import { Emitter } from "@noya-app/emitter";
import { Observable } from "@noya-app/observable";
import { uuid } from "@noya-app/noya-utils";

export type ImagePickerRequest = {
  id: string;
};

export type ImagePickerResponse = {
  id: string;
  resourceStableId?: string;
};

export class ImagePickerManager {
  requestEmitter = new Emitter<[ImagePickerRequest]>();
  responseEmitter = new Emitter<[ImagePickerResponse]>();
  isAvailable$ = new Observable(false);

  setIsAvailable(isAvailable: boolean) {
    this.isAvailable$.set(isAvailable);
  }

  async pickImage(): Promise<string | undefined> {
    const id = uuid();

    return new Promise<string | undefined>((resolve) => {
      const unsubscribe = this.responseEmitter.addListener((response) => {
        if (response.id !== id) return;

        unsubscribe();
        resolve(response.resourceStableId);
      });

      this.requestEmitter.emit({ id });
    });
  }

  handleResponse(response: ImagePickerResponse) {
    this.responseEmitter.emit(response);
  }
}