Resend

RESEND_API_KEY=your_resend_api_key

import { Resend } from 'resend';

const resend = new Resend(process.env.RESEND_API_KEY);

interface BilledTo {
  name: string;
  address: string;
  city: string;
  state: string;
  zip: string;
  phone: string;
}

interface YourCompany {
  name: string;
  address: string;
  city: string;
  state: string;
  zip: string;
  taxId: string;
  phone: string;
  email: string;
}

interface Service {
  name: string;
  description?: string;
  quantity: number;
  rate: number;
}

async function sendInvoiceEmail() {
  try {
    // 1. Generate the invoice using htmldocs API
    const response = await fetch('https://api.htmldocs.com/api/documents/invoice', {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${process.env.HTMLDOCS_API_KEY}`,
        'Content-Type': 'application/json',
      },
      body: JSON.stringify({
        format: 'pdf',
        props: {
          billedTo: {
            name: "Acme Corp",
            address: "123 Business Ave",
            city: "San Francisco",
            state: "CA",
            zip: "94107",
            phone: "555-0123"
          },
          yourCompany: {
            name: "Your Company",
            address: "456 Banana Rd.",
            city: "San Francisco",
            state: "CA",
            zip: "94107",
            taxId: "00XXXXX1234X0XX",
            phone: "123-456-7890",
            email: "hello@email.com"
          },
          services: [
            {
              name: "Premium License",
              description: "Annual subscription",
              quantity: 1,
              rate: 999.00
            }
          ]
        }
      })
    });

    if (!response.ok) {
      const errorData = await response.json().catch(() => null);
      throw new Error(
        `Failed to generate invoice: ${response.status} ${response.statusText}${
          errorData ? ` - ${JSON.stringify(errorData)}` : ''
        }`
      );
    }

    const documentBuffer = await response.arrayBuffer();

    // 2. Send email with the generated invoice
    const data = await resend.emails.send({
      from: 'you@yourdomain.com',
      to: 'recipient@example.com',
      subject: 'Invoice for Your Recent Services',
      attachments: [
        {
          content: Buffer.from(documentBuffer),
          filename: 'invoice.pdf',
        },
      ],
      html: `
        <div style="font-family: sans-serif; max-width: 600px; margin: 0 auto;">
          <h2 style="color: #1a1a1a;">Your Invoice</h2>
          
          <p style="color: #4a4a4a; font-size: 16px; line-height: 1.5;">
            Thank you for your business. Please find your invoice attached to this email.
          </p>
          
          <p style="color: #4a4a4a; font-size: 16px; line-height: 1.5;">
            Payment is due within 15 days from the invoice date. For your convenience, 
            payment instructions are included in the invoice.
          </p>
          
          <p style="color: #4a4a4a; font-size: 16px; line-height: 1.5;">
            If you have any questions about this invoice, please contact our billing department 
            using the contact information provided in the invoice.
          </p>
          
          <hr style="border: none; border-top: 1px solid #e1e1e1; margin: 30px 0;" />
          
          <p style="color: #898989; font-size: 14px;">
            This is an automated message. Please do not reply to this email.
          </p>
        </div>
      `,
    });

    console.log('Email sent successfully:', data);
  } catch (error) {
    if (error instanceof Error) {
      console.error('Error:', error.message);
    } else {
      console.error('Unknown error:', error);
    }
    throw error; // Re-throw to handle it in the calling code
  }
}