import fs from 'fs'
import 'mocha'
import should from 'should'
import stream from 'stream'
import zlib from 'zlib'

import { XmlParser } from '../src/parser'

describe('should properly handle uncompressed files', () => {
	it('should properly parse a uncompressed xml file.', (done) => {
		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })
		const gzip = zlib.createGzip()
		const gunzip = zlib.createGunzip()
		let dataEventCount = 0

		parser.on('data', (data) => {
			dataEventCount++
		})

		parser.on('error', (err) => {
			done(err)
		})

		parser.on('end', () => {
			// console.log('dataEventCount=', dataEventCount)
			should(dataEventCount).equal(10)
			done()
		})
		xmlStream.pipe(gzip).pipe(gunzip).pipe(parser)
	})

	it('should properly parse uncompressed file and go fine with pause and resume.', function (done) {
		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })
		const gzip = zlib.createGzip()
		const gunzip = zlib.createGunzip()

		let dataEventCount = 0
		let isSetTimeoutHappened = true
		this.timeout(20000)
		parser.on('data', (data) => {
			parser.pause()
			should(isSetTimeoutHappened).equal(true)
			setTimeout(() => {
				parser.resume()
				isSetTimeoutHappened = true
			}, 2000)
			dataEventCount++
			isSetTimeoutHappened = false
		})

		parser.on('error', (err) => {
			done(err)
		})

		parser.on('end', () => {
			// console.log('dataEventCount=', dataEventCount)
			should(dataEventCount).equal(10)
			done()
		})
		xmlStream.pipe(gzip).pipe(gunzip).pipe(parser)
	})
})