/*!
 * @license
 * Copyright 2016 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 { Response } from '@angular/http';
import { Observable } from 'rxjs/Rx';
import { NodePaging, MinimalNodeEntity } from './../models/document-library.model';
import {
    AlfrescoSettingsService,
    AlfrescoAuthenticationService,
    AlfrescoContentService
} from 'ng2-alfresco-core';

declare let AlfrescoApi: any;

@Injectable()
export class DocumentListService {

    static DEFAULT_MIME_TYPE_ICON: string = 'ft_ic_miscellaneous.svg';

    mimeTypeIcons: any = {
        'image/png': 'ft_ic_raster_image.svg',
        'image/jpeg': 'ft_ic_raster_image.svg',
        'image/gif': 'ft_ic_raster_image.svg',
        'application/pdf': 'ft_ic_pdf.svg',
        'application/vnd.ms-excel': 'ft_ic_ms_excel.svg',
        'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet': 'ft_ic_ms_excel.svg',
        'application/vnd.openxmlformats-officedocument.spreadsheetml.template': 'ft_ic_ms_excel.svg',
        'application/msword': 'ft_ic_ms_word.svg',
        'application/vnd.openxmlformats-officedocument.wordprocessingml.document': 'ft_ic_ms_word.svg',
        'application/vnd.openxmlformats-officedocument.wordprocessingml.template': 'ft_ic_ms_word.svg',
        'application/vnd.ms-powerpoint': 'ft_ic_ms_powerpoint.svg',
        'application/vnd.openxmlformats-officedocument.presentationml.presentation': 'ft_ic_ms_powerpoint.svg',
        'application/vnd.openxmlformats-officedocument.presentationml.template': 'ft_ic_ms_powerpoint.svg',
        'application/vnd.openxmlformats-officedocument.presentationml.slideshow': 'ft_ic_ms_powerpoint.svg',
        'video/mp4': 'ft_ic_video.svg',
        'text/plain': 'ft_ic_document.svg',
        'application/x-javascript': 'ft_ic_document.svg',
        'application/json': 'ft_ic_document.svg',
        'image/svg+xml': 'ft_ic_vector_image.svg',
        'text/html': 'ft_ic_website.svg',
        'application/x-compressed': 'ft_ic_archive.svg',
        'application/x-zip-compressed': 'ft_ic_archive.svg',
        'application/zip': 'ft_ic_archive.svg',
        'application/vnd.apple.keynote': 'ft_ic_presentation.svg',
        'application/vnd.apple.pages': 'ft_ic_document.svg',
        'application/vnd.apple.numbers': 'ft_ic_spreadsheet.svg'
    };

    constructor(
        private settings: AlfrescoSettingsService,
        private authService: AlfrescoAuthenticationService,
        private contentService: AlfrescoContentService
    ) {
    }

    private getAlfrescoClient() {
        return AlfrescoApi.getClientWithTicket(this.settings.getApiBaseUrl(), this.authService.getToken());
    }

    private getNodesPromise(folder: string) {
        let alfrescoClient = this.getAlfrescoClient();
        let apiInstance = new AlfrescoApi.Core.NodesApi(alfrescoClient);
        let nodeId = '-root-';
        let opts = {
            relativePath: folder,
            include: ['path']
        };
        return apiInstance.getNodeChildren(nodeId, opts);
    }
    deleteNode(nodeId: string) {
        let client = this.getAlfrescoClient();
        let nodesApi = new AlfrescoApi.Core.NodesApi(client);
        let opts = {};
        return Observable.fromPromise(nodesApi.deleteNode(nodeId, opts));
    }

    /**
     * Gets the folder node with the content.
     * @param folder Path to folder.
     * @returns {Observable<NodePaging>} Folder entity.
     */
    getFolder(folder: string): Observable<NodePaging> {
        return Observable.fromPromise(this.getNodesPromise(folder))
            .map(res => <NodePaging> res)
            // .do(data => console.log('Node data', data)) // eyeball results in the console
            .catch(this.handleError);
    }

    /**
     * Get thumbnail URL for the given document node.
     * @param node Node to get URL for.
     * @returns {string} URL address.
     */
    getDocumentThumbnailUrl(node: MinimalNodeEntity): string {
        if (node && this.contentService) {
            return this.contentService.getDocumentThumbnailUrl(node);
        }
        return null;
    }

    getMimeTypeIcon(mimeType: string): string {
        let icon = this.mimeTypeIcons[mimeType];
        return icon || DocumentListService.DEFAULT_MIME_TYPE_ICON;
    }

    private handleError(error: Response) {
        // in a real world app, we may send the error to some remote logging infrastructure
        // instead of just logging it to the console
        console.error(error);
        return Observable.throw(error || 'Server error');
    }
}