import { Injectable, InjectionToken, Injector } from '@angular/core';
import {
  HttpEvent,
  HttpInterceptor,
  HttpHandler,
  HttpRequest,
} from '@angular/common/http';
import { Observable } from 'rxjs';

export class ModuleHttpInterceptor implements HttpInterceptor {
  constructor(private readonly baseUrl: string) {}
  intercept(
    req: HttpRequest<any>,
    next: HttpHandler
  ): Observable<HttpEvent<any>> {
    let baseUrl = this.baseUrl;
    if (!req.url.startsWith('http')) {
      const baseUrlEndsWithSlash = baseUrl.endsWith('/');
      const urlStartWithSlash = req.url.startsWith('/');
      let url = req.url;

      if (baseUrlEndsWithSlash) {
        baseUrl = baseUrl.slice(0, -1);
      }

      if (urlStartWithSlash) {
        url = url.slice(1);
      }

      const apiReq = req.clone({ url: `${baseUrl}/${url}` });
      return next.handle(apiReq);
    }

    return next.handle(req);
  }
}