import logging
from datetime import datetime, timedelta
from os import getpid
from time import time
from typing import List, Union

import pyrogram
from libbot import config_get
from libbot.i18n import in_every_locale
from libbot.i18n.sync import _
from pyrogram.client import Client
from pyrogram.errors import BadRequest
from pyrogram.handlers.message_handler import MessageHandler
from pyrogram.raw.all import layer
from pyrogram.types import (
    BotCommand,
    BotCommandScopeAllChatAdministrators,
    BotCommandScopeAllGroupChats,
    BotCommandScopeAllPrivateChats,
    BotCommandScopeChat,
    BotCommandScopeChatAdministrators,
    BotCommandScopeChatMember,
    BotCommandScopeDefault,
)
from ujson import dumps, loads

from classes.commandset import CommandSet
from classes.pyrocommand import PyroCommand
from modules.scheduler import scheduler

logger = logging.getLogger(__name__)


class PyroClient(Client):
    def __init__(self):
        with open("config.json", "r", encoding="utf-8") as f:
            config = loads(f.read())
        super().__init__(
            name="bot_client",
            api_id=config["bot"]["api_id"],
            api_hash=config["bot"]["api_hash"],
            bot_token=config["bot"]["bot_token"],
            workers=config["bot"]["workers"],
            plugins=dict(root="plugins", exclude=config["disabled_plugins"]),
            sleep_threshold=120,
        )
        self.owner = config["bot"]["owner"]
        self.commands: List[PyroCommand] = []
        self.scoped_commands = config["bot"]["scoped_commands"]
        self.start_time = 0

    async def start(self):
        await super().start()

        self.start_time = time()

        logger.info(
            "Bot is running with Pyrogram v%s (Layer %s) and has started as @%s on PID %s.",
            pyrogram.__version__,
            layer,
            self.me.username,
            getpid(),
        )

        try:
            await self.send_message(
                chat_id=await config_get("chat_id", "reports"),
                text=f"Bot started PID `{getpid()}`",
            )

            scheduler.add_job(
                self.register_commands,
                trigger="date",
                run_date=datetime.now() + timedelta(seconds=5),
                kwargs={"command_sets": await self.collect_commands()},
            )

            scheduler.start()
        except BadRequest:
            logger.warning("Unable to send message to report chat.")

    async def stop(self):
        try:
            await self.send_message(
                chat_id=await config_get("chat_id", "reports"),
                text=f"Bot stopped with PID `{getpid()}`",
            )
        except BadRequest:
            logger.warning("Unable to send message to report chat.")
        await super().stop()
        logger.warning("Bot stopped with PID %s.", getpid())

    async def collect_commands(self) -> Union[List[CommandSet], None]:
        """Gather list of the bot's commands

        ### Returns:
            * `List[CommandSet]`: List of the commands' sets
        """
        command_sets = None

        # If config get bot.scoped_commands is true - more complicated
        # scopes system will be used instead of simple global commands
        if self.scoped_commands:
            scopes = {}
            command_sets = []

            # Iterate through all commands in config
            for command, contents in (await config_get("commands")).items():
                # Iterate through all scopes of a command
                for scope in contents["scopes"]:
                    if dumps(scope) not in scopes:
                        scopes[dumps(scope)] = {"_": []}

                    # Add command to the scope's flattened key in scopes dict
                    scopes[dumps(scope)]["_"].append(
                        BotCommand(command, _(command, "commands"))
                    )

                    for locale, string in (
                        await in_every_locale(command, "commands")
                    ).items():
                        if locale not in scopes[dumps(scope)]:
                            scopes[dumps(scope)][locale] = []

                        scopes[dumps(scope)][locale].append(BotCommand(command, string))

            # Iterate through all scopes and its commands
            for scope, locales in scopes.items():
                # Make flat key a dict again
                scope_dict = loads(scope)

                # Create object with the same name and args from the dict
                try:
                    scope_obj = globals()[scope_dict["name"]](
                        **{
                            key: value
                            for key, value in scope_dict.items()
                            if key != "name"
                        }
                    )
                except NameError:
                    logger.error(
                        "Could not register commands of the scope '%s' due to an invalid scope class provided!",
                        scope_dict["name"],
                    )
                    continue
                except TypeError:
                    logger.error(
                        "Could not register commands of the scope '%s' due to an invalid class arguments provided!",
                        scope_dict["name"],
                    )
                    continue

                # Add set of commands to the list of the command sets
                for locale, commands in locales.items():
                    if locale == "_":
                        command_sets.append(
                            CommandSet(commands, scope=scope_obj, language_code="")
                        )
                        continue
                    command_sets.append(
                        CommandSet(commands, scope=scope_obj, language_code=locale)
                    )

            logger.info("Registering the following command sets: %s", command_sets)

        else:
            # This part here looks into the handlers and looks for commands
            # in it, if there are any. Then adds them to self.commands
            for handler in self.dispatcher.groups[0]:
                if isinstance(handler, MessageHandler):
                    for entry in [handler.filters.base, handler.filters.other]:
                        if hasattr(entry, "commands"):
                            for command in entry.commands:
                                logger.info("I see a command %s in my filters", command)
                                self.add_command(command)

        return command_sets

    def add_command(
        self,
        command: str,
    ):
        """Add command to the bot's internal commands list

        ### Args:
            * command (`str`)
        """
        self.commands.append(
            PyroCommand(
                command,
                _(command, "commands"),
            )
        )
        logger.info(
            "Added command '%s' to the bot's internal commands list",
            command,
        )

    async def register_commands(
        self, command_sets: Union[List[CommandSet], None] = None
    ):
        """Register commands stored in bot's 'commands' attribute"""

        if command_sets is None:
            commands = [
                BotCommand(command=command.command, description=command.description)
                for command in self.commands
            ]

            logger.info(
                "Registering commands %s with a default scope 'BotCommandScopeDefault'"
            )

            await self.set_bot_commands(commands)
            return

        for command_set in command_sets:
            logger.info(
                "Registering command set with commands %s and scope '%s' (%s)",
                command_set.commands,
                command_set.scope,
                command_set.language_code,
            )
            await self.set_bot_commands(
                command_set.commands,
                command_set.scope,
                language_code=command_set.language_code,
            )

    async def remove_commands(self, command_sets: Union[List[CommandSet], None] = None):
        """Remove commands stored in bot's 'commands' attribute"""

        if command_sets is None:
            logger.info(
                "Removing commands with a default scope 'BotCommandScopeDefault'"
            )
            await self.delete_bot_commands(BotCommandScopeDefault())
            return

        for command_set in command_sets:
            logger.info(
                "Removing command set with scope '%s' (%s)",
                command_set.scope,
                command_set.language_code,
            )
            await self.delete_bot_commands(
                command_set.scope,
                language_code=command_set.language_code,
            )