Vercel Functions

import { NextResponse } from 'next/server';
import { Lettr } from 'lettr';

const lettr = new Lettr(process.env.LETTR_API_KEY!);

export async function POST(request: Request) {
  try {
    const body = await request.json();
    const { to, subject, html, text } = body;

    // Validate required fields
    if (!to || !subject || (!html && !text)) {
      return NextResponse.json(
        { error: 'Missing required fields: to, subject, and html or text' },
        { status: 400 }
      );
    }

    // Send email via Lettr
    const result = await lettr.emails.send({
      from: process.env.FROM_EMAIL || 'noreply@yourdomain.com',
      to: Array.isArray(to) ? to : [to],
      subject,
      html,
      text,
    });

    console.log(`Email sent successfully. Request ID: ${result.request_id}`);

    return NextResponse.json({
      success: true,
      requestId: result.request_id,
      accepted: result.accepted,
    });
  } catch (error: any) {
    console.error('Failed to send email:', error);

    return NextResponse.json(
      { error: error.message || 'Failed to send email' },
      { status: error.status || 500 }
    );
  }
}

// Configure function execution
export const maxDuration = 30; // Max duration in seconds (Pro plan and higher)

import type { NextApiRequest, NextApiResponse } from 'next';
import { Lettr } from 'lettr';

const lettr = new Lettr(process.env.LETTR_API_KEY!);

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  // Only allow POST requests
  if (req.method !== 'POST') {
    return res.status(405).json({ error: 'Method not allowed' });
  }

  try {
    const { to, subject, html, text } = req.body;

    // Validate required fields
    if (!to || !subject || (!html && !text)) {
      return res.status(400).json({
        error: 'Missing required fields: to, subject, and html or text',
      });
    }

    // Send email
    const result = await lettr.emails.send({
      from: process.env.FROM_EMAIL || 'noreply@yourdomain.com',
      to: Array.isArray(to) ? to : [to],
      subject,
      html,
      text,
    });

    console.log(`Email sent. Request ID: ${result.request_id}`);

    res.status(200).json({
      success: true,
      requestId: result.request_id,
      accepted: result.accepted,
    });
  } catch (error: any) {
    console.error('Email send failed:', error);

    res.status(error.status || 500).json({
      error: error.message || 'Internal server error',
    });
  }
}

// Configure function execution
export const config = {
  maxDuration: 30,
};