import { Resend } from 'resend';

const resend = new Resend('re_xxxxxxxxx');

const { data, error } = await resend.inboxes.threads.emails.reply({
  inboxId: 'b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1',
  threadId: '4d8e2a1c-9b3f-4c6d-8a21-3e5f7c9c0d12',
  emailId: '5b1a9f47-2c8d-4e6f-9a03-1d2e3f4a5b60',
  cc: ['billing@example.com'],
  bcc: ['records@example.com'],
  html: '<p>Refund issued for order 1041.</p>',
  text: 'Refund issued for order 1041.',
  attachments: [
    {
      path: 'https://resend.com/static/sample/invoice.pdf',
      filename: 'invoice.pdf',
    },
  ],
});

curl -X POST 'https://api.resend.com/inboxes/b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1/threads/4d8e2a1c-9b3f-4c6d-8a21-3e5f7c9c0d12/emails/5b1a9f47-2c8d-4e6f-9a03-1d2e3f4a5b60/reply' \
     -H 'Authorization: Bearer re_xxxxxxxxx' \
     -H 'Content-Type: application/json' \
     -d $'{
  "cc": ["billing@example.com"],
  "bcc": ["records@example.com"],
  "html": "<p>Refund issued for order 1041.</p>",
  "text": "Refund issued for order 1041.",
  "attachments": [
    {
      "path": "https://resend.com/static/sample/invoice.pdf",
      "filename": "invoice.pdf"
    }
  ]
}'

resend inboxes threads emails reply b3e2b2b6-3f0e-4c8e-9ad3-2f43a1e2c7f1 4d8e2a1c-9b3f-4c6d-8a21-3e5f7c9c0d12 5b1a9f47-2c8d-4e6f-9a03-1d2e3f4a5b60 \
  --cc billing@example.com \
  --bcc records@example.com \
  --html "<p>Refund issued for order 1041.</p>" \
  --text "Refund issued for order 1041." \
  --attachment ./invoice.pdf

{
  "id": "6a0c8e58-3d9e-4f7a-8b14-2e3f4a5b6c71"
}