from pathlib import Path

from pve_backup_report.config import EmailConfig
from pve_backup_report.email_report import (
    build_report_message,
    EmailReportError,
    message_id_domain,
    send_report_email,
    send_test_email,
)


def test_build_report_message_attaches_pdf(tmp_path: Path) -> None:
    pdf_path = tmp_path / "rapport.pdf"
    pdf_path.write_bytes(b"%PDF-1.7")
    config = EmailConfig(
        enabled=True,
        smtp_host="smtp.example.invalid",
        smtp_from="report@example.invalid",
        smtp_to=("admin@example.invalid",),
        subject="Rapport PVE",
    )

    message = build_report_message(config, pdf_path)

    assert message["Subject"] == "Rapport PVE"
    assert message["From"] == "report@example.invalid"
    assert message["To"] == "admin@example.invalid"
    assert message["Date"]
    assert message["Message-ID"].endswith("@example.invalid>")
    assert message["Auto-Submitted"] == "auto-generated"
    attachments = list(message.iter_attachments())
    assert len(attachments) == 1
    assert attachments[0].get_filename() == "rapport.pdf"
    assert attachments[0].get_content_type() == "application/pdf"
    assert attachments[0].get_payload(decode=True) == b"%PDF-1.7"


def test_message_id_domain_uses_sender_domain() -> None:
    assert message_id_domain("PVE Report <pve@example.invalid>") == "example.invalid"
    assert message_id_domain("pve@example.invalid") == "example.invalid"
    assert message_id_domain("invalid") is None
    assert message_id_domain(None) is None


def test_send_test_email_builds_message_without_attachment(monkeypatch) -> None:
    sent = []
    config = EmailConfig(
        enabled=True,
        smtp_host="smtp.example.invalid",
        smtp_from="report@example.invalid",
        smtp_to=("admin@example.invalid",),
        subject="Rapport PVE",
    )

    monkeypatch.setattr(
        "pve_backup_report.email_report.send_email_message",
        lambda email_config, message: sent.append((email_config, message)),
    )

    send_test_email(config)

    assert sent[0][0] == config
    message = sent[0][1]
    assert message["Subject"] == "[TEST] Rapport PVE"
    assert message["To"] == "admin@example.invalid"
    assert list(message.iter_attachments()) == []


def test_send_test_email_requires_enabled_config() -> None:
    config = EmailConfig(
        enabled=False,
        smtp_host="smtp.example.invalid",
        smtp_from="report@example.invalid",
        smtp_to=("admin@example.invalid",),
    )

    try:
        send_test_email(config)
    except EmailReportError as exc:
        assert "REPORT_EMAIL_ENABLED=false" in str(exc)
    else:
        raise AssertionError("EmailReportError attendu")


def test_send_report_email_uses_starttls_and_auth(tmp_path: Path, monkeypatch) -> None:
    pdf_path = tmp_path / "rapport.pdf"
    pdf_path.write_bytes(b"%PDF-1.7")
    calls = []

    class FakeSmtp:
        def __init__(self, host: str, port: int, timeout: int) -> None:
            calls.append(("connect", host, port, timeout))

        def __enter__(self):
            return self

        def __exit__(self, exc_type, exc, traceback) -> None:
            calls.append(("close",))

        def starttls(self) -> None:
            calls.append(("starttls",))

        def login(self, username: str, password: str) -> None:
            calls.append(("login", username, password))

        def send_message(self, message) -> None:
            calls.append(("send", message["To"]))

    monkeypatch.setattr("pve_backup_report.email_report.smtplib.SMTP", FakeSmtp)
    config = EmailConfig(
        enabled=True,
        smtp_host="smtp.example.invalid",
        smtp_port=587,
        smtp_username="report@example.invalid",
        smtp_password="secret",
        smtp_from="report@example.invalid",
        smtp_to=("admin@example.invalid",),
        smtp_starttls=True,
        smtp_timeout_seconds=12,
    )

    send_report_email(config, pdf_path)

    assert calls == [
        ("connect", "smtp.example.invalid", 587, 12),
        ("starttls",),
        ("login", "report@example.invalid", "secret"),
        ("send", "admin@example.invalid"),
        ("close",),
    ]