'use strict'

// todo: DRY with vbb tests
const tap = require('tap')

const isRoughlyEqual = require('is-roughly-equal')
const {DateTime} = require('luxon')
const flatMap = require('lodash/flatMap')

const createClient = require('../..')
const bvgProfile = require('../../p/bvg')
const products = require('../../p/bvg/products')
const createValidate = require('./lib/validate-fptf-with')
const {
	cfg,
	validateStation,
	validateLine,
	validateJourneyLeg,
	validateDeparture,
	validateMovement
} = require('./lib/vbb-bvg-validators')
const testJourneysStationToStation = require('./lib/journeys-station-to-station')
const testJourneysStationToAddress = require('./lib/journeys-station-to-address')
const testJourneysStationToPoi = require('./lib/journeys-station-to-poi')
const testJourneysWalkingSpeed = require('./lib/journeys-walking-speed')
const testEarlierLaterJourneys = require('./lib/earlier-later-journeys')
const testLegCycleAlternatives = require('./lib/leg-cycle-alternatives')
const testRefreshJourney = require('./lib/refresh-journey')
const journeysFailsWithNoProduct = require('./lib/journeys-fails-with-no-product')
const testDepartures = require('./lib/departures')
const testDeparturesInDirection = require('./lib/departures-in-direction')
const testArrivals = require('./lib/arrivals')
const testJourneysWithDetour = require('./lib/journeys-with-detour')
const testReachableFrom = require('./lib/reachable-from')

const when = cfg.when

const validate = createValidate(cfg, {
	station: validateStation,
	line: validateLine,
	journeyLeg: validateJourneyLeg,
	departure: validateDeparture,
	movement: validateMovement
})

const client = createClient(bvgProfile, 'public-transport/hafas-client:test')

const amrumerStr = '900000009101'
const spichernstr = '900000042101'
const bismarckstr = '900000024201'
const westhafen = '900000001201'
const wedding = '900000009104'
const württembergallee = '900000026153'
const tiergarten = '900000003103'
const jannowitzbrücke = '900000100004'

const hour = 60 * 60 * 1000

tap.test('journeys – Spichernstr. to Bismarckstr.', async (t) => {
	const res = await client.journeys(spichernstr, bismarckstr, {
		results: 4,
		departure: when,
		stopovers: true
	})

	await testJourneysStationToStation({
		test: t,
		res,
		validate,
		fromId: spichernstr,
		toId: bismarckstr
	})
	// todo: find a journey where there ticket info is always available

	t.end()
})

tap.test('journeys – only subway', async (t) => {
	const res = await client.journeys(spichernstr, bismarckstr, {
		results: 20,
		departure: when,
		products: {
			suburban: false,
			subway:   true,
			tram:     false,
			bus:      false,
			ferry:    false,
			express:  false,
			regional: false
		}
	})

	validate(t, res, 'journeysResult', 'res')

	t.ok(res.journeys.length > 1)
	for (let i = 0; i < res.journeys.length; i++) {
		const journey = res.journeys[i]
		for (let j = 0; j < journey.legs.length; j++) {
			const leg = journey.legs[j]

			const name = `res.journeys[${i}].legs[${j}].line`
			if (leg.line) {
				t.equal(leg.line.mode, 'train', name + '.mode is invalid')
				t.equal(leg.line.product, 'subway', name + '.product is invalid')
			}
			t.ok(journey.legs.some(l => l.line), name + '.legs has no subway leg')
		}
	}

	t.end()
})

tap.test('journeys – fails with no product', (t) => {
	journeysFailsWithNoProduct({
		test: t,
		fetchJourneys: client.journeys,
		fromId: spichernstr,
		toId: bismarckstr,
		when,
		products
	})
	t.end()
})

