import { Injectable } from '@angular/core';
import { IPublicClientApplication, PublicClientApplication, InteractionType, LogLevel } from '@azure/msal-browser';
import { MsalInterceptorConfiguration, MsalGuardConfiguration  } from '@azure/msal-angular';

declare let CONFIG: any;
const isIE = window.navigator.userAgent.indexOf("MSIE ") > -1 || window.navigator.userAgent.indexOf("Trident/") > -1;

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

    static loggerCallback(logLevel: LogLevel, message: string) {
        // console.log(message);
    }

    static MSALInstanceFactory(): IPublicClientApplication {
        const auth = CONFIG.AZURE.auth;

        return new PublicClientApplication({
          auth: {
            clientId: auth.clientId,
            authority: auth.authority,
            redirectUri: auth.redirectUri,
            postLogoutRedirectUri: auth.postLogoutRedirectUri,
            knownAuthorities: auth.knownAuthorities
          },
          cache: {
            cacheLocation: auth.cacheLocation,
            storeAuthStateInCookie: isIE, // set to true for IE 11
          },
          system: {
            loggerOptions: {
              loggerCallback : AzureAuthUtils.loggerCallback,
              logLevel: LogLevel.Info,
              piiLoggingEnabled: false
            }
          }
        });
      }

      static MSALInterceptorConfigFactory(): MsalInterceptorConfiguration {
        const apiConfig = CONFIG.AZURE.apiConfig;
        const protectedResourceMap = new Map<string, Array<string>>();
          protectedResourceMap.set(apiConfig.uri, apiConfig.scopes);
        return {
          interactionType: InteractionType.Redirect,
          protectedResourceMap,
        };
      }

      static MSALGuardConfigFactory(): MsalGuardConfiguration {
        const apiConfig = CONFIG.AZURE.apiConfig;
        return {
          interactionType: InteractionType.Redirect,
          authRequest: {
            scopes: [...apiConfig.scopes],
          },
          loginFailedRoute: '/'
        };
      }
}