"""
This is a simple example of usage of CallbackData factory
For more comprehensive example see callback_data_factory.py
"""

import logging

from aiogram import Bot, Dispatcher, executor, types
from aiogram.contrib.middlewares.logging import LoggingMiddleware
from aiogram.utils.callback_data import CallbackData
from aiogram.utils.exceptions import MessageNotModified

logging.basicConfig(level=logging.INFO)

API_TOKEN = 'BOT_TOKEN_HERE'


bot = Bot(token=API_TOKEN)

dp = Dispatcher(bot)
dp.middleware.setup(LoggingMiddleware())

vote_cb = CallbackData('vote', 'action')  # vote:<action>
likes = {}  # user_id: amount_of_likes


def get_keyboard():
    return types.InlineKeyboardMarkup().row(
        types.InlineKeyboardButton('👍', callback_data=vote_cb.new(action='up')),
        types.InlineKeyboardButton('👎', callback_data=vote_cb.new(action='down')))


@dp.message_handler(commands=['start'])
async def cmd_start(message: types.Message):
    amount_of_likes = likes.get(message.from_user.id, 0)  # get value if key exists else set to 0
    await message.reply(f'Vote! Now you have {amount_of_likes} votes.', reply_markup=get_keyboard())


@dp.callback_query_handler(vote_cb.filter(action='up'))
async def vote_up_cb_handler(query: types.CallbackQuery, callback_data: dict):
    logging.info(callback_data)  # callback_data contains all info from callback data
    likes[query.from_user.id] = likes.get(query.from_user.id, 0) + 1  # update amount of likes in storage
    amount_of_likes = likes[query.from_user.id]

    await bot.edit_message_text(f'You voted up! Now you have {amount_of_likes} votes.',
                                query.from_user.id,
                                query.message.message_id,
                                reply_markup=get_keyboard())


@dp.callback_query_handler(vote_cb.filter(action='down'))
async def vote_down_cb_handler(query: types.CallbackQuery, callback_data: dict):
    logging.info(callback_data)  # callback_data contains all info from callback data
    likes[query.from_user.id] = likes.get(query.from_user.id, 0) - 1  # update amount of likes in storage
    amount_of_likes = likes[query.from_user.id]

    await bot.edit_message_text(f'You voted down! Now you have {amount_of_likes} votes.',
                                query.from_user.id,
                                query.message.message_id,
                                reply_markup=get_keyboard())


@dp.errors_handler(exception=MessageNotModified)  # handle the cases when this exception raises
async def message_not_modified_handler(update, error):
    # pass
    return True


if __name__ == '__main__':
    executor.start_polling(dp, skip_updates=True)