# Works with Python 3.8
import datetime
import html
import io
import json
import logging
import os
import random
import string
import traceback
from logging import critical, debug, error, info, warning
from uuid import uuid4

import mplfinance as mpf
import telegram
from telegram import (
    InlineQueryResultArticle,
    InputTextMessageContent,
    LabeledPrice,
    Update,
)
from telegram.ext import (
    CallbackContext,
    CommandHandler,
    Filters,
    InlineQueryHandler,
    MessageHandler,
    PreCheckoutQueryHandler,
    Updater,
)

from symbol_router import Router
from T_info import T_info

TELEGRAM_TOKEN = os.environ["TELEGRAM"]

try:
    STRIPE_TOKEN = os.environ["STRIPE"]
except KeyError:
    STRIPE_TOKEN = ""
    warning("Starting without a STRIPE Token will not allow you to accept Donations!")

s = Router()
t = T_info()

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

logger = logging.getLogger(__name__)
info("Bot script started.")


def start(update: Update, context: CallbackContext):
    """Send help text when the command /start is issued."""
    info(f"Start command ran by {update.message.chat.username}")
    update.message.reply_text(
        text=t.help_text,
        parse_mode=telegram.ParseMode.MARKDOWN,
        disable_notification=True,
    )


def help(update: Update, context: CallbackContext):
    """Send help text when the command /help is issued."""
    info(f"Help command ran by {update.message.chat.username}")
    update.message.reply_text(
        text=t.help_text,
        parse_mode=telegram.ParseMode.MARKDOWN,
        disable_notification=True,
    )


def license(update: Update, context: CallbackContext):
    """Send bots license when the /license command is issued."""
    info(f"License command ran by {update.message.chat.username}")
    update.message.reply_text(
        text=t.license,
        parse_mode=telegram.ParseMode.MARKDOWN,
        disable_notification=True,
    )


def status(update: Update, context: CallbackContext):
    """Gather status of bot and dependant services and return important status updates."""
    warning(f"Status command ran by {update.message.chat.username}")
    bot_resp_time = (
        datetime.datetime.now(update.message.date.tzinfo) - update.message.date
    )

    bot_status = s.status(
        f"It took {bot_resp_time.total_seconds()} seconds for the bot to get your message."
    )

    update.message.reply_text(
        text=bot_status,
        parse_mode=telegram.ParseMode.MARKDOWN,
    )


def donate(update: Update, context: CallbackContext):
    """Sets up donation."""
    info(f"Donate command ran by {update.message.chat.username}")
    chat_id = update.message.chat_id

    if update.message.text.strip() == "/donate" or "/donate@" in update.message.text:
        update.message.reply_text(
            text=t.donate_text,
            parse_mode=telegram.ParseMode.MARKDOWN,
            disable_notification=True,
        )
        amount = 1
    else:
        amount = update.message.text.replace("/donate", "").replace("$", "").strip()

    try:
        price = int(float(amount) * 100)
    except ValueError:
        update.message.reply_text(f"{amount} is not a valid donation amount or number.")
        return
    info(f"Donation amount: {price} by {update.message.chat.username}")

    context.bot.send_invoice(
        chat_id=chat_id,
        title="Simple Stock Bot Donation",
        description=f"Simple Stock Bot Donation of ${amount} by {update.message.chat.username}",
        payload=f"simple-stock-bot-{chat_id}",
        provider_token=STRIPE_TOKEN,
        currency="USD",
        prices=[LabeledPrice("Donation:", price)],
        start_parameter="",
        # suggested_tip_amounts=[100, 500, 1000, 2000],
        photo_url="https://simple-stock-bots.gitlab.io/docs/img/Telegram.png",
        photo_width=500,
        photo_height=500,
    )


def precheckout_callback(update: Update, context: CallbackContext):
    """Approves donation"""
    info(f"precheckout_callback queried")
    query = update.pre_checkout_query

    query.answer(ok=True)
    # I dont think I need to check since its only donations.
    # if query.invoice_payload == "simple-stock-bot":
    #     # answer False pre_checkout_query
    #     query.answer(ok=True)
    # else:
    #     query.answer(ok=False, error_message="Something went wrong...")


