import { Router } from 'express'
import { config } from '../config.js'
import { getDocument } from '../services/appwriteAdmin.js'
import { getSessionCustomerId, requireSession } from '../middleware/session.js'
import { createFeatureCheckout } from '../services/stripeBilling.js'
import { assertOwnProject, getFeatureDoc, listCustomerFeatures, markOrdered, runActivation } from '../services/siteFeatures.js'

const router = Router()
const DAY_MS = 24 * 60 * 60 * 1000

function fail(res, err) {
  const status = err.status >= 400 && err.status < 600 ? err.status : 500
  return res.status(status).json({ error: err.message || 'Interner Serverfehler' })
}

// Zustaende der Funktionen je Projekt; geschlossene Einrichtungs-Tickets dieses Kunden werden vorher freigeschaltet
router.get('/', requireSession, async (req, res) => {
  try {
    const customerId = getSessionCustomerId(req)
    await runActivation({ customerId })
    res.json({ projects: await listCustomerFeatures(customerId), setupEstimate: config.funktionen.setupEstimate })
  } catch (err) {
    fail(res, err)
  }
})

router.post('/news/checkout', requireSession, async (req, res) => {
  try {
    if (req.session.viewAs) {
      return res.status(403).json({ error: 'Im "Als Kunde ansehen"-Modus kann nicht bestellt werden.' })
    }
    const { projectId, consent } = req.body || {}
    if (consent !== true) {
      return res.status(400).json({ error: 'Bitte stimme der Erklärung zu, um zu bestellen.' })
    }
    if (typeof projectId !== 'string' || !projectId) {
      return res.status(400).json({ error: 'Bitte wähle ein Projekt.' })
    }
    const customerId = getSessionCustomerId(req)
    await assertOwnProject(customerId, projectId)
    // Zustand vor dem Stripe-Aufruf pruefen: bezahlt/aktiv oder eine noch gueltige offene Bestellung -> 409
    const existing = await getFeatureDoc(customerId, projectId, 'news')
    const freshOrder = existing?.state === 'ordered' && Date.now() - new Date(existing.orderedAt || 0).getTime() < DAY_MS
    if (existing?.state === 'setup' || existing?.state === 'active' || freshOrder) {
      return res.status(409).json({ error: 'Die News-Pinnwand ist für dieses Projekt schon bestellt.' })
    }
    const customer = await getDocument(config.collections.customers, customerId)
    const now = new Date().toISOString()
    const session = await createFeatureCheckout(customer, { projectId, key: 'news', consentAt: now })
    await markOrdered({
      customerId,
      projectId,
      key: 'news',
      sessionId: session.id,
      consent: { text: config.funktionen.consentText, at: now, ip: req.ip, userAgent: req.get('user-agent') },
    })
    res.json({ url: session.url })
  } catch (err) {
    fail(res, err)
  }
})

export default router