import { MediaKit, MediaItem } from '../../interfaces/interfaces.component';
import { UtilService } from '../util-service/util.service';
import { ComponentLinkService } from '../component-link-service/component-link.service';
import { IdGeneratorService } from '../id-generator.service';
import { PublicationService } from '../publication-service/publication.service';
import { Injectable } from '@angular/core';
import { ConstantsService } from 'src/app/shared/constants/constants.service';

@Injectable()
export class MediaKitService {

	constructor(private util: UtilService,
		private linkService: ComponentLinkService,
		private idService: IdGeneratorService,
		private publicationService: PublicationService,
		private constants: ConstantsService) { }

	buildQueryString(mediaKit: MediaKit): string {
		const pubPath = this.publicationService.getPublicationPath();
		const handlerUrl = `${this.constants.CONTENT_URL_PREFIX}${pubPath}/${this.constants.DOWNLOAD_ZIPFILE_HANDLER}`;
		let queryString = `${handlerUrl}?zipFilename=${mediaKit.zipFileName}.zip`;
		mediaKit.mediaItems.forEach(mediaItem => {
			if (!mediaItem.isVideo) {
				queryString += `&item=${mediaItem.componentId}-${mediaItem.fileName}`;
			}
		});
		return queryString.includes('item') ? queryString : '#';
	}

	nbrOfDownloadableItems(mediaKit: MediaKit): number {
		return mediaKit.mediaItems.filter(mk => !mk.isVideo).length;
	}

	parseMediaKit(json: any): MediaKit {
		const title = this.util.extract(json, 'Title');
		const buttonTitle = this.util.extract(json, 'ButtonTitle');
		const mediaItems = (this.util.extract(json, 'ImagesVideosDocuments') || []).map(e => this.parseMediaItem(e));
		const zipFileName = this.util.extract(json, 'DownloadedMediaKitTitlebuttonTitle');
		return {
			title: title,
			buttonTitle: buttonTitle,
			mediaItems: mediaItems,
			zipFileName: zipFileName
		};
	}

	private parseMediaItem(mediaItemJson): MediaItem {
		const url = this.linkService.getUrl(this.util.extract(mediaItemJson, 'MediaItem'));
		const title = this.util.extract(mediaItemJson, 'PresentationTitleForMediaItem') || '';

		const mediaItem = this.util.partiallyApplyExtract(mediaItemJson, 'MediaItem');
		const altText = mediaItem('Assetmetadata', 'Titlemm');
		const mimeType = mediaItem('MimeType') || mediaItem('Type') || '';
		const fileName = mediaItem('FileName');
		const componentId = mediaItem('Id');
		const filesize = this.util.formatFilesize(Number(mediaItem('FileSize')));
		const item = this.util.extract(mediaItemJson, 'MediaItem');

		// VidDisplay is a field from the youtube video, mimetype is set for MM videos and the akamai player has the type flag
		const isVideo = mediaItem('VidDisplay') || mimeType.startsWith('video') || mediaItem('Type') === 'akamaiplayer';

		return {
			title: title,
			size: filesize,
			url: url,
			altText: altText,
			mimeType: mimeType,
			id: this.idService.getId(),
			fileName: fileName,
			componentId: componentId,
			mediaItem: item,
			isVideo: isVideo
		};
	}
}