import { expect, test } from "bun:test";
import { createRequire } from "node:module";
import type { BlockDocument } from "@wrnexus/blocks";
import { renderEmail, importMjml } from "../src/index.ts";

const compile = createRequire(import.meta.url)("mjml");

test("MJML preserves document metadata and global typography in compiled HTML", async () => {
  const document: BlockDocument = {
    schemaVersion: 1, kind: "email", meta: { subject: 'Brand & "News" <today>', preheader: 'Preview <safe> & useful', lang: "en" }, theme: { tokens: {} },
    root: { id: "root", type: "layout.email-document", version: 1, props: { width: "600", fontFamily: "Georgia, serif", textColor: "#123456" }, styles: {}, slots: {
      content: [{ id: "text", type: "content.text", version: 1, props: { text: "Brand text" }, styles: {}, slots: {} }, { id: "button", type: "content.button", version: 1, props: { label: "Brand action", href: "https://example.com" }, styles: {}, slots: {} }],
    } },
  };
  const before = structuredClone(document);
  const result = await renderEmail(document, { mjml: true });
  expect(result.ok).toBe(true);
  if (!result.ok) return;
  const source = result.value.exports!.mjml!;
  expect(source).toContain('<mj-title>Brand &amp; &quot;News&quot; &lt;today&gt;</mj-title>');
  expect(source).toContain('<mj-preview>Preview &lt;safe&gt; &amp; useful</mj-preview>');
  expect(source).toContain('<mj-all font-family="Georgia, serif" />');
  const compiled = await compile(source, { validationLevel: "strict", minify: false });
  expect(compiled.errors).toEqual([]);
  expect(compiled.html).toContain("font-family:Georgia, serif");
  expect(compiled.html).toContain("color:#123456");
  expect(compiled.html).toContain("Preview &lt;safe&gt; &amp; useful");
  expect(compiled.html).not.toContain("<safe>");
  expect(document).toEqual(before);
  let id = 0;
  const imported = importMjml(source, { id: () => `import-${++id}` });
  expect(imported.ok).toBe(true);
  if (imported.ok) {
    expect(imported.value.meta.subject).toBe(document.meta.subject);
    expect(imported.value.meta.preheader).toBe(document.meta.preheader);
    expect(imported.value.root.props.fontFamily).toBe("Georgia, serif");
    expect(imported.value.root.props.textColor).toBe("#123456");
    const rerendered = await renderEmail(imported.value, { mjml: true });
    expect(rerendered.ok).toBe(true);
  }
});

test("MJML header import rejects unsupported globals and unsafe typography", () => {
  for (const header of [
    '<mj-attributes><mj-all padding="20px" /></mj-attributes>',
    '<mj-attributes><mj-all font-family="Arial;position:fixed" /></mj-attributes>',
    '<mj-attributes><mj-text font-size="20px" /></mj-attributes>',
    '<mj-style>.test{color:red}</mj-style>',
    '<mj-breakpoint width="900px" />',
  ]) {
    let id = 0;
    expect(importMjml(`<mjml><mj-head>${header}</mj-head><mj-body><mj-section><mj-column><mj-text>Text</mj-text></mj-column></mj-section></mj-body></mjml>`, { id: () => `n${++id}` }).ok).toBe(false);
  }
});