import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import path from "node:path";
import { fileURLToPath } from "node:url";

import ts from "typescript";

const testDir = path.dirname(fileURLToPath(import.meta.url));
const sourcePath = path.resolve(testDir, "../src/features/article-draft/model.ts");
const source = readFileSync(sourcePath, "utf8");
const compiled = ts.transpileModule(source, {
  compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2022 },
});

const moduleExports = {};
new Function("exports", compiled.outputText)(moduleExports);

const { compareDraftVersions, parseDraftPreview, selectDraftById } = moduleExports;

const baseDraft = {
  id: "11111111-1111-1111-1111-111111111111",
  article_id: "aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa",
  version: 1,
  title: "Draft One",
  slug: "draft-one",
  meta_title: "Meta One",
  meta_description: "Description One",
  body_object_key: "articles/a/drafts/v1.md",
  body_markdown: [
    "# Draft One",
    "",
    "## Intro",
    "See [guide](https://example.com/guide).",
    "",
    "| A | B |",
    "| --- | --- |",
    "| 1 | 2 |",
    "",
    "![Mock](placeholder://mock/1)",
  ].join("\n"),
  faq_items: [{ question: "What is this?", answer: "Preview draft." }],
  visual_placeholders: ["![Mock](placeholder://mock/1)"],
  evidence_references: ["evidence-id-1"],
  unsupported_claim_warnings: [],
  based_on_draft_id: null,
  status: "DRAFT_ASSEMBLED",
  created_at: "2026-05-21T00:00:00Z",
  updated_at: "2026-05-21T00:00:00Z",
};

const secondDraft = {
  ...baseDraft,
  id: "22222222-2222-2222-2222-222222222222",
  version: 2,
  title: "Draft Two",
  meta_title: "Meta Two",
  body_markdown: `${baseDraft.body_markdown}\n\nRevision note.`,
  based_on_draft_id: baseDraft.id,
};

const previewBlocks = parseDraftPreview(baseDraft.body_markdown, baseDraft.faq_items);
assert.ok(previewBlocks.some((block) => block.type === "heading" && block.text === "Draft One"));
assert.ok(previewBlocks.some((block) => block.type === "table"));
assert.ok(previewBlocks.some((block) => block.type === "image" && block.src === "placeholder://mock/1"));
assert.ok(previewBlocks.some((block) => block.type === "paragraph" && block.links.length === 1));
assert.ok(previewBlocks.some((block) => block.type === "faq" && block.items.length === 1));

const selected = selectDraftById([secondDraft, baseDraft], baseDraft.id);
assert.equal(selected.id, baseDraft.id);

const comparison = compareDraftVersions(secondDraft, baseDraft);
assert.equal(comparison.titleChanged, true);
assert.equal(comparison.metaTitleChanged, true);
assert.equal(comparison.bodyChanged, true);
assert.ok(comparison.changedLineCount >= 1);