import type { Client, Message } from "discord.js";
import { readdir } from "fs/promises";

const CMD_PREFIX = ".";

export interface Command {
    name: string,
    description: string,
    execute: (message: Message) => void | Promise<void>
}

export class CommandService {
    private client: Client
    private registry: Record<string, Command> = {}

    constructor(client: Client) {
        this.client = client;
    }

    async init() {
        const commands = await Promise.all(
            (await readdir(`${import.meta.dir}/registry`)).map(async file => (await import(`./registry/${file}`)).default as Command)
        );
        for (const command of commands)
            this.registry[command.name] = command;
    };

    parse(message: Message): Command | undefined {
        if (!message.content.startsWith(CMD_PREFIX)) return;
        const name = message.content.slice(CMD_PREFIX.length).split(/\s+/)[0];
        return this.registry[name ?? ""];
    }
}