// The editor by finger alone (F4.9, plan §7.2), in Chromium on the desktop
// and in WebKit on an iPad upright and on its side (playwright.config.ts):
// the acceptance of F4 as a script — FILIUS' „zwei Rechnernetze“ built
// anew, set up and pinged across, without a mouse —; two fingers zoom the
// surface and never the page (M7); every action without a right click
// (long press, the three-dot button, the documentation's menu); every
// target at least 44 px, nothing beyond the screen's edge.

import { expect, test, type Page } from '@playwright/test';
import { drawing, onDevice, openEditor, serveEditor } from './editorPage.js';
import { fingers, type Fingers, type Point } from './fingers.js';

let server: { readonly base: string; readonly close: () => Promise<void> };

test.use({ hasTouch: true });

test.beforeAll(async () => {
  server = await serveEditor();
});

test.afterAll(async () => {
  await server.close();
});

const sheet = (page: Page) => page.getByRole('complementary', { name: 'Einstellungen' });
const field = (page: Page, name: string) => sheet(page).locator(`input[name="${name}"]`);

async function centreOf(page: Page, selector: string): Promise<Point> {
  const box = (await page.locator(selector).first().boundingBox())!;
  return { x: box.x + box.width / 2, y: box.y + box.height / 2 };
}

/** A point of the surface by its share of the surface's width and height. */
async function surfaceAt(page: Page, across: number, down: number): Promise<Point> {
  const box = (await page.locator('svg.filius-canvas').boundingBox())!;
  return { x: box.x + box.width * across, y: box.y + box.height * down };
}

/** A device dragged from the palette by finger; its sheet closed again (it opens with the new device chosen). */
async function place(page: Page, finger: Fingers, kind: string, at: Point): Promise<string> {
  const before = new Set((await drawing(page)).nodes.map((node) => node.id));
  await finger.drag(await centreOf(page, `[data-palette="${kind}"]`), at);
  if (kind === 'router') await page.getByRole('dialog').getByRole('button', { name: '2', exact: true }).tap();
  await expect.poll(async () => (await drawing(page)).nodes.length).toBe(before.size + 1);
  await sheet(page).getByRole('button', { name: 'Schließen' }).tap();
  await expect(sheet(page)).toHaveCount(0);
  return (await drawing(page)).nodes.find((node) => !before.has(node.id))!.id;
}

/** A field of the sheet typed into after a tap, as the iPad's keyboard types. */
async function type(page: Page, name: string, text: string): Promise<void> {
  await field(page, name).tap();
  await field(page, name).fill(text);
  await field(page, name).press('Enter');
}

test('builds FILIUS\' „zwei Rechnernetze“ by finger and pings across (the acceptance of F4)', async ({ page }) => {
  test.setTimeout(120_000);
  await openEditor(page, server.base, 'new');
  const finger = await fingers(page);
  const pcA = await place(page, finger, 'pc', await surfaceAt(page, 0.18, 0.25));
  const switchA = await place(page, finger, 'networkSwitch', await surfaceAt(page, 0.2, 0.6));
  const router = await place(page, finger, 'router', await surfaceAt(page, 0.5, 0.42));
  const switchB = await place(page, finger, 'networkSwitch', await surfaceAt(page, 0.8, 0.6));
  const pcB = await place(page, finger, 'pc', await surfaceAt(page, 0.82, 0.25));

  // The cable tool: from device to device, a free port each; tapped again, it is off.
  await page.locator('[data-palette="cable"]').tap();
  for (const [from, to] of [
    [pcA, switchA],
    [switchA, router],
    [router, switchB],
    [switchB, pcB],
  ] as const) {
    const count = (await drawing(page)).links.length;
    await finger.drag(await onDevice(page, from), await onDevice(page, to));
    await expect.poll(async () => (await drawing(page)).links.length).toBe(count + 1);
  }
  await page.locator('[data-palette="cable"]').tap();
  await expect(page.locator('[data-palette="cable"]')).toHaveAttribute('aria-pressed', 'false');

