@IsTest
private class CLMDocGenCalloutTest {
    private class CLMCalloutMock implements HttpCalloutMock {
        public HttpResponse respond(HttpRequest req) {
            HttpResponse res = new HttpResponse();
            res.setHeader('Content-Type', 'application/json');

            if (req.getMethod() == 'POST' && req.getEndpoint().contains('/documentxmlmergetasks')) {
                System.assert(req.getBody().contains('TemplateDocument'));
                System.assert(req.getBody().contains('DestinationFolder'));
                System.assert(req.getBody().contains('DeficiencyList'));
                System.assert(req.getBody().contains('&'));
                res.setStatusCode(200);
                res.setBody('{"Href":"https://uatna11.springcm.com/v2/2371cf36-eb8a-43fe-9f28-b5bbe7644397/documentxmlmergetasks/TASK-123","Status":"Queued"}');
                return res;
            }

            if (req.getMethod() == 'GET' && req.getEndpoint().contains('/documentxmlmergetasks/TASK-123')) {
                res.setStatusCode(200);
                res.setBody('{"Href":"https://uatna11.springcm.com/v2/2371cf36-eb8a-43fe-9f28-b5bbe7644397/documentxmlmergetasks/TASK-123","Status":"Completed"}');
                return res;
            }

            if (req.getMethod() == 'GET' && req.getEndpoint().contains('/documents/template-guid')) {
                res.setStatusCode(200);
                res.setHeader('Content-Type', 'application/pdf');
                res.setHeader('Content-Disposition', 'attachment; filename="GeneratedReview.pdf"');
                res.setBodyAsBlob(Blob.valueOf('pdf-bytes'));
                return res;
            }

            res.setStatusCode(404);
            res.setBody('{"Message":"Not Found"}');
            return res;
        }
    }

    @IsTest
    static void generatesDocumentAndPollsTaskStatus() {
        Appraiser_Case__c appraiserCase = new Appraiser_Case__c(
            Appraiser_Field_Review_Date__c = Date.newInstance(2026, 4, 2),
            Letter_Sent_Date__c = Date.newInstance(2026, 4, 9),
            FHA_Case_Number__c = '123-4567890',
            Appraiser_Name__c = 'Jamie Appraiser',
            Appraiser_Last_Name__c = 'Appraiser',
            Property_Street__c = '123 Main & Main <Suite 5>',
            Property_City__c = 'Denver',
            Property_State_Province__c = 'CO',
            Property_Postal_Code__c = '80202'
        );
        insert appraiserCase;

        insert new Appraiser_Case_Deficiency__c(
            Appraiser_Case__c = appraiserCase.Id,
            Deficiency_Number__c = 1,
            Description__c = 'Missing comparable sale adjustment detail.',
            Resolution__c = 'Added supporting calculations & notes.',
            Reference__c = 'VC-1'
        );

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

        Test.startTest();
        CLMDocGenCallout.CLMDocGenResponse response = CLMDocGenCallout.generateDocument(
            appraiserCase.Id,
            'https://uatna11.springcm.com/v2/2371cf36-eb8a-43fe-9f28-b5bbe7644397/documents/template-guid',
            'https://uatna11.springcm.com/v2/2371cf36-eb8a-43fe-9f28-b5bbe7644397/folders/folder-guid',
            'Review_AC-00001.docx',
            'UAT'
        );
        CLMDocGenCallout.CLMDocGenResponse taskStatus = CLMDocGenCallout.getTaskStatus('TASK-123', 'S1');
        Test.stopTest();

        System.assertEquals(true, response.success);
        System.assertEquals('TASK-123', response.documentId);
        System.assert(response.documentUrl.contains('/documentxmlmergetasks/TASK-123'));
        System.assertEquals(true, taskStatus.success);
        System.assertEquals('Task status: Completed', taskStatus.message);
    }

    @IsTest
    static void normalizesResourcePathsAndExtractsAccountIds() {
        System.assertEquals(
            '2371cf36-eb8a-43fe-9f28-b5bbe7644397',
            CLMDocGenCallout.extractAccountId('https://uatna11.springcm.com/v2/2371cf36-eb8a-43fe-9f28-b5bbe7644397/folders/folder-guid')
        );
        System.assertEquals(
            '/v2/2371cf36-eb8a-43fe-9f28-b5bbe7644397/folders/folder-guid',
            CLMDocGenCallout.normalizeResourcePath(
                'https://uatna11.springcm.com/v2/2371cf36-eb8a-43fe-9f28-b5bbe7644397/folders/folder-guid',
                'UAT'
            )
        );
        System.assertEquals(
            '/v2/' + CLMDocGenCallout.defaultAccountId('UAT') + '/folders/folder-guid',
            CLMDocGenCallout.normalizeResourcePath('/folders/folder-guid', 'UAT')
        );
    }

    @IsTest
    static void downloadsGeneratedDocumentThroughDownloadCredential() {
        Test.setMock(HttpCalloutMock.class, new CLMCalloutMock());

        Test.startTest();
        CLMDocGenCallout.DownloadedDocument downloaded = CLMDocGenCallout.downloadDocument(
            'https://apiuatna11.springcm.com/v2/bccae332-c7db-4892-ab85-257df0f70fea/documents/template-guid',
            'UAT'
        );
        Test.stopTest();

        System.assertEquals('GeneratedReview.pdf', downloaded.fileName);
        System.assertEquals('application/pdf', downloaded.contentType);
        System.assertNotEquals(null, downloaded.body);
    }

    @IsTest
    static void buildsPreviewXmlAndRequestBody() {
        Appraiser_Case__c appraiserCase = new Appraiser_Case__c(
            Appraiser_Field_Review_Date__c = Date.newInstance(2026, 4, 2),
            Letter_Sent_Date__c = Date.newInstance(2026, 4, 9),
            FHA_Case_Number__c = '123-4567890',
            Appraiser_Name__c = 'Jamie Appraiser',
            Appraiser_Last_Name__c = 'Appraiser',
            Property_Street__c = '245 Lexington Ave',
            Property_City__c = 'New York',
            Property_State_Province__c = 'NY',
            Property_Postal_Code__c = '10016',
            Property_Country__c = 'USA'
        );
        insert appraiserCase;

        insert new Appraiser_Case_Deficiency__c(
            Appraiser_Case__c = appraiserCase.Id,
            Deficiency_Number__c = 1,
            Description__c = 'Missing comparable sale adjustment detail.',
            Resolution__c = 'Added supporting calculations.',
            Reference__c = 'VC-1'
        );

        String dataXml = CLMDocGenCallout.buildDataXmlForCase(appraiserCase.Id);
        String requestBodyJson = CLMDocGenCallout.buildRequestBodyJson(
            appraiserCase.Id,
            'https://apiuatna11.springcm.com/v2/bccae332-c7db-4892-ab85-257df0f70fea/documents/template-guid',
            'https://apiuatna11.springcm.com/v2/bccae332-c7db-4892-ab85-257df0f70fea/folders/folder-guid',
            'Review_AC-000002.docx'
        );

        System.assert(dataXml.contains('<LetterSentDate>'));
        System.assert(dataXml.contains('<FHACaseNumber>123-4567890</FHACaseNumber>'));
        System.assert(dataXml.contains('<Reference>VC-1</Reference>'));
        System.assert(requestBodyJson.contains('"DataXML"'));
        System.assert(requestBodyJson.contains('Review_AC-000002.docx'));
        System.assert(requestBodyJson.contains('template-guid'));
    }
}