import { NotProvidedCredentialsError } from '../../errors';
import { ISMSSender } from '../../interfaces';
import { SendResult } from '../../types';
import { USERNAME, PASSWORD, FROM } from '../../utils/constants';
import { SmsClient } from '@azure/communication-sms';

export default class AzureSMSSenderClient implements ISMSSender {
    client: SmsClient;
    constructor() {
        if (
            !(USERNAME && PASSWORD && FROM) &&
            !process.env.COMMUNICATION_SERVICES_CONNECTION_STRING
        )
            throw new NotProvidedCredentialsError();
        const connectionString =
            process.env.COMMUNICATION_SERVICES_CONNECTION_STRING ??
            `endpoint=https://${USERNAME}.communication.azure.com/;accesskey=${PASSWORD}`;
        this.client = new SmsClient(connectionString);
    }

    public async send(phones: string[], message: string): Promise<SendResult> {
        const result: SendResult = {
            sent: [],
            failed: [],
        };
        const smsResults = await this.client.send({
            from: FROM as string,
            to: phones,
            message: message,
        });

        smsResults.forEach((smsResult) => {
            if (smsResult.errorMessage)
                result.failed.push({
                    phone: smsResult.to,
                    error: smsResult.errorMessage,
                });
            else result.sent.push({ phone: smsResult.to });
        });

        return result;
    }
}