from collections import namedtuple
from typing import List
from unittest import mock

from zerver.lib.actions import get_client
from zerver.lib.test_classes import ZulipTestCase
from zerver.lib.test_helpers import reset_emails_in_zulip_realm
from zerver.models import UserProfile, get_realm, get_user
from zerver.views.message_send import InvalidMirrorInput, create_mirrored_message_users


class MirroredMessageUsersTest(ZulipTestCase):
    def test_invalid_sender(self) -> None:
        user = self.example_user('hamlet')
        recipients: List[str] = []

        Request = namedtuple('Request', ['POST'])
        request = Request(POST=dict())  # no sender

        with self.assertRaises(InvalidMirrorInput):
            create_mirrored_message_users(request, user, recipients)

    def test_invalid_client(self) -> None:
        client = get_client(name='banned_mirror')  # Invalid!!!

        user = self.example_user('hamlet')
        sender = user

        recipients: List[str] = []

        Request = namedtuple('Request', ['POST', 'client'])
        request = Request(POST = dict(sender=sender.email, type='private'),
                          client = client)

        with self.assertRaises(InvalidMirrorInput):
            create_mirrored_message_users(request, user, recipients)

    def test_invalid_email(self) -> None:
        invalid_email = 'alice AT example.com'
        recipients = [invalid_email]

        # We use an MIT user here to maximize code coverage
        user = self.mit_user('starnine')
        sender = user

        Request = namedtuple('Request', ['POST', 'client'])

        for client_name in ['zephyr_mirror', 'irc_mirror', 'jabber_mirror']:
            client = get_client(name=client_name)

            request = Request(POST = dict(sender=sender.email, type='private'),
                              client = client)

            with self.assertRaises(InvalidMirrorInput):
                create_mirrored_message_users(request, user, recipients)

    @mock.patch('DNS.dnslookup', return_value=[['sipbtest:*:20922:101:Fred Sipb,,,:/mit/sipbtest:/bin/athena/tcsh']])
    def test_zephyr_mirror_new_recipient(self, ignored: object) -> None:
        """Test mirror dummy user creation for PM recipients"""
        client = get_client(name='zephyr_mirror')

        user = self.mit_user('starnine')
        sender = self.mit_user('sipbtest')
        new_user_email = 'bob_the_new_user@mit.edu'
        new_user_realm = get_realm("zephyr")

        recipients = [user.email, new_user_email]

        # Now make the request.
        Request = namedtuple('Request', ['POST', 'client'])
        request = Request(POST = dict(sender=sender.email, type='private'),
                          client = client)

        mirror_sender = create_mirrored_message_users(request, user, recipients)

        self.assertEqual(mirror_sender, sender)

        realm_users = UserProfile.objects.filter(realm=sender.realm)
        realm_emails = {user.email for user in realm_users}
        self.assertIn(user.email, realm_emails)
        self.assertIn(new_user_email, realm_emails)

        bob = get_user(new_user_email, new_user_realm)
        self.assertTrue(bob.is_mirror_dummy)

    @mock.patch('DNS.dnslookup', return_value=[['sipbtest:*:20922:101:Fred Sipb,,,:/mit/sipbtest:/bin/athena/tcsh']])
    def test_zephyr_mirror_new_sender(self, ignored: object) -> None:
        """Test mirror dummy user creation for sender when sending to stream"""
        client = get_client(name='zephyr_mirror')

        user = self.mit_user('starnine')
        sender_email = 'new_sender@mit.edu'

        recipients = ['stream_name']

        # Now make the request.
        Request = namedtuple('Request', ['POST', 'client'])
        request = Request(POST = dict(sender=sender_email, type='stream'),
                          client = client)

        mirror_sender = create_mirrored_message_users(request, user, recipients)

        assert(mirror_sender is not None)
        self.assertEqual(mirror_sender.email, sender_email)
        self.assertTrue(mirror_sender.is_mirror_dummy)

    def test_irc_mirror(self) -> None:
        reset_emails_in_zulip_realm()
        client = get_client(name='irc_mirror')

        sender = self.example_user('hamlet')

        recipients = [self.nonreg_email('alice'), 'bob@irc.zulip.com', self.nonreg_email('cordelia')]

        # Now make the request.
        Request = namedtuple('Request', ['POST', 'client'])
        request = Request(POST = dict(sender=sender.email, type='private'),
                          client = client)

        mirror_sender = create_mirrored_message_users(request, sender, recipients)

        self.assertEqual(mirror_sender, sender)

        realm_users = UserProfile.objects.filter(realm=sender.realm)
        realm_emails = {user.email for user in realm_users}
        self.assertIn(self.nonreg_email('alice'), realm_emails)
        self.assertIn('bob@irc.zulip.com', realm_emails)

        bob = get_user('bob@irc.zulip.com', sender.realm)
        self.assertTrue(bob.is_mirror_dummy)

    def test_jabber_mirror(self) -> None:
        reset_emails_in_zulip_realm()
        client = get_client(name='jabber_mirror')

        sender = self.example_user('hamlet')
        user = sender

        recipients = [self.nonreg_email('alice'), self.nonreg_email('bob'), self.nonreg_email('cordelia')]

        # Now make the request.
        Request = namedtuple('Request', ['POST', 'client'])
        request = Request(POST = dict(sender=sender.email, type='private'),
                          client = client)

        mirror_sender = create_mirrored_message_users(request, user, recipients)

        self.assertEqual(mirror_sender, sender)

        realm_users = UserProfile.objects.filter(realm=sender.realm)
        realm_emails = {user.email for user in realm_users}
        self.assertIn(self.nonreg_email('alice'), realm_emails)
        self.assertIn(self.nonreg_email('bob'), realm_emails)

        bob = get_user(self.nonreg_email('bob'), sender.realm)
        self.assertTrue(bob.is_mirror_dummy)