import { NextResponse } from 'next/server'
import { db } from '@/lib/db'

export const dynamic = 'force-dynamic'

// GET /api/aos/finance — invoices with lines + company
export async function GET() {
  try {
    const invoices = await db.invoice.findMany({
      orderBy: { issueDate: 'desc' },
      include: { company: true, lines: true },
    })

    const total = invoices.filter((i) => i.status !== 'cancelled' && i.status !== 'storno').length
    const draft = invoices.filter((i) => i.status === 'draft').length
    const sent = invoices.filter((i) => i.status === 'sent').length
    const paid = invoices.filter((i) => i.status === 'paid').length
    const overdue = invoices.filter((i) => i.status === 'overdue').length
    const zugferdCount = invoices.filter((i) => i.zugferd).length
    const xrechnungCount = invoices.filter((i) => i.xrechnung).length
    const datevCount = invoices.filter((i) => i.datevExported).length
    const outstandingCents = invoices
      .filter((i) => i.status === 'sent' || i.status === 'overdue')
      .reduce((s, i) => s + i.grossCents, 0)

    return NextResponse.json({
      invoices,
      stats: { total, draft, sent, paid, overdue, zugferdCount, xrechnungCount, datevCount, outstandingCents },
    })
  } catch (err) {
    const msg = err instanceof Error ? err.message : 'internal server error'
    return NextResponse.json({ error: msg }, { status: 500 })
  }
}