import { Injectable, Inject } from '@nestjs/common';
import { ListMasterExtension } from './list-master-extension.interface';

@Injectable()
export class ListMasterEngine {
  private extensions = new Map<string, ListMasterExtension>();

  constructor(
    @Inject('LIST_MASTER_EXTENSIONS') extensions: ListMasterExtension[],
  ) {
    extensions.forEach(ext => this.extensions.set(ext.name, ext));
  }

  async execute(name: string, payload: any) {
    const ext = this.extensions.get(name) || this.extensions.get('GLOBAL');
    if (!ext) throw new Error(`ListMaster extension not found: ${name}`);
    return ext.fetchDropdown({ type: name, ...payload });
  }
}