/**
 * E2E tests for the ObsiGate image viewer (roadmap #108).
 *
 * Fixtures : `test_vault/sample-image.png` (96x64) + `test_vault/sample-vector.svg`.
 *
 * Run (local):
 *   BASE_URL=http://localhost:2029 npx playwright test tests/e2e/image-viewer.spec.js
 *   BASE_URL=http://localhost:2029 npx playwright test tests/e2e/image-viewer.spec.js --headed
 */

import { test, expect } from '@playwright/test';

const BASE = process.env.BASE_URL || 'http://localhost:2029';

const CREDS = {
  username: process.env.OBSIGATE_USER || 'admin',
  password: process.env.OBSIGATE_PASS || 'test123',
};

async function login(page) {
  await page.goto(BASE);
  const loginForm = page.locator('#login-screen');
  await expect(loginForm).toBeVisible({ timeout: 5000 }).catch(() => {});
  if (await loginForm.isVisible()) {
    await page.fill('#login-username', CREDS.username);
    await page.fill('#login-password', CREDS.password);
    await page.click('#login-btn');
  }
  await page.waitForFunction(() => window.__OBSIGATE_BOOTED === true, { timeout: 20000 });
}

async function openFile(page, vault, filePath) {
  const treeItem = page.locator(`.tree-item[data-vault="${vault}"][data-path="${filePath}"]`);
  if (!(await treeItem.count())) {
    await page.locator(`.tree-item.vault-item[data-vault="${vault}"]`).first().click();
    await treeItem.waitFor({ state: 'attached', timeout: 8000 });
  }
  await treeItem.dblclick({ timeout: 5000 });
}

test.describe('Image viewer — zoom / pan / navigation (#108)', () => {

  test('affiche l\'image dans la visionneuse dédiée (URL /api/image)', async ({ page }) => {
    // #108-B1 — l'image isolée doit pointer vers /api/image (octets), pas /raw (JSON).
    const imageResponsePromise = page.waitForResponse(
      (r) => r.url().includes('/api/image/') && r.status() === 200,
      { timeout: 15000 },
    );

    await login(page);
    await openFile(page, 'TestVault', 'sample-image.png');

    const main = page.locator('#content-area .image-viewer-container img.image-main');
    await expect(main).toBeVisible({ timeout: 10000 });
    await expect(main).toHaveAttribute('src', /\/api\/image\/TestVault\?path=/);

    const resp = await imageResponsePromise;
    expect(resp.headers()['content-type']).toContain('image/png');

    // Le badge de zoom démarre à 100 %.
    await expect(page.locator('#content-area .image-zoom-badge')).toHaveText('100%');
  });

  test('le zoom molette et le reset modifient la transform', async ({ page }) => {
    await login(page);
    await openFile(page, 'TestVault', 'sample-image.png');
    await expect(page.locator('#content-area .image-stage')).toBeVisible({ timeout: 10000 });

    const badge = page.locator('#content-area .image-zoom-badge');
    await expect(badge).toHaveText('100%');

    await page.locator('#content-area .image-stage').hover();
    await page.mouse.wheel(0, -240);
    await expect(badge).not.toHaveText('100%', { timeout: 5000 });

    const transform = await page.locator('#content-area img.image-main').evaluate(
      (el) => getComputedStyle(el).transform,
    );
    expect(transform).not.toBe('none');

    // Double-clic = réinitialisation.
    await page.locator('#content-area .image-stage').dblclick();
    await expect(badge).toHaveText('100%');
  });

  test('navigue entre les images du dossier via la pellicule', async ({ page }) => {
    await login(page);
    await openFile(page, 'TestVault', 'sample-image.png');

    const strip = page.locator('#content-area .image-nav-strip');
    await expect(strip).toBeVisible({ timeout: 10000 });
    // sample-image.png et sample-vector.svg partagent le dossier racine.
    await expect(strip.locator('img.image-thumb')).toHaveCount(2);

    await page.locator('#content-area .image-nav-strip img.image-thumb').first().click();
    await expect(page.locator('#content-area .image-title')).toBeVisible();
  });

  test('conserve le plein écran et le panneau métadonnées à la navigation (#BUG-072)', async ({ page }) => {
    await login(page);
    await openFile(page, 'TestVault', 'sample-image.png');

    const container = page.locator('#content-area .image-viewer-container');
    const metaPanel = page.locator('#content-area .image-meta-panel');
    const title = page.locator('#content-area .image-title');
    await expect(container).toBeVisible({ timeout: 10000 });

