import assert from "node:assert/strict";
import { readFile } from "node:fs/promises";
import { dirname, join } from "node:path";
import { test } from "node:test";
import { fileURLToPath } from "node:url";

const docsSiteDir = join(dirname(fileURLToPath(import.meta.url)), "..");

async function readDocsFile(path) {
  return readFile(join(docsSiteDir, path), "utf8");
}

test("docs introduction shows the ingestion and runtime mechanics early", async () => {
  const introduction = await readDocsFile(
    "content/docs/getting-started/introduction.mdx",
  );

  assert.match(
    introduction,
    /import\s+\{\s*ProductMechanics\s*\}\s+from\s+"@\/components\/product-mechanics";/,
  );
  assert.match(introduction, /<ProductMechanics\s*\/>/);

  const heroIndex = introduction.indexOf("Make analytics context");
  const mechanicsIndex = introduction.indexOf("<ProductMechanics />");
  const useCaseIndex = introduction.indexOf("## What agents can do with KTX");
  const heroSource = introduction.slice(0, mechanicsIndex);

  assert.ok(heroIndex >= 0, "introduction should include the custom hero");
  assert.ok(
    mechanicsIndex > heroIndex,
    "mechanics component should appear after the hero",
  );
  assert.ok(
    mechanicsIndex < useCaseIndex,
    "mechanics component should appear before use-case sections",
  );
  assert.doesNotMatch(heroSource, /Get Started/);
  assert.doesNotMatch(heroSource, /The Context Layer/);
  assert.doesNotMatch(heroSource, /Building Context/);
  assert.doesNotMatch(heroSource, /flex flex-wrap gap-3/);
});

test("product mechanics component covers source-specific context and SQL expansion", async () => {
  const component = await readDocsFile("components/product-mechanics.tsx");

  for (const expectedText of [
    "A semantic compiler for analytics agents",
    "Ingestion",
    "Runtime",
    "wiki/",
    "semantic-layer/",
    "raw-sources/",
    ".ktx/",
    "sl_refs",
    "Company documentation",
    "Notion pages",
    "Metabase",
    "query history",
    "extract evidence",
    "reconcile entities",
    "validate references",
    "semantic query plan",
    "dialect SQL",
    "bounded rows",
    "provenance",
    "measure: orders.total_revenue",
    "dimension: customers.segment",
    "select",
  ]) {
    assert.ok(
      component.includes(expectedText),
      `component should include: ${expectedText}`,
    );
  }

  assert.doesNotMatch(component, /KTX does more than retrieve Markdown/);
  assert.doesNotMatch(component, /Plain Markdown \+ RAG/);
  assert.doesNotMatch(component, /comparisonRows/);
  assert.doesNotMatch(component, /ComparisonTable/);
  assert.doesNotMatch(component, /Not just retrieval/);
  assert.doesNotMatch(component, /KTX works in two moments/);
  assert.doesNotMatch(component, /w-\[calc\(100vw/);
  assert.doesNotMatch(component, /xl:grid-cols-2/);
  assert.doesNotMatch(component, /lg:grid-cols-\[[^\]]*_2rem_/);
});