#!/usr/bin/env python
# pylint: disable=unused-argument, wrong-import-position
# This program is dedicated to the public domain under the CC0 license.

"""
First, a few callback functions are defined. Then, those functions are passed to
the Application and registered at their respective places.
Then, the bot is started and runs until we press Ctrl-C on the command line.

Usage:
Example of a bot-user conversation using ConversationHandler.
Send /start to initiate the conversation.
Press Ctrl-C on the command line or send a signal to the process to stop the
bot.
"""

import logging
from typing import Dict

from telegram import __version__ as TG_VER

try:
    from telegram import __version_info__
except ImportError:
    __version_info__ = (0, 0, 0, 0, 0)  # type: ignore[assignment]

if __version_info__ < (20, 0, 0, "alpha", 1):
    raise RuntimeError(
        f"This example is not compatible with your current PTB version {TG_VER}. To view the "
        f"{TG_VER} version of this example, "
        f"visit https://github.com/python-telegram-bot/python-telegram-bot/tree/v{TG_VER}/examples"
    )
from telegram import ReplyKeyboardMarkup, ReplyKeyboardRemove, Update
from telegram.ext import (
    Application,
    CommandHandler,
    ContextTypes,
    ConversationHandler,
    MessageHandler,
    filters,
)

# Enable logging
logging.basicConfig(
    format="%(asctime)s - %(name)s - %(levelname)s - %(message)s", level=logging.INFO
)
logger = logging.getLogger(__name__)

CHOOSING, TYPING_REPLY, TYPING_CHOICE = range(3)

reply_keyboard = [
    ["Age", "Favourite colour"],
    ["Number of siblings", "Something else..."],
    ["Done"],
]
markup = ReplyKeyboardMarkup(reply_keyboard, one_time_keyboard=True)


def facts_to_str(user_data: Dict[str, str]) -> str:
    """Helper function for formatting the gathered user info."""
    facts = [f"{key} - {value}" for key, value in user_data.items()]
    return "\n".join(facts).join(["\n", "\n"])


async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> int:
    """Start the conversation and ask user for input."""
    await update.message.reply_text(
        "Hi! My name is Doctor Botter. I will hold a more complex conversation with you. "
        "Why don't you tell me something about yourself?",
        reply_markup=markup,
    )

    return CHOOSING


async def regular_choice(update: Update, context: ContextTypes.DEFAULT_TYPE) -> int:
    """Ask the user for info about the selected predefined choice."""
    text = update.message.text
    context.user_data["choice"] = text
    await update.message.reply_text(f"Your {text.lower()}? Yes, I would love to hear about that!")

    return TYPING_REPLY


async def custom_choice(update: Update, context: ContextTypes.DEFAULT_TYPE) -> int:
    """Ask the user for a description of a custom category."""
    await update.message.reply_text(
        'Alright, please send me the category first, for example "Most impressive skill"'
    )

    return TYPING_CHOICE


async def received_information(update: Update, context: ContextTypes.DEFAULT_TYPE) -> int:
    """Store info provided by user and ask for the next category."""
    user_data = context.user_data
    text = update.message.text
    category = user_data["choice"]
    user_data[category] = text
    del user_data["choice"]

    await update.message.reply_text(
        "Neat! Just so you know, this is what you already told me:"
        f"{facts_to_str(user_data)}You can tell me more, or change your opinion"
        " on something.",
        reply_markup=markup,
    )

    return CHOOSING


async def done(update: Update, context: ContextTypes.DEFAULT_TYPE) -> int:
    """Display the gathered info and end the conversation."""
    user_data = context.user_data
    if "choice" in user_data:
        del user_data["choice"]

    await update.message.reply_text(
        f"I learned these facts about you: {facts_to_str(user_data)}Until next time!",
        reply_markup=ReplyKeyboardRemove(),
    )

    user_data.clear()
    return ConversationHandler.END


def main() -> None:
    """Run the bot."""
    # Create the Application and pass it your bot's token.
    application = Application.builder().token("TOKEN").build()

    # Add conversation handler with the states CHOOSING, TYPING_CHOICE and TYPING_REPLY
    conv_handler = ConversationHandler(
        entry_points=[CommandHandler("start", start)],
        states={
            CHOOSING: [
                MessageHandler(
                    filters.Regex("^(Age|Favourite colour|Number of siblings)$"), regular_choice
                ),
                MessageHandler(filters.Regex("^Something else...$"), custom_choice),
            ],
            TYPING_CHOICE: [
                MessageHandler(
                    filters.TEXT & ~(filters.COMMAND | filters.Regex("^Done$")), regular_choice
                )
            ],
            TYPING_REPLY: [
                MessageHandler(
                    filters.TEXT & ~(filters.COMMAND | filters.Regex("^Done$")),
                    received_information,
                )
            ],
        },
        fallbacks=[MessageHandler(filters.Regex("^Done$"), done)],
    )

    application.add_handler(conv_handler)

    # Run the bot until the user presses Ctrl-C
    application.run_polling()


if __name__ == "__main__":
    main()