import asyncio
import logging
import random
import uuid

from aiogram import Bot, Dispatcher, executor, md, types
from aiogram.contrib.fsm_storage.memory import MemoryStorage
from aiogram.contrib.middlewares.logging import LoggingMiddleware
from aiogram.utils.callback_data import CallbackData
from aiogram.utils.exceptions import MessageNotModified, Throttled

logging.basicConfig(level=logging.INFO)

API_TOKEN = "BOT TOKEN HERE"

loop = asyncio.get_event_loop()
bot = Bot(token=API_TOKEN, loop=loop, parse_mode=types.ParseMode.HTML)
storage = MemoryStorage()
dp = Dispatcher(bot, storage=storage)
dp.middleware.setup(LoggingMiddleware())

POSTS = {
    str(uuid.uuid4()): {
        "title": f"Post {index}",
        "body": "Lorem ipsum dolor sit amet, "
        "consectetur adipiscing elit, "
        "sed do eiusmod tempor incididunt ut "
        "labore et dolore magna aliqua",
        "votes": random.randint(-2, 5),
    }
    for index in range(1, 6)
}

posts_cb = CallbackData("post", "id", "action")  # post:<id>:<action>


def get_keyboard() -> types.InlineKeyboardMarkup:
    """
    Generate keyboard with list of posts
    """
    markup = types.InlineKeyboardMarkup()
    for post_id, post in POSTS.items():
        markup.add(
            types.InlineKeyboardButton(
                post["title"], callback_data=posts_cb.new(id=post_id, action="view")
            )
        )
    return markup


def format_post(post_id: str, post: dict) -> (str, types.InlineKeyboardMarkup):
    text = (
        f"{md.hbold(post['title'])}\n"
        f"{md.quote_html(post['body'])}\n"
        f"\n"
        f"Votes: {post['votes']}"
    )

    markup = types.InlineKeyboardMarkup()
    markup.row(
        types.InlineKeyboardButton("👍", callback_data=posts_cb.new(id=post_id, action="like")),
        types.InlineKeyboardButton("👎", callback_data=posts_cb.new(id=post_id, action="unlike")),
    )
    markup.add(
        types.InlineKeyboardButton("<< Back", callback_data=posts_cb.new(id="-", action="list"))
    )
    return text, markup


@dp.message_handler(commands="start")
async def cmd_start(message: types.Message):
    await message.reply("Posts", reply_markup=get_keyboard())


@dp.callback_query_handler(posts_cb.filter(action="list"))
async def query_show_list(query: types.CallbackQuery):
    await query.message.edit_text("Posts", reply_markup=get_keyboard())


@dp.callback_query_handler(posts_cb.filter(action="view"))
async def query_view(query: types.CallbackQuery, callback_data: dict):
    post_id = callback_data["id"]

    post = POSTS.get(post_id, None)
    if not post:
        return await query.answer("Unknown post!")

    text, markup = format_post(post_id, post)
    await query.message.edit_text(text, reply_markup=markup)


@dp.callback_query_handler(posts_cb.filter(action=["like", "unlike"]))
async def query_post_vote(query: types.CallbackQuery, callback_data: dict):
    try:
        await dp.throttle("vote", rate=1)
    except Throttled:
        return await query.answer("Too many requests.")

    post_id = callback_data["id"]
    action = callback_data["action"]

    post = POSTS.get(post_id, None)
    if not post:
        return await query.answer("Unknown post!")

    if action == "like":
        post["votes"] += 1
    elif action == "unlike":
        post["votes"] -= 1

    await query.answer("Voted.")
    text, markup = format_post(post_id, post)
    await query.message.edit_text(text, reply_markup=markup)


@dp.errors_handler(exception=MessageNotModified)
async def message_not_modified_handler(update, error):
    return True


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