import { Injectable } from '@nestjs/common';
import { Client } from '@microsoft/microsoft-graph-client';
import {
  IntegrationStrategy,
  IntegrationResult,
} from '../integration.strategy';

@Injectable()
export class OutlookStrategy implements IntegrationStrategy {
  async sendMessage(
    to: string,
    message: string,
    config: any,
  ): Promise<IntegrationResult> {
    try {
      const { accessToken } = config;

      const graphClient = Client.init({
        authProvider: {
          getAccessToken: async () => accessToken,
        } as any,
      });

      const subject = config.subject || 'Notification';
      const mail = {
        message: {
          subject,
          body: {
            contentType: config.html ? 'HTML' : 'Text',
            content: config.html || message,
          },
          toRecipients: [
            {
              emailAddress: {
                address: to,
              },
            },
          ],
        },
      };

      await graphClient.api('/me/sendMail').post(mail);

      return {
        success: true,
        provider: 'outlook',
        service: 'API',
        timestamp: new Date(),
      };
    } catch (error) {
      return {
        success: false,
        provider: 'outlook',
        service: 'API',
        error: error.message,
        timestamp: new Date(),
      };
    }
  }

  validateConfig(config: any): boolean {
    return !!config.accessToken;
  }
}