from django.contrib import admin
from django.contrib.admin.sites import NotRegistered


def patch_invoice_admin():
    """
    Load the invoice admin stack in a safe order and remove the invalid
    date_hierarchy setting injected by the communications plugin.
    """
    try:
        from oscar.core.loading import get_model

        import oscar_invoices.admin  # noqa: F401

        from ocyan.plugin.oscar_communications.oscar_invoices_extension.admin import (
            InvoiceAdmin,
        )
    except ImportError:
        return

    Invoice = get_model("oscar_invoices", "Invoice")
    InvoiceAdmin.date_hierarchy = None

    try:
        admin.site.unregister(Invoice)
    except NotRegistered:
        pass
    admin.site.register(Invoice, InvoiceAdmin)