import { CHANNEL, CHANNEL_TOKEN } from '@allianz/taly-core';
import { Inject, Injectable, Optional } from '@angular/core';
import { BackLinkAdapterService } from './back-link-adapter.service';

@Injectable({
  providedIn: 'root'
})
export class BackLinkUtilsService {
  private isRetailChannel: boolean;

  constructor(
    @Inject(CHANNEL_TOKEN) channel: CHANNEL,
    @Optional() private backLinkAdapterService: BackLinkAdapterService
  ) {
    this.isRetailChannel = channel === CHANNEL.RETAIL;
  }

  isBackLinkFeatureActiveForStage(hideBackLink: boolean | undefined): boolean {
    return Boolean(
      this.isRetailChannel &&
        !hideBackLink &&
        this.backLinkAdapterService?.backLinkData?.stageLinkLabel
    );
  }

  isBackLinkFeatureActiveForActions(isLastPage: boolean): boolean {
    return Boolean(this.isRetailChannel && isLastPage && this.hasNextButtonLabel());
  }

  private hasNextButtonLabel(): boolean {
    const nextButtonLabel = this.backLinkAdapterService?.backLinkData?.nextButtonLabel;
    if (Array.isArray(nextButtonLabel) && nextButtonLabel.length > 0) {
      return true;
    }

    return Boolean(nextButtonLabel);
  }
}