# =====IMPORTS=====
# Future imports
from __future__ import annotations

# Third-party imports
import discord

# Own imports
from suzybot.frank import Module, default, command

# Typing imports
from typing import TYPE_CHECKING
if TYPE_CHECKING:
    # Built-in imports
    from typing import List

    # Third-party imports
    from discord.abc import User, Messageable


class HelpMod(Module):
    """
    This module sends a help message in a given channel with info about all
    other modules.
    """

    PREFIX = 'help'
    NAME = 'help'
    HELP = 'Shows help info about all modules'

    def pre_start(self):
        self.theme = discord.Color.dark_green()

    @default(help_str='Show help about all modules.')
    async def send_all(self, author: User, channel: Messageable, mid: int):
        embed = discord.Embed(colour=self.theme)
        embed.set_author(name='Suzy')

        for mod in self._client._modules:
            embed.add_field(name=mod.NAME, value=mod.HELP, inline=False)

        await channel.send(embed=embed)

    @command(cmd='.+', help_str='Show help about a certain module.')
    async def show_module_help(self, cmd: List[str], author: User,
                               channel: Messageable, mid: int):
        # Exit if no arguments are given
        if not cmd:
            return

        mod_name = cmd[0].lower()
        mod = next((mod for mod in self._client._modules
                    if mod.NAME.lower() == mod_name), None)

        if mod:
            embed = discord.Embed(colour=self.theme)

            if mod._DEFAULT:
                embed.add_field(name='default', value=mod._help, inline=False)

            for cmd in mod._COMMANDS:
                embed.add_field(name=cmd._command, value=mod._help,
                                inline=False)

            await channel.send(embed=embed)