// 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, scaleOf, 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');
  // A tap chooses the computer; its three-dot button opens its menu, „Desktop anzeigen“ its desktop as the sheet.
  await finger.tap(await onDevice(page, pcA));
  await page.getByRole('button', { name: 'Aktionen' }).tap();
  await page.getByRole('menuitem', { name: 'Desktop anzeigen' }).tap();
  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('puts a device or an item down where it is when a second finger comes or the browser takes the touch', async ({ page }) => {
  for (const gesture of ['dragThenPinch', 'dragThenCancel'] as const) {
    // Each on a fresh page: the pinch zooms, and the next device would be elsewhere.
    await openEditor(page, server.base, 'zwei_rechnernetze_komplett.fls');
    const finger = await fingers(page);
    const id = (await drawing(page)).nodes[0]!.id;
    const before = (await drawing(page)).nodes.find((node) => node.id === id)!;
    const from = await onDevice(page, id);
    await finger[gesture](from, { x: from.x + 40, y: from.y + 60 });
    // In the document, not only on the screen: the drag ended there and then.
    await expect
      .poll(async () => {
        const now = (await drawing(page)).nodes.find((node) => node.id === id)!;
        return now.x !== before.x || now.y !== before.y;
      }, { message: gesture })
      .toBe(true);
    const shown = await page.locator(`g.device[data-node="${id}"]`).getAttribute('data-box');
    await page.waitForTimeout(300);
    expect(await page.locator(`g.device[data-node="${id}"]`).getAttribute('data-box')).toBe(shown);
  }
  // A rectangle of the documentation, its drag taken by the browser: it too stays where it was dragged.
  await openEditor(page, server.base, 'nat_with_mapped_port.fls');
  const finger = await fingers(page);
  await page.locator('button[name="documentationMode"]').tap();
  const rectangle = (await drawing(page)).docs.find((item) => item.kind === 'rectangle')!;
  const area = (await page.locator(`g[data-doc="${rectangle.id}"]`).boundingBox())!;
  const middle = { x: area.x + area.width / 2, y: area.y + area.height / 2 };
  await finger.dragThenCancel(middle, { x: middle.x + 40, y: middle.y + 30 });
  await expect.poll(async () => (await drawing(page)).docs.find((item) => item.id === rectangle.id)!.x).not.toBe(rectangle.x);
});

test("resizes a rectangle of the documentation by its handles, and moves and resizes a text by its grip and handles, with a finger", async ({ page }) => {
  await openEditor(page, server.base, 'nat_with_mapped_port.fls');
  const finger = await fingers(page);
  await page.locator('button[name="documentationMode"]').tap();
  const docOf = async (id: string) => (await drawing(page)).docs.find((item) => item.id === id)!;
  const frameOf = async (id: string) => {
    const item = await docOf(id);
    return [item.x, item.y, item.width, item.height].map(Math.round);
  };
  const handle = (name: string) => page.locator(`[data-handle="${name}"]`);
  const scale = await scaleOf(page);

  // A rectangle tapped: its handles, each a finger's target, the three-dot button clear of them.
  const rectangle = (await drawing(page)).docs.find((item) => item.kind === 'rectangle')!;
  await finger.tap(await centreOf(page, `g[data-doc="${rectangle.id}"] .doc-rectangle`));
  await expect(page.locator(`g[data-doc="${rectangle.id}"]`)).toHaveAttribute('data-focused', 'true');
  const names = await page.locator('[data-handle]').evaluateAll((all) => all.map((each) => each.getAttribute('data-handle')));
  expect(names).toEqual(expect.arrayContaining(['top-left', 'top-right', 'bottom-right', 'bottom-left']));
  for (const box of await page.locator('[data-handle]').evaluateAll((all) => all.map((each) => each.getBoundingClientRect().toJSON() as DOMRect))) expect([box.width, box.height]).toEqual([44, 44]);
  const menu = (await page.locator('.device-menu-button').boundingBox())!;
  for (const box of await page.locator('[data-handle]').evaluateAll((all) => all.map((each) => each.getBoundingClientRect().toJSON() as DOMRect))) {
    expect(box.y >= menu.y + menu.height || box.y + box.height <= menu.y || box.x >= menu.x + menu.width || box.x + box.width <= menu.x).toBe(true);
  }
  // The bottom right corner dragged 60 right and 40 down: wider and higher by as much in the drawing, the top left kept.
  const [x, y, width, height] = await frameOf(rectangle.id);
  const bottomRight = await centreOf(page, '[data-handle="bottom-right"]');
  await finger.drag(bottomRight, { x: bottomRight.x + 60, y: bottomRight.y + 40 });
  await expect.poll(() => frameOf(rectangle.id)).toEqual([x, y, Math.round(width! + 60 / scale), Math.round(height! + 40 / scale)]);
  // The top left one 30 left: the right edge kept.
  const wider = await frameOf(rectangle.id);
  const topLeft = await centreOf(page, '[data-handle="top-left"]');
  await finger.drag(topLeft, { x: topLeft.x - 30, y: topLeft.y });
  await expect.poll(async () => (await frameOf(rectangle.id))[0]).toBe(Math.round(wider[0]! - 30 / scale));
  const [left, , across] = await frameOf(rectangle.id);
  expect(Math.abs(left! + across! - (wider[0]! + wider[2]!))).toBeLessThanOrEqual(1);

