"""Email in integration tests: every email is a queued row the outbox sends
(#5506), so a test catches what the mail server would have been handed by
replacing the one SMTP conversation, outbox.deliver_sync."""
from __future__ import annotations

from email.message import EmailMessage


def capture(app, monkeypatch, answer=None) -> list[EmailMessage]:
    """Set a mail server and collect every message the outbox delivers.
    `answer(msg)` is the server's reply to each (None: accepted)."""
    from steward.core import outbox
    sent: list[EmailMessage] = []

    def deliver(cfg, messages):
        sent.extend(messages)
        return [answer(m) if answer else None for m in messages]

    app.config["SMTP"] = {**app.config.get("SMTP", {}), "host": "mx.example", "port": 587,
                          "from": "steward@example.com"}
    monkeypatch.setattr(outbox, "deliver_sync", deliver)
    return sent


def to(sent: list[EmailMessage], *addresses: str) -> list[EmailMessage]:
    """The messages among `sent` addressed to any of `addresses` (other
    tests' queued email can go out in the same tick)."""
    want = {a.lower() for a in addresses}
    return [m for m in sent if m["To"].lower() in want]