const { test, expect } = require('@playwright/test');
const {
  EXPECTED_MATCH_COUNT,
  FACEAI_BASE_URL,
  buildHandoffUrl,
  buildSimulatorUrl,
  getSearchArtifacts,
  getSelfiePath,
  readUtf8
} = require('./faceai-test-utils');

const FACEAI_HOME_URL_RE = /http:\/\/(localhost|127\.0\.0\.1):3001\/?(?:\?.*)?$/;
const FACEAI_CALLBACK_URL_RE = /http:\/\/(localhost|127\.0\.0\.1):3001\/auth\/callback\?token=/;
const FACEAI_RETURN_URL_RE = /http:\/\/(localhost|127\.0\.0\.1):8080\/faceai_return\.php\?resultId=.*token=.*/;
const LEGACY_HOME_URL_RE = /http:\/\/(localhost|127\.0\.0\.1):8080\/index\.jsp$/;

function buildLegacySimulatorReturnMatcher(raceId) {
  return new RegExp(`http:\\/\\/(localhost|127\\.0\\.0\\.1):8080\\/faceai_simulator\\.php\\?raceId=${raceId}.*`);
}

function assertLogDoesNotContain(content, patterns, label) {
  for (const pattern of patterns) {
    expect(content, `${label} should not contain ${pattern}`).not.toMatch(pattern);
  }
}

async function waitForFaceAiHome(page) {
  await page.waitForURL((url) => FACEAI_CALLBACK_URL_RE.test(url.toString()) || FACEAI_HOME_URL_RE.test(url.toString()), {
    timeout: 60 * 1000
  });
  await expect(page.getByRole('heading', { name: 'Trova le tue foto con un selfie' })).toBeVisible();
}

async function launchFromSimulator(page, options = {}) {
  const simulatorUrl = buildSimulatorUrl(options);
  await page.goto(simulatorUrl, { waitUntil: 'domcontentloaded' });
  await expect(page.locator('#faceaiLaunchButton')).toBeVisible();
  await expect(page.locator('select#tipoPuntoFoto')).toHaveCount(0);
  await page.locator('#faceaiLaunchButton').click();
  await waitForFaceAiHome(page);
  return simulatorUrl;
}

async function enterViaHandoff(page, options = {}) {
  await page.goto(buildHandoffUrl(options), { waitUntil: 'domcontentloaded' });
  await waitForFaceAiHome(page);
}

async function startSearch(page, selfieName) {
  const createResponsePromise = page.waitForResponse((response) => {
    return response.url().includes('/api/searches')
      && response.request().method() === 'POST'
      && response.status() === 201;
  });

  await page.locator('input[type="file"]').setInputFiles(getSelfiePath(selfieName));
  await expect(page.getByText(selfieName)).toBeVisible();
  await page.getByRole('button', { name: 'Avvia ricerca Face ID' }).click();

  const createResponse = await createResponsePromise;
  return createResponse.json();
}

async function fetchSearchStatus(page, searchId) {
  return page.evaluate(async ({ searchId }) => {
    const response = await fetch(`/api/searches/${searchId}`, { credentials: 'include' });
    const body = await response.json().catch(() => null);
    return {
      statusCode: response.status,
      body
    };
  }, { searchId });
}

async function waitForSearchCondition(page, searchId, predicate, timeoutMs = 30 * 1000) {
  const deadline = Date.now() + timeoutMs;
  let lastPayload = null;

  while (Date.now() < deadline) {
    const payload = await fetchSearchStatus(page, searchId);
    lastPayload = payload;
    if (payload.statusCode === 200 && predicate(payload.body)) {
      return payload.body;
    }

    await page.waitForTimeout(250);
  }

  throw new Error(`Timed out waiting for search ${searchId}. Last payload: ${JSON.stringify(lastPayload)}`);
}

async function waitForLegacyResult(page, expectedMatchCount = null) {
  await page.waitForURL(FACEAI_RETURN_URL_RE, {
    timeout: 6 * 60 * 1000
  });
  await expect(page.locator('.sim-banner')).toContainText('Vista filtrata da FaceAI');
  if (expectedMatchCount === null) {
    await expect(page.locator('.gallery-card').first()).toBeVisible();
    return;
  }

