@IsTest
private class FileEventQueueableHandlerTest {

    /* ============================================================
       TEST 1 – Single ContentVersion
       ============================================================ */
    @IsTest
    static void testSingleContentVersionProcessing() {

        System.debug('===== TEST START : Single ContentVersion =====');

        // Create test Account for FirstPublishLocationId
        Account acc = new Account(Name = 'Test Account');
        insert acc;
        System.debug('Inserted Account Id: ' + acc.Id);

        // Create ContentVersion
        ContentVersion cv = new ContentVersion(
            Title = 'TestFile',
            PathOnClient = 'TestFile.txt',
            VersionData = Blob.valueOf('This is test file content'),
            FirstPublishLocationId = acc.Id
        );
        insert cv;

        System.debug('Inserted ContentVersion Id: ' + cv.Id);

        // Fetch inserted ContentVersion again to get ContentDocumentId
        cv = [
            SELECT Id, ContentDocumentId
            FROM ContentVersion
            WHERE Id = :cv.Id
        ];

        System.debug('Fetched ContentDocumentId: ' + cv.ContentDocumentId);

        List<Id> cvIds = new List<Id>{ cv.Id };

        Test.startTest();

        System.enqueueJob(new FileEventQueueableHandler(cvIds));

        Test.stopTest();

        // Verify File_Event__c created
        List<File_Event__c> events = [
            SELECT Id, File_Id__c, HIC_FilesME__Title__c
            FROM File_Event__c
            WHERE File_Id__c = :cv.Id
        ];

        System.debug('Inserted File_Event__c count: ' + events.size());

        System.assertEquals(1, events.size());
        System.assertEquals('TestFile', events[0].HIC_FilesME__Title__c);

        System.debug('===== TEST END : Single ContentVersion =====');
    }


    /* ============================================================
       TEST 2 – Multiple ContentVersions (Bulk)
       ============================================================ */
    @IsTest
    static void testMultipleContentVersionProcessing() {

        System.debug('===== TEST START : Multiple ContentVersions =====');

        Account acc = new Account(Name = 'Bulk Account');
        insert acc;

        List<ContentVersion> cvList = new List<ContentVersion>();

        for (Integer i = 0; i < 3; i++) {
            cvList.add(new ContentVersion(
                Title = 'BulkFile_' + i,
                PathOnClient = 'BulkFile_' + i + '.txt',
                VersionData = Blob.valueOf('Bulk content ' + i),
                FirstPublishLocationId = acc.Id
            ));
        }

        insert cvList;

        System.debug('Inserted ContentVersion count: ' + cvList.size());

        List<Id> cvIds = new List<Id>();
        for (ContentVersion cv : cvList) {
            cvIds.add(cv.Id);
        }

        Test.startTest();
        System.enqueueJob(new FileEventQueueableHandler(cvIds));
        Test.stopTest();

        List<File_Event__c> events = [
            SELECT Id
            FROM File_Event__c
            WHERE HIC_FilesME__Record_Id__c = :acc.Id
        ];

        System.debug('Inserted File_Event__c count: ' + events.size());

        System.assertEquals(3, events.size());

        System.debug('===== TEST END : Multiple ContentVersions =====');
    }


    /* ============================================================
       TEST 3 – Empty List
       ============================================================ */
    @IsTest
    static void testEmptyListProcessing() {

        System.debug('===== TEST START : Empty List Scenario =====');

        Test.startTest();
        System.enqueueJob(new FileEventQueueableHandler(new List<Id>()));
        Test.stopTest();

        // No records should be created
        List<File_Event__c> events = [
            SELECT Id FROM File_Event__c
        ];

        System.debug('File_Event__c count after empty run: ' + events.size());

        System.assertEquals(0, events.size());

        System.debug('===== TEST END : Empty List Scenario =====');
    }
}