from __future__ import annotations

import types

import pytest

from ariadne.services.mailer import Mailer, MailerError


class DummySMTP:
    def __init__(self, host=None, port=None, timeout=None):
        self.calls = []
        self.message = None

    def __enter__(self):
        return self

    def __exit__(self, exc_type, exc, tb):
        return False

    def ehlo(self):
        self.calls.append("ehlo")

    def starttls(self):
        self.calls.append("starttls")

    def login(self, username, password):
        self.calls.append(("login", username, password))

    def send_message(self, message):
        self.message = message


def test_mailer_requires_host(monkeypatch) -> None:
    dummy = types.SimpleNamespace(
        smtp_host="",
        smtp_port=25,
        smtp_username="",
        smtp_password="",
        smtp_from="test@bstein.dev",
        smtp_starttls=False,
        smtp_use_tls=False,
        smtp_timeout_sec=5.0,
    )
    monkeypatch.setattr("ariadne.services.mailer.settings", dummy)

    svc = Mailer()
    with pytest.raises(MailerError):
        svc.send("subject", ["a@bstein.dev"], "body")


def test_send_welcome_calls_send(monkeypatch) -> None:
    dummy = types.SimpleNamespace(
        smtp_host="smtp",
        smtp_port=25,
        smtp_username="",
        smtp_password="",
        smtp_from="test@bstein.dev",
        smtp_starttls=False,
        smtp_use_tls=False,
        smtp_timeout_sec=5.0,
    )
    monkeypatch.setattr("ariadne.services.mailer.settings", dummy)

    svc = Mailer()
    called = {}

    def _send(subject, to_addrs, text_body, html_body=None):
        called["subject"] = subject
        called["to"] = to_addrs
        return types.SimpleNamespace(ok=True, detail="sent")

    monkeypatch.setattr(svc, "send", _send)
    svc.send_welcome("user@bstein.dev", "CODE", "https://bstein.dev/onboarding?code=CODE", username="user")
    assert called["subject"] == "Welcome to Titan Lab"


def test_mailer_send_uses_starttls(monkeypatch) -> None:
    dummy = types.SimpleNamespace(
        smtp_host="smtp",
        smtp_port=25,
        smtp_username="user",
        smtp_password="pass",
        smtp_from="test@bstein.dev",
        smtp_starttls=True,
        smtp_use_tls=False,
        smtp_timeout_sec=5.0,
    )
    monkeypatch.setattr("ariadne.services.mailer.settings", dummy)
    monkeypatch.setattr("ariadne.services.mailer.smtplib.SMTP", DummySMTP)

    svc = Mailer()
    result = svc.send("subject", ["a@bstein.dev"], "body", html_body="<p>hi</p>")
    assert result.ok is True


def test_mailer_send_uses_tls(monkeypatch) -> None:
    dummy = types.SimpleNamespace(
        smtp_host="smtp",
        smtp_port=465,
        smtp_username="user",
        smtp_password="pass",
        smtp_from="test@bstein.dev",
        smtp_starttls=False,
        smtp_use_tls=True,
        smtp_timeout_sec=5.0,
    )
    monkeypatch.setattr("ariadne.services.mailer.settings", dummy)
    monkeypatch.setattr("ariadne.services.mailer.smtplib.SMTP_SSL", DummySMTP)

    svc = Mailer()
    result = svc.send("subject", ["a@bstein.dev"], "body")
    assert result.ok is True


def test_mailer_send_raises_error(monkeypatch) -> None:
    dummy = types.SimpleNamespace(
        smtp_host="smtp",
        smtp_port=25,
        smtp_username="user",
        smtp_password="pass",
        smtp_from="test@bstein.dev",
        smtp_starttls=False,
        smtp_use_tls=False,
        smtp_timeout_sec=5.0,
    )
    monkeypatch.setattr("ariadne.services.mailer.settings", dummy)

    class BrokenSMTP(DummySMTP):
        def send_message(self, message):
            raise RuntimeError("boom")

    monkeypatch.setattr("ariadne.services.mailer.smtplib.SMTP", BrokenSMTP)
    svc = Mailer()
    with pytest.raises(MailerError):
        svc.send("subject", ["a@bstein.dev"], "body")