from decimal import Decimal

from invoice_reconciler.normalize import normalize_amount, normalize_invoice_number


def test_invoice_number_preserved():
    assert normalize_invoice_number("  PW117330  ") == "PW117330"
    assert normalize_invoice_number("PW117330") == "PW117330"
    assert normalize_invoice_number("INV-100") == "INV-100"


def test_amount_currency_and_commas():
    assert normalize_amount("$1,234.50") == Decimal("1234.50")
    assert normalize_amount("1234.50") == Decimal("1234.50")
    assert normalize_amount("$8.58") == Decimal("8.58")


def test_negative_amounts():
    assert normalize_amount("($12.00)") == Decimal("-12.00")
    assert normalize_amount("-12.00") == Decimal("-12.00")


def test_blank_amount():
    assert normalize_amount("") is None
    assert normalize_amount(None) is None
    assert normalize_amount("N/A") is None