  // The addresses, in the sheet a tap on a device opens.
  for (const [id, address, gateway] of [
    [pcA, '141.99.1.10', '141.99.1.1'],
    [pcB, '141.99.2.10', '141.99.2.1'],
  ] as const) {
    await finger.tap(await onDevice(page, id));
    await expect(sheet(page)).toBeVisible();
    await type(page, 'ipAddress', address);
    await type(page, 'subnetMask', '255.255.255.0');
    await type(page, 'defaultGateway', gateway);
    await sheet(page).getByRole('button', { name: 'Schließen' }).tap();
  }
  // The router's first card went to the first switch (the first cable it got), the second to the other.
  await finger.tap(await onDevice(page, router));
  const tabs = sheet(page).getByRole('tab');
  await tabs.nth(1).tap();
  await type(page, 'ipAddress', '141.99.1.1');
  await tabs.nth(2).tap();
  await type(page, 'ipAddress', '141.99.2.1');
  await expect(tabs).toHaveText(['Allgemein', '141.99.1.1', '141.99.2.1', 'Weiterleitungstabelle']);
  await sheet(page).getByRole('button', { name: 'Schließen' }).tap();

  // The simulation; the command line installed on the first computer; a ping across the router.
  await page.getByRole('button', { name: 'Wechselt in den Aktionsmodus' }).tap();
  await expect(page.locator('svg.filius-canvas')).toHaveAttribute('data-mode', 'simulation');
  await finger.tap(await onDevice(page, pcA));
  const desktop = page.locator(`section[data-desktop="${pcA}"]`);
  await desktop.locator('[data-program="installation"]').tap();
  const installation = desktop.locator('[data-program-window="installation"]');
  await installation.locator('[data-list="available"] [role="option"]').filter({ hasText: 'Befehlszeile' }).tap();
  await installation.getByRole('button', { name: 'Installieren' }).tap();
  await installation.getByRole('button', { name: 'Änderungen annehmen' }).tap();
  await desktop.locator('[data-program="commandPrompt"]').tap();
  const terminal = desktop.locator('[data-program-window="commandPrompt"]');
  await terminal.getByRole('button', { name: 'ping', exact: true }).tap();
  const input = terminal.locator('input[name="terminalInput"]');
  await expect(input).toHaveValue('ping ');
  await input.pressSequentially('141.99.2.10');
  await input.press('Enter');
  await expect(terminal.locator('.terminal-text')).toContainText('4 Paket(e) gesendet, 4 Paket(e) empfangen', { timeout: 30_000 });
});

test('zooms the surface with two fingers and never the page (M7)', async ({ page }) => {
  await openEditor(page, server.base, 'zwei_rechnernetze_komplett.fls');
  const finger = await fingers(page);
  const canvas = page.locator('svg.filius-canvas');
  await expect(canvas).toHaveCSS('touch-action', 'none');
  const zoom = () => page.locator('[data-zoom]').getAttribute('data-zoom').then(Number);
  const page_ = () => page.evaluate(() => ({ scale: window.visualViewport?.scale ?? 1, x: window.scrollX, y: window.scrollY }));
  const start = await zoom();
  const middle = await surfaceAt(page, 0.4, 0.5);
  await finger.pinch(middle, 40, 80);
  await expect.poll(zoom).toBeGreaterThan(start * 1.5);
  expect(await page_()).toEqual({ scale: 1, x: 0, y: 0 });
  await finger.pinch(middle, 80, 30);
  await expect.poll(zoom).toBeLessThan(start);
  expect(await page_()).toEqual({ scale: 1, x: 0, y: 0 });
});

test('reaches every action without a right click: a long press, the three-dot button, the documentation', async ({ page }) => {
  await openEditor(page, server.base, 'zwei_rechnernetze_komplett.fls');
  const finger = await fingers(page);
  const view = await drawing(page);
  const notebook = view.nodes.find((node) => node.name === 'Notebook 1.11')!.id;
  // A long press opens a device's menu; „Löschen“ removes it with its cable.
  await finger.press(await onDevice(page, notebook));
  const menu = page.getByRole('menu');
  await expect(menu).toBeVisible();
  await menu.getByRole('menuitem', { name: 'Löschen' }).tap();
  await expect.poll(async () => (await drawing(page)).nodes.length).toBe(view.nodes.length - 1);

