// The editor on a project of a real server F (F5.3b), three people in three
// browsers: Mia and Ben write, Rita only reads. What one moves the others
// see, and each sees the others (a circle each, a frame round a device
// another has chosen, a dot on a window another has open too); Rita gets
// everything shown and nothing to change; Mia starts the
// simulation and it runs for all, named after her; Ben's ping in a command
// line is in Mia's too (one window per computer, as in Java); Rita's typing
// there is refused, and she is told; the project frozen, Ben reads and is
// told, thawed he writes again; his grant ended, he is told and the editor
// goes.

import { createHash } from 'node:crypto';
import { mkdtempSync, readFileSync, statSync } from 'node:fs';
import { tmpdir } from 'node:os';
import { join } from 'node:path';
import { expect, test, type Browser, type Page } from '@playwright/test';
import { BLOB_THRESHOLD_BYTES } from '@mdg-filius/doc';
import { drag, onDevice, serveEditor, showDesktop } from './editorPage.js';
import { colorOf } from '../src/remote/presence.js';
import { startServerF, type ServerF } from './serverF.js';

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

test.beforeAll(async () => {
  editor = await serveEditor();
  f = await startServerF(editor.base);
});

test.afterAll(async () => {
  await f?.close();
  await editor?.close();
});

/** A person in their own browser context, signed in, the project open. */
async function person(browser: Browser, project: string, name: string, level: 'read' | 'write' = 'write', user?: string): Promise<Page> {
  const context = await browser.newContext();
  await f.signIn(context, project, { name, level, ...(user === undefined ? {} : { user }) });
  const page = await context.newPage();
  await page.goto(`${editor.base}?project=${project}&server=${encodeURIComponent(f.base)}`);
  await page.waitForSelector('svg.filius-canvas');
  return page;
}

const box = (page: Page, id: string) => page.locator(`g.device[data-node="${id}"]`).getAttribute('data-box');
const canvas = (page: Page) => page.locator('svg.filius-canvas');
const desktop = (page: Page, id: string) => page.locator(`section[data-desktop="${id}"]`);
const note = (page: Page, kind: string) => page.locator(`[data-note="${kind}"]`);

async function commandLine(page: Page, id: string) {
  await showDesktop(page, id);
  await desktop(page, id).locator('[data-program="commandPrompt"]').click();
  const window = desktop(page, id).locator('[data-program-window="commandPrompt"]');
  return { input: window.locator('input[name="terminalInput"]'), text: window.locator('.terminal-text') };
}

test('three people in one project of F: moving, reading only, one simulation for all, a frozen project, an ended grant', async ({ browser }) => {
  test.setTimeout(120_000);
  const project = await f.project('java-examples/internetwork_komplett.fls');
  const [miaUser, benUser, ritaUser] = [crypto.randomUUID(), crypto.randomUUID(), crypto.randomUUID()];
  const mia = await person(browser, project.id, 'Mia', 'write', miaUser);
  const ben = await person(browser, project.id, 'Ben', 'write', benUser);
  const rita = await person(browser, project.id, 'Rita', 'read', ritaUser);
  const devices = await mia.locator('g.device').count();
  expect(devices).toBeGreaterThan(5);
  for (const page of [ben, rita]) await expect(page.locator('g.device')).toHaveCount(devices);

  // Each sees the others, by their initials.
  for (const [page, others] of [
    [mia, [benUser, ritaUser]],
    [ben, [miaUser, ritaUser]],
    [rita, [miaUser, benUser]],
  ] as const) {
    await expect(page.locator('[data-person]')).toHaveCount(2);
    for (const other of others) await expect(page.locator(`[data-person="${other}"]`)).toBeVisible();
  }
  await expect(mia.locator(`[data-person="${benUser}"]`)).toHaveText('B');

  // Mia chooses a device: Ben sees a frame round it in her colour, until she lets it go.
  const notebook = project.node('Notebook 1.10');
  const router = project.node('Switch 1');
  const routerAt = await onDevice(mia, router);
  await mia.mouse.click(routerAt.x, routerAt.y);
  const frame = ben.locator(`g.device[data-node="${router}"] rect.chosen-by`);
  await expect(frame).toHaveCount(1);
  // The ticket gave Mia no colour: she has the one her id gives, the same in every editor.
  await expect(frame).toHaveAttribute('data-color', colorOf({ id: miaUser, name: 'Mia', color: '' }));
  await mia.getByRole('complementary', { name: 'Einstellungen' }).getByRole('button', { name: 'Schließen' }).click();
  await expect(frame).toHaveCount(0);
  // Nobody sees their own frame.
  await expect(mia.locator('rect.chosen-by')).toHaveCount(0);

