import functools
import logging

import discord

from ..core.config import CONFIG, FileCommand, InfoCommand

_logger = logging.getLogger(__name__)


def reply_private(interaction: discord.Interaction, name: str) -> bool:
    _logger.debug(f"User {interaction.user.name}({interaction.user.id}) used /{name}")

    # öffentliche Antwort in DM channels und in "allowed" channels
    in_dm_channel = interaction.channel is not None and isinstance(
        interaction.channel, discord.DMChannel
    )
    in_allowed_channel = interaction.channel_id in CONFIG.ev_info.channels

    # private Antwort sonst
    return not (in_dm_channel or in_allowed_channel)


@functools.singledispatch
def make_command(command) -> discord.app_commands.Command:
    raise NotImplementedError


@make_command.register
def _(command: FileCommand) -> discord.app_commands.Command:
    @discord.app_commands.command(
        name=CONFIG.command_prefix + command.name,
        description=command.description,
    )
    async def cmd(interaction: discord.Interaction) -> None:
        if (file := await command.as_discord_file) is not None:
            await interaction.response.send_message(
                content=command.content,
                suppress_embeds=True,
                ephemeral=reply_private(interaction, command.name),
                file=file,
            )

        else:
            await interaction.response.send_message(
                content=CONFIG.command_failed,
                ephemeral=True,
            )

    return cmd


@make_command.register
def _(command: InfoCommand) -> discord.app_commands.Command:
    @discord.app_commands.command(
        name=CONFIG.command_prefix + command.name,
        description=command.description,
    )
    async def cmd(interaction: discord.Interaction) -> None:
        await interaction.response.send_message(
            content=command.content,
            suppress_embeds=True,
            ephemeral=reply_private(interaction, command.name),
        )

    return cmd


COMMANDS = [
    make_command(attr)
    for name in CONFIG.ev_info.model_dump().keys()
    if isinstance(attr := getattr(CONFIG.ev_info, name), InfoCommand)
]