import asyncio
from types import SimpleNamespace
from unittest.mock import MagicMock, patch

import pytest


class TestNextSleepSeconds:
    def test_uses_shortest_enabled_source_interval_without_db_query(self):
        from app.main import _next_sleep_seconds

        slow = SimpleNamespace(polling_interval=30)
        fast = SimpleNamespace(polling_interval=5)

        with patch("app.main.SessionLocal") as mock_session:
            result = _next_sleep_seconds(enabled_sources=[slow, fast])

        assert result == 300
        mock_session.assert_not_called()

    def test_respects_min_sleep(self):
        from app.main import _next_sleep_seconds

        source = SimpleNamespace(polling_interval=1)

        assert _next_sleep_seconds(min_sleep=120, enabled_sources=[source]) == 120

    def test_queries_database_when_sources_not_supplied(self):
        from app.main import _next_sleep_seconds

        source = SimpleNamespace(polling_interval=2)
        mock_db = MagicMock()
        mock_db.query.return_value.filter.return_value.all.return_value = [source]

        with patch("app.main.SessionLocal", return_value=mock_db):
            result = _next_sleep_seconds()

        assert result == 120
        mock_db.close.assert_called_once()

    def test_database_exception_falls_back_to_one_hour(self):
        from app.main import _next_sleep_seconds

        with patch("app.main.SessionLocal", side_effect=RuntimeError("db unavailable")):
            assert _next_sleep_seconds() == 3600


def test_poll_single_imap_source_passes_configured_folder():
    from app.main import _poll_single_imap_source

    source = SimpleNamespace(
        id=1,
        server="imap.example.com",
        port=993,
        username="u",
        password="p",
        folder="Junk Mail",
    )
    db = MagicMock()
    db.query.return_value.get.return_value = source
    results = {
        "success": True,
        "processed": 0,
        "reports_found": 0,
        "new_domains": [],
    }

    with (
        patch("app.main.SessionLocal", return_value=db),
        patch("app.main.IMAPClient") as mock_client_cls,
        patch("app.main.record_import_attempt"),
    ):
        mock_client_cls.return_value.fetch_reports.return_value = results

        _poll_single_imap_source(source)

    mock_client_cls.assert_called_once_with(
        server="imap.example.com",
        port=993,
        username="u",
        password="p",
        folder="Junk Mail",
        db=db,
    )
    db.commit.assert_called_once()
    db.close.assert_called_once()


@pytest.mark.asyncio
async def test_scheduled_imap_polling_sleep_exception_falls_back_then_cancels():
    from app.main import scheduled_imap_polling

    with (
        patch("app.main._poll_all_enabled_sources", return_value=[]),
        patch("app.main._next_sleep_seconds", return_value=60),
        patch(
            "app.main.asyncio.sleep",
            side_effect=[RuntimeError("sleep failed"), asyncio.CancelledError()],
        ),
    ):
        await scheduled_imap_polling()