  // Mia moves a device; Ben and Rita see it where she put it.
  const before = await box(mia, notebook);
  const from = await onDevice(mia, notebook);
  await drag(mia, from, { x: from.x + 120, y: from.y + 40 });
  const moved = await box(mia, notebook);
  expect(moved).not.toBe(before);
  for (const page of [ben, rita]) await expect(page.locator(`g.device[data-node="${notebook}"]`)).toHaveAttribute('data-box', moved!);

  // Rita reads: no palette, no undo, the note; her drag moves nothing; her sheet's fields are disabled; she cannot start.
  await expect(note(rita, 'readOnly')).toHaveText('Nur ansehen');
  await expect(rita.locator('[data-palette]')).toHaveCount(0);
  await expect(rita.getByRole('button', { name: 'Rückgängig' })).toHaveCount(0);
  await expect(rita.locator('button[name="simulationMode"]')).toBeDisabled();
  const ritaFrom = await onDevice(rita, notebook);
  await drag(rita, ritaFrom, { x: ritaFrom.x + 80, y: ritaFrom.y });
  await expect(rita.locator(`g.device[data-node="${notebook}"]`)).toHaveAttribute('data-box', moved!);
  await rita.mouse.click(ritaFrom.x, ritaFrom.y);
  const sheet = rita.getByRole('complementary', { name: 'Einstellungen' });
  await expect(sheet).toBeVisible();
  await expect(sheet.locator('input[name="ipAddress"]')).toBeDisabled();
  await sheet.getByRole('button', { name: 'Schließen' }).click();
  await expect(note(mia, 'readOnly')).toHaveCount(0);

  // Mia starts: the simulation runs for all, named after her.
  await mia.locator('button[name="simulationMode"]').click();
  for (const page of [mia, ben, rita]) {
    await expect(canvas(page)).toHaveAttribute('data-mode', 'simulation');
    await expect(note(page, 'startedBy')).toHaveText('Simulation gestartet von Mia');
  }

  // Ben pings from the notebook's command line; Mia's command line of it shows the same.
  const bens = await commandLine(ben, notebook);
  await bens.input.fill('ping 141.99.5.10');
  await bens.input.press('Enter');
  const mias = await commandLine(mia, notebook);
  for (const each of [bens, mias]) await expect(each.text).toContainText('4 Paket(e) gesendet, 4 Paket(e) empfangen', { timeout: 30_000 });
  // Both have the notebook's desktop open: each sees the other's dot on it.
  await expect(desktop(mia, notebook).locator(`[data-watcher="${benUser}"]`)).toBeVisible();
  await expect(desktop(ben, notebook).locator(`[data-watcher="${miaUser}"]`)).toBeVisible();
  // Their taps chose the notebook too (its three-dot button), but in the simulation that is no frame for the others —
  // told in the same message as the open desktop just seen.
  for (const page of [mia, ben]) await expect(page.locator('rect.chosen-by')).toHaveCount(0);
  // Rita may look, not type; she sees both on the desktop, and they see her.
  const ritas = await commandLine(rita, notebook);
  await expect(desktop(rita, notebook).locator('[data-watcher]')).toHaveCount(2);
  await expect(desktop(mia, notebook).locator(`[data-watcher="${ritaUser}"]`)).toBeVisible();
  await expect(ritas.text).toContainText('ping 141.99.5.10');
  await ritas.input.fill('ipconfig');
  await ritas.input.press('Enter');
  await expect(rita.getByText('Hier können Sie nur zuschauen.')).toBeVisible();

  // Ben stops it, for everyone.
  await ben.locator('button[name="designMode"]').click();
  for (const page of [mia, ben, rita]) await expect(canvas(page)).toHaveAttribute('data-mode', 'design');

