from discord import Game
from discord.ext import commands
from requests import exceptions as request_exception
from discord.utils import oauth_url
import requests
import logging
import time
import traceback
import sys
from GeoffreyBot.geoffrey_api import HandledError

logger = logging.getLogger('GeoffreyBot')

description = '''
Geoffrey (pronounced JOFF-ree) started his life as an inside joke none of you will understand.
At some point, she was to become an airhorn discord_bot. Now, they know where your stuff is.

If have a suggestion or if something is borked, you can PM my ding dong of a creator ZeroHD.

*You must use ?register before adding things to Geoffrey*
'''

bad_error_message = 'OOPSIE WOOPSIE!! Uwu We made a fucky wucky!! A wittle fucko boingo! The admins at our ' \
                    'headquarters are working VEWY HAWD to fix this! (Error in command {})'


class GeoffreyBot(commands.Bot):
    def __init__(self, base_url, api_token):
        self.base_url = base_url
        self.api_token = api_token

        settings_url = base_url + '/GeoffreyApp/api/settings/'
        command_list_url = base_url + '/GeoffreyApp/api/command/commands'

        logger.info("Connecting to the Geoffrey API... ")
        while True:
            try:
                setting = requests.get(url=settings_url, params={"api": self.api_token}).json()
                self.command_list = requests.get(url=command_list_url, params={"api": self.api_token}).json()
                break
            except Exception:
                time.sleep(1)

        self.prefix = setting['BOT_PREFIX']
        self.error_users = setting['ERROR_USERS']
        self.admin_users = setting['MOD_RANKS']
        self.special_users = []
        self.default_status = setting['STATUS']

        super().__init__(command_prefix=self.prefix, description=description, case_insensitive=True, help_command=None)

        self.load_extension('GeoffreyBot.geoffrey_api')

        self.help_page = self.build_help_page()
        self.help_dict = self.build_help_dict()

    async def on_ready(self):
        logger.info("%s Online, ID: %s", self.user.name, self.user.id)
        info = await self.application_info()
        url = oauth_url(info.id)
        logger.info("Bot url: %s", url)
        await self.change_presence(activity=Game(self.default_status))

    async def on_command(self, ctx):
        if ctx.invoked_subcommand is None:
            subcommand = ""
        else:
            subcommand = ":" + ctx.invoked_subcommand.__str__()

        logger.info("User %s, used command '%s%s' with arguments: %s", ctx.message.author, ctx.command.name, subcommand,
                    ctx.args[2:])

    async def on_command_error(self, ctx, error):
        error_str = ""

        if hasattr(error, "original") and isinstance(error.original, HandledError):
            return
        elif isinstance(error, commands.errors.CommandNotFound):
            return
        elif isinstance(error, commands.errors.BadArgument) or isinstance(error,
                                                                          commands.errors.MissingRequiredArgument) or (
                hasattr(error, "original") and isinstance(error.original, ValueError)):
            error_str = "Well bud, you got this far. Good job! But you still h*cked up the syntax:"

            for line in self.help_dict[ctx.command.name]:
                error_str += line

        elif hasattr(error, "original") and isinstance(error.original, request_exception.ConnectionError):
            error_str = "Unable to connect to the database. Hopefully someone is working on this..."
            await self.send_error_message("Can't connect to the GeoffreyAPI, is it offline?")

        if error_str is '':
            await self.send_error_message(
                'Geoffrey encountered unhandled exception: {} Command: **{}** Context: {}'
                    .format(error,
                            ctx.invoked_with,
                            ctx.args[1].args[2:]))

            error_message = ["```python"]
            for tb in traceback.format_tb(error.original.__traceback__):
                error_message.append(tb)

            error_message.append("```")

            error_str = bad_error_message.format(ctx.invoked_with)

            logger.error("Geoffrey encountered exception: %s", error)
            traceback.print_exception(type(error), error, error.__traceback__, file=sys.stderr)

        await ctx.message.channel.send('{} **Error Running Command:** {}'.format(
            ctx.message.author.mention, error_str))

    async def send_error_message(self, msg):
        for user_id in self.error_users:
            user = self.get_user(user_id)

            if msg is list:
                await self.send_list(user, msg)
            else:
                await user.send(msg)

    def run_command(self, command, **kwargs):
        url = self.base_url + '/api/command/{}'

        return requests.get(url=url.format(command), params=kwargs).json()

    @staticmethod
    async def send_list(ctx, send_list):
        size = 0
        msg = ""

        for s in send_list:
            if (size + len(s)) > 2000:
                await ctx.send(msg)
                msg = s
                size = len(s)
            else:
                msg = msg + '\n' + s
                size = size + len(s)

        if len(msg) > 0:
            await ctx.send(msg)

    def build_help_page(self):
        help_list = []
        largest_command_size = 0
        for command in self.command_list:
            if largest_command_size < len(command["command"]):
                largest_command_size = len(command["command"])

        for line in self.description.split("\n"):
            help_list.append(line)

        help_list.append("\nCommands:")
        for command in self.command_list:
            name = command["command"].ljust(largest_command_size + 2)
            help_list.append("   {}{}{}".format(self.prefix, name, command["help"]))

        help_list.append("\nDo ?help <command name> to get more info on any of the commands above")


        return help_list

    def build_help_dict(self):
        help_dict = {}
        for command in self.command_list:
            command_name = command["command"]

            help_list = ['```', command["help"] + "\n"]

            c = self.get_command(command_name)

            if c is not None:
                help_msg = c.help
                help_list.append(help_msg.format(self.prefix))

            help_list.append('```')

            help_dict[command_name] = help_list

        return help_dict