// public with sharing class EmailManager {
//     public EmailManager() {

//     }
// }



// public class EmailManager {
//     // Public method
//     public void sendMail(String address, String subject, String body) {
//         // Create an email message object
//         Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
//         String[] toAddresses = new String[] {address};
//         mail.setToAddresses(toAddresses);
//         mail.setSubject(subject);
//         mail.setPlainTextBody(body);
//         // Pass this email message to the built-in sendEmail method 
//         // of the Messaging class
//         Messaging.SendEmailResult[] results = Messaging.sendEmail(
//                                  new Messaging.SingleEmailMessage[] { mail });
//         // Call a helper method to inspect the returned results
//         inspectResults(results);
//     }
//     // Helper method
//     private static Boolean inspectResults(Messaging.SendEmailResult[] results) {
//         Boolean sendResult = true;
//         // sendEmail returns an array of result objects.
//         // Iterate through the list to inspect results. 
//         // In this class, the methods send only one email, 
//         // so we should have only one result.
//         System.debug('### results: ' + results);
//         System.debug('### results size: ' + results.size());
//         for (Messaging.SendEmailResult res : results) {
//             if (res.isSuccess()) {
//                 System.debug('Email sent successfully');
//             }
//             else {
//                 sendResult = false;
//                 System.debug('The following errors occurred: ' + res.getErrors());                 
//             }
//         }
//         return sendResult;
//     }
// }


//changed


//working for the user sharing but for file not for image
// global class EmailManager {

//     global static void sendEmailWithAttachment() {

//         try {
//             Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();

//             mail.setToAddresses(new String[] { 'monikakumarib007@gmail.com' });
//             mail.setSubject('Email with Attachment');
//             mail.setPlainTextBody('Please find the attachment.');

//             Messaging.EmailFileAttachment attachment = new Messaging.EmailFileAttachment();
//             // attachment.setFileName('image (5)');
//             attachment.setFileName('TestFile.txt');
//             attachment.setBody(Blob.valueOf('This is file content'));
//             // attachment.setBody(Blob.valueOf('Test Image Content'));
//             attachment.setContentType('text/plain');
//             // attachment.setContentType('image/png');


//             mail.setFileAttachments(new Messaging.EmailFileAttachment[] { attachment });

//             Messaging.SendEmailResult[] result =
//                 Messaging.sendEmail(new Messaging.SingleEmailMessage[] { mail });

//             System.debug('Result: ' + result);

//         } catch (Exception e) {
//             System.debug('Error: ' + e.getMessage());
//         }
//     }
// }



global class EmailManager {

    // Pass ContentDocumentId of the file
    global static void sendEmailWithAttachment(Id contentDocumentId) {

        try {

            // 1️⃣ Get latest version of file
            ContentVersion cv = [
                SELECT Id, Title, FileExtension, VersionData
                FROM ContentVersion
                WHERE ContentDocumentId = :contentDocumentId
                ORDER BY CreatedDate DESC
                LIMIT 1
            ];

            // 2️⃣ Create Email
            Messaging.SingleEmailMessage mail = new Messaging.SingleEmailMessage();
            mail.setToAddresses(new String[] { 'monikakumarib007@gmail.com' });
            mail.setSubject('File Attachment from Salesforce');
            mail.setPlainTextBody('Please find the attached file.');

            // 3️⃣ Create Attachment
            Messaging.EmailFileAttachment attachment = new Messaging.EmailFileAttachment();
            attachment.setFileName(cv.Title + '.' + cv.FileExtension);
            attachment.setBody(cv.VersionData);
            attachment.setContentType(getMimeType(cv.FileExtension));

            // 4️⃣ Attach File
            mail.setFileAttachments(new Messaging.EmailFileAttachment[] { attachment });

            // 5️⃣ Send Email
            Messaging.SendEmailResult[] result =
                Messaging.sendEmail(new Messaging.SingleEmailMessage[] { mail });

            if (result != null && result.size() > 0) {
                if (result[0].isSuccess()) {
                    System.debug('✅ Email Sent Successfully');
                } else {
                    System.debug('❌ Email Failed: ' + result[0].getErrors()[0].getMessage());
                }
            }

        } catch (Exception e) {
            System.debug('❌ Error: ' + e.getMessage());
        }
    }


    // Helper method to detect MIME type
    private static String getMimeType(String ext) {

        Map<String, String> mimeTypes = new Map<String, String>{
            'png' => 'image/png',
            'jpg' => 'image/jpeg',
            'jpeg' => 'image/jpeg',
            'pdf' => 'application/pdf',
            'txt' => 'text/plain',
            'doc' => 'application/msword',
            'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
            'xls' => 'application/vnd.ms-excel',
            'xlsx' => 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'
        };

        return mimeTypes.containsKey(ext.toLowerCase())
            ? mimeTypes.get(ext.toLowerCase())
            : 'application/octet-stream';
    }
}