from typing import Any, Dict, List

from django.core.management.base import BaseCommand

from zerver.lib.actions import (
    bulk_add_subscriptions,
    do_add_reaction,
    do_change_avatar_fields,
    do_create_user,
    do_send_messages,
    ensure_stream,
    internal_prep_stream_message,
)
from zerver.lib.emoji import emoji_name_to_emoji_code
from zerver.lib.upload import upload_avatar_image
from zerver.models import Message, UserProfile, get_realm


class Command(BaseCommand):
    help = """Add a mock conversation to the development environment.

Usage: ./manage.py add_mock_conversation

After running the script:

From browser (ideally on high resolution screen):
* Refresh to get the rendered tweet
* Check that the whale emoji reaction comes before the thumbs_up emoji reaction
* Remove the blue box (it's a box shadow on .selected_message .messagebox-content;
  inspecting the selected element will find it fairly quickly)
* Change the color of the stream to #a6c7e5
* Shrink screen till the mypy link only just fits
* Take screenshot that does not include the timestamps or bottom edge

From image editing program:
* Remove mute (and edit) icons from recipient bar
"""

    def set_avatar(self, user: UserProfile, filename: str) -> None:
        upload_avatar_image(open(filename, 'rb'), user, user)
        do_change_avatar_fields(user, UserProfile.AVATAR_FROM_USER, acting_user=None)

    def add_message_formatting_conversation(self) -> None:
        realm = get_realm('zulip')
        stream = ensure_stream(realm, 'zulip features', acting_user=None)

        UserProfile.objects.filter(email__contains='stage').delete()
        starr = do_create_user('1@stage.example.com', 'password', realm, 'Ada Starr', acting_user=None)
        self.set_avatar(starr, 'static/images/characters/starr.png')
        fisher = do_create_user('2@stage.example.com', 'password', realm, 'Bel Fisher', acting_user=None)
        self.set_avatar(fisher, 'static/images/characters/fisher.png')
        twitter_bot = do_create_user('3@stage.example.com', 'password', realm, 'Twitter Bot',
                                     bot_type=UserProfile.DEFAULT_BOT, acting_user=None)
        self.set_avatar(twitter_bot, 'static/images/features/twitter.png')

        bulk_add_subscriptions([stream], list(UserProfile.objects.filter(realm=realm)))

        staged_messages: List[Dict[str, Any]] = [
            {'sender': starr,
             'content': "Hey @**Bel Fisher**, check out Zulip's Markdown formatting! "
             "You can have:\n* bulleted lists\n  * with sub-bullets too\n"
             "* **bold**, *italic*, and ~~strikethrough~~ text\n"
             "* LaTeX for mathematical formulas, both inline -- $$O(n^2)$$ -- and displayed:\n"
             "```math\n\\int_a^b f(t)\\, dt=F(b)-F(a)\n```"},
            {'sender': fisher,
             'content': "My favorite is the syntax highlighting for code blocks\n"
             "```python\ndef fib(n: int) -> int:\n    # returns the n-th Fibonacci number\n"
             "    return fib(n-1) + fib(n-2)\n```"},
            {'sender': starr,
             'content': "I think you forgot your base case there, Bel :laughing:\n"
             "```quote\n```python\ndef fib(n: int) -> int:\n    # returns the n-th Fibonacci number\n"
             "    return fib(n-1) + fib(n-2)\n```\n```"},
            {'sender': fisher,
             'content': "I'm also a big fan of inline link, tweet, video, and image previews. "
             "Check out this picture of Çet Whalin[](/static/images/features/whale.png)!"},
            {'sender': starr,
             'content': "I just set up a custom linkifier, "
                        "so `#1234` becomes [#1234](github.com/zulip/zulip/1234), "
             "a link to the corresponding GitHub issue."},
            {'sender': twitter_bot,
             'content': 'https://twitter.com/gvanrossum/status/786661035637772288'},
            {'sender': fisher,
             'content': "Oops, the Twitter bot I set up shouldn't be posting here. Let me go fix that."},
        ]

        messages = [internal_prep_stream_message(
            realm, message['sender'], stream,
            'message formatting', message['content'],
        ) for message in staged_messages]

        message_ids = do_send_messages(messages)

        preview_message = Message.objects.get(id__in=message_ids, content__icontains='image previews')
        (emoji_code, reaction_type) = emoji_name_to_emoji_code(realm, 'whale')
        do_add_reaction(starr, preview_message, 'whale', emoji_code, reaction_type)

        twitter_message = Message.objects.get(id__in=message_ids, content__icontains='gvanrossum')
        # Setting up a twitter integration in dev is a decent amount of work. If you need
        # to update this tweet, either copy the format below, or send the link to the tweet
        # to chat.zulip.org and ask an admin of that server to get you the rendered_content.
        twitter_message.rendered_content = (
            '<p><a>https://twitter.com/gvanrossum/status/786661035637772288</a></p>\n'
            '<div class="inline-preview-twitter"><div class="twitter-tweet">'
            '<a><img class="twitter-avatar" '
            'src="https://pbs.twimg.com/profile_images/424495004/GuidoAvatar_bigger.jpg"></a>'
            '<p>Great blog post about Zulip\'s use of mypy: '
            '<a>http://blog.zulip.org/2016/10/13/static-types-in-python-oh-mypy/</a></p>'
            '<span>- Guido van Rossum (@gvanrossum)</span></div></div>')
        twitter_message.save(update_fields=['rendered_content'])

        # Put a short pause between the whale reaction and this, so that the
        # thumbs_up shows up second
        (emoji_code, reaction_type) = emoji_name_to_emoji_code(realm, 'thumbs_up')
        do_add_reaction(starr, preview_message, 'thumbs_up', emoji_code, reaction_type)

    def handle(self, *args: Any, **options: str) -> None:
        self.add_message_formatting_conversation()