  await expect(page.locator('.sim-banner')).toContainText(String(expectedMatchCount));
  await expect(page.locator('.gallery-card')).toHaveCount(expectedMatchCount);
}

async function verifySearchLogs(searchId, { expectedMatchCount, expectedSelfieName }) {
  const artifacts = getSearchArtifacts(searchId);
  const [backendLog, processorLog, workerLog, matcherLog] = await Promise.all([
    readUtf8(artifacts.backendLogPath),
    readUtf8(artifacts.processorLogPath),
    readUtf8(artifacts.workerLogPath),
    readUtf8(artifacts.matcherLogPath)
  ]);

  expect(workerLog).toContain('Completed FaceAI search');
  if (expectedMatchCount !== undefined) {
    expect(workerLog).toContain(`"matchCount":${expectedMatchCount}`);
  }
  if (expectedSelfieName) {
    expect(matcherLog).toContain(expectedSelfieName);
  }

  assertLogDoesNotContain(backendLog, [/\bnpm error\b/i, /\berror:\b/i, /\bfailed\b/i], 'backend.log');
  assertLogDoesNotContain(processorLog, [new RegExp(`Failed FaceAI search ${searchId}`, 'i'), /\bnpm error\b/i], 'processor.log');
  assertLogDoesNotContain(workerLog, [/FaceAI search failed/i], 'worker.log');
  assertLogDoesNotContain(matcherLog, [/\[ERROR\]/i, /Traceback/i], 'matcher.log');

  return { backendLog, processorLog, workerLog, matcherLog };
}

async function closeContexts(contexts) {
  await Promise.all(contexts.map((context) => context.close()));
}

test('runs the simulator flow through FaceAI and returns to the filtered legacy result', async ({ page }) => {
  await launchFromSimulator(page, {
    raceId: '202',
    raceSlug: 'mezza-di-pisa',
    raceName: 'Mezza di Pisa',
    raceFolder: 'PISA'
  });

  const search = await startSearch(page, 'DSC_1960.JPG');

  await waitForLegacyResult(page, EXPECTED_MATCH_COUNT);
  await expect(page.locator('.gallery-card').filter({ hasText: 'DSC_1960.JPG' }).first()).toBeVisible();

  await verifySearchLogs(search.id, {
    expectedMatchCount: EXPECTED_MATCH_COUNT,
    expectedSelfieName: 'DSC_1960.JPG'
  });
});

test('shows the unsupported-race message when the current race has no PKL data and lets the user go back', async ({ page }) => {
  await launchFromSimulator(page, {
    raceId: '404',
    raceSlug: 'corsa-di-livorno',
    raceName: 'Corsa di Livorno',
    raceFolder: 'LIVORNO'
  });

  await expect(page.locator('.faceai-feedback')).toContainText('FaceAI non è disponibile per questa gara.');
  await expect(page.locator('input[type="file"]')).toBeDisabled();
  await expect(page.getByRole('button', { name: 'Scegli immagine' })).toBeDisabled();

  await page.waitForTimeout(2000);
  await expect(page).toHaveURL(FACEAI_HOME_URL_RE);

  await page.getByRole('button', { name: 'Torna alla pagina gara' }).click();
  await expect(page).toHaveURL(buildLegacySimulatorReturnMatcher('404'));
});

test('shows a localized invalid-race error when session race data points to a missing folder', async ({ page }) => {
  const consoleErrors = [];
  page.on('console', (message) => {
    if (message.type() === 'error') {
      consoleErrors.push(message.text());
    }
  });

  const simulatorUrl = buildSimulatorUrl({
    raceId: '405',
    lang: 'en',
    raceSlug: 'ghost-race',
    raceName: 'Ghost Race',
    raceFolder: 'THIS RACE DOES NOT EXIST'
  });

  await page.goto(simulatorUrl, { waitUntil: 'domcontentloaded' });
  await expect(page.locator('#faceaiLaunchButton')).toBeVisible();
  await page.locator('#faceaiLaunchButton').click();