def successful_payment_callback(update: Update, context: CallbackContext):
    """Thanks user for donation"""
    info(f"Successful payment!")
    update.message.reply_text(
        "Thank you for your donation! It goes a long way to keeping the bot free!"
    )


def symbol_detect_image(update: Update, context: CallbackContext):
    """
    Makes image captions into text then passes the `update` and `context`
        to symbol detect so that it can reply cashtags in image captions.
    """
    if update.message.caption:
        update.message.text = update.message.caption
        symbol_detect(update, context)


def symbol_detect(update: Update, context: CallbackContext):
    """
    Runs on any message that doesn't have a command and searches for cashtags,
        then returns the prices of any symbols found.
    """
    try:
        message = update.message.text
        chat_id = update.message.chat_id
        if "$" in message:
            symbols = s.find_symbols(message)
            info("Looking for Symbols")
        else:
            return
    except AttributeError as ex:
        info(ex)
        return
    if symbols:
        # Let user know bot is working
        context.bot.send_chat_action(chat_id=chat_id, action=telegram.ChatAction.TYPING)
        info(f"Symbols found: {symbols}")

        for reply in s.price_reply(symbols):
            update.message.reply_text(
                text=reply,
                parse_mode=telegram.ParseMode.MARKDOWN,
                disable_notification=True,
            )


def intra(update: Update, context: CallbackContext):
    """returns a chart of intraday data for a symbol"""
    info(f"Intra command ran by {update.message.chat.username}")

    message = update.message.text
    chat_id = update.message.chat_id

    if message.strip().split("@")[0] == "/intra":
        update.message.reply_text(
            "This command returns a chart of the stocks movement since the most recent market open.\nExample: /intra $tsla"
        )
        return

    symbols = s.find_symbols(message, trending_weight=5)
    symbol = symbols[0]

    if len(symbols):
        symbol = symbols[0]
    else:
        update.message.reply_text("No symbols or coins found.")
        return

    df = s.intra_reply(symbol)
    if df.empty:
        update.message.reply_text(
            text="Invalid symbol please see `/help` for usage details.",
            parse_mode=telegram.ParseMode.MARKDOWN,
            disable_notification=True,
        )
        return

    context.bot.send_chat_action(
        chat_id=chat_id, action=telegram.ChatAction.UPLOAD_PHOTO
    )

    buf = io.BytesIO()
    mpf.plot(
        df,
        type="renko",
        title=f"\n{symbol.name}",
        volume="volume" in df.keys(),
        style="yahoo",
        savefig=dict(fname=buf, dpi=400, bbox_inches="tight"),
    )
    buf.seek(0)

    update.message.reply_photo(
        photo=buf,
        caption=f"\nIntraday chart for {symbol.name} from {df.first_valid_index().strftime('%d %b at %H:%M')} to"
        + f" {df.last_valid_index().strftime('%d %b at %H:%M')}"
        + f"\n\n{s.price_reply([symbol])[0]}",
        parse_mode=telegram.ParseMode.MARKDOWN,
        disable_notification=True,
    )


def chart(update: Update, context: CallbackContext):
    """returns a chart of the past month of data for a symbol"""
    info(f"Chart command ran by {update.message.chat.username}")

    message = update.message.text
    chat_id = update.message.chat_id

    if message.strip().split("@")[0] == "/chart":
        update.message.reply_text(
            "This command returns a chart of the stocks movement for the past month.\nExample: /chart $tsla"
        )
        return

    symbols = s.find_symbols(message, trending_weight=10)

    if len(symbols):
        symbol = symbols[0]
    else:
        update.message.reply_text("No symbols or coins found.")
        return

    df = s.chart_reply(symbol)
    if df.empty:
        update.message.reply_text(
            text="Invalid symbol please see `/help` for usage details.",
            parse_mode=telegram.ParseMode.MARKDOWN,
            disable_notification=True,
        )
        return
    context.bot.send_chat_action(
        chat_id=chat_id, action=telegram.ChatAction.UPLOAD_PHOTO
    )

    buf = io.BytesIO()
    mpf.plot(
        df,
        type="candle",
        title=f"\n{symbol.name}",
        volume="volume" in df.keys(),
        style="yahoo",
        savefig=dict(fname=buf, dpi=400, bbox_inches="tight"),
    )
    buf.seek(0)

    update.message.reply_photo(
        photo=buf,
        caption=f"\n1 Month chart for {symbol.name} from {df.first_valid_index().strftime('%d, %b %Y')}"
        + f" to {df.last_valid_index().strftime('%d, %b %Y')}\n\n{s.price_reply([symbol])[0]}",
        parse_mode=telegram.ParseMode.MARKDOWN,
        disable_notification=True,
    )


def trending(update: Update, context: CallbackContext):
    """returns currently trending symbols and how much they've moved in the past trading day."""
    info(f"Trending command ran by {update.message.chat.username}")

    chat_id = update.message.chat_id

    context.bot.send_chat_action(chat_id=chat_id, action=telegram.ChatAction.TYPING)

    trending_list = s.trending()
    info(trending_list)

    update.message.reply_text(
        text=trending_list,
        parse_mode=telegram.ParseMode.MARKDOWN,
        disable_notification=True,
    )


def inline_query(update: Update, context: CallbackContext):
    """
    Handles inline query. Searches by looking if query is contained
        in the symbol and returns matches in alphabetical order.
    """
    # info(f"Inline command ran by {update.message.chat.username}")
    info(f"Query: {update.inline_query.query}")

