import { expect, test, type Page } from "@playwright/test";

const APP_ORIGIN = "http://127.0.0.1:4173";
const FOUR_COLOUR_PNG =
  "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAE0lEQVR4nGP4z8DwHwwZGP6DAQBJyAn3FGMynQAAAABJRU5ErkJggg==";

async function keepNetworkLocal(page: Page): Promise<string[]> {
  const externalRequests: string[] = [];
  await page.route("**/*", async (route) => {
    const requestUrl = new URL(route.request().url());
    if (requestUrl.origin !== APP_ORIGIN) {
      externalRequests.push(requestUrl.href);
      await route.abort();
      return;
    }
    await route.continue();
  });
  return externalRequests;
}

function recordRuntimeErrors(page: Page): string[] {
  const runtimeErrors: string[] = [];
  page.on("pageerror", (error) => runtimeErrors.push(error.message));
  page.on("console", (message) => {
    if (message.type() === "error") runtimeErrors.push(message.text());
  });
  return runtimeErrors;
}

test("converts, composites and interpolates without transient empty results", async ({
  page,
}) => {
  const runtimeErrors = recordRuntimeErrors(page);
  const externalRequests = await keepNetworkLocal(page);
  await page.goto("/deep/nested/colour/");

  await expect(
    page.getByRole("heading", { name: "Colour workbench" }),
  ).toBeVisible();
  await expect(
    page.getByRole("heading", { name: "Convert colours" }),
  ).toBeVisible();

  await page.getByLabel("Colour", { exact: true }).fill("rgb(255 0 0 / 50%)");
  const alphaHex = page
    .locator(".conversion-row")
    .filter({ hasText: "HEX + alpha" });
  await expect(alphaHex).toContainText("#ff000080");

  await page.getByLabel("Colour", { exact: true }).fill("rgb(255 0");
  await expect(
    page.getByText(
      "Keeping the last valid conversion while you finish editing.",
    ),
  ).toBeVisible();
  await expect(alphaHex).toContainText("#ff000080");

  await page.getByRole("tab", { name: /Composite/u }).click();
  await expect(
    page.getByRole("heading", { name: "Composite translucent colours" }),
  ).toBeVisible();
  await expect(page.locator(".layer-row")).toHaveCount(3);
  await page.getByRole("button", { name: "+ Add layer" }).click();
  await expect(page.locator(".layer-row")).toHaveCount(4);
  await expect(page.locator(".result-values code").first()).not.toBeEmpty();

  await page.getByRole("tab", { name: /Steps/u }).click();
  await expect(
    page.getByRole("heading", { name: "Step between colours" }),
  ).toBeVisible();
  await expect(page.locator(".step-swatch")).toHaveCount(9);
  await page.getByLabel(/Swatches/u).fill("5");
  await expect(page.locator(".step-swatch")).toHaveCount(5);
  await page.getByLabel("Gradient type").selectOption("radial");
  await expect(page.locator(".gradient-preview + pre")).toContainText(
    "radial-gradient(ellipse at center",
  );
  await page.getByText("Repeating", { exact: true }).click();
  await expect(page.locator(".gradient-preview + pre")).toContainText(
    "repeating-radial-gradient",
  );

  expect(externalRequests).toEqual([]);
  expect(runtimeErrors).toEqual([]);
});

test("keeps picking, accessibility analysis and palette data browser-local", async ({
  page,
}) => {
  const runtimeErrors = recordRuntimeErrors(page);
  const externalRequests = await keepNetworkLocal(page);
  await page.goto("/deep/nested/colour/#pick");

  await expect(
    page.getByRole("heading", { name: "Pick a colour" }),
  ).toBeVisible();
  const picker = page.getByRole("application");
  await expect(picker).toHaveAccessibleName(/Saturation 62 percent/u);
  await picker.focus();
  await picker.press("ArrowRight");
  await expect(picker).toHaveAccessibleName(/Saturation 63 percent/u);
  await page.getByLabel("Exact CSS colour").fill("oklch(70% 0.2 30)");
  await page.getByRole("button", { name: "Add to palette" }).click();

  await page.getByRole("tab", { name: /Contrast/u }).click();
  await expect(
    page.getByRole("heading", { name: "Contrast & compare" }),
  ).toBeVisible();
  await page
    .getByRole("textbox", { name: "Foreground", exact: true })
    .fill("#000000");
  await page
    .getByRole("textbox", { name: "Background", exact: true })
    .fill("#ffffff");
  await expect(page.locator(".ratio-heading strong")).toHaveText("21.00");
  await expect(
    page.getByText("AAA normal text", { exact: true }),
  ).toBeVisible();

