from odoo.tests.common import TransactionCase
from unittest.mock import patch, MagicMock
import caldav
from icalendar import Calendar, Event
from datetime import datetime
import logging

_logger = logging.getLogger(__name__)


class TestCaldavSync(TransactionCase):

    def setUp(self):
        super(TestCaldavSync, self).setUp()
        self.user = self.env['res.users'].create({
            'name': 'Test User',
            'login': 'testuser',
            'caldav_calendar_url': 'http://test.calendar.url',
            'caldav_username': 'testuser',
            'caldav_password': 'password',
        })
        self.env = self.env(context=dict(self.env.context, no_reset_password=True))

    @patch('odoo.addons.caldav_sync.models.calendar_event.CalendarEvent._get_caldav_client')
    def test_create_caldav_event(self, mock_get_caldav_client):
        mock_client = MagicMock()
        mock_calendar = MagicMock()

        def add_event_side_effect(ical_event):
            caldav_event = MagicMock()
            cal = Calendar.from_ical(ical_event)
            ical_event_instance = next(iter(cal.subcomponents))
            caldav_event.vobject_instance.vevent.uid.value = ical_event_instance['UID']
            return caldav_event

        mock_calendar.add_event.side_effect = add_event_side_effect
        mock_get_caldav_client.return_value = mock_client
        mock_client.calendar.return_value = mock_calendar

        event_data = {
            'name': 'Test Event',
            'start': '2024-05-22 10:00:00',
            'stop': '2024-05-22 11:00:00',
            'description': '<p>This is a test event</p>',
            'location': 'Test Location',
        }

        event = self.env['calendar.event'].with_user(self.user).create(event_data)

        cal = Calendar.from_ical(mock_calendar.add_event.call_args[0][0])
        ical_event = next(iter(cal.subcomponents))

        self.assertEqual(str(ical_event.get('summary')), event_data['name'])
        self.assertEqual(str(ical_event.get('location')), event_data['location'])
        self.assertEqual(ical_event.get('description'), event_data['description'])
        self.assertIsNotNone(event.caldav_uid)
        self.assertEqual(event.caldav_uid, ical_event['UID'])

    @patch('odoo.addons.caldav_sync.models.calendar_event.CalendarEvent._get_caldav_client')
    @patch('odoo.addons.caldav_sync.models.calendar_event.CalendarEvent.sync_update_to_caldav')
    def test_update_caldav_event(self, mock_sync_update_to_caldav, mock_get_caldav_client):
        mock_client = MagicMock()
        mock_calendar = MagicMock()
        mock_event = MagicMock()
        mock_event.id = 'test-uid-12345'

        mock_client.calendar.return_value = mock_calendar
        mock_calendar.add_event.return_value = mock_event
        mock_get_caldav_client.return_value = mock_client

        event = self.env['calendar.event'].with_user(self.user).create({
            'name': 'Test Event',
            'start': '2024-05-22 10:00:00',
            'stop': '2024-05-22 11:00:00',
            'description': 'This is a test event',
            'location': 'Test Location',
            'create_uid': self.user.id,
        })

        event.with_user(self.user).write({
            'name': 'Updated Test Event',
            'start': '2024-05-22 12:00:00',
            'stop': '2024-05-22 13:00:00',
        })
        mock_sync_update_to_caldav.assert_called_once()

        self.assertEqual(event.name, 'Updated Test Event')
        self.assertEqual(event.start, datetime(2024, 5, 22, 12, 0))

    @patch('odoo.addons.caldav_sync.models.calendar_event.CalendarEvent._get_caldav_client')
    def test_delete_caldav_event(self, mock_get_caldav_client):
        mock_client = MagicMock()
        mock_calendar = MagicMock()
        mock_event = MagicMock()

        mock_client.calendar.return_value = mock_calendar
        mock_calendar.object_by_uid.return_value = mock_event
        mock_get_caldav_client.return_value = mock_client

        event = self.env['calendar.event'].with_user(self.user).create({
            'name': 'Test Event',
            'start': '2024-05-22 10:00:00',
            'stop': '2024-05-22 11:00:00',
            'description': 'This is a test event',
            'location': 'Test Location',
            'create_uid': self.user.id,
        })
        uid = event.caldav_uid
        event.with_user(self.user).unlink()

        mock_calendar.object_by_uid.assert_called_once_with(uid)
        mock_event.delete.assert_called_once()

    @patch('odoo.addons.caldav_sync.models.calendar_event.CalendarEvent.sync_event_from_ical')
    def test_poll_caldav_server(self, mock_sync_event_from_ical):
        mock_sync_event_from_ical.return_value = None
        with patch('caldav.DAVClient') as MockClient:
            mock_client = MockClient.return_value
            mock_calendar = mock_client.calendar.return_value
            mock_event = MagicMock()

            # Create a Calendar object and add an Event to it
            cal = Calendar()
            event = Event()
            event.add('uid', 'test-uid-12345')
            event.add('dtstamp', datetime(2024, 5, 22, 10, 0, 0))
            event.add('dtstart', datetime(2024, 5, 22, 10, 0, 0))
            event.add('dtend', datetime(2024, 5, 22, 11, 0, 0))
            event.add('summary', 'Polled Event')
            event.add('description', 'This event was polled from CalDAV')
            event.add('location', 'Polled Location')
            cal.add_component(event)

            # Set the mock event's icalendar_instance to the iCal string
            mock_event.icalendar_instance = Calendar.from_ical(cal.to_ical())
            mock_calendar.events.return_value = [mock_event]

            self.env['calendar.event'].poll_caldav_server()
            mock_sync_event_from_ical.assert_called_once()

    @patch('odoo.addons.caldav_sync.models.calendar_event._logger')
    def test_poll_caldav_server_with_exception(self, mock_logger):
        with patch('caldav.DAVClient') as MockClient:
            mock_client = MockClient.return_value
            mock_client.calendar.side_effect = Exception('Invalid credentials')

            self.env['calendar.event'].poll_caldav_server()
            mock_logger.error.assert_any_call('Failed to poll CalDAV server for user Test User: Invalid credentials')