  // A tap chooses a device; its three-dot button opens the same menu.
  const router = view.nodes.find((node) => node.kind === 'router')!.id;
  await finger.tap(await onDevice(page, router));
  await sheet(page).getByRole('button', { name: 'Schließen' }).tap();
  await finger.tap(await onDevice(page, router));
  await page.getByRole('button', { name: 'Aktionen' }).tap();
  await expect(menu).toBeVisible();
  await expect(menu.getByRole('menuitem', { name: 'Löschen' })).toBeVisible();
  await finger.tap(await surfaceAt(page, 0.5, 0.95));
  await expect(menu).toHaveCount(0);

  // The documentation mode: a rectangle dragged from its sidebar, its menu by a long press, removed.
  await page.getByRole('button', { name: 'Wechselt in den Dokumentationsmodus' }).tap();
  const docs = view.docs.length;
  await finger.drag(await centreOf(page, '[data-docu="rectangle"]'), await surfaceAt(page, 0.5, 0.3));
  await expect.poll(async () => (await drawing(page)).docs.length).toBe(docs + 1);
  const rectangle = (await drawing(page)).docs.find((item) => !view.docs.some((each) => each.id === item.id))!;
  await finger.press(await centreOf(page, `g[data-doc="${rectangle.id}"] .doc-rectangle`));
  await menu.getByRole('menuitem', { name: 'Löschen' }).tap();
  await expect.poll(async () => (await drawing(page)).docs.length).toBe(docs);
});

test('gives every target 44 px at least and keeps the editor within the screen', async ({ page }) => {
  await openEditor(page, server.base, 'zwei_rechnernetze_komplett.fls');
  const finger = await fingers(page);
  const editor = page.locator('main');
  const fits = () => editor.evaluate((element) => element.scrollWidth <= element.clientWidth && element.getBoundingClientRect().right <= window.innerWidth);
  const small = (selector: string) =>
    page.locator(selector).evaluateAll((elements) =>
      elements
        .filter((element) => (element as HTMLElement).offsetParent !== null)
        .map((element) => ({ name: element.getAttribute('aria-label') ?? element.textContent?.trim() ?? '', box: element.getBoundingClientRect() }))
        .filter(({ box }) => box.width < 44 || box.height < 44)
        .map(({ name, box }) => `${name} ${Math.round(box.width)}×${Math.round(box.height)}`),
    );
  const targets =
    '.editor-toolbar button, [data-palette], [data-docu], nav button, [data-zoom] ~ button, .zoom-bar button, .device-menu-button, aside[aria-label="Einstellungen"] button, aside[aria-label="Einstellungen"] [role="tab"]';
  expect(await fits()).toBe(true);
  expect(await small(targets)).toEqual([]);
  // With a device chosen: its sheet and its three-dot button.
  const router = (await drawing(page)).nodes.find((node) => node.kind === 'router')!.id;
  await finger.tap(await onDevice(page, router));
  await expect(sheet(page)).toBeVisible();
  expect(await fits()).toBe(true);
  expect(await small(targets)).toEqual([]);
  // The documentation mode's sidebar.
  await sheet(page).getByRole('button', { name: 'Schließen' }).tap();
  await page.getByRole('button', { name: 'Wechselt in den Dokumentationsmodus' }).tap();
  expect(await fits()).toBe(true);
  expect(await small(targets)).toEqual([]);
});