#!/usr/bin/env node
"use strict";

const assert = require("node:assert/strict");
const fs = require("node:fs");
const path = require("node:path");
const vm = require("node:vm");

const RUNTIME_PATH = path.join(
  process.cwd(),
  "rust/crates/mnote-web/browser/document-tiptap-conversion-runtime.js",
);

function loadConversionRuntime() {
  const source = fs
    .readFileSync(RUNTIME_PATH, "utf8")
    .replace(/\bexport const\s+([A-Za-z0-9_]+)\s*=/g, "const $1 =");
  const sandbox = { console };
  vm.runInNewContext(
    `${source}\n;globalThis.__mnoteExports = { pageBodyTiptapDocumentSource, pageBodyTiptapDocument };`,
    sandbox,
    { filename: RUNTIME_PATH },
  );
  return sandbox.__mnoteExports;
}

function paragraphText(doc) {
  return doc?.content?.[0]?.content?.[0]?.text || "";
}

const {
  pageBodyTiptapDocumentSource,
  pageBodyTiptapDocument,
} = loadConversionRuntime();

const blockDocument = {
  type: "doc",
  content: [{
    type: "paragraph",
    attrs: { blockId: "block-truth" },
    content: [{ type: "text", text: "Block truth" }],
  }],
};

const legacyContent = [{
  id: "legacy-1",
  type: "paragraph",
  content: [{ type: "text", text: "Legacy fallback" }],
}];

const localWithBlockAndLegacy = {
  projectionSource: "local_markdown.content",
  blockDocument,
  content: legacyContent,
};
assert.equal(
  pageBodyTiptapDocumentSource(localWithBlockAndLegacy),
  "page_aggregate.block_document",
);
assert.equal(
  paragraphText(pageBodyTiptapDocument(localWithBlockAndLegacy)),
  "Block truth",
);

const localLegacyOnly = {
  projectionSource: "local_markdown.content",
  content: legacyContent,
};
assert.equal(
  pageBodyTiptapDocumentSource(localLegacyOnly),
  "local_markdown.content",
);
assert.equal(
  paragraphText(pageBodyTiptapDocument(localLegacyOnly)),
  "Legacy fallback",
);

const compatLegacyOnly = {
  content: legacyContent,
};
assert.equal(
  pageBodyTiptapDocumentSource(compatLegacyOnly),
  "compat.legacy_content",
);
assert.equal(
  paragraphText(pageBodyTiptapDocument(compatLegacyOnly)),
  "Legacy fallback",
);

assert.equal(
  pageBodyTiptapDocumentSource({}, "Fallback text"),
  "degraded.fallback_text",
);
assert.equal(
  paragraphText(pageBodyTiptapDocument({}, "Fallback text")),
  "Fallback text",
);

console.log("task522 page aggregate compat fallback contract passed");