import "reflect-metadata";
import type { Message } from "@fluxerjs/core";

export const GUARDS_KEY = Symbol("fluxer:guards");
export type Guard = (msg: Message) => boolean | Promise<boolean>;

export function RequireNonBot(): ClassDecorator {
  return (target) => {
    const guards: Guard[] = Reflect.getMetadata(GUARDS_KEY, target) ?? [];
    guards.push((msg) => !msg.author.bot);
    Reflect.defineMetadata(GUARDS_KEY, guards, target);
  };
}

export function RequirePrefix(prefix: string): ClassDecorator {
  return (target) => {
    const guards: Guard[] = Reflect.getMetadata(GUARDS_KEY, target) ?? [];
    guards.push((msg) => msg.content.startsWith(prefix));
    Reflect.defineMetadata(GUARDS_KEY, guards, target);
  };
}