#!/usr/bin/env python

# Discord Version check

import sys
import discord
from redbot.core.bot import Red, ExitCodes
from redbot.core.cog_manager import CogManagerUI
from redbot.core.data_manager import load_basic_configuration, config_file
from redbot.core.json_io import JsonIO
from redbot.core.global_checks import init_global_checks
from redbot.core.events import init_events
from redbot.core.cli import interactive_config, confirm, parse_cli_flags, ask_sentry
from redbot.core.core_commands import Core
from redbot.core.dev_commands import Dev
from redbot.core import rpc, __version__
import asyncio
import logging.handlers
import logging
import os


#
#               Red - Discord Bot v3
#
#         Made by Twentysix, improved by many
#


def init_loggers(cli_flags):
    # d.py stuff
    dpy_logger = logging.getLogger("discord")
    dpy_logger.setLevel(logging.WARNING)
    console = logging.StreamHandler()
    console.setLevel(logging.WARNING)
    dpy_logger.addHandler(console)

    # Red stuff

    logger = logging.getLogger("red")

    red_format = logging.Formatter(
        '%(asctime)s %(levelname)s %(module)s %(funcName)s %(lineno)d: '
        '%(message)s',
        datefmt="[%d/%m/%Y %H:%M]")

    stdout_handler = logging.StreamHandler(sys.stdout)
    stdout_handler.setFormatter(red_format)

    if cli_flags.debug:
        os.environ['PYTHONASYNCIODEBUG'] = '1'
        logger.setLevel(logging.DEBUG)
    else:
        logger.setLevel(logging.WARNING)

    from redbot.core.data_manager import core_data_path
    logfile_path = core_data_path() / 'red.log'
    fhandler = logging.handlers.RotatingFileHandler(
        filename=str(logfile_path), encoding='utf-8', mode='a',
        maxBytes=10**7, backupCount=5)
    fhandler.setFormatter(red_format)

    logger.addHandler(fhandler)
    logger.addHandler(stdout_handler)

    # Sentry stuff
    sentry_logger = logging.getLogger("red.sentry")
    sentry_logger.setLevel(logging.WARNING)

    return logger, sentry_logger


async def _get_prefix_and_token(red, indict):
    """
    Again, please blame <@269933075037814786> for this.
    :param indict:
    :return:
    """
    indict['token'] = await red.db.token()
    indict['prefix'] = await red.db.prefix()
    indict['enable_sentry'] = await red.db.enable_sentry()


def list_instances():
    if not config_file.exists():
        print("No instances have been configured! Configure one "
              "using `redbot-setup` before trying to run the bot!")
        sys.exit(1)
    else:
        data = JsonIO(config_file)._load_json()
        text = "Configured Instances:\n\n"
        for instance_name in sorted(data.keys()):
            text += "{}\n".format(instance_name)
        print(text)
        sys.exit(0)


def main():
    description = "Red - Version {}".format(__version__)
    cli_flags = parse_cli_flags(sys.argv[1:])
    if cli_flags.list_instances:
        list_instances()
    elif cli_flags.version:
        print(description)
        sys.exit(0)
    elif not cli_flags.instance_name:
        print("Error: No instance name was provided!")
        sys.exit(1)
    load_basic_configuration(cli_flags.instance_name)
    log, sentry_log = init_loggers(cli_flags)
    red = Red(cli_flags, description=description, pm_help=None)
    init_global_checks(red)
    init_events(red, cli_flags)
    red.add_cog(Core(red))
    red.add_cog(CogManagerUI())
    if cli_flags.dev:
        red.add_cog(Dev())
    loop = asyncio.get_event_loop()
    tmp_data = {}
    loop.run_until_complete(_get_prefix_and_token(red, tmp_data))
    token = os.environ.get("RED_TOKEN", tmp_data['token'])
    prefix = cli_flags.prefix or tmp_data['prefix']
    if token is None or not prefix:
        if cli_flags.no_prompt is False:
            new_token = interactive_config(red, token_set=bool(token),
                                           prefix_set=bool(prefix))
            if new_token:
                token = new_token
        else:
            log.critical("Token and prefix must be set in order to login.")
            sys.exit(1)
    loop.run_until_complete(_get_prefix_and_token(red, tmp_data))
    if tmp_data['enable_sentry']:
        red.enable_sentry()
    cleanup_tasks = True
    try:
        loop.run_until_complete(red.start(token, bot=not cli_flags.not_bot))
    except discord.LoginFailure:
        cleanup_tasks = False  # No login happened, no need for this
        log.critical("This token doesn't seem to be valid. If it belongs to "
                     "a user account, remember that the --not-bot flag "
                     "must be used. For self-bot functionalities instead, "
                     "--self-bot")
        db_token = red.db.token()
        if db_token and not cli_flags.no_prompt:
            print("\nDo you want to reset the token? (y/n)")
            if confirm("> "):
                loop.run_until_complete(red.db.token.set(""))
                print("Token has been reset.")
    except KeyboardInterrupt:
        log.info("Keyboard interrupt detected. Quitting...")
        loop.run_until_complete(red.logout())
        red._shutdown_mode = ExitCodes.SHUTDOWN
    except Exception as e:
        log.critical("Fatal exception", exc_info=e)
        sentry_log.critical("Fatal Exception", exc_info=e)
        loop.run_until_complete(red.logout())
    finally:
        rpc.clean_up()
        if cleanup_tasks:
            pending = asyncio.Task.all_tasks(loop=red.loop)
            gathered = asyncio.gather(
                *pending, loop=red.loop, return_exceptions=True)
            gathered.cancel()

        sys.exit(red._shutdown_mode.value)


if __name__ == '__main__':
    main()