from django.conf import settings
from django.core.mail import EmailMessage

from cmsmanage.email import TemplatedMultipartEmail
from membershipworks.models import EventInvoice


class InvoiceEmailBase(TemplatedMultipartEmail):
    from_email = "CMS Invoices <invoices@claremontmakerspace.org>"
    reply_to = ["Claremont MakerSpace <Info@ClaremontMakerSpace.org>"]


class InstructorInvoiceEmail(InvoiceEmailBase):
    template = "membershipworks/email/event_invoice_instructor.dj.html"

    @property
    def subject(self) -> str:
        event = self.context["invoice"].event
        return f'Your CMS instructor invoice has been received for event "{event}" {event.start} - {event.end}'

    @classmethod
    def render_for_invoice(
        cls, invoice: EventInvoice, pdf: bytes, event_url: str
    ) -> EmailMessage:
        if invoice.event.instructor is None or invoice.event.instructor.member is None:
            raise ValueError("Event Instructor not defined or is not member")
        message = cls.render(
            {"invoice": invoice, "event_url": event_url},
            to=[invoice.event.instructor.member.sanitized_mailbox()],
        )
        message.attach(f"CMS_event_invoice_{invoice.uuid}.pdf", pdf, "application/pdf")
        return message


class AdminInvoiceEmail(InvoiceEmailBase):
    template = "membershipworks/email/event_invoice_admin.dj.html"

    @property
    def subject(self) -> str:
        event = self.context["invoice"].event
        return f'CMS instructor invoice created for event "{event}" {event.start} - {event.end}'

    @classmethod
    def render_for_invoice(
        cls, invoice: EventInvoice, pdf: bytes, event_url: str
    ) -> EmailMessage:
        message = cls.render(
            {"invoice": invoice, "event_url": event_url},
            # TODO: should this be in database instead?
            to=settings.INVOICE_HANDLERS,
        )
        message.attach(f"CMS_event_invoice_{invoice.uuid}.pdf", pdf, "application/pdf")
        return message


def make_invoice_emails(
    invoice: EventInvoice, pdf: bytes, event_url: str
) -> list[EmailMessage]:
    return [
        InstructorInvoiceEmail.render_for_invoice(invoice, pdf, event_url),
        AdminInvoiceEmail.render_for_invoice(invoice, pdf, event_url),
    ]