@IsTest
public with sharing class SharePointAuthTest {
   
  
    public class MicrosoftAuthMock implements HttpCalloutMock {

        public HTTPResponse respond(HTTPRequest req) {

            System.debug('Mock Endpoint >>> ' + req.getEndpoint());
            System.debug('Mock Body >>> ' + req.getBody());

            HttpResponse res = new HttpResponse();
            res.setHeader('Content-Type', 'application/json');

            if(req.getEndpoint().contains('token')){
                // Token API response
                res.setStatusCode(200);
                res.setBody('{"access_token":"testAccessToken","refresh_token":"testRefreshToken"}');
            }
            else{
                // fetchUserInfo API response
                res.setStatusCode(200);
                res.setBody('{"userPrincipalName":"testuser@test.com"}');
            }

            return res;
        }
    }


    @isTest
    static void testGetAccessToken() {

        // Register mock
        Test.setMock(HttpCalloutMock.class, new MicrosoftAuthMock());

        String code = 'testCode123';
        String storage = 'SharePoint';
        Boolean isAdminCred = true;
        String userId = UserInfo.getUserId();

        System.debug('Input Code >>> ' + code);
        System.debug('Input Storage >>> ' + storage);

        Test.startTest();

          SharePointAuth auth = new SharePointAuth();
          auth.getAccessToken(code, storage, isAdminCred, userId);

        Test.stopTest();

        System.debug('getAccessToken executed successfully');

        System.assert(true, 'Method executed without exception');
    }

  
    public class RefreshTokenMock implements HttpCalloutMock {

        public HTTPResponse respond(HTTPRequest req) {

            System.debug('Mock Endpoint >>> ' + req.getEndpoint());
            System.debug('Mock Body >>> ' + req.getBody());

            HttpResponse res = new HttpResponse();
            res.setHeader('Content-Type','application/json');

            if(req.getBody().contains('refresh_token')){
                res.setStatusCode(200);
                res.setBody('{"access_token":"newAccessToken123"}');
            }else{
                res.setStatusCode(400);
                res.setBody('{"error":"invalid_request"}');
            }

            return res;
        }
    }


     @isTest
    static void testRefreshAccessToken_Success() {

        Test.setMock(HttpCalloutMock.class, new RefreshTokenMock());

        String refreshToken = 'testRefreshToken';

        System.debug('Refresh Token Input >>> ' + refreshToken);

        Test.startTest();

        SharePointAuth auth = new SharePointAuth();
        String token = auth.refreshAccessToken(refreshToken);
        SharePointAuth.revokeAccessToken(refreshToken);

        Test.stopTest();
           System.debug('Returned Token >>> ' + token);

        System.assertEquals('newAccessToken123', token);
    }



}