  // A long press on a handle opens the rectangle's menu, as on the rectangle.
  await finger.press(await centreOf(page, '[data-handle="top-left"]'));
  await expect(page.getByRole('menu').getByRole('group', { name: 'Farbe' })).toBeVisible();
  await page.keyboard.press('Escape');
  await expect(page.getByRole('menu')).toHaveCount(0);

  // The text in its top edge lies partly under a handle: tapped there, the text is chosen and typed into, not the rectangle.
  const below = (await drawing(page)).docs.find((item) => item.kind === 'text' && item.text.startsWith('Hosts'))!;
  const words = (await page.locator(`g[data-doc="${below.id}"] .doc-text`).boundingBox())!;
  const covering = (await page.locator('[data-handle]').evaluateAll((all) => all.map((each) => each.getBoundingClientRect().toJSON() as DOMRect)))
    .map((box) => ({ left: Math.max(box.x, words.x), top: Math.max(box.y, words.y), right: Math.min(box.x + box.width, words.x + words.width), bottom: Math.min(box.y + box.height, words.y + words.height) }))
    .find((both) => both.right - both.left > 4 && both.bottom - both.top > 4)!;
  expect(covering).toBeDefined();
  await finger.tap({ x: (covering.left + covering.right) / 2, y: (covering.top + covering.bottom) / 2 });
  await expect(page.getByRole('textbox', { name: 'Text' })).toBeVisible();
  await expect(page.locator(`g[data-doc="${below.id}"]`)).toHaveAttribute('data-focused', 'true');

  // A text with room around it, tapped: a grip above its top left corner moves it — its size kept.
  await page.getByRole('textbox', { name: 'Text' }).press('Escape');
  const text = (await drawing(page)).docs.find((item) => item.kind === 'text' && item.text.startsWith('Traffic'))!;
  await finger.tap(await centreOf(page, `g[data-doc="${text.id}"] .doc-text`));
  await expect(page.getByRole('textbox', { name: 'Text' })).toBeVisible();
  await expect(handle('move')).toBeVisible();
  // The handles sit on the blue band around the text (where Java takes hold of it), not on its words.
  const bandBox = (await page.locator(`g[data-doc="${text.id}"] .doc-focus`).boundingBox())!;
  const cornerAt = await centreOf(page, '[data-handle="bottom-right"]');
  expect(Math.abs(cornerAt.x - (bandBox.x + bandBox.width + scale))).toBeLessThanOrEqual(1.5);
  expect(Math.abs(cornerAt.y - (bandBox.y + bandBox.height + scale))).toBeLessThanOrEqual(1.5);
  // Every point of a handle's target takes the finger, also where it lies over the field typed into.
  const hidden = await page.locator('[data-handle]').evaluateAll((all) =>
    all.flatMap((each) => {
      const box = each.getBoundingClientRect();
      const points = [
        [box.left + 3, box.top + 3],
        [box.right - 3, box.top + 3],
        [box.left + 3, box.bottom - 3],
        [box.right - 3, box.bottom - 3],
      ];
      return points.filter(([x, y]) => document.elementFromPoint(x!, y!)?.closest('[data-handle]') !== each).map(() => each.getAttribute('data-handle'));
    }),
  );
  expect(hidden).toEqual([]);
  const before = await frameOf(text.id);
  const grip = await centreOf(page, '[data-handle="move"]');
  await finger.drag(grip, { x: grip.x + 50, y: grip.y + 30 });
  await expect.poll(() => frameOf(text.id)).toEqual([Math.round(before[0]! + 50 / scale), Math.round(before[1]! + 30 / scale), before[2], before[3]]);
  // Its bottom right handle: wider and higher; what it says is unchanged.
  const moved = await frameOf(text.id);
  const corner = await centreOf(page, '[data-handle="bottom-right"]');
  await finger.drag(corner, { x: corner.x + 40, y: corner.y + 20 });
  await expect.poll(() => frameOf(text.id)).toEqual([moved[0], moved[1], Math.round(moved[2]! + 40 / scale), Math.round(moved[3]! + 20 / scale)]);
  expect((await docOf(text.id)).text).toBe(text.text);

  // Two fingers, the second on a handle: they zoom, and the text keeps its size.
  const sized = await frameOf(text.id);
  const onHandle = await centreOf(page, '[data-handle="bottom-right"]');
  await finger.pinch({ x: onHandle.x - 40, y: onHandle.y }, 40, 120);
  await expect.poll(() => scaleOf(page)).toBeGreaterThan(scale * 1.5);
  expect(await frameOf(text.id)).toEqual(sized);
});

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, [data-handle], 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([]);
});