'use server'

import { createClient } from '@/lib/supabase/server'
import { revalidatePath } from 'next/cache'
import { InvoicePDF } from '@/components/invoice-pdf'
import { renderToBuffer } from '@react-pdf/renderer'
import React from 'react'
import { buildCustomerSnapshot, buildOrderSnapshot } from '@/lib/license-transform'
import type { Category, Order, Product, Profile, WizardSelections } from '@/lib/types'

// ─── submitOrder ──────────────────────────────────────────────────────────────

/**
 * Speichert eine abgeschlossene Bestellung als versionierten Snapshot in der DB,
 * generiert die PDF-Rechnung und lädt sie in den Supabase Storage hoch.
 */
export async function submitOrder(params: {
  selections: WizardSelections
  products: Product[]
  categories: Category[]
  customerProfile: Partial<Profile>
}): Promise<Order> {
  const { selections, products, categories, customerProfile } = params
  const supabase = await createClient()

  const { data: { user } } = await supabase.auth.getUser()
  if (!user) throw new Error('Not authenticated')

  // 1. Snapshots aufbauen
  const customerSnapshot = buildCustomerSnapshot(customerProfile)
  const orderSnapshot = buildOrderSnapshot(selections, products, categories)

  // 2. Bestellung in DB schreiben
  const { data: order, error: orderError } = await supabase
    .from('orders')
    .insert([{
      user_id: user.id,
      total_price: orderSnapshot.total,
      customer_data: customerSnapshot,
      order_data: orderSnapshot,
      status: 'pending',
    }])
    .select()
    .single()

  if (orderError) throw orderError

  // 3. PDF generieren (greift auf Snapshot-Daten zu, nicht auf Live-Katalog)
  try {
    const buffer = await renderToBuffer(
      React.createElement(InvoicePDF, {
        order,
        customer: customerSnapshot,
        orderSnapshot,
      })
    )

    // 4. PDF in Supabase Storage hochladen
    const fileName = `invoice_${order.id}.pdf`
    const { error: uploadError } = await supabase
      .storage
      .from('invoices')
      .upload(fileName, buffer, { contentType: 'application/pdf', upsert: true })

    if (uploadError) {
      console.error('PDF Upload Error:', uploadError)
    } else {
      const { data: publicUrlData } = supabase.storage.from('invoices').getPublicUrl(fileName)
      await supabase.from('orders').update({ pdf_url: publicUrlData.publicUrl }).eq('id', order.id)
    }
  } catch (pdfError) {
    console.error('PDF Generation Error:', pdfError)
  }

  revalidatePath('/protected')
  return order as Order
}