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

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

describe('Basic behavior', () => {
	it('should properly parse a simple file.', (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

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

		parser.on('error', (err) => {
			should(err).not.be.ok()
			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 properly parse a medium size file.', (done) => {
		const xmlStream = fs.createReadStream('./test/TestFiles/medium.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })

		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(parser)
	})

	it('should properly parse a file containing many nodes.', (done) => {
		const xmlStream = fs.createReadStream('./test/TestFiles/manyItems.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })

		let dataEventCount = 0

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

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

		parser.on('end', () => {
			// console.log('dataEventCount=', dataEventCount)
			should(dataEventCount).equal(296)
			done()
		})
		xmlStream.pipe(parser)
	})

	it('should properly parse a xml simple file in which nodes contain text values randomly.', (done) => {
		const xmlStream = fs.createReadStream('./test/TestFiles/randomText.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })
		const expectedData = [
			{
				$: { id: '1', test: 'hello' },
				_: 'item one two',
				subitem: [
					{ $: { sub: 'TESTING SUB' }, _: 'one' },
					{ $: { sub: '2' }, _: 'two' }
				]
			},
			{
				$: { id: '2' },
				_: 'item one two three four',
				subitem: [{ _: 'three' }, { _: 'four' }, { _: 'five' }]
			}
		]
		const actualData: string[] = []
		let dataEventCount = 0

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

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

		parser.on('end', () => {
			// console.log('actualData=', JSON.stringify(actualData, null, 1))
			// console.log('dataEventCount=', dataEventCount)
			should(actualData).deepEqual(expectedData)
			should(dataEventCount).equal(2)
			done()
		})
		xmlStream.pipe(parser)
	})

	it('should properly parse a huge file.', (done) => {
		const xmlStream = fs.createReadStream('./test/TestFiles/hugeFile.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })
		// console.log(parser)
		let dataEventCount = 0
		parser.on('data', (data) => {
			dataEventCount++
		})

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

		parser.on('end', () => {
			// console.log('dataEventCount=', dataEventCount)
			should(dataEventCount).equal(2072)
			done()
		})
		xmlStream.pipe(parser)
	})
})