import { EventEmitter2 } from '@nestjs/event-emitter';
import { MicrosoftAuthService } from '../auth/microsoft-auth.service';
import { MicrosoftOutlookConfig } from '../../interfaces/config/outlook-config.interface';
import { Message, ChangeNotification, Subscription } from '@microsoft/microsoft-graph-types';
import { OutlookWebhookSubscriptionRepository } from '../../repositories/outlook-webhook-subscription.repository';
export declare class EmailService {
    private readonly microsoftAuthService;
    private readonly webhookSubscriptionRepository;
    private readonly eventEmitter;
    private readonly microsoftConfig;
    private readonly logger;
    constructor(microsoftAuthService: MicrosoftAuthService, webhookSubscriptionRepository: OutlookWebhookSubscriptionRepository, eventEmitter: EventEmitter2, microsoftConfig: MicrosoftOutlookConfig);
    sendEmail(message: Partial<Message>, externalUserId: string): Promise<{
        message: Message;
    }>;
    createWebhookSubscription(externalUserId: string): Promise<Subscription>;
    handleEmailWebhook(notificationItem: ChangeNotification): Promise<{
        success: boolean;
        message: string;
    }>;
}