// BerlKönig for public use is suspended during COVID-19.
tap.skip('journeys – BerlKönig', async (t) => {
	const when = DateTime.fromMillis(Date.now(), {
		zone: 'Europe/Berlin',
		locale: 'de-De',
	}).startOf('day').plus({days: 1, hours: 18}).toISO()

	const {journeys} = await client.journeys({
		type: 'location',
		address: '12101 Berlin-Tempelhof, Peter-Str.r-Weg 1',
		latitude: 52.476283,
		longitude: 13.384947
	}, {
		type: 'location',
		id: '900981505',
		poi: true,
		name: 'Berlin, Tempelhofer Park Eingang Oderstr.',
		latitude: 52.476688,
		longitude: 13.41872
	}, {
		berlkoenig: true,
		departure: when
	})

	const withBerlkoenig = flatMap(journeys, j => j.legs)
	.find(l => l.line && l.line.product === 'berlkoenig')
	t.ok(withBerlkoenig, 'journey with BerlKönig not found')

	t.ok(withBerlkoenig.line)
	t.equal(withBerlkoenig.line.public, true)
	t.equal(withBerlkoenig.line.mode, 'taxi')
	t.equal(withBerlkoenig.line.product, 'berlkoenig')
	t.end()
})

// todo: opt.walkingSpeed doesn't seem to work right now
tap.skip('journeys: walkingSpeed', async (t) => {
	const havelchaussee = {
		type: 'location',
		address: 'Havelchaussee',
		latitude: 52.443576,
		longitude: 13.198973
	}
	const wannsee = '900000053301'

	await testJourneysWalkingSpeed({
		test: t,
		journeys: client.journeys,
		validate,
		from: havelchaussee,
		to: wannsee,
		products: {bus: false},
		minTimeDifference: 5 * 60 * 1000
	})
})

tap.test('earlier/later journeys', async (t) => {
	await testEarlierLaterJourneys({
		test: t,
		fetchJourneys: client.journeys,
		validate,
		fromId: spichernstr,
		toId: bismarckstr,
		when
	})

	t.end()
})

tap.test('journeys – leg cycle & alternatives', async (t) => {
	await testLegCycleAlternatives({
		test: t,
		fetchJourneys: client.journeys,
		fromId: tiergarten,
		toId: jannowitzbrücke
	})
	t.end()
})
tap.test('refreshJourney', async (t) => {
	await testRefreshJourney({
		test: t,
		fetchJourneys: client.journeys,
		refreshJourney: client.refreshJourney,
		validate,
		fromId: spichernstr,
		toId: bismarckstr,
		when
	})
	t.end()
})

tap.test('trip details', async (t) => {
	const res = await client.journeys(spichernstr, amrumerStr, {
		results: 1, departure: when
	})

	const p = res.journeys[0].legs.find(l => !l.walking)
	t.ok(p.tripId, 'precondition failed')
	t.ok(p.line.name, 'precondition failed')
	const trip = await client.trip(p.tripId, p.line.name, {when})

	validate(t, trip, 'trip', 'trip')
	t.end()
})

tap.test('journeys – station to address', async (t) => {
	const torfstr = {
		type: 'location',
		address: '13353 Berlin-Wedding, Torfstr. 17',
		latitude: 52.541797,
		longitude: 13.350042
	}
	const res = await client.journeys(spichernstr, torfstr, {
		results: 3,
		departure: when
	})

	await testJourneysStationToAddress({
		test: t,
		res,
		validate,
		fromId: spichernstr,
		to: torfstr
	})
	t.end()
})

tap.test('journeys – station to POI', async (t) => {
	const atze = {
		type: 'location',
		id: '900980720',
		poi: true,
		name: 'Berlin, Atze Musiktheater für Kinder',
		latitude: 52.543333,
		longitude: 13.351686
	}
	const res = await client.journeys(spichernstr, atze, {
		results: 3,
		departure: when
	})

	await testJourneysStationToPoi({
		test: t,
		res,
		validate,
		fromId: spichernstr,
		to: atze
	})
	t.end()
})

tap.test('journeys: via works – with detour', async (t) => {
	// Going from Westhafen to Wedding via Württembergalle without detour
	// is currently impossible. We check if the routing engine computes a detour.
	const res = await client.journeys(westhafen, wedding, {
		via: württembergallee,
		results: 1,
		departure: when,
		stopovers: true
	})

	await testJourneysWithDetour({
		test: t,
		res,
		validate,
		detourIds: [württembergallee]
	})
	t.end()
})

