import nodemailer from "nodemailer";

export interface SmtpConfig {
  host: string;
  port: number;
  user: string;
  password: string;
}

export interface DraftOptions {
  from: string;
  to: string;
  cc?: string;
  subject: string;
  body: string;
  inReplyTo?: string;
  references?: string;
}

function createTransport(cfg: SmtpConfig) {
  return nodemailer.createTransport({
    host: cfg.host,
    port: cfg.port,
    secure: cfg.port === 465,
    auth: { user: cfg.user, pass: cfg.password },
    connectionTimeout: 20_000,
    greetingTimeout: 20_000,
    socketTimeout: 60_000,
  });
}

export async function verifySmtpConnection(cfg: SmtpConfig): Promise<void> {
  const transport = createTransport(cfg);
  try {
    await transport.verify();
  } finally {
    transport.close();
  }
}

export async function sendEmail(cfg: SmtpConfig, draft: DraftOptions): Promise<string> {
  const transport = createTransport(cfg);
  try {
    const info = await transport.sendMail({
      from: draft.from,
      to: draft.to,
      cc: draft.cc,
      subject: draft.subject,
      text: draft.body,
      inReplyTo: draft.inReplyTo,
      references: draft.references,
    });
    return info.messageId;
  } finally {
    transport.close();
  }
}

import nodemailer from "nodemailer";

export interface SmtpConfig {
  host: string;
  port: number;
  user: string;
  password: string;
}

export interface DraftOptions {
  from: string;
  to: string;
  cc?: string;
  subject: string;
  body: string;
  inReplyTo?: string;
  references?: string;
}

function createTransport(cfg: SmtpConfig) {
  return nodemailer.createTransport({
    host: cfg.host,
    port: cfg.port,
    secure: cfg.port === 465,
    auth: { user: cfg.user, pass: cfg.password },
    connectionTimeout: 20_000,
    greetingTimeout: 20_000,
    socketTimeout: 60_000,
  });
}

export async function verifySmtpConnection(cfg: SmtpConfig): Promise<void> {
  const transport = createTransport(cfg);
  try {
    await transport.verify();
  } finally {
    transport.close();
  }
}

export async function sendEmail(cfg: SmtpConfig, draft: DraftOptions): Promise<string> {
  const transport = createTransport(cfg);
  try {
    const info = await transport.sendMail({
      from: draft.from,
      to: draft.to,
      cc: draft.cc,
      subject: draft.subject,
      text: draft.body,
      inReplyTo: draft.inReplyTo,
      references: draft.references,
    });
    return info.messageId;
  } finally {
    transport.close();
  }
}