# This file is part of python-cinema-club-bot
# contributed in 2024 by Mikhail Kirillov (~w96k) <w96k@runbox.com>

# To the extent possible under law, the author(s) have dedicated all copyright
# and related and neighboring rights to this software to the public domain
# worldwide. This software is distributed without any warranty.

# You should have received a copy of the CC0 Public Domain Dedication along
# with this software. If not, see:
# <http://creativecommons.org/publicdomain/zero/1.0/>

from telegram import Update, error
from telegram.ext import ContextTypes
from collections import deque

from strings import USER_NOT_PROVIDED, USERS_ADDED, USERS_REMOVED, \
    EXPECTED_ONE_USER, USER_SET, USER_REMOVE, ADD_MORE_USERS, \
    NEXT_MOVIE_USER, USER_NOT_FOUND, USER_CHOOSE, NO_USERS, \
    NEXT_MOVIE
from utils import context_init, create_users_string, choose_next_user, \
    normalize_username
from predicates import has_finished_movie, has_event_without_movie


async def set_users(
        update: Update,
        context: ContextTypes.DEFAULT_TYPE
) -> None:
    context_init(context)

    if context.args == []:
        raise error.TelegramError(USER_NOT_PROVIDED)

    context.chat_data["users"] = context.args

    await update.message.reply_text(USER_SET)


async def add_users(
        update: Update,
        context: ContextTypes.DEFAULT_TYPE
) -> None:
    context_init(context)

    if context.args == []:
        raise error.TelegramError(USER_NOT_PROVIDED)

    for user in context.args:
        context.chat_data["users"].append(user)

    await update.message.reply_text(USERS_ADDED)


async def list_users(
        update: Update,
        context: ContextTypes.DEFAULT_TYPE
) -> None:
    context_init(context)

    users = context.chat_data["users"]

    if users == []:
        await update.message.reply_text(NO_USERS)
        return

    if has_finished_movie(context):
        users = context.chat_data["users"] = choose_next_user(context)

    await update.message.reply_markdown(create_users_string(users))


async def who_is_next(
        update: Update,
        context: ContextTypes.DEFAULT_TYPE
) -> None:
    """
    This commands sets the next chooser if needed and shows current
    """

    context_init(context)

    users = context.chat_data["users"]

    if users == []:
        raise error.TelegramError(ADD_MORE_USERS)

    if has_finished_movie(context):
        users = context.chat_data["users"] = choose_next_user(context)

    next_user_string = NEXT_MOVIE_USER.format(user=users[0])

    last_movie = context.chat_data["movies"][-1] \
        if context.chat_data["movies"] != [] else None

    if last_movie and last_movie["user"] == normalize_username(users[0]):
        next_user_string += NEXT_MOVIE.format(movie=last_movie["title"])

    await update.message.reply_text(next_user_string)


async def remove_users(
        update: Update,
        context: ContextTypes.DEFAULT_TYPE
) -> None:
    context_init(context)

    if context.args == []:
        raise error.TelegramError(USER_NOT_PROVIDED)

    for user in context.args:
        if user == "*":
            context.chat_data["users"] = []
            break

        context.chat_data["users"].remove(user)
        await update.message.reply_text(USER_REMOVE.format(user=user))

    await update.message.reply_text(USERS_REMOVED)


async def chooser_user(
        update: Update,
        context: ContextTypes.DEFAULT_TYPE
) -> None:
    context_init(context)

    if context.args == []:
        raise error.TelegramError(USER_NOT_PROVIDED)

    if len(context.args) > 1:
        raise error.TelegramError(EXPECTED_ONE_USER)

    chooser = context.args[0]
    users = deque(context.chat_data["users"])

    try:
        chooser_index = users.index(chooser)
    except ValueError:
        raise error.TelegramError(USER_NOT_FOUND.format(user=chooser))

    users.rotate(-chooser_index)
    users = list(users)

    context.chat_data["users"] = users

    if has_finished_movie(context):
        users = context.chat_data["users"] = choose_next_user(context)

    if has_event_without_movie(context):
        context.chat_data["events"][-1]["user"] = users[0]

    await update.message.reply_text(USER_CHOOSE.format(user=users[0]))

    await update.message.reply_markdown(create_users_string(users))