import * as plugins from '../../plugins.js';
import { EmailService } from './classes.emailservice.js';
import { logger } from '../../logger.js';
import { Email, type IEmailOptions, type IAttachment } from '../core/classes.email.js';

export class ApiManager {
  public emailRef: EmailService;
  public typedRouter = new plugins.typedrequest.TypedRouter();

  constructor(emailRefArg: EmailService) {
    this.emailRef = emailRefArg;
    this.emailRef.typedrouter.addTypedRouter(this.typedRouter);

    // Register API endpoints
    this.registerApiEndpoints();
  }

  /**
   * Register API endpoints for email functionality
   */
  private registerApiEndpoints() {
    // Register the SendEmail endpoint
    this.typedRouter.addTypedHandler<plugins.servezoneInterfaces.platformservice.mta.IReq_SendEmail>(
      new plugins.typedrequest.TypedHandler('sendEmail', async (requestData) => {
        // Build attachments array
        const attachments: IAttachment[] = [];
        if (requestData.attachments) {
          for (const attachment of requestData.attachments) {
            attachments.push({
              filename: attachment.name,
              content: Buffer.from(attachment.binaryAttachmentString, 'binary'),
              contentType: 'application/octet-stream'
            });
          }
        }
        
        // Create Email instance
        const emailOptions: IEmailOptions = {
          from: requestData.from,
          to: requestData.to,
          subject: requestData.title,
          text: requestData.body,
          attachments
        };
        
        const mailToSend = new Email(emailOptions);

        // Send email through the service which will route to the appropriate connector
        const emailId = await this.emailRef.sendEmail(mailToSend, undefined, {});
        
        logger.log(
          'info',
          `sent an email to ${requestData.to} with subject '${mailToSend.subject}'`,
          {
            eventType: 'sentEmail',
            email: {
              to: requestData.to,
              subject: mailToSend.subject,
            },
          }
        );
        
        return {
          responseId: emailId,
        };
      })
    );

    // Add endpoint to check email status
    this.typedRouter.addTypedHandler<plugins.servezoneInterfaces.platformservice.mta.IReq_CheckEmailStatus>(
      new plugins.typedrequest.TypedHandler('checkEmailStatus', async (requestData) => {
        // Check if we can get status - temporarily disabled during transition
        // Simplified response during migration
        const detailedStatus = {
          status: 'UNKNOWN',
          details: {
            message: 'Email status checking is not available during system migration'
          }
        };
          
        // Convert to the expected API response format
        const apiResponse: plugins.servezoneInterfaces.platformservice.mta.IReq_CheckEmailStatus['response'] = {
          status: detailedStatus.status.toString(), // Convert enum to string
          details: {
            message: detailedStatus.details?.message || 
                    `Status: ${detailedStatus.status}`
          }
        };
        return apiResponse;
      })
    );

    // Add statistics endpoint
    this.typedRouter.addTypedHandler<plugins.servezoneInterfaces.platformservice.mta.IReq_GetEMailStats>(
      new plugins.typedrequest.TypedHandler('getEmailStats', async () => {
        return this.emailRef.getStats();
      })
    );
  }
}