import sys
import types
from services import brief_service
from services.brief_service import brief_repository


def _install_fake_resend(monkeypatch):
    fake = types.ModuleType('resend')
    fake.api_key = None
    calls = []

    class _Emails:
        @staticmethod
        def send(payload):
            calls.append(payload)

    fake.Emails = _Emails
    monkeypatch.setitem(sys.modules, 'resend', fake)
    return calls


def test_send_weekly_brief_renders_and_sends(monkeypatch):
    # MockBriefRepository keeps its own in-memory tenant store, seeded
    # explicitly (it isn't wired to tenant_repository's mock store).
    brief_repository.seed_tenant('t1', {'email': 'pm@gadventures.com', 'name': 'G Adventures'})
    calls = _install_fake_resend(monkeypatch)

    brief_service.send_weekly_brief('t1')

    assert len(calls) == 1
    assert calls[0]['to'] == 'pm@gadventures.com'
    assert 'Bettersight' in calls[0]['html']
    assert list(brief_repository._logs.values())[-1]['status'] == 'sent'


def test_send_weekly_brief_skips_when_no_admin_email(monkeypatch):
    calls = _install_fake_resend(monkeypatch)
    # 'unknown-tenant' was never seeded — get_weekly_data returns admin_email=None.
    brief_service.send_weekly_brief('unknown-tenant')
    assert calls == []


def test_send_weekly_brief_logs_failure_when_resend_raises(monkeypatch):
    brief_repository.seed_tenant('t2', {'email': 'pm@gadventures.com', 'name': 'G Adventures'})

    def _raise(payload):
        raise RuntimeError('resend api down')

    fake = types.ModuleType('resend')
    fake.api_key = None
    fake.Emails = type('Emails', (), {'send': staticmethod(_raise)})
    monkeypatch.setitem(sys.modules, 'resend', fake)

    # Must not raise — a failed send is a side-effect failure only.
    brief_service.send_weekly_brief('t2')

    assert list(brief_repository._logs.values())[-1]['status'] == 'failed'