// @ts-check
// Tests: S1–S9 — story mode rendering and navigation
// Requires demo data: run `make demo-load` before this suite.
const { test, expect } = require('@playwright/test');

const TRIP_URL       = '/trips/italy-2026-demo';                                  // stories now surface in the trip feed
const STORY_GALLERY  = '/trips/italy-2026-demo/stories/val-dorcia-at-dawn';       // gallery-led: snap-gallery × 2, chapter-break, text-only pull-quote
const STORY_SCROLLY  = '/trips/italy-2026-demo/stories/sorano-rock-and-time';     // scrolly-led: scrolly-section × 2, chapter-break, pull-quote with image
const DEMO_STORY     = '/trips/italy-2026-demo/stories/val-dorcia-at-dawn';       // used for cross-trip hero sanity check

// ── S1: Trip feed shows story cards ──────────────────────────────────────────
test('S1: trip feed renders at least 3 story cards', async ({ page }) => {
    await page.goto(TRIP_URL);
    const cards = page.locator('[data-type="story"]');
    await expect(cards.first()).toBeVisible({ timeout: 5000 });
    const count = await cards.count();
    expect(count, 'At least 3 story cards').toBeGreaterThanOrEqual(3);
});

// ── S2: Gallery-led story — hero image + snap-gallery + chapter-break + text-only pull-quote ──
test('S2: gallery-led story renders hero, snap-gallery, chapter-break, text-only pull-quote', async ({ page }) => {
    await page.goto(STORY_GALLERY);
    // Hero: real image rendered, no placeholder
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });
    await expect(page.locator('.story-hero__img-placeholder')).toHaveCount(0);
    // Snap-gallery (there are two in this story)
    const galleries = page.locator('.pgallery');
    await expect(galleries.first()).toBeVisible();
    expect(await galleries.count(), 'Two snap-galleries').toBe(2);
    // Chapter-break
    await expect(page.locator('.chapter-break')).toBeVisible();
    // Text-only pull-quote (no background image variant)
    await expect(page.locator('.pull-quote__inner--no-image')).toBeVisible();
});

// ── S3: Scrolly-led story — two scrolly-sections + pull-quote with image ─────
test('S3: scrolly-led story renders two scrolly-sections and pull-quote with background image', async ({ page }) => {
    await page.goto(STORY_SCROLLY);
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });
    // Two scrolly-sections
    const scrollySections = page.locator('.scrolly');
    await expect(scrollySections.first()).toBeVisible();
    expect(await scrollySections.count(), 'Two scrolly-sections').toBe(2);
    // Pull-quote with background image
    await expect(page.locator('.pull-quote__bg')).toBeVisible();
});

// ── S4: Scrolly story loads without JS errors (Scrollama CDN) ────────────────
test('S4: scrolly story page loads without JS errors', async ({ page }) => {
    const errors = [];
    page.on('pageerror', e => errors.push(e.message));
    await page.goto(STORY_SCROLLY);
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });
    await page.waitForTimeout(1000);
    expect(errors, 'No JS errors on story page').toHaveLength(0);
});

// ── S5: Back button returns to the originating trip page ─────────────────────
test('S5: story back button navigates back to the trip page', async ({ page }) => {
    // Establish history: trip page → story → back
    await page.goto(TRIP_URL);
    await page.locator('[data-type="story"]').first().click();
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });
    await page.locator('.story-escape').click();
    // story-escape runs history.back() when history exists → back to the trip page
    await expect(page).toHaveURL(/\/trips\/italy-2026-demo$/);
    await expect(page.locator('.journal-post').first()).toBeVisible();
});

// ── S6: Demo story — hero image sanity check ─────────────────────────────────
test('S6: demo story renders hero image without placeholder', async ({ page }) => {
    await page.goto(DEMO_STORY);
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });
    await expect(page.locator('.story-hero__img-placeholder')).toHaveCount(0);
});

// ── S7: Story body back link is styled as a back-pill ────────────────────────
test('S7: story body back link has back-pill class', async ({ page }) => {
    await page.goto('/trips/italy-2026-demo/stories/val-dorcia-at-dawn');
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });
    // Scroll past the hero to reveal the story body
    await page.evaluate(() => window.scrollBy(0, window.innerHeight * 1.5));
    await page.waitForTimeout(300);
    const bodyBack = page.locator('.story-footer .back-pill');
    await expect(bodyBack).toBeAttached();
    await expect(bodyBack).toHaveText(/← Back/);
});

// ── S8: Scrolly-section text panels actually render beside the pinned image ───
// The server ships the panel text inside .scrolly__steps-content, which CSS hides
// (style.css: `display: none`). Only the inline Scrollama block in story.html.twig
// splits it into visible .scrolly-step divs — and it early-returns silently if the
// main.js bundle (which sets window.scrollama) hasn't executed yet. S3 asserted the
// image column exists; nothing asserted the text column was non-empty.
test('S8: scrolly-section builds visible step panels from its slot content', async ({ page }) => {
    await page.goto(STORY_SCROLLY);
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });

    // The bundle must have published scrollama before the inline block ran
    expect(
        await page.evaluate(() => typeof window.scrollama !== 'undefined'),
        'window.scrollama published by main.js bundle'
    ).toBe(true);

    // Every scrolly-section must have produced at least one step
    const sections = page.locator('.scrolly');
    const sectionCount = await sections.count();
    expect(sectionCount, 'Two scrolly-sections').toBe(2);

    for (let i = 0; i < sectionCount; i++) {
        const section = sections.nth(i);
        const steps = section.locator('.scrolly-step');
        expect(
            await steps.count(),
            `scrolly-section ${i} split its slot content into steps`
        ).toBeGreaterThan(0);
    }

    // …and the text must be readable, not left hidden in the raw slot.
    // Scroll each step into view so its reveal transition completes.
    const firstStep = page.locator('.scrolly').first().locator('.scrolly-step').first();
    await firstStep.scrollIntoViewIfNeeded();
    await page.waitForTimeout(800);
    await expect(firstStep.locator('.scrolly-step__inner')).toBeVisible();
    const text = (await firstStep.innerText()).trim();
    expect(text.length, 'First step panel renders non-empty text').toBeGreaterThan(20);
});

// ── S9: Back-to-top is wired once, by main.js, and pushes a history entry ─────
// The inline duplicate in story.html.twig was removed; initBackToTop() in
// js/src/main.js now solely owns #story-totop. That makes the button depend on
// the bundle having loaded, so assert the observable behaviour end to end.
test('S9: story back-to-top reveals on scroll, returns to top, and pushes history', async ({ page }) => {
    await page.goto(STORY_SCROLLY);
    await expect(page.locator('.story-hero__img')).toBeVisible({ timeout: 8000 });

    const btn = page.locator('#story-totop');
    await expect(btn).toBeAttached();

    // Hidden until scrolled past the 0.8 * viewport threshold
    await expect(btn).not.toHaveClass(/is-visible/);

    const historyBefore = await page.evaluate(() => history.length);

    await page.evaluate(() => window.scrollTo(0, window.innerHeight * 2));
    await expect(btn).toHaveClass(/is-visible/, { timeout: 3000 });

    await btn.click();
    await expect
        .poll(() => page.evaluate(() => window.scrollY), { timeout: 3000 })
        .toBeLessThan(10);

    // main.js's variant pushes a history entry; the removed inline copy did not
    expect(
        await page.evaluate(() => history.length),
        'Back-to-top pushed a history entry'
    ).toBeGreaterThan(historyBefore);
});