const assert = require("node:assert/strict");
const { Buffer } = require("node:buffer");
const { encode } = require("@msgpack/msgpack");
const { chromium } = require(process.env.PLAYWRIGHT_PATH || "playwright");

const base = process.env.SITE_URL || "http://127.0.0.1:18790";
const endpoint = "https://health.quorate.dev/health";
const paths = ["/", "/about/", "/blog/", "/404.html", "/blog/specimen/"];

const days = Array(30).fill(1);
days[1] = null;
days[2] = 23 / 24;
days[3] = 0;

const snapshot = [
  1786838400,
  [
    ["Nodes", [{ node: "one" }, { node: "two" }], [days, days]],
    ["Public services", [{ service: "code" }], [days]],
  ],
];

function mockHealth(route, mode) {
  if (mode === "connectionrefused") {
    return route.abort("connectionrefused");
  }

  return route.fulfill({
    status: mode === "503" ? 503 : 200,
    contentType: "application/msgpack",
    body: Buffer.from(encode(snapshot)),
  });
}

async function checkWidth(page) {
  assert.equal(
    await page.evaluate(
      () => document.documentElement.scrollWidth <= innerWidth,
    ),
    true,
  );
}

async function checkHealth(page, width, mode) {
  await page.route(endpoint, (route) => mockHealth(route, mode));
  await page.goto(`${base}/up/`);
  await page.waitForFunction(
    () => document.documentElement.dataset.ready === "true",
  );

  const healthy = mode === "healthy";
  assert.equal(await page.locator(".bar").count(), healthy ? 90 : 0);
  assert.equal(
    await page.locator(".controls").isVisible(),
    healthy && width <= 600,
  );

  if (healthy) {
    assert.match(
      await page.locator(".health-group h2").first().textContent(),
      /Public services/,
    );

    await page.locator(".bar").nth(2).click();
    assert.match(await page.locator("#detail").textContent(), /95\.83%/);
  } else {
    assert.equal(await page.locator("#observed").textContent(), "No data");
  }

  await checkWidth(page);
  await page.unroute(endpoint);
}

async function checkLayout(page) {
  assert.equal(await page.locator("header nav a").count(), 4);
  assert.equal(await page.locator("h1").count(), 1);
  assert.equal(
    await page
      .locator("body")
      .evaluate((node) => getComputedStyle(node).fontSize),
    "16px",
  );
  assert.equal(
    await page
      .locator("h1")
      .evaluate((node) => getComputedStyle(node).fontSize),
    "24px",
  );
  assert.equal(
    await page
      .locator(".shell")
      .evaluate((node) => getComputedStyle(node).maxWidth),
    "704px",
  );

  await checkWidth(page);
}

async function checkBlog(page) {
  assert.equal(await page.locator(".posts li").count(), 2);
  assert.equal(await page.locator(".posts h2").count(), 2);
  assert.equal(await page.locator(".posts p").count(), 2);
  assert.equal(await page.locator(".posts img").count(), 1);
}

async function checkPost(page) {
  await page.locator(".mermaid svg").waitFor();
  await page.locator("mjx-container").waitFor();

  assert.equal(await page.locator("blockquote").count(), 1);
  assert.equal(await page.locator("table").count(), 1);
}

async function checkPage(page, path) {
  await page.goto(`${base}${path}`);
  await checkLayout(page);

  switch (path) {
    case "/about/":
      assert.equal(await page.locator("article p").textContent(), "WIP");
      break;
    case "/blog/":
      await checkBlog(page);
      break;
    case "/blog/specimen/":
      await checkPost(page);
      break;
  }
}

async function main() {
  const browser = await chromium.launch({
    executablePath: process.env.CHROME_PATH,
    headless: true,
  });
  let cases = 0;

  try {
    for (const width of [320, 390, 768, 1280]) {
      for (const colorScheme of ["light", "dark"]) {
        const page = await browser.newPage({
          viewport: { width, height: 844 },
          colorScheme,
        });
        const errors = [];
        page.on("pageerror", (error) => errors.push(error.message));

        for (const mode of ["healthy", "503", "connectionrefused"]) {
          await checkHealth(page, width, mode);
          cases++;
        }

        for (const path of paths) {
          await checkPage(page, path);
          cases++;
        }

        assert.deepEqual(errors, []);
        await page.close();
      }
    }

    console.log(`PASS: ${cases} page and health cases`);
  } finally {
    await browser.close();
  }
}

main().catch((error) => {
  console.error(error);
  process.exitCode = 1;
});