import { mkdirSync, mkdtempSync, readdirSync, readFileSync, rmSync, statSync, writeFileSync } from 'node:fs'
import { tmpdir } from 'node:os'
import { join } from 'node:path'
import { buildStopIndex } from './build-stop-index.mjs'
import worker from '../worker/nta-proxy.js'

const tempDir = mkdtempSync(join(tmpdir(), 'tfi-live-g2-'))

try {
  await testStopIndexBuilder()
  await testWorkerDepartures()
  testToolkitMigration()
  testStopsJson()
  testNoLocalSecretBundled()
  console.log('Smoke tests passed')
} finally {
  rmSync(tempDir, { recursive: true, force: true })
}

async function testStopIndexBuilder() {
  const gtfsDir = join(tempDir, 'gtfs')
  mkdirSync(gtfsDir, { recursive: true })
  writeFileSync(join(gtfsDir, 'stops.txt'), 'stop_id,stop_code,stop_name,stop_lat,stop_lon\nS1,100,Main Street,53.1,-6.1\n')
  writeFileSync(join(gtfsDir, 'routes.txt'), 'route_id,route_short_name,route_long_name,route_type\nR1,46A,Route 46A,3\n')
  writeFileSync(join(gtfsDir, 'trips.txt'), 'route_id,service_id,trip_id\nR1,W,T1\n')
  writeFileSync(join(gtfsDir, 'stop_times.txt'), 'trip_id,arrival_time,departure_time,stop_id,stop_sequence\nT1,10:00:00,10:00:00,S1,1\n')

  const outputPath = join(tempDir, 'stops.json')
  await buildStopIndex(gtfsDir, outputPath)
  const payload = JSON.parse(readFileSync(outputPath, 'utf8'))
  assert(payload.stops?.[0]?.routes?.[0] === '46A', 'stop index should include route short name')
  assert(payload.stops?.[0]?.modes?.[0] === 'bus', 'stop index should infer bus mode')
}

async function testWorkerDepartures() {
  const nowSeconds = Math.floor(Date.now() / 1000)
  const feed = {
    entity: [
      {
        id: 'fresh',
        tripUpdate: {
          trip: { routeId: '46A', tripHeadsign: 'Dun Laoghaire' },
          stopTimeUpdate: [{ stopId: 'S1', departure: { time: nowSeconds + 300 } }],
        },
      },
      {
        id: 'stale',
        tripUpdate: {
          trip: { routeId: '46A', tripHeadsign: 'Past' },
          stopTimeUpdate: [{ stopId: 'S1', departure: { time: nowSeconds - 600 } }],
        },
      },
    ],
  }

  const cacheStore = new Map()
  globalThis.caches = {
    default: {
      match: async (request) => cacheStore.get(request.url),
      put: async (request, response) => {
        cacheStore.set(request.url, response)
      },
    },
  }
  globalThis.fetch = async () => Response.json(feed)

  const response = await worker.fetch(
    new Request('https://proxy.example/departures?stopId=S1'),
    { NTA_API_KEY: 'test' },
    { waitUntil: () => undefined },
  )
  assert(response.ok, 'worker departures response should be ok')
  const payload = await response.json()
  assert(payload.departures.length === 1, 'worker should filter stale departures')
  assert(payload.departures[0].route === '46A', 'worker should preserve route id')
}

function testNoLocalSecretBundled() {
  const key = process.env.NTA_API_KEY
  if (!key) {
    return
  }

  const matches = findFilesContaining(key, ['dist', 'src', 'worker', 'scripts', 'README.md', 'app.json'])
  assert(matches.length === 0, `local NTA_API_KEY must not be bundled or documented verbatim: ${matches.join(', ')}`)
}

function testStopsJson() {
  const payload = JSON.parse(readFileSync('public/stops.json', 'utf8'))
  assert(payload.stops?.length > 10_000, 'public/stops.json should contain the generated TFI stop index')
  assert(payload.stops.some((stop) => stop.name && stop.lat && stop.lon), 'stops should include names and coordinates')
}

function testToolkitMigration() {
  const source = readFileSync('src/main.ts', 'utf8')
  assert(source.includes("from 'even-toolkit/bridge'"), 'app should use Even toolkit bridge')
  assert(source.includes("from 'even-toolkit/glass-display-builders'"), 'glasses lists should use toolkit display builders')
  assert(source.includes("from 'even-toolkit/web/button'"), 'phone UI should use Even toolkit Button')
  assert(source.includes("from 'even-toolkit/web/list-item'"), 'phone lists should use Even toolkit ListItem')
  assert(source.includes("from 'even-toolkit/web/stat-grid'"), 'phone status grid should use Even toolkit StatGrid')
  assert(source.includes("from 'react-dom/client'"), 'phone UI should be rendered through React toolkit components')
  assert(!source.includes('createStartUpPageContainer'), 'app should not render glasses UI through raw startup containers')
  assert(!source.includes('new TextContainerUpgrade'), 'app should not update glasses UI through raw text upgrades')
  assert(!source.includes('document.createElement'), 'phone UI should not use hand-built DOM rendering')
  assert(!source.includes('innerHTML'), 'phone UI should not render raw HTML strings')
}

function findFilesContaining(needle, paths) {
  const matches = []
  for (const path of paths) {
    collectMatches(path, needle, matches)
  }
  return matches
}

function collectMatches(path, needle, matches) {
  const stats = statSync(path)
  if (stats.isDirectory()) {
    for (const entry of readdirSync(path)) {
      collectMatches(join(path, entry), needle, matches)
    }
    return
  }

  const content = readFileSync(path, 'utf8')
  if (content.includes(needle)) {
    matches.push(path)
  }
}

function assert(condition, message) {
  if (!condition) {
    throw new Error(message)
  }
}