import { test } from "node:test";
import assert from "node:assert/strict";
import { CONTACT_RECIPIENT, contactMail, mailSendUrl } from "../../server/utils/contactMail.ts";

// components/ContactForm.vue posts these fields; it sends "Kontaktanfrage über Website" when the subject is left empty.
const form = {
	name: "Erika Mustermann",
	email: "erika@example.org",
	subject: "Notizbuch mit Firmenlogo",
	message: "Hallo,\nkönnt ihr 50 Stück liefern?"
};

const required = { ok: false, message: "Name, E-Mail und Nachricht sind erforderlich" };

test("sends to the mail service's /v1/send/message", () => {
	assert.equal(mailSendUrl("http://mail:2222"), "http://mail:2222/v1/send/message");
	assert.equal(mailSendUrl("http://mail:2222/"), "http://mail:2222/v1/send/message");
});

test("builds the body the mail service reads: to_email, subject and message", () => {
	assert.deepEqual(contactMail(form), {
		ok: true,
		mail: {
			to_email: "paperwork@muellerprints.de",
			subject: "Kontaktanfrage: Notizbuch mit Firmenlogo",
			message: [
				"Name: Erika Mustermann",
				"E-Mail: erika@example.org",
				"Betreff: Notizbuch mit Firmenlogo",
				"",
				"Nachricht:",
				"Hallo,\nkönnt ihr 50 Stück liefern?",
				"",
				"---",
				"Diese Nachricht wurde über das Kontaktformular auf muellerprints.de gesendet."
			].join("\n")
		}
	});
	assert.equal(CONTACT_RECIPIENT, "paperwork@muellerprints.de");
});

test("fills in the subject when the form sends none", () => {
	for (const subject of [undefined, "", "  "]) {
		const result = contactMail({ ...form, subject });

		assert.equal(result.ok && result.mail.subject, "Kontaktanfrage: Anfrage über Website");
		assert.equal(result.ok && result.mail.message.split("\n")[2], "Betreff: Kontaktanfrage über Website");
	}
});

test("keeps a line break in the subject from starting another mail header", () => {
	const result = contactMail({ ...form, subject: "Frage\r\nBcc: someone@example.org\nX-Spam: yes" });

	assert.equal(result.ok && result.mail.subject, "Kontaktanfrage: Frage Bcc: someone@example.org X-Spam: yes");
});

test("requires a name, an e-mail address and a message", () => {
	for (const field of ["name", "email", "message"]) {
		assert.deepEqual(contactMail({ ...form, [field]: undefined }), required, field);
		assert.deepEqual(contactMail({ ...form, [field]: " " }), required, field);
		assert.deepEqual(contactMail({ ...form, [field]: ["a"] }), required, field);
	}
	for (const body of [undefined, null, "name=Erika", [form]]) assert.deepEqual(contactMail(body), required);
});

test("rejects an invalid e-mail address", () => {
	for (const email of ["erika", "erika@example", "erika @example.org", "@example.org"]) {
		assert.deepEqual(contactMail({ ...form, email }), { ok: false, message: "Ungültige E-Mail-Adresse" }, email);
	}
});