from unittest import mock

import pytest
from fansifter_common.adapters.stripo.exceptions import StripoClientError

from app.exceptions import EmailSendError
from app.handler import _build_email_send
from app.models import AutomatedEmail, Domain

from tests.unit.helpers import create_model


@pytest.mark.db
def test_uses_compressed_content_when_present(
    stripo_client_mock: mock.MagicMock,
    ows_account_client_mock: mock.MagicMock,
) -> None:
    domain = create_model(Domain)
    automated_email = create_model(
        AutomatedEmail,
        domain_id=domain.id,
        compressed_content="<precompressed/>",
    )
    ows_account_client_mock.get_vendor.return_value = mock.MagicMock(
        vendor_id=1, name="vendor", brand="SME"
    )

    result = _build_email_send(
        automated_email_id=automated_email.id,
        automated_email_trigger_id="trig-1",
        confirmation_id=None,
    )

    assert result.html_content == "<precompressed/>"
    stripo_client_mock.compress.assert_not_called()


@pytest.mark.db
def test_falls_back_to_compress_when_compressed_is_null(
    stripo_client_mock: mock.MagicMock,
    ows_account_client_mock: mock.MagicMock,
) -> None:
    domain = create_model(Domain)
    automated_email = create_model(
        AutomatedEmail,
        domain_id=domain.id,
        compressed_content=None,
        html_content="<html/>",
        css_content="p{}",
    )
    ows_account_client_mock.get_vendor.return_value = mock.MagicMock(
        vendor_id=1, name="vendor", brand="SME"
    )
    stripo_client_mock.compress.return_value = "<just-compressed/>"

    result = _build_email_send(
        automated_email_id=automated_email.id,
        automated_email_trigger_id="trig-1",
        confirmation_id=None,
    )

    assert result.html_content == "<just-compressed/>"
    stripo_client_mock.compress.assert_called_once_with(html="<html/>", css="p{}")


@pytest.mark.db
def test_raises_when_stripo_fallback_fails(
    stripo_client_mock: mock.MagicMock,
) -> None:
    domain = create_model(Domain)
    automated_email = create_model(
        AutomatedEmail, domain_id=domain.id, compressed_content=None
    )
    stripo_client_mock.compress.side_effect = StripoClientError("boom")

    with pytest.raises(EmailSendError) as exc_info:
        _build_email_send(
            automated_email_id=automated_email.id,
            automated_email_trigger_id="trig-1",
            confirmation_id=None,
        )

    assert isinstance(exc_info.value.__cause__, StripoClientError)
    assert "Failed to compress" in str(exc_info.value)


@pytest.mark.db
def test_raises_when_css_missing() -> None:
    domain = create_model(Domain)
    automated_email = create_model(
        AutomatedEmail,
        domain_id=domain.id,
        compressed_content=None,
        css_content=None,
    )

    with pytest.raises(EmailSendError, match="Email content is missing."):
        _build_email_send(
            automated_email_id=automated_email.id,
            automated_email_trigger_id="trig-1",
            confirmation_id=None,
        )