  await page.getByRole("tab", { name: /Palette/u }).click();
  await expect(
    page.getByRole("heading", { name: "Build a palette" }),
  ).toBeVisible();
  await page
    .getByLabel("Palette data")
    .fill("primary: #123456\naccent: oklch(76% 0.17 87)");
  await page.getByRole("button", { name: "Import colours" }).click();
  await expect(page.getByRole("status")).toContainText("Added 2 colours");
  await expect(page.locator(".saved-colour-list > li")).toHaveCount(3);
  await expect(page.locator(".export-preview")).toContainText(
    "--brand-primary",
  );

  await page.getByLabel("Palette data").fill(
    JSON.stringify({
      vivid: {
        $type: "color",
        $value: {
          colorSpace: "display-p3",
          components: [0.9, 0.2, 0.1],
        },
      },
      vividAlias: { $value: "{vivid}" },
    }),
  );
  await page.getByRole("button", { name: "Import colours" }).click();
  await expect(page.getByRole("status")).toContainText(
    "Added 1 colour; ignored 1 exact duplicate",
  );
  await expect(page.locator(".saved-colour-list > li")).toHaveCount(4);
  await expect(page.locator(".contrast-matrix tbody tr")).toHaveCount(4);
  await expect(
    page.locator(".contrast-matrix tbody tr").first().locator("td"),
  ).toHaveCount(4);
  await page.getByLabel("Format").selectOption("tokens");
  await expect(page.locator(".export-preview")).toContainText(
    "https://www.designtokens.org/schemas/2025.10/format.json",
  );

  await page.reload();
  await page.getByRole("tab", { name: /Palette/u }).click();
  await expect(page.locator(".saved-colour-list > li")).toHaveCount(4);

  expect(externalRequests).toEqual([]);
  expect(runtimeErrors).toEqual([]);
});

test("loads, samples and extracts a palette from an in-memory image", async ({
  page,
}) => {
  const runtimeErrors = recordRuntimeErrors(page);
  const externalRequests = await keepNetworkLocal(page);
  await page.goto("/deep/nested/colour/#image");

  await expect(
    page.getByRole("heading", { name: "Pick and extract colours" }),
  ).toBeVisible();
  await page.locator('input[type="file"]').evaluate((element, encoded) => {
    const bytes = Uint8Array.from(atob(encoded), (character) =>
      character.charCodeAt(0),
    );
    const transfer = new DataTransfer();
    transfer.items.add(
      new File([bytes], "four-colours.png", { type: "image/png" }),
    );
    const input = element as HTMLInputElement;
    input.files = transfer.files;
    input.dispatchEvent(new Event("change", { bubbles: true }));
  }, FOUR_COLOUR_PNG);
  await expect(page.locator(".image-picker-lab__status")).toContainText(
    "four-colours.png loaded: 2 by 2 pixels",
  );
  await page.getByRole("button", { name: "Sample coordinate" }).click();
  await expect(page.getByLabel("Sampled colour #FF0000")).toBeVisible();

  await page.getByRole("button", { name: "Extract palette" }).click();
  await expect(
    page.getByRole("list", { name: "Extracted image palette" }),
  ).toBeVisible({ timeout: 30_000 });
  expect(
    await page
      .getByRole("list", { name: "Extracted image palette" })
      .getByRole("listitem")
      .count(),
  ).toBeGreaterThanOrEqual(2);

  await page.getByRole("button", { name: "Remove image" }).click();
  await expect(page.locator(".image-picker-lab__status")).toContainText(
    "Image removed",
  );

  expect(externalRequests).toEqual([]);
  expect(runtimeErrors).toEqual([]);
});

test("serves a relocatable production artifact with hardened headers", async ({
  request,
}) => {
  const index = await request.get("/deep/nested/colour/");
  expect(index.ok()).toBe(true);
  expect(index.headers()["content-security-policy"]).toContain(
    "default-src 'self'",
  );
  expect(index.headers()["x-content-type-options"]).toBe("nosniff");
  expect(await index.text()).not.toMatch(/\b(?:src|href)=["']\//u);

  const manifest = await request.get("/deep/nested/colour/toolbox-app.json");
  expect(manifest.headers()["content-type"]).toContain("application/json");
  await expect(manifest.json()).resolves.toMatchObject({
    id: "de.add-ideas.colour-tools",
    version: "0.2.0",
    entry: "./",
    icon: "./favicon.svg",
  });
});