// todo: without detour test

tap.test('departures', async (t) => {
	const departures = await client.departures(spichernstr, {
		duration: 5, when
	})

	await testDepartures({
		test: t,
		departures,
		validate,
		id: spichernstr
	})
	t.end()
})

tap.test('departures with station object', async (t) => {
	const deps = await client.departures({
		type: 'station',
		id: spichernstr,
		name: 'U Spichernstr',
		location: {
			type: 'location',
			latitude: 1.23,
			longitude: 2.34
		}
	}, {when})

	validate(t, deps, 'departures', 'departures')
	t.end()
})

tap.test('departures at Spichernstr. in direction of Westhafen', async (t) => {
	await testDeparturesInDirection({
		test: t,
		fetchDepartures: client.departures,
		fetchTrip: client.trip,
		id: spichernstr,
		directionIds: [westhafen],
		when,
		validate
	})
	t.end()
})

tap.test('departures at 7-digit station', async (t) => {
	const eisenach = '8010097' // see derhuerst/vbb-hafas#22
	await client.departures(eisenach, {when})
	t.pass('did not fail')
	t.end()
})

tap.test('arrivals', async (t) => {
	const arrivals = await client.arrivals(spichernstr, {
		duration: 5, when
	})

	await testArrivals({
		test: t,
		arrivals,
		validate,
		id: spichernstr
	})
	t.end()
})

tap.test('nearby', async (t) => {
	const berlinerStr = '900000044201'
	const landhausstr = '900000043252'

	// Berliner Str./Bundesallee
	const nearby = await client.nearby({
		type: 'location',
		latitude: 52.4873452,
		longitude: 13.3310411
	}, {
		// Even though HAFAS reports Landhausstr. to be 179m, we have to pass way more here. 🙄
		distance: 600,
	})

	validate(t, nearby, 'locations', 'nearby')

	t.equal(nearby[0].id, berlinerStr)
	t.equal(nearby[0].name, 'U Berliner Str.')
	t.ok(nearby[0].distance > 0)
	t.ok(nearby[0].distance < 100)

	const res = nearby.find(s => s.id === landhausstr)
	t.ok(res, `Landhausstr. ${landhausstr} is not among the nearby stops`)
	t.equal(nearby[1].name, 'Landhausstr.')
	t.ok(nearby[1].distance > 100)
	t.ok(nearby[1].distance < 200)

	t.end()
})

tap.test('locations', async (t) => {
	const locations = await client.locations('Alexanderplatz', {results: 20})

	validate(t, locations, 'locations', 'locations')
	t.ok(locations.length <= 20)

	t.ok(locations.find(s => s.type === 'stop' || s.type === 'station'))
	t.ok(locations.find(s => s.poi)) // POIs
	t.ok(locations.find(s => !s.name && s.address)) // addresses

	t.end()
})

tap.test('stop', async (t) => {
	const s = await client.stop(spichernstr)

	validate(t, s, ['stop', 'station'], 'stop')
	t.equal(s.id, spichernstr)

	t.end()
})

tap.test('radar', async (t) => {
	const vehicles = await client.radar({
		north: 52.52411,
		west: 13.41002,
		south: 52.51942,
		east: 13.41709
	}, {
		duration: 5 * 60, when
	})

	validate(t, vehicles, 'movements', 'vehicles')
	t.end()
})

tap.test('reachableFrom', async (t) => {
	const torfstr17 = {
		type: 'location',
		address: '13353 Berlin-Wedding, Torfstr. 17',
		latitude: 52.541797,
		longitude: 13.350042
	}

	await testReachableFrom({
		test: t,
		reachableFrom: client.reachableFrom,
		address: torfstr17,
		when,
		maxDuration: 15,
		validate
	})
	t.end()
})
