/*!
 * @license
 * Copyright 2019 Alfresco Software, Ltd.
 *
 * 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 { Injectable } from '@angular/core';
import {
    AlfrescoApiCompatibility,
    ContentApi,
    Node, NodesApi
} from '@alfresco/js-api';
import { ReplaySubject, Subject } from 'rxjs';

@Injectable({
    providedIn: 'root'
})
export class ExternalAlfrescoApiService {

    /**
     * Publish/subscribe to events related to node updates.
     */
    nodeUpdated = new Subject<Node>();

    alfrescoApiInitialized: ReplaySubject<boolean> = new ReplaySubject(1);

    protected alfrescoApi: AlfrescoApiCompatibility;
    _nodesApi: NodesApi;

    getInstance(): AlfrescoApiCompatibility {
        return this.alfrescoApi;
    }

    get contentApi(): ContentApi {
        return this.getInstance().content;
    }

    get nodesApi(): NodesApi {
        this._nodesApi = this._nodesApi ?? new NodesApi(this.getInstance());
        return this._nodesApi;
    }

    init(ecmHost: string, contextRoot: string) {

        const domainPrefix = this.createPrefixFromHost(ecmHost);

        const config = {
            provider: 'ECM',
            hostEcm: ecmHost,
            authType: 'BASIC',
            contextRoot,
            domainPrefix
        };
        this.initAlfrescoApi(config);
        this.alfrescoApiInitialized.next(true);
    }

    protected initAlfrescoApi(config) {
        if (this.alfrescoApi) {
            this.alfrescoApi.configureJsApi(config);
        } else {
            this.alfrescoApi = new AlfrescoApiCompatibility(config);
        }
    }

    private createPrefixFromHost(url: string): string {
        const match = url.match(/:\/\/(www[0-9]?\.)?(.[^/:]+)/i);
        let result = null;
        if (match != null && match.length > 2 && typeof match[2] === 'string' && match[2].length > 0) {
            result = match[2];
        }
        return result;
    }
}