import { sendEmail } from "@beenvoice/email";

process.env.EMAIL_PROVIDER = "mailpit";
process.env.EMAIL_FROM ??= "beenvoice <noreply@beenvoice.test>";
process.env.SMTP_HOST ??= "127.0.0.1";
process.env.SMTP_PORT ??= "1028";
process.env.SMTP_SECURE ??= "false";

const recipient =
  process.env.EMAIL_PREVIEW_TO ?? "invoice-preview@beenvoice.test";
const mailpitApiUrl =
  process.env.MAILPIT_API_URL?.replace(/\/$/, "") ?? "http://127.0.0.1:8028";
const referenceId = `beenvoice-preview-${crypto.randomUUID()}`;
const previewPdf = Buffer.from(
  "%PDF-1.4\n1 0 obj<</Type/Catalog/Pages 2 0 R>>endobj\n2 0 obj<</Type/Pages/Count 0>>endobj\ntrailer<</Root 1 0 R>>\n%%EOF\n",
);

const result = await sendEmail({
  to: recipient,
  subject: "Beenvoice invoice delivery preview",
  html: "<h1>Invoice delivery is working</h1><p>This message verifies the Mailpit transport and PDF attachment path.</p>",
  text: "Invoice delivery is working. This message verifies the Mailpit transport and PDF attachment path.",
  idempotencyKey: referenceId,
  attachments: [
    {
      filename: "invoice-preview.pdf",
      content: previewPdf,
    },
  ],
});

type MailpitMessageSummary = {
  ID: string;
  MessageID: string;
  Attachments: number;
};

let captured: MailpitMessageSummary | undefined;
const expectedMessageId = result.id.replace(/^<|>$/g, "");
for (let attempt = 0; attempt < 10 && !captured; attempt += 1) {
  const response = await fetch(`${mailpitApiUrl}/api/v1/messages`);
  if (!response.ok) {
    throw new Error(`Mailpit API returned ${response.status}`);
  }
  const body = (await response.json()) as {
    messages?: MailpitMessageSummary[];
  };
  captured = body.messages?.find(
    (message) => message.MessageID === expectedMessageId,
  );
  if (!captured) await Bun.sleep(100);
}

if (!captured) throw new Error("Mailpit did not capture the preview message");
if (captured.Attachments !== 1) {
  throw new Error("Mailpit did not capture the invoice PDF attachment");
}

console.info(
  JSON.stringify({
    provider: result.provider,
    recipient,
    messageId: result.id,
    referenceId,
    mailpitMessageId: captured.ID,
    attachmentCount: captured.Attachments,
  }),
);