import { test, after } from 'node:test'
import assert from 'node:assert/strict'
import os from 'node:os'
import path from 'node:path'
import { mkdtempSync } from 'node:fs'
import { startAppwriteMock } from './support/appwriteMock.js'
import { startFakeStripe } from './support/fakeStripe.js'
import { useTestEnv } from './support/testEnv.js'
import { schemaKeys } from './support/schema.js'

// Waechter der Kundenansicht: Ablauf nach 2 h, Verwechslungsschutz (X-Kundenansicht), Schreibsperre ausser News
process.env.NEWS_UPLOAD_DIR = mkdtempSync(path.join(os.tmpdir(), 'kundenansicht-guard-'))
const aw = await startAppwriteMock({
  schema: {
    customerViewLog: schemaKeys('customerViewLog'),
    portalFeatures: schemaKeys('portalFeatures'),
    newsPosts: schemaKeys('newsPosts'),
  },
})
const st = await startFakeStripe()
useTestEnv({ appwriteUrl: aw.url, stripeUrl: st.url })
const { config } = await import('../server/config.js')
const { startTestApp } = await import('./support/testApp.js')
const { seedFixtures, customerCookie, kundenansichtCookie, viewAsCookie } = await import('./support/fixtures.js')
const { kundenansichtGuard, KUNDENANSICHT_ALLOWED } = await import('../server/middleware/kundenansichtGuard.js')
const { createStaffPreviewToken } = await import('../server/services/staffPreviewTokens.js')

// Kunden-Router mit denselben Mount-Pfaden wie server/index.js
const MOUNTS = [
  ['/api/auth', (await import('../server/routes/auth.js')).default],
  ['/api/projects', (await import('../server/routes/projects.js')).default],
  ['/api/features', (await import('../server/routes/features.js')).default],
  ['/api/news', (await import('../server/routes/news.js')).default],
  ['/api', (await import('../server/routes/customerData.js')).default],
  ['/api/chat', (await import('../server/routes/chat.js')).default],
  ['/api/abo/takeover-credits', (await import('../server/routes/takeoverCredits.js')).default],
  ['/api/abo', (await import('../server/routes/abo.js')).default],
  ['/api/funktionen', (await import('../server/routes/funktionen.js')).default],
  ['/api/termine', (await import('../server/routes/termine.js')).default],
]
// Oeffentliche Schnittstelle (ohne Session) wie in server/index.js hinter dem Waechter; nicht in MOUNTS, weil sie keine Kunden-Route ist
const oeffentlich = (await import('../server/routes/publicTermine.js')).default
const app = await startTestApp({ '/': kundenansichtGuard, ...Object.fromEntries(MOUNTS), '/api/public/termine/v1': oeffentlich })
after(() => Promise.all([app.close(), aw.close(), st.close()]))

seedFixtures(aw)
aw.seed('customerPortalAccess', { $id: 'pa1', customerId: 'c1', enabled: true })
aw.seed('websiteProjects', { $id: 'p1', customerId: 'c1', projectName: 'Bäckerei', liveDomain: 'baeckerei.de' })
aw.seed('portalFeatures', { $id: 'f_p1_news', customerId: 'c1', projectId: 'p1', featureKey: 'news', state: 'active', enabled: true, siteKey: 'abcdefghijklmnop' })

const VIEW = 'a'.repeat(32)
const note = { projectId: 'p1', type: 'note', title: 'Hallo', text: 'Wir haben offen', paper: 'sun', duration: '1m' }
const kv = (extra = {}) => ({ cookie: kundenansichtCookie(extra), headers: { 'x-kundenansicht': extra.viewId || VIEW } })

async function call(method, url, { cookie, headers = {}, body } = {}) {
  const res = await fetch(app.url + url, {
    method,
    redirect: 'manual',
    headers: { ...(cookie ? { cookie } : {}), ...(body !== undefined ? { 'content-type': 'application/json' } : {}), ...headers },
    body: body === undefined ? undefined : JSON.stringify(body),
  })
  const text = await res.text()
  let parsed = text
  try {
    parsed = text ? JSON.parse(text) : null
  } catch {
    /* Text-Antwort */
  }
  return { status: res.status, body: parsed, headers: res.headers }
}

