from types import SimpleNamespace
from unittest import mock

from django.test import TestCase, override_settings
from telebot import types

from . import interfaces
from .dispatcher import handle_update
from .interfaces import Interface, command, register, state, text
from .models import Bot, Chat, Message, User
from .testing import FakeApi, message_update


@register
class EchoInterface(Interface):
	title = 'Echo'

	@command('start')
	@text('меню')
	def menu(self, ctx):
		ctx.reset()
		ctx.reply('menu', keyboard=[['ask']])

	@text('ask')
	def ask(self, ctx):
		ctx.state = 'await_name'
		ctx.reply('name?')

	@text('отмена', state='await_name')
	def cancel_name(self, ctx):
		ctx.state = ''
		ctx.reply('cancelled')

	@text('отмена')
	def cancel(self, ctx):
		ctx.reply('nothing to cancel')

	@state('await_name')
	def name(self, ctx):
		ctx.data['name'] = ctx.text
		ctx.state = ''
		ctx.reply(f'hi {ctx.text}')

	def fallback(self, ctx):
		ctx.reply(f'echo {ctx.text}')


@register
class ChildInterface(EchoInterface):
	@command('start')
	def child_start(self, ctx):
		ctx.reply('child')


def member_update(update_id, status):
	return types.Update.de_json({
		'update_id': update_id,
		'my_chat_member': {
			'chat': {'id': -100, 'type': 'group', 'title': 'group'},
			'from': {'id': 7, 'is_bot': False, 'first_name': 'Ann'},
			'date': 0,
			'old_chat_member': {'user': {'id': 1, 'is_bot': True, 'first_name': 'bot'}, 'status': 'left'},
			'new_chat_member': {'user': {'id': 1, 'is_bot': True, 'first_name': 'bot'}, 'status': status},
		},
	})


class DispatcherTests(TestCase):
	def setUp(self):
		self.api = FakeApi()
		self.bot = Bot.objects.create(token='1:test', interface=interfaces.key(EchoInterface))

	def send(self, text, update_id=1, **kwargs):
		handle_update(self.api, self.bot, message_update(update_id, text, **kwargs))
		return self.api.last_text

	def test_command_text_state_fallback(self):
		self.assertEqual(self.send('/start'), 'menu')
		self.assertEqual(self.send('ask'), 'name?')
		self.assertEqual(self.send('Bob'), 'hi Bob')
		self.assertEqual(self.send('whatever'), 'echo whatever')
		self.assertEqual(Chat.objects.get().data, {'name': 'Bob'})

	def test_state_button_has_priority(self):
		self.assertEqual(self.send('отмена'), 'nothing to cancel')
		self.send('ask')
		self.assertEqual(self.send('отмена'), 'cancelled')
		self.assertEqual(Chat.objects.get().state, '')

	def test_global_button_works_in_state(self):
		self.send('ask')
		self.assertEqual(self.send('меню'), 'menu')

	def test_command_with_bot_name_and_args(self):
		self.assertEqual(self.send('/START@my_bot payload'), 'menu')

	def test_saves_user_chat_and_messages(self):
		self.send('/start')
		user = User.objects.get()
		self.assertEqual((user.tg_id, user.username), (7, 'user7'))
		chat = Chat.objects.get()
		self.assertEqual((chat.chat_id, chat.user, chat.type), (42, user, 'private'))
		self.assertEqual(
			list(Message.objects.order_by('pk').values_list('direction', 'text')),
			[('in', '/start'), ('out', 'menu')],
		)

	def test_ignores_group_messages(self):
		self.assertIsNone(self.send('/start', chat_type='group'))
		self.assertFalse(Message.objects.exists())

	def test_interface_switch_applies_immediately(self):
		self.bot.interface = interfaces.key(ChildInterface)
		self.assertEqual(self.send('/start'), 'child')
		self.assertEqual(self.send('меню'), 'menu')

	def test_no_interface(self):
		self.bot.interface = ''
		self.assertIsNone(self.send('/start'))
		self.assertEqual(Message.objects.count(), 1)

	def test_membership_marks_chat_deleted(self):
		handle_update(self.api, self.bot, member_update(1, 'member'))
		self.assertIsNone(Chat.objects.get().deleted_at)
		handle_update(self.api, self.bot, member_update(2, 'kicked'))
		self.assertIsNotNone(Chat.objects.get().deleted_at)
		self.assertEqual(Chat.objects.count(), 1)


class PublishTests(TestCase):
	def setUp(self):
		self.bot = Bot.objects.create(token='1:test')
		self.api = mock.Mock()
		self.api.get_me.return_value = SimpleNamespace(username='my_bot', first_name='My')

	def publish(self):
		with mock.patch.object(Bot, 'api', return_value=self.api), \
				mock.patch('Telegram.models.log_out_from_cloud') as log_out:
			self.bot.publish()
		return log_out

	@override_settings(TELEGRAM_API_URL='http://127.0.0.1:8081')
	def test_logs_out_from_cloud_once(self):
		self.assertEqual(self.publish().call_count, 1)
		self.bot.refresh_from_db()
		self.assertTrue(self.bot.cloud_logged_out)
		self.assertTrue(self.bot.is_active)
		self.assertEqual(self.bot.username, 'my_bot')
		self.assertEqual(self.publish().call_count, 0)

	@override_settings(TELEGRAM_API_URL='')
	def test_cloud_api_without_log_out(self):
		self.assertEqual(self.publish().call_count, 0)
		self.assertFalse(self.bot.cloud_logged_out)


class InterfaceRegistryTests(TestCase):
	def test_registered_interfaces_are_choices(self):
		self.assertIn((interfaces.key(EchoInterface), 'Echo'), interfaces.choices())

		class Unregistered(Interface):
			pass

		self.assertIsNone(interfaces.get(interfaces.key(Unregistered)))


class AdminTests(TestCase):
	def test_bot_admin_pages(self):
		from django.contrib.auth import get_user_model
		admin = get_user_model().objects.create_superuser('root', 'secret-pass-123')
		self.client.force_login(admin)
		bot = Bot.objects.create(token='1:test')
		for url in ('/admin/Telegram/bot/', '/admin/Telegram/bot/add/', f'/admin/Telegram/bot/{bot.pk}/change/'):
			self.assertEqual(self.client.get(url).status_code, 200, url)