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

import { XmlParser } from '../src/parser'
describe('Parse function should work properly', () => {
	it('should properly parse a simple file.', (done) => {
		const xml = fs.readFileSync('./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' }]
			}
		]

		parser.parse(xml.toString(), (err, data) => {
			if (err) {
				done(err)
			}
			should(data).deepEqual(expectedData)
			done()
		})
	})

	it('should properly parse a medium size file.', (done) => {
		const xml = fs.readFileSync('./test/TestFiles/medium.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })

		parser.parse(xml, (err, data) => {
			if (err) {
				done(err)
			}
			should(data.length).equal(10)
			done()
		})
	})

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

		parser.parse(xml, (err, data) => {
			if (err) {
				done(err)
			}
			should(data.length).equal(296)
			done()
		})
	})

	it('should properly parse a xml simple file in which nodes contain text values randomly.', (done) => {
		const xml = fs.readFileSync('./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' }]
			}
		]

		parser.parse(xml, (err, data) => {
			if (err) {
				done(err)
			}
			should(data).deepEqual(expectedData)
			should(data.length).equal(2)
			done()
		})
	})

	it('should properly parse a huge file.', (done) => {
		const xml = fs.readFileSync('./test/TestFiles/hugeFile.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })
		// console.log(parser)
		parser.parse(xml, (err, data) => {
			if (err) {
				done(err)
			}
			should(data.length).equal(2072)
			done()
		})
	})

	it('should properly return error if the xml file is corrupted.', (done) => {
		const xml = fs.readFileSync('./test/TestFiles/corrupted.xml')
		const parser = new XmlParser({ resourcePath: '/items/item' })

		parser.parse(xml, (err, data) => {
			// console.log(err)
			should(err.message).equal('mismatched tag at line no: 12')
			should(data).not.be.ok()
			done()
		})
	})
})