/** Alle nicht-lesenden Routen der Router (router.stack), :param durch 'x' ersetzt. */
function writeRoutes(mounts) {
  const routes = []
  for (const [prefix, router] of mounts) {
    for (const layer of router.stack) {
      if (!layer.route) continue
      for (const method of Object.keys(layer.route.methods)) {
        if (['get', 'head', 'options', '_all'].includes(method)) continue
        const sub = String(layer.route.path).replace(/:[A-Za-z]+/g, 'x')
        routes.push({ method: method.toUpperCase(), path: `${prefix === '/api' ? '/api' : prefix}${sub === '/' ? '' : sub}` || '/' })
      }
    }
  }
  return routes
}
const allowed = (method, p) => KUNDENANSICHT_ALLOWED.some(([m, re]) => m === method && re.test(p))
const logEntries = () => [...aw.docs('customerViewLog').values()]
// geloeschtes Cookie: Ablauf 1970 (ein signiertes behaelt dabei einen leeren signierten Wert "s:.<sig>")
const clears = (res, name) => res.headers.getSetCookie().some((c) => c.startsWith(`${name}=`) && /Expires=Thu, 01 Jan 1970/.test(c))

test('jede Schreib-Route ausserhalb der Erlaubnisliste -> 403 view_blocked', async () => {
  const routes = writeRoutes(MOUNTS)
  assert.ok(routes.length >= 25, `nur ${routes.length} Schreib-Routen gefunden`)
  let checked = 0
  for (const { method, path: p } of routes) {
    if (allowed(method, p)) continue
    const res = await call(method, p, kv())
    assert.equal(res.status, 403, `${method} ${p}`)
    assert.equal(res.body.code, 'view_blocked', `${method} ${p}`)
    checked += 1
  }
  assert.ok(checked >= 18, `nur ${checked} gesperrte Routen geprueft`)
})

test('Erlaubnisliste: genau News, Terminplaner, Analyse-Link, Ende, Logout und Login', () => {
  const ok = [
    ['POST', '/api/news'], ['POST', '/api/news/image'], ['PATCH', '/api/news/abc'], ['DELETE', '/api/news/abc'],
    ['POST', '/api/funktionen/analyse/heatmap-link'], ['POST', '/api/auth/kundenansicht/ende'],
    ['POST', '/api/auth/logout'], ['POST', '/api/auth/login'],
    ['POST', '/api/termine/buchungen'], ['POST', '/api/termine/buchungen/abc/aktion'], ['POST', '/api/termine/ressourcen/abc/feed'],
    ['PATCH', '/api/termine/einstellungen'], ['PATCH', '/api/termine/einstellungen/'],
    ['DELETE', '/api/termine/buchungen/abc'], ['DELETE', '/api/termine/buchungen/abc/'],
  ]
  for (const [m, p] of ok) assert.ok(allowed(m, p), `${m} ${p}`)
  assert.equal(KUNDENANSICHT_ALLOWED.length, 8 + 3, 'genau drei Termine-Eintraege dazu')
  for (const [m, p] of [
    ['POST', '/api/chat/read'], ['POST', '/api/news/abc'], ['POST', '/api/auth/password'], ['POST', '/api/abo/checkout'], ['POST', '/api/funktionen/news/checkout'],
    // Terminplaner: nur der eigene Pfad, nur diese Methoden und Formen
    ['POST', '/api/termineX'], ['POST', '/api/termineX/buchungen'], ['POST', '/api/termine'], ['POST', '/api/termine/'],
    ['PUT', '/api/termine/einstellungen'], ['PATCH', '/api/termine/buchungen/abc'], ['PATCH', '/api/termine/einstellungen/x'],
    ['DELETE', '/api/termine/einstellungen'], ['DELETE', '/api/termine/buchungen'], ['DELETE', '/api/termine/buchungen/abc/def'],
    ['DELETE', '/api/termine/ressourcen/abc'], ['PUT', '/api/termine/buchungen/abc'],
  ]) {
    assert.ok(!allowed(m, p), `${m} ${p}`)
  }
})

