        return promise;
    }

    /**
     * Set the current Ticket
     *
     * @param ticket Ticket value
     */
    setTicket(ticket: string) {
        this.authentications.basicAuth.ticket = ticket;
        this.authentications.basicAuth.password = null;
        this.config.ticketBpm = ticket;
        this.storage.setItem('ticket-BPM', ticket);
        this.ticket = ticket;
    }

    invalidateSession() {
        this.storage.removeItem('ticket-BPM');
        this.authentications.basicAuth.ticket = null;
        this.authentications.basicAuth.password = null;
        this.authentications.basicAuth.username = null;
        this.config.ticketBpm = null;
        this.ticket = null;
    }

    /**
     * Get the current Ticket
     *
     * @returns ticket
     */
    getTicket(): string {
        return this.ticket;
    }

    /**
     * If the client is logged in return true
     *
     * @returns `true` if logged in, otherwise `false`
     */
    isLoggedIn(): boolean {
        return !!this.ticket;
    }

    /**
     * return the Authentication
     *
     * @returns authentication object
     */
    getAuthentication(): Authentication {
        return this.authentications;
    }
}