import React from "react";
import copy from "../../common/data/copy.json";
import { parse } from 'json2csv'
import { downloadAsFile } from "../../common/utilities"

export class DownloadButton extends React.Component {
	onDownload(format, domain) {
		let filename = `ukr-civharm-${this.datetimeToDateString(new Date())}`;
		if (format === "csv") {
			let outputData = this.getCsvData(domain)
			downloadAsFile(`${filename}.csv`, outputData);
		} else if (format === "json") {
			let outputData = this.getJsonData(domain)
			downloadAsFile(`${filename}.json`, outputData);
		}
	}
	getCsvData(domain) {
		const { events, sources } = domain;
		const exportEvents = events.map(e => {
			return {
				id: e.civId,
				date: this.datetimeToDateString(e.datetime),
				latitude: e.latitude,
				longitude: e.longitude,
				location: e.location,
				description: e.description,
				sources: e.sources.map(s => sources[s].paths[0]).join(","),
				associations: e.associations.map(a => a.filter_paths.join("=")).join(",")
			}
		})
		return parse(exportEvents, { flatten: true })
	}
	getJsonData(domain) {
		const { events, sources } = domain;
		const exportEvents = events.map(e => {
			return {
				id: e.civId,
				date: this.datetimeToDateString(e.datetime),
				latitude: e.latitude,
				longitude: e.longitude,
				location: e.location,
				description: e.description,
				sources: e.sources.map(id => {
					const s = sources[id]
					return {
						id,
						path: s.paths[0],
						description: s.description
					}
				}),
				filters: e.associations.map(a => {
					return {
						key: a.filter_paths[0],
						value: a.filter_paths[1]
					}
				})
			}
		});
		return JSON.stringify(exportEvents);
	}
	datetimeToDateString(datetime) {
		try {
			return datetime.toISOString().split("T")[0]
		} catch (_) { }
		return "";
	}
	render() {
		const { language, domain, format } = this.props;
		const textByFormat = copy[language].toolbar.download.panel.formats[format]
		return (
			<div className="download-row">
				<span
					className="download-button"
					key={`download-${format}`}
					onClick={() => this.onDownload(format, domain)}
				>
					<i className="material-icons">{"download"}</i>
					<span className="tab-caption">{textByFormat.label}</span>
				</span>
				<span className="download-description">{textByFormat.description}</span>
			</div>
		);
	}
}