test('POST /api/chat/read ist gesperrt (Lesestatus bleibt unberuehrt)', async () => {
  const res = await call('POST', '/api/chat/read', kv())
  assert.equal(res.status, 403)
})

test('News anlegen in der Kundenansicht erlaubt', async () => {
  const res = await call('POST', '/api/news', { ...kv(), body: note })
  assert.equal(res.status, 201)
})

test('fremde Kennung -> 409 view_replaced mit Kundennamen, auch beim Lesen', async () => {
  const res = await call('GET', '/api/projects', { cookie: kundenansichtCookie(), headers: { 'x-kundenansicht': 'b'.repeat(32) } })
  assert.equal(res.status, 409)
  assert.deepEqual([res.body.code, res.body.kunde], ['view_replaced', 'Kunde Eins'])
})

test('Schreiben ohne Kennung -> 409, Lesen ohne Kennung -> erlaubt', async () => {
  const write = await call('POST', '/api/news', { cookie: kundenansichtCookie(), body: note })
  assert.equal(write.status, 409)
  assert.equal(write.body.code, 'view_replaced')
  const read = await call('GET', '/api/news?projectId=p1', { cookie: kundenansichtCookie() })
  assert.equal(read.status, 200)
})

test('genau bei viewExpiresAt abgelaufen: 401, Cookies geloescht, Protokoll abgelaufen genau einmal', async (t) => {
  const at = Date.now()
  t.mock.method(Date, 'now', () => at)
  const viewId = 'e'.repeat(32)
  const opts = kv({ viewId, viewExpiresAt: at })
  const before = logEntries().filter((d) => d.action === 'abgelaufen').length
  const first = await call('GET', '/api/projects', opts)
  const second = await call('POST', '/api/news', { ...opts, body: note })
  for (const res of [first, second]) {
    assert.equal(res.status, 401)
    assert.equal(res.body.code, 'view_expired')
    assert.equal(res.body.error, 'Die Kundenansicht ist abgelaufen. Bitte im Ticketsystem erneut öffnen.')
    assert.ok(clears(res, config.cookieName), 'Portal-Cookie geloescht')
    assert.ok(clears(res, 'preview_session'), 'Preview-Cookie geloescht')
  }
  const expired = logEntries().filter((d) => d.action === 'abgelaufen')
  assert.equal(expired.length, before + 1)
  assert.deepEqual([expired.at(-1).customerId, expired.at(-1).staffName], ['c1', 'Andrej'])
})

test('alte Ansicht ohne viewId (frueheres Admin-Panel): Lesen, Schreiben, Logout 401 view_expired, Cookies weg, kein Protokoll', async () => {
  const cookie = viewAsCookie('c1')
  const before = logEntries().length
  for (const [method, p, body] of [['GET', '/api/news?projectId=p1'], ['POST', '/api/news', note], ['POST', '/api/auth/logout']]) {
    const res = await call(method, p, { cookie, body })
    assert.equal(res.status, 401, `${method} ${p}`)
    assert.equal(res.body.code, 'view_expired', `${method} ${p}`)
    assert.ok(clears(res, config.cookieName), `${method} ${p}: Portal-Cookie geloescht`)
  }
  assert.equal(logEntries().length, before)
})

test('normale Kunden-Sitzung wird nicht beruehrt (News anlegen 201 ohne Header)', async () => {
  const res = await call('POST', '/api/news', { cookie: customerCookie('c1'), body: note })
  assert.equal(res.status, 201)
})

test('abgelaufenes Cookie blockiert weder /api/auth/me noch das Einloesen eines neuen Links', async () => {
  const cookie = kundenansichtCookie({ viewExpiresAt: Date.now() - 1000 })
  assert.equal((await call('GET', '/api/auth/me', { cookie })).status, 200)
  const token = createStaffPreviewToken({
    purpose: 'kundenansicht',
    customerId: 'c1',
    staff: { role: 'admin', isAdmin: false, appwriteUserId: 'u_staff2', name: 'Andrej', email: 'andrej@webklar.com' },
  })
  const res = await call('GET', `/api/auth/kundenansicht?token=${token}`, { cookie })
  assert.equal(res.status, 302)
  assert.equal(res.headers.get('location'), '/dashboard.html')
})

