from __future__ import annotations
from pathlib import Path
from decimal import Decimal
from pycheval import EN16931Invoice, Money, generate_xml
from .models import Invoice
from .calc import compute_totals

def generate_facturx_xml(inv: Invoice, out_xml: Path, logger) -> Path:
    out_xml.parent.mkdir(parents=True, exist_ok=True)
    totals = compute_totals(inv)

    invoice = EN16931Invoice(
        invoice_number=inv.meta.invoice_number,
        invoice_date=inv.meta.invoice_date,
        currency=inv.meta.currency,
        grand_total=Money(str(Decimal(str(totals.gross_total)).quantize(Decimal("0.01"))), inv.meta.currency),
    )

    xml_string = generate_xml(invoice)
    out_xml.write_text(xml_string, encoding="utf-8")
    logger.info("Wrote Factur-X XML: %s", out_xml)
    return out_xml