    ignored_queries = {"$", "$$", " ", ""}

    if update.inline_query.query.strip() in ignored_queries:
        default_message = """
        You can type:\n@SimpleStockBot `[search]`\nin any chat or direct message to search for the stock bots full list of stock and crypto symbols and return the price.
        """

        update.inline_query.answer(
            [
                InlineQueryResultArticle(
                    str(uuid4()),
                    title="Please enter a query. It can be a ticker or a name of a company.",
                    input_message_content=InputTextMessageContent(
                        default_message, parse_mode=telegram.ParseMode.MARKDOWN
                    ),
                )
            ]
        )

    matches = s.inline_search(update.inline_query.query)

    results = []
    for _, row in matches.iterrows():
        results.append(
            InlineQueryResultArticle(
                str(uuid4()),
                title=row["description"],
                input_message_content=InputTextMessageContent(
                    row["price_reply"], parse_mode=telegram.ParseMode.MARKDOWN
                ),
            )
        )

        if len(results) == 5:
            update.inline_query.answer(results, cache_time=60 * 60)
            info("Inline Command was successful")
            return
    update.inline_query.answer(results)


def rand_pick(update: Update, context: CallbackContext):
    """For the gamblers. Returns a random symbol to buy and a sell date"""
    info(
        f"Someone is gambling! Random_pick command ran by {update.message.chat.username}"
    )

    update.message.reply_text(
        text=s.random_pick(),
        parse_mode=telegram.ParseMode.MARKDOWN,
        disable_notification=True,
    )


def error(update: Update, context: CallbackContext):
    """Log Errors caused by Updates."""
    warning('Update "%s" caused error "%s"', update, error)

    tb_list = traceback.format_exception(
        None, context.error, context.error.__traceback__
    )
    tb_string = "".join(tb_list)

    err_code = "".join([random.choice(string.ascii_lowercase) for i in range(5)])
    warning(f"Logging error: {err_code}")

    if update:
        message = (
            f"An exception was raised while handling an update\n"
            f"<pre>update = {html.escape(json.dumps(update.to_dict(), indent=2, ensure_ascii=False))}"
            "</pre>\n\n"
            f"<pre>context.chat_data = {html.escape(str(context.chat_data))}</pre>\n\n"
            f"<pre>context.user_data = {html.escape(str(context.user_data))}</pre>\n\n"
            f"<pre>{html.escape(tb_string)}</pre>"
        )
        warning(message)
    else:
        warning(tb_string)

    # update.message.reply_text(
    #     text=f"An error has occured. Please inform @MisterBiggs if the error persists. Error Code: `{err_code}`",
    #     parse_mode=telegram.ParseMode.MARKDOWN,
    # )

    # Finally, send the message
    # update.message.reply_text(text=message, parse_mode=telegram.ParseMode.HTML)
    # update.message.reply_text(text="Please inform the bot admin of this issue.")


def main():
    """Start the context.bot."""
    # Create the EventHandler and pass it your bot's token.
    updater = Updater(TELEGRAM_TOKEN)

    # Get the dispatcher to register handlers
    dp = updater.dispatcher

    # on different commands - answer in Telegram
    dp.add_handler(CommandHandler("start", start))
    dp.add_handler(CommandHandler("help", help))
    dp.add_handler(CommandHandler("license", license))
    dp.add_handler(CommandHandler("trending", trending))
    dp.add_handler(CommandHandler("random", rand_pick))
    dp.add_handler(CommandHandler("donate", donate))
    dp.add_handler(CommandHandler("status", status))
    dp.add_handler(CommandHandler("inline", inline_query))

    # Charting can be slow so they run async.
    dp.add_handler(CommandHandler("intra", intra, run_async=True))
    dp.add_handler(CommandHandler("intraday", intra, run_async=True))
    dp.add_handler(CommandHandler("day", intra, run_async=True))
    dp.add_handler(CommandHandler("chart", chart, run_async=True))
    dp.add_handler(CommandHandler("month", chart, run_async=True))

    # on noncommand i.e message - echo the message on Telegram
    dp.add_handler(MessageHandler(Filters.text, symbol_detect))
    dp.add_handler(MessageHandler(Filters.photo, symbol_detect_image))

    # Inline Bot commands
    dp.add_handler(InlineQueryHandler(inline_query))

    # Pre-checkout handler to final check
    dp.add_handler(PreCheckoutQueryHandler(precheckout_callback))

    # Payment success
    dp.add_handler(
        MessageHandler(Filters.successful_payment, successful_payment_callback)
    )

    # log all errors
    dp.add_error_handler(error)

    # Start the Bot
    updater.start_polling()

    updater.idle()


if __name__ == "__main__":
    main()