  await page.waitForURL(FACEAI_HOME_URL_RE, {
    timeout: 60 * 1000
  });
  await expect(page.getByRole('heading', { name: 'Find your photos with a selfie' })).toBeVisible();
  await expect(page.locator('.faceai-feedback')).toContainText('The race data received for this session is invalid. Go back to the race page and reopen Face ID from the correct race.');
  await expect(page.locator('input[type="file"]')).toBeDisabled();
  await expect(page.getByRole('button', { name: 'Choose image' })).toBeDisabled();
  await expect(page.getByRole('button', { name: 'Start Face ID search' })).toHaveCount(0);
  await expect(page.getByRole('button', { name: 'Back to the race page' })).toBeVisible();
  await expect.poll(() => {
    return consoleErrors.find((entry) => entry.includes('[FaceAI] Invalid race data:')) || null;
  }).toContain('RACE_DIRECTORY_NOT_FOUND');
  await expect.poll(() => {
    return consoleErrors.find((entry) => entry.includes('[FaceAI] Invalid race data:')) || null;
  }).toContain('THIS RACE DOES NOT EXIST');

  await page.getByRole('button', { name: 'Back to the race page' }).click();
  await expect(page).toHaveURL(buildLegacySimulatorReturnMatcher('405'));
});

test('rejects a not-logged-in user after clicking the Face ID button and sends them back to the original race page', async ({ page }) => {
  const simulatorUrl = buildSimulatorUrl({
    raceId: '202',
    raceSlug: 'mezza-di-pisa',
    raceName: 'Mezza di Pisa',
    raceFolder: 'PISA'
  });

  await page.goto(simulatorUrl, { waitUntil: 'domcontentloaded' });
  await expect(page.locator('#faceaiLaunchButton')).toBeVisible();

  await page.evaluate(() => {
    if (window.faceAiSimulator) {
      delete window.faceAiSimulator.devUserId;
      delete window.faceAiSimulator.devDisplayName;
      delete window.faceAiSimulator.devEmail;
      delete window.faceAiSimulator.devMembershipStatus;
    }
  });

  await page.locator('#faceaiLaunchButton').click();

  await expect(page).toHaveURL(buildLegacySimulatorReturnMatcher('202'));
  await expect(page).not.toHaveURL(FACEAI_HOME_URL_RE);
  await expect(page.locator('#faceAiErrorModal')).toBeVisible();
  await expect(page.locator('#faceAiErrorModalLabel')).toContainText('Face ID non disponibile');
  await expect(page.locator('#faceAiErrorModalMessage')).toContainText('Il servizio Face ID non e al momento disponibile. Riprova piu tardi.');
});

test('shows the no-face message and allows the user to return to the race page', async ({ page }) => {
  await launchFromSimulator(page, {
    raceId: '202',
    raceSlug: 'mezza-di-pisa',
    raceName: 'Mezza di Pisa',
    raceFolder: 'PISA'
  });

  const search = await startSearch(page, 'DSC_1994.JPG');

  await waitForSearchCondition(page, search.id, (payload) => {
    return payload.status === 'completed' && payload.completionCode === 'NO_FACES_FOUND';
  }, 2 * 60 * 1000);

  await expect(page.locator('.faceai-feedback')).toContainText('Nessun volto rilevato nella foto caricata');
  await page.waitForTimeout(2000);
  await expect(page).toHaveURL(FACEAI_HOME_URL_RE);

  await verifySearchLogs(search.id, {
    expectedMatchCount: 0,
    expectedSelfieName: 'DSC_1994.JPG'
  });

  await page.getByRole('button', { name: 'Torna alla pagina gara' }).click();
  await expect(page).toHaveURL(buildLegacySimulatorReturnMatcher('202'));
});

test('lets the user retry with a valid photo after a no-face upload and then returns to the filtered legacy result', async ({ page }) => {
  await launchFromSimulator(page, {
    raceId: '202',
    raceSlug: 'mezza-di-pisa',
    raceName: 'Mezza di Pisa',
    raceFolder: 'PISA'
  });

  const noFaceSearch = await startSearch(page, 'DSC_1994.JPG');
  await waitForSearchCondition(page, noFaceSearch.id, (payload) => {
    return payload.status === 'completed' && payload.completionCode === 'NO_FACES_FOUND';
  }, 2 * 60 * 1000);

  await expect(page.locator('.faceai-feedback')).toContainText('Nessun volto rilevato nella foto caricata');
  await expect(page.locator('input[type="file"]')).toBeEnabled();

  const retrySearch = await startSearch(page, 'DSC_1960.JPG');
  await waitForLegacyResult(page, EXPECTED_MATCH_COUNT);