// Abschluss-Review: Express routet ohne Ruecksicht auf Gross-/Kleinschreibung, der Waechter muss das auch
test('Grossschreibung umgeht den Waechter nicht: /API/... wie /api/...', async () => {
  const routes = writeRoutes(MOUNTS).filter(({ method, path: p }) => !allowed(method, p))
  for (const { method, path: p } of routes) {
    const upper = p.replace(/^\/api\//, '/API/')
    const res = await call(method, upper, kv())
    assert.equal(res.status, 403, `${method} ${upper}`)
  }
  const legacy = await call('POST', '/API/news', { cookie: viewAsCookie('c1'), body: note })
  assert.equal(legacy.status, 401)
  const expired = await call('GET', '/Api/Projects', kv({ viewExpiresAt: Date.now() - 1000 }))
  assert.equal(expired.status, 401)
})

test('Tab mit Kennung, Cookie ist keine Kundenansicht mehr -> 409 statt fremder Daten', async () => {
  const header = { 'x-kundenansicht': VIEW }
  const res = await call('GET', '/api/projects', { cookie: customerCookie('c2'), headers: header })
  assert.equal(res.status, 409)
  assert.deepEqual([res.body.code, res.body.kunde], ['view_replaced', 'Kunde Zwei'])
  // alte Ansicht ohne Kennung: beendet, ebenfalls keine fremden Daten
  assert.equal((await call('GET', '/api/projects', { cookie: viewAsCookie('c2'), headers: header })).status, 401)
  // ohne Cookie: kein fremder Kunde, die Route antwortet selbst mit 401
  assert.equal((await call('GET', '/api/projects', { headers: header })).status, 401)
})

// Terminplaner (Aufgabe 16): Gaeste buchen ohne Sitzung; ein Kundenansicht-Cookie im selben Browser (Mitarbeiter testet die
// Website des Kunden) darf ihre POSTs weder sperren noch beenden
test('/api/public/ ist ausgenommen: Kundenansicht-Cookie sperrt oeffentliche POSTs nicht und beendet keine Ansicht', async (t) => {
  const vorher = config.termine.minAntwortMs
  config.termine.minAntwortMs = 0 // sonst wartet jede Buchungsantwort 300 ms
  t.after(() => (config.termine.minAntwortMs = vorher))
  const url = '/api/public/termine/v1/abcdefghijklmnop/buchungen'
  const faelle = [
    ['Kundenansicht mit Kennung', kv()],
    ['Kundenansicht ohne Kennung (sonst 409)', { cookie: kundenansichtCookie() }],
    ['fremde Kennung (sonst 409)', { cookie: kundenansichtCookie(), headers: { 'x-kundenansicht': 'b'.repeat(32) } }],
    ['abgelaufene Ansicht (sonst 401)', kv({ viewExpiresAt: Date.now() - 1000 })],
    ['alte Ansicht ohne viewId (sonst 401)', { cookie: viewAsCookie('c1') }],
  ]
  for (const [was, opts] of faelle) {
    for (const pfad of [url, url.replace('/api/public/', '/API/Public/')]) {
      const res = await call('POST', pfad, { ...opts, body: {} })
      assert.equal(res.status, 200, `${was} ${pfad}`)
      assert.deepEqual(res.body, { aktiv: false }, `${was} ${pfad}`) // Modus off: die Schnittstelle antwortet selbst
      assert.equal(clears(res, config.cookieName), false, `${was}: das Portal-Cookie bleibt`)
    }
  }
  // ausserhalb von /api/public/ bleibt die Sperre
  assert.equal((await call('POST', '/api/chat/read', kv())).status, 403)
})