from signing_service.domain.ports.pdf_signer import PDFSignerPort


class FakePDFSigner(PDFSignerPort):
    """
    Fake implementation of PDFSignerPort.
    It does NOT sign a real PDF.
    It only simulates the behavior for testing and development.
    """

    def sign(self, pdf_bytes: bytes, certificate: str, password: str) -> bytes:
        # Simulación simple:
        # añadimos un marcador para indicar "firmado"
        signature_marker = f"\n\n-- Signed with certificate: {certificate} and password: {password}".encode()

        return pdf_bytes + signature_marker