  // Frozen: Ben reads and is told; thawed, he writes again.
  expect((await f.service('POST', `/svc/projects/${project.id}/freeze`, { frozen: true })).status).toBe(200);
  await expect(note(ben, 'readOnly')).toHaveText('Eingefroren – nur ansehen');
  await expect(ben.locator('[data-palette]')).toHaveCount(0);
  expect((await f.service('POST', `/svc/projects/${project.id}/freeze`, { frozen: false })).status).toBe(200);
  await expect(note(ben, 'readOnly')).toHaveCount(0);
  await expect(ben.locator('[data-palette]').first()).toBeVisible();
  const benFrom = await onDevice(ben, notebook);
  await drag(ben, benFrom, { x: benFrom.x - 60, y: benFrom.y });
  const movedByBen = await box(ben, notebook);
  expect(movedByBen).not.toBe(moved);
  await expect(mia.locator(`g.device[data-node="${notebook}"]`)).toHaveAttribute('data-box', movedByBen!);

  // Ben's grant ends: he is told, and the editor goes.
  expect((await f.service('POST', '/svc/revoke', { user: benUser, project: project.id })).status).toBe(200);
  await expect(ben.getByRole('alert')).toHaveText('Ihr Zugang zu diesem Projekt wurde beendet.');
  await expect(canvas(ben)).toHaveCount(0);
  await expect(canvas(mia)).toBeVisible();
});

test('shows a drag to the others while it lasts, and stores it in F once, when it is let go', async ({ browser }) => {
  const project = await f.project('java-examples/internetwork_komplett.fls');
  const mia = await person(browser, project.id, 'Mia');
  const ben = await person(browser, project.id, 'Ben');
  const id = project.node('Rechner 3.10');
  const before = await box(ben, id);
  await expect.poll(() => f.updateCount(project.id)).toBe(0);
  const from = await onDevice(mia, id);
  await mia.mouse.move(from.x, from.y);
  await mia.mouse.down();
  for (let step = 1; step <= 30; step++) {
    await mia.mouse.move(from.x - 3 * step, from.y + 2 * step);
    await mia.waitForTimeout(16);
  }
  // Still held: Mia and Ben see it on its way, F has stored nothing of it.
  expect(await box(mia, id)).not.toBe(before);
  await expect.poll(async () => (await box(ben, id)) !== before).toBe(true);
  expect(await f.updateCount(project.id)).toBe(0);
  await mia.mouse.up();
  await expect.poll(async () => box(ben, id)).toBe(await box(mia, id));
  await expect.poll(() => f.updateCount(project.id)).toBe(1);
  await mia.waitForTimeout(500);
  expect(await f.updateCount(project.id)).toBe(1);
  expect(await box(ben, id)).toBe(await box(mia, id));
});

test('takes a large picture one person imports to F as a blob, and shows it to another', async ({ browser }) => {
  test.setTimeout(120_000);
  const project = await f.project('java-examples/internetwork_komplett.fls');
  const notebook = project.node('Notebook 1.10');
  const mia = await person(browser, project.id, 'Mia');
  const ben = await person(browser, project.id, 'Ben');
  // A picture far over 16 KB: a screenshot of the page.
  const file = join(mkdtempSync(join(tmpdir(), 'filius-blob-')), 'bild.png');
  await mia.screenshot({ path: file });
  const size = statSync(file).size;
  expect(size).toBeGreaterThan(BLOB_THRESHOLD_BYTES);
  await mia.locator('button[name="simulationMode"]').click();
  for (const page of [mia, ben]) await expect(canvas(page)).toHaveAttribute('data-mode', 'simulation');
  const open = async (page: Page) => {
    return showDesktop(page, notebook);
  };
  const miaDesktop = await open(mia);
  await miaDesktop.locator('[data-program="installation"]').click();
  const installation = miaDesktop.locator('[data-program-window="installation"]');
  for (const program of ['Datei-Explorer', 'Bildbetrachter']) await installation.locator('[data-list="available"] [role="option"]').filter({ hasText: program }).click();
  await installation.getByRole('button', { name: 'Installieren' }).click();
  await installation.getByRole('button', { name: 'Änderungen annehmen' }).click();
  await miaDesktop.locator('[data-program="fileExplorer"]').click();
  const explorer = miaDesktop.locator('[data-program-window="fileExplorer"]');
  await explorer.getByRole('toolbar', { name: 'Aktionen' }).getByRole('button', { name: 'Importieren' }).click();
  const importing = explorer.getByRole('dialog', { name: 'Datei importieren' });
  await importing.locator('input[type="file"]').setInputFiles(file);
  await importing.getByRole('button', { name: 'Datei importieren' }).click();
  await expect(importing.getByRole('status')).toHaveText('Datei erfolgreich importiert!');
  // Ben opens it in his viewer: the picture, as large as the page was.
  const benDesktop = await open(ben);
  await benDesktop.locator('[data-program="imageViewer"]').click();
  const viewer = benDesktop.locator('[data-program-window="imageViewer"]');
  await viewer.getByRole('button', { name: 'Öffnen' }).click();
  const dialog = viewer.getByRole('dialog', { name: 'Datei Öffnen' });
  await dialog.locator('.file-dialog-entries button', { hasText: 'bild.png' }).click();
  await dialog.getByRole('button', { name: 'Öffnen' }).click();
  await expect.poll(() => viewer.getByRole('img', { name: 'Bild' }).evaluate((image: HTMLImageElement) => image.naturalWidth)).toBe(mia.viewportSize()!.width);
  // In F's store under its SHA-256.
  const sha = createHash('sha256').update(readFileSync(file)).digest('hex');
  expect(await f.blobSize(sha)).toBe(size);
});

