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

import { XmlParser } from '../src/parser'
describe('pause and resume', () => {
	it('should properly parse a simple file.', function (done) {
		const xmlStream = fs.createReadStream('./test/TestFiles/item.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })
		const expectedData = [
			{
				$: { id: '1', test: 'hello' },
				subitem: [
					{ $: { sub: 'TESTING SUB' }, _: 'one' },
					{ $: { sub: '2' }, _: 'two' }
				]
			},
			{
				$: { id: '2' },
				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
			}
		]
		const actualData: string[] = []
		let dataEventCount = 0
		let isSetTimeoutHappened = true
		this.timeout(4000)
		parser.on('data', (data) => {
			actualData.push(data)
			parser.pause()
			should(isSetTimeoutHappened).equal(true)
			setTimeout(() => {
				parser.resume()
				isSetTimeoutHappened = true
			}, 1000)
			dataEventCount++
			isSetTimeoutHappened = false
		})

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

		parser.on('end', () => {
			// console.log('actualData=', actualData)
			// console.log('dataEventCount=', dataEventCount)
			should(actualData).deepEqual(expectedData)
			should(dataEventCount).equal(2)
			done()
		})
		xmlStream.pipe(parser)
	})

	it('should emit data events with 1sec interval between each using pause and resume.', function (done) {
		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })

		let dataEventCount = 0
		let isSetTimeoutHappened = true
		this.timeout(20000)
		parser.on('data', (data) => {
			parser.pause()
			should(isSetTimeoutHappened).equal(true)
			setTimeout(() => {
				parser.resume()
				isSetTimeoutHappened = true
			}, 1000)
			dataEventCount++
			isSetTimeoutHappened = false
		})

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

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