import {
  Inject,
  Injectable,
  LOCALE_ID,
} from '@angular/core';
import { AuthorizationService } from '@rxap/authorization';
// eslint-disable-next-line @nx/enforce-module-boundaries
import { ClickOnLink } from '@rxap/browser-utilities';
import { ConfigService } from '@rxap/config';
import {
  Environment,
  RXAP_ENVIRONMENT,
} from '@rxap/environment';
import { JoinPath } from '@rxap/utilities';
import { firstValueFrom } from 'rxjs';

export interface ExternalApps {
  image?: string;
  label: string;
  href: string;
  empty?: false;
  hidden?: boolean;
  id?: string;
  permissions: string[];
}

@Injectable({ providedIn: 'root' })
export class AppUrlService {

  private _apps: Array<ExternalApps>;

  constructor(
    private readonly config: ConfigService,
    @Inject(LOCALE_ID)
    private readonly localeId: string,
    private readonly authorizationService: AuthorizationService,
    @Inject(RXAP_ENVIRONMENT)
    private readonly environment: Environment,
  ) {
    this._apps = this.config.get('navigation.apps', []);
  }

  public getApp(appId: string): ExternalApps | null {
    return this._apps.find(app => app.id === appId) ?? null;
  }

  public getAppUrl(appId: string, path: string, infix: string | null = this.getPathPrefix()): string | null {

    const app = this.getApp(appId);

    if (app) {
      return JoinPath(app.href, infix, path);
    }

    return null;

  }

  public getAppUrlOrThrow(appId: string, path: string): string {
    const url = this.getAppUrl(appId, path);
    if (url) {
      return url;
    }
    throw new Error(`Could not find app with id "${ appId }"`);
  }

  public navigate(appId: string, path: string): void {

    const url = this.getAppUrl(appId, path);

    if (url) {
      ClickOnLink(url);
    }

  }

  public async getAppList(): Promise<Array<ExternalApps>> {
    const appList = this
      ._apps
      .filter(app => !app.hidden)
      .map(app => ({
        ...app,
        href: JoinPath(app.href, this.getPathPrefix()),
      }));

    const filteredAppList: Array<ExternalApps> = [];
    for (const app of appList) {
      if (await firstValueFrom(this.authorizationService.hasPermission$(app.permissions))) {
        filteredAppList.push(app);
      }
    }
    return filteredAppList;
  }

  private getPathPrefix(): string {
    if (this.environment.production && this.localeId) {
      return this.localeId.replace(/-.+$/, '');
    }
    return '';
  }

}