/**
 * This class contains unit tests for validating the behavior of Apex classes
 * and triggers.
 *
 * Unit tests are class methods that verify whether a particular piece
 * of code is working properly. Unit test methods take no arguments,
 * commit no data to the database, and are flagged with the testMethod
 * keyword in the method definition.
 *
 * All test methods in an org are executed whenever Apex code is deployed
 * to a production org to confirm correctness, ensure code
 * coverage, and prevent regressions. All Apex classes are
 * required to have at least 75% code coverage in order to be deployed
 * to a production org. In addition, all triggers must have some code coverage.
 * 
 * The @isTest class annotation indicates this class only contains test
 * methods. Classes defined with the @isTest annotation do not count against
 * the org size limit for all Apex scripts.
 *
 * See the Apex Language Reference for more information about Testing and Code Coverage.
 */
    @isTest
    public  class DropboxAuthTest {
       
                private class DropboxTokenMock implements HttpCalloutMock {

                public HTTPResponse respond(HTTPRequest req) {

                    HttpResponse res = new HttpResponse();
                    res.setStatusCode(200);

                    // Token endpoint call
                    if (req.getMethod() == 'POST') {
                        res.setBody('{"access_token":"testAccessToken","refresh_token":"testRefreshToken"}');
                    }

                    // fetchUserInfo call
                    else if (req.getMethod() == 'GET') {
                        res.setBody('{"email":"testuser@dropbox.com"}');
                    }

                    return res;
                }
            }

        @isTest
        static void testGetAccessTokenSuccess() {

            // Set mock
            Test.setMock(HttpCalloutMock.class, new DropboxTokenMock());

            // Create instance of your auth class
            // Replace DropboxAuth with your actual class name
            DropboxAuth auth = new DropboxAuth();

            Test.startTest();
            auth.getAccessToken(
                'dummyCode',
                'Dropbox',
                true,
                        UserInfo.getUserId()
            );
            Test.stopTest();

            // If OAuthTokenManager.storeToken inserts record,
            // you can optionally verify it here with SOQL

            System.assert(true); // Method executed successfully
        }

    
        public class RefreshTokenMock implements HttpCalloutMock {
            
            public HTTPResponse respond(HTTPRequest req) {
                HttpResponse res = new HttpResponse();
                res.setStatusCode(200);
                res.setHeader('Content-Type', 'application/json');
                res.setBody('{"access_token":"mock_access_token_123","token_type":"Bearer","expires_in":3600}');
                return res;
            }
        }

        
            @IsTest
            static void testRefreshAccessToken() {
                
                // Set Mock
                Test.setMock(HttpCalloutMock.class, new RefreshTokenMock());
                
                // Create instance of your class
                DropboxAuth obj = new DropboxAuth();
                
                Test.startTest();
                String token = obj.refreshAccessToken('dummy_refresh_token');
                Test.stopTest();
                
                // Assert
                System.assertEquals('mock_access_token_123', token);
            }
       


    
    }