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

# Third-party imports
from discord import Embed

# Own imports
from .. import Module, default, regex_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"

    @default(help_str="Show help about all modules.")
    async def send_all(self, author: User, channel: Messageable, mid: int):
        embed = Embed()

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

        await channel.send(embed=embed)

    @regex_command(pattern=".+", help_str="Show help about a certain module.")
    async def show_module_help(
        self,
        prefix: str,
        cmd: List[str],
        author: User,
        channel: Messageable,
        mid: int,
    ):
        # Yes, this command just ignores cmd at the moment
        mod_name = prefix.lower()
        mod = next(
            (
                mod
                for mod in self._client._modules
                if mod.NAME.lower() == mod_name
            ),
            None,
        )

        if mod:
            embed = Embed()

            if mod.default:
                embed.add_field(
                    name="default", value=mod.default.help_str, inline=False
                )

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

            await channel.send(embed=embed)