    // Métadonnées : barre latérale à droite de l'image (pas sous la pellicule).
    await page.locator('#content-area .image-btn-metadata').click();
    await expect(metaPanel).toBeVisible();
    const stageBox = await page.locator('#content-area .image-stage').boundingBox();
    const metaBox = await metaPanel.boundingBox();
    expect(metaBox.x).toBeGreaterThanOrEqual(stageBox.x + stageBox.width - 1);

    // Plein écran activé.
    await page.locator('#content-area .image-btn-lightbox').click();
    await expect(container).toHaveClass(/lightbox/);

    // Naviguer (flèche droite) : les deux états doivent survivre au re-render.
    const titleBefore = await title.innerText();
    await page.keyboard.press('ArrowRight');
    await expect(container).toHaveClass(/lightbox/);
    await expect(metaPanel).toBeVisible();
    await expect(title).not.toHaveText(titleBefore);
  });

  test('navigation en place : flèches latérales, pellicule persistante et cadre ajusté (#111)', async ({ page }) => {
    await login(page);
    await openFile(page, 'TestVault', 'sample-image.png');

    const container = page.locator('#content-area .image-viewer-container');
    const strip = page.locator('#content-area .image-nav-strip');
    const main = page.locator('#content-area img.image-main');
    await expect(strip).toBeVisible({ timeout: 10000 });
    await expect(strip.locator('img.image-thumb')).toHaveCount(2);

    // Marqueur : la navigation en place ne doit PAS recréer le conteneur.
    await container.evaluate((el) => { el.dataset.inplace = '1'; });

    // L'image reste contenue dans le cadre (jamais plus grande).
    const stageBox = await page.locator('#content-area .image-stage').boundingBox();
    const imgBox = await main.boundingBox();
    expect(imgBox.width).toBeLessThanOrEqual(stageBox.width + 1);
    expect(imgBox.height).toBeLessThanOrEqual(stageBox.height + 1);

    // Flèche superposée révélée au survol.
    const nextArrow = page.locator('#content-area .image-nav-arrow-next');
    await expect(nextArrow).toBeAttached();
    await nextArrow.hover();
    await expect.poll(() => nextArrow.evaluate((el) => getComputedStyle(el).opacity)).toBe('1');

    const title = page.locator('#content-area .image-title');
    const before = await title.innerText();
    await nextArrow.click();

    await expect(title).not.toHaveText(before);
    await expect(strip).toBeVisible();
    await expect(strip.locator('img.image-thumb')).toHaveCount(2);
    await expect(container).toHaveAttribute('data-inplace', '1');
    await expect(page.locator('#content-area .image-counter')).toContainText('/');
  });

  test('la pellicule est défilable (molette + flèches latérales) sans changer d\'image (#112)', async ({ page }) => {
    await login(page);
    await openFile(page, 'TestVault', 'sample-image.png');

    const nav = page.locator('#content-area .image-nav');
    const strip = page.locator('#content-area .image-nav-strip');
    await expect(strip).toBeVisible({ timeout: 10000 });
    await expect(nav).toBeAttached();

    // Les deux flèches de défilement existent (translucides, révélées au survol).
    const prev = page.locator('#content-area .image-strip-arrow-prev');
    const next = page.locator('#content-area .image-strip-arrow-next');
    await expect(prev).toBeAttached();
    await expect(next).toBeAttached();
    await expect
      .poll(() => next.evaluate((el) => getComputedStyle(el).opacity))
      .not.toBe('1'); // au repos, la flèche n'est pas pleinement visible

    // Faire défiler la pellicule ne change PAS l'image courante.
    const title = page.locator('#content-area .image-title');
    const before = await title.innerText();
    await next.hover();
    await next.click();
    await prev.click();
    await expect(title).toHaveText(before);
  });
});