// HOW TO ADD A NEW EMAIL SERVICE (e.g. Brevo, SendGrid, Resend, Postmark)
//
// 1. Copy this file to  lib/providers/yourservice.js   (remove the .txt)
// 2. Fill in the values below and write the send() function.
// 3. Register it in lib/providers/index.js  (one line).
// 4. Put the API key in .env   e.g.  YOURSERVICE_API_KEY=xxxx
// 5. Restart the app -> Services tab -> "Add service" -> pick it.
//
// send() receives already-rendered content. It must:
//   - return { id: '<provider message id or null>' } on success
//   - throw an Error on failure (set err.status = HTTP status if you have it;
//     429 or 402 will automatically PAUSE the campaign so you don't burn your limit)

module.exports = {
  type: 'yourservice',                 // unique, lowercase
  label: 'Your Service',               // shown in the UI
  needsKey: true,
  defaultEnvKey: 'YOURSERVICE_API_KEY',
  notes: 'Short hint shown in the UI.',

  async send({ apiKey, from, to, subject, html, text, replyTo }) {
    const res = await fetch('https://api.example.com/send', {
      method: 'POST',
      headers: { Authorization: `Bearer ${apiKey}`, 'Content-Type': 'application/json' },
      body: JSON.stringify({ from, to, subject, html, text }),   // <- map to their field names
    });
    const json = await res.json().catch(() => ({}));
    if (!res.ok) {
      const err = new Error(json.message || `HTTP ${res.status}`);
      err.status = res.status;
      throw err;
    }
    return { id: json.id || null };
  },
};