from email import message_from_bytes
from email.policy import default

from inkwell import mail_templates
from inkwell.mailer import MailSettings, build_message

LINK = "https://notes.example.test/reset-password?token=abc-123"


def test_every_email_carries_its_link_in_both_parts():
    for email in (
        mail_templates.password_reset("Inkwell", "a@example.test", LINK),
        mail_templates.invite("Inkwell", "Sam", LINK, 7),
    ):
        assert LINK in email.text
        assert f'href="{LINK}"' in email.html


def test_text_from_settings_and_people_is_escaped_in_the_html():
    email = mail_templates.invite('<b>Ink</b> & "co"', "<script>x</script>", LINK, 1)
    assert "<script>" not in email.html
    assert "&lt;b&gt;Ink&lt;/b&gt; &amp;" in email.html
    # The text part is plain text, so it is left as written.
    assert "<script>x</script>" in email.text
    assert "within a day" in email.text


def test_the_html_fetches_nothing():
    """No remote images or fonts: the app sends with no outbound network, and a remote
    image in an email is a tracking pixel."""
    html = mail_templates.password_reset("Inkwell", "a@example.test", LINK).html
    assert "<img" not in html
    assert "src=" not in html
    assert "@import" not in html


def test_the_message_is_text_first_then_html():
    cfg = MailSettings("smtp.example.test", 587, "starttls", "", "", "inkwell@example.test", "https://x")
    msg = build_message(cfg, "a@example.test", mail_templates.test_message("Inkwell", "https://x"))
    parsed = message_from_bytes(msg.as_bytes(), policy=default)
    assert parsed.get_content_type() == "multipart/alternative"
    assert [p.get_content_type() for p in parsed.iter_parts()] == ["text/plain", "text/html"]
    assert parsed["Subject"] == "Inkwell test email"