  await verifySearchLogs(noFaceSearch.id, {
    expectedMatchCount: 0,
    expectedSelfieName: 'DSC_1994.JPG'
  });
  await verifySearchLogs(retrySearch.id, {
    expectedMatchCount: EXPECTED_MATCH_COUNT,
    expectedSelfieName: 'DSC_1960.JPG'
  });
});

test('redirects direct-entry users without FaceAI session data back to the legacy site', async ({ browser }) => {
  const context = await browser.newContext();
  const page = await context.newPage();

  try {
    await page.goto(`${FACEAI_BASE_URL}/`, { waitUntil: 'domcontentloaded' });
    await page.waitForURL(LEGACY_HOME_URL_RE, { timeout: 30 * 1000 });
  } finally {
    await context.close();
  }
});

test('allows two users to process different photos at the same time', async ({ browser }) => {
  const contexts = [await browser.newContext(), await browser.newContext()];
  const pages = await Promise.all(contexts.map((context) => context.newPage()));

  try {
    await Promise.all([
      enterViaHandoff(pages[0], { userId: 'concurrency-user-1' }),
      enterViaHandoff(pages[1], { userId: 'concurrency-user-2' })
    ]);

    const [searchOne, searchTwo] = await Promise.all([
      startSearch(pages[0], 'DSC_1960.JPG'),
      startSearch(pages[1], 'DSC_1987.JPG')
    ]);

    await Promise.all([
      waitForLegacyResult(pages[0]),
      waitForLegacyResult(pages[1])
    ]);

    await Promise.all([
      verifySearchLogs(searchOne.id, { expectedSelfieName: 'DSC_1960.JPG' }),
      verifySearchLogs(searchTwo.id, { expectedSelfieName: 'DSC_1987.JPG' })
    ]);
  } finally {
    await closeContexts(contexts);
  }
});

test('queues the third user until a worker is free and then completes all three searches normally', async ({ browser }) => {
  const contexts = [await browser.newContext(), await browser.newContext(), await browser.newContext()];
  const pages = await Promise.all(contexts.map((context) => context.newPage()));

  try {
    await Promise.all([
      enterViaHandoff(pages[0], { userId: 'queue-user-1' }),
      enterViaHandoff(pages[1], { userId: 'queue-user-2' }),
      enterViaHandoff(pages[2], { userId: 'queue-user-3' })
    ]);

    const [searchOne, searchTwo, searchThree] = await Promise.all([
      startSearch(pages[0], 'DSC_1960.JPG'),
      startSearch(pages[1], 'DSC_1987.JPG'),
      startSearch(pages[2], 'DSC_2058.JPG')
    ]);

    const searchSessions = [
      { page: pages[0], searchId: searchOne.id },
      { page: pages[1], searchId: searchTwo.id },
      { page: pages[2], searchId: searchThree.id }
    ];

    let queuedSearch = null;
    const deadline = Date.now() + 30 * 1000;
    while (Date.now() < deadline && !queuedSearch) {
      const statuses = await Promise.all(searchSessions.map(async (session) => {
        const payload = await fetchSearchStatus(session.page, session.searchId);
        return {
          ...session,
          search: payload.body
        };
      }));

      const processingCount = statuses.filter((item) => item.search?.status === 'processing').length;
      queuedSearch = processingCount >= 2
        ? statuses.find((item) => item.search?.status === 'queued') || null
        : null;

      if (!queuedSearch) {
        await pages[0].waitForTimeout(250);
      }
    }

    expect(queuedSearch, 'one search should remain queued while two worker slots are busy').toBeTruthy();

    await waitForSearchCondition(queuedSearch.page, queuedSearch.searchId, (payload) => {
      return payload.status === 'processing' || payload.status === 'completed';
    }, 2 * 60 * 1000);

    await Promise.all(pages.map((page) => waitForLegacyResult(page)));

    await Promise.all([
      verifySearchLogs(searchOne.id, { expectedSelfieName: 'DSC_1960.JPG' }),
      verifySearchLogs(searchTwo.id, { expectedSelfieName: 'DSC_1987.JPG' }),
      verifySearchLogs(searchThree.id, { expectedSelfieName: 'DSC_2058.JPG' })
    ]);
  } finally {
    await closeContexts(contexts);
  }
});