import { Injectable } from '@angular/core';
import {
  HttpRequest,
  HttpHandler,
  HttpEvent,
  HttpInterceptor
} from '@angular/common/http';
import { Observable } from 'rxjs';
import { MessageService } from './message.service';
import { TokenService } from './token.service';
import { serviceBaseUrl } from './config';


@Injectable()
export class AuthHandlerInterceptor implements HttpInterceptor {

  constructor(private tokenService: TokenService, private messageService: MessageService) {}

  intercept(request: HttpRequest<unknown>, next: HttpHandler): Observable<HttpEvent<unknown>> {
    const token = localStorage.getItem(TokenService.Id_AuthToken_Key)
    if (request.url.includes(serviceBaseUrl) && token) {
      this.messageService.add("start refresh of tokens")
      this.tokenService.refresh()

      this.messageService.add("api request intercepted")
      const clone = request.clone({
        setHeaders: { Authorization: `Bearer ${token}`}
      })
      return next.handle(clone)
    }

    return next.handle(request);
  }
}