test('tells the dashboard over the bridge who else is in the project, each time it changes', async ({ browser }) => {
  const project = await f.project('java-examples/zwei_rechnernetze_komplett.fls');
  const context = await browser.newContext();
  await f.signIn(context, project.id, { name: 'Mia' });
  const page = await context.newPage();
  // The page is its own parent here: what it tells the dashboard comes back to it.
  const origin = new URL(editor.base).origin;
  await page.addInitScript(() => {
    (window as unknown as { told: unknown[] }).told = [];
    window.addEventListener('message', (event) => (window as unknown as { told: unknown[] }).told.push(event.data));
  });
  await page.goto(`${editor.base}?project=${project.id}&server=${encodeURIComponent(f.base)}&parent=${encodeURIComponent(origin)}`);
  await page.waitForSelector('svg.filius-canvas');
  const people = () => page.evaluate(() => (window as unknown as { told: { type?: string; people?: { name: string }[] }[] }).told.filter((message) => message.type === 'people').map((message) => message.people!.map((each) => each.name)));
  await expect.poll(people).toEqual([[]]);
  const benUser = crypto.randomUUID();
  const ben = await person(browser, project.id, 'Ben', 'write', benUser);
  await expect.poll(people).toEqual([[], ['Ben']]);
  // Mia in a second tab: she is not one of the others for herself, and Ben sees her once.
  const second = await context.newPage();
  await second.goto(`${editor.base}?project=${project.id}&server=${encodeURIComponent(f.base)}`);
  await second.waitForSelector('svg.filius-canvas');
  await expect(ben.locator('[data-person]')).toHaveCount(1);
  await expect(second.locator('[data-person]')).toHaveCount(1);
  await expect(second.locator(`[data-person="${benUser}"]`)).toBeVisible();
  await second.close();
  await ben.context().close();
  await expect.poll(people, { timeout: 40_000 }).toEqual([[], ['Ben'], []]);
  await context.close();
});

test('says why when F ends only the room: the editor goes as when the document is let go', async ({ browser }) => {
  const project = await f.project('java-examples/zwei_rechnernetze_komplett.fls');
  const context = await browser.newContext();
  await f.signIn(context, project.id, { name: 'Mia' });
  const page = await context.newPage();
  await page.routeWebSocket(/\/sim/, (socket) => socket.close({ code: 4403, reason: 'noAccess' }));
  await page.goto(`${editor.base}?project=${project.id}&server=${encodeURIComponent(f.base)}`);
  await expect(page.getByRole('alert')).toHaveText('Sie haben keinen Zugang zu diesem Projekt.');
  await context.close();
});

test('says why when F refuses: no session, a project it does not know', async ({ page }) => {
  const project = await f.project('java-examples/zwei_rechnernetze_komplett.fls');
  await page.goto(`${editor.base}?project=${project.id}&server=${encodeURIComponent(f.base)}`);
  await expect(page.getByRole('alert')).toHaveText('Die Anmeldung ist abgelaufen. Öffnen Sie das Projekt im Dashboard neu.');
  await page.goto(`${editor.base}?project=not-a-project&server=${encodeURIComponent(f.base)}`);
  await expect(page.getByRole('alert')).toHaveText('Diese Adresse nennt kein Projekt.');
});