from __future__ import absolute_import
from __future__ import print_function

from django.conf import settings

from zerver.lib.actions import set_default_streams, bulk_add_subscriptions, \
    internal_prep_stream_message, internal_send_private_message, \
    create_stream_if_needed, create_streams_if_needed, do_send_messages, \
    do_add_reaction
from zerver.models import Realm, UserProfile, Message, Reaction, get_system_bot

from typing import Any, Dict, List, Mapping, Text

def send_initial_pms(user):
    # type: (UserProfile) -> None
    content = (
        "Hello, and welcome to Zulip!\n\nThis is a private message from me, Welcome Bot. "
        "Here are some tips to get you started:\n"
        "* Download our [Desktop and mobile apps](/apps)\n"
        "* Customize your account and notifications on your [Settings page](#settings).\n"
        "* Check out our !modal_link(#keyboard-shortcuts, Keyboard shortcuts)\n\n"
        "The most important shortcut is `r` or `Enter` to reply.\n\n"
        "Practice sending a few messages by replying to this conversation. If you're not into "
        "keyboards, that's okay too; clicking anywhere on this message will also do the trick!")

    internal_send_private_message(user.realm, get_system_bot(settings.WELCOME_BOT),
                                  user.email, content)

def setup_initial_streams(realm):
    # type: (Realm) -> None
    stream_dicts = [
        {'name': "general"},
        {'name': "new members",
         'description': "For welcoming and onboarding new members. If you haven't yet, "
         "introduce yourself in a new thread using your name as the topic!"},
        {'name': "zulip",
         'description': "For discussing Zulip, Zulip tips and tricks, and asking "
         "questions about how Zulip works"}]  # type: List[Mapping[str, Any]]
    create_streams_if_needed(realm, stream_dicts)
    set_default_streams(realm, {stream['name']: {} for stream in stream_dicts})

# For the first user in a realm
def setup_initial_private_stream(user):
    # type: (UserProfile) -> None
    stream, _ = create_stream_if_needed(user.realm, "core team", invite_only=True,
                                        stream_description="A private stream for core team members.")
    bulk_add_subscriptions([stream], [user])

def send_initial_realm_messages(realm):
    # type: (Realm) -> None
    welcome_bot = get_system_bot(settings.WELCOME_BOT)
    # Make sure each stream created in the realm creation process has at least one message below
    # Order corresponds to the ordering of the streams on the left sidebar, to make the initial Home
    # view slightly less overwhelming
    welcome_messages = [
        {'stream': Realm.DEFAULT_NOTIFICATION_STREAM_NAME,
         'topic': "welcome",
         'content': "This is a message on stream `%s` with the topic `welcome`. We'll use this stream "
         "for system-generated notifications." % (Realm.DEFAULT_NOTIFICATION_STREAM_NAME,)},
        {'stream': "core team",
         'topic': "private streams",
         'content': "This is a private stream. Only admins and people you invite "
         "to the stream will be able to see that this stream exists."},
        {'stream': "general",
         'topic': "welcome",
         'content': "Welcome to #**general**."},
        {'stream': "new members",
         'topic': "onboarding",
         'content': "A #**new members** stream is great for onboarding new members.\n\nIf you're "
         "reading this and aren't the first person here, introduce yourself in a new thread "
         "using your name as the topic! Type `c` or click on `New Topic` at the bottom of the "
         "screen to start a new topic."},
        {'stream': "zulip",
         'topic': "topic demonstration",
         'content': "Here is a message in one topic. Replies to this message will go to this topic."},
        {'stream': "zulip",
         'topic': "topic demonstration",
         'content': "A second message in this topic. With [turtles](/static/images/cute/turtle.png)!"},
        {'stream': "zulip",
         'topic': "second topic",
         'content': "This is a message in a second topic.\n\nTopics are similar to email subjects, "
         "in that each conversation should get its own topic. Keep them short, though; one "
         "or two words will do it!"},
    ]  # type: List[Dict[str, Text]]
    messages = [internal_prep_stream_message(
        realm, welcome_bot,
        message['stream'], message['topic'], message['content']) for message in welcome_messages]
    message_ids = do_send_messages(messages)

    # We find the one of our just-sent messages with turtle.png in it,
    # and react to it.  This is a bit hacky, but works and is kinda a
    # 1-off thing.
    turtle_message = Message.objects.get(
        id__in=message_ids,
        subject='topic demonstration',
        content__icontains='cute/turtle.png')
    do_add_reaction(welcome_bot, turtle_message, 'turtle')