import { Injectable, CanActivate, ExecutionContext } from "@nestjs/common";
import { Reflector } from "@nestjs/core";

@Injectable()
export class RolesGuard implements CanActivate {
  constructor(private readonly reflector: Reflector) {}
  canActivate(context: ExecutionContext): boolean {
    const roles = this.reflector.getAllAndOverride<string[]>("role", [
      context.getHandler(),
      context.getClass(),
    ]);
    if (!roles?.length) {
      return false;
    }
    const request = context.switchToHttp().getRequest();
    const role = request.user?.role;
    if (!role) {
      return false;
    }
    const userRoles = String(role).split(",");
    return this.validateRoles(roles, userRoles);
  }

  validateRoles(roles: string[], userRoles: string[]) {
    return roles.some((role) => userRoles.includes(role));
  }
}