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

// Phase 4: the reader gains a mobile chrome — invisible tap zones for
// prev/next/toggle, a chapter-jump bottom sheet, a reader-settings
// sheet (mode + gap + brightness), a fixed bottom page scrubber, a
// brightness overlay driven by a CSS variable, and an idle-timer
// auto-hide for the chrome after 3s of inactivity. Desktop chrome is
// preserved above 640px.

const MOBILE = { width: 390, height: 844 } as const;
const DESKTOP = { width: 1280, height: 720 } as const;

const mangaId = 'a9999999-9999-9999-9999-999999999999';
const chapterAId = 'c9999999-9999-9999-9999-999999999999';
const chapterBId = 'c8888888-8888-8888-8888-888888888888';

const mangaFixture = {
    id: mangaId,
    title: 'Berserk',
    status: 'ongoing',
    alt_titles: [],
    description: null,
    cover_image_path: `mangas/${mangaId}/cover.png`,
    created_at: '2026-01-01T00:00:00Z',
    updated_at: '2026-01-01T00:00:00Z',
    authors: [{ id: 'au1', name: 'Kentaro Miura' }],
    genres: [],
    tags: []
};

const chaptersFixture = [
    {
        id: chapterAId,
        manga_id: mangaId,
        number: 1,
        title: 'The Brand',
        page_count: 3,
        created_at: '2026-01-01T00:00:00Z'
    },
    {
        id: chapterBId,
        manga_id: mangaId,
        number: 2,
        title: 'Second',
        page_count: 3,
        created_at: '2026-02-01T00:00:00Z'
    }
];

const pagesFixture = [
    {
        id: 'p11111111-1111-1111-1111-111111111111',
        chapter_id: chapterAId,
        page_number: 1,
        storage_key: `mangas/${mangaId}/chapters/${chapterAId}/pages/0001.png`,
        content_type: 'image/png'
    },
    {
        id: 'p22222222-1111-1111-1111-111111111111',
        chapter_id: chapterAId,
        page_number: 2,
        storage_key: `mangas/${mangaId}/chapters/${chapterAId}/pages/0002.png`,
        content_type: 'image/png'
    },
    {
        id: 'p33333333-1111-1111-1111-111111111111',
        chapter_id: chapterAId,
        page_number: 3,
        storage_key: `mangas/${mangaId}/chapters/${chapterAId}/pages/0003.png`,
        content_type: 'image/png'
    }
];

async function mockReader(page: Page) {
    await page.route('**/api/v1/auth/config', (route) =>
        route.fulfill({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify({ self_register_enabled: true, private_mode: false })
        })
    );
    await page.route('**/api/v1/auth/me', (route) =>
        route.fulfill({
            status: 401,
            contentType: 'application/json',
            body: JSON.stringify({
                error: { code: 'unauthenticated', message: 'unauthenticated' }
            })
        })
    );
    await page.route('**/api/v1/auth/me/preferences', (route) =>
        route.fulfill({ status: 401, contentType: 'application/json', body: '{}' })
    );
    await page.route('**/api/v1/me/bookmarks*', (route) =>
        route.fulfill({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify({ items: [], page: { limit: 50, offset: 0, total: 0 } })
        })
    );
    await page.route(`**/api/v1/mangas/${mangaId}`, (route) =>
        route.fulfill({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify(mangaFixture)
        })
    );
    // Pages endpoint must come before the single-chapter handler
    // because Playwright matches more recently-registered routes
    // first — registering pages last keeps it on top.
    await page.route(`**/api/v1/mangas/${mangaId}/chapters`, (route) =>
        route.fulfill({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify({
                items: chaptersFixture,
                page: { limit: 50, offset: 0, total: chaptersFixture.length }
            })
        })
    );
    await page.route(`**/api/v1/mangas/${mangaId}/chapters\\?*`, (route) =>
        route.fulfill({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify({
                items: chaptersFixture,
                page: { limit: 50, offset: 0, total: chaptersFixture.length }
            })
        })
    );
    await page.route(`**/api/v1/mangas/${mangaId}/chapters/${chapterAId}`, (route) =>
        route.fulfill({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify(chaptersFixture[0])
        })
    );
    await page.route(`**/api/v1/mangas/${mangaId}/chapters/${chapterBId}`, (route) =>
        route.fulfill({
            status: 200,
            contentType: 'application/json',
            body: JSON.stringify(chaptersFixture[1])
        })
    );
    await page.route(
        `**/api/v1/mangas/${mangaId}/chapters/${chapterAId}/pages`,
        (route) =>
            route.fulfill({
                status: 200,
                contentType: 'application/json',
                body: JSON.stringify({ pages: pagesFixture })
            })
    );
    await page.route(
        `**/api/v1/mangas/${mangaId}/chapters/${chapterBId}/pages`,
        (route) =>
            route.fulfill({
                status: 200,
                contentType: 'application/json',
                body: JSON.stringify({ pages: pagesFixture })
            })
    );
    await page.route(`**/api/v1/me/read-progress/${mangaId}`, (route) =>
        route.fulfill({
            status: 404,
            contentType: 'application/json',
            body: JSON.stringify({ error: { code: 'not_found', message: 'not found' } })
        })
    );
    const png = Buffer.from(
        '89504e470d0a1a0a0000000d49484452000000010000000108060000001f15c4890000000d49444154789c63000100000005000158a3b62a0000000049454e44ae426082',
        'hex'
    );
    await page.route('**/api/v1/files/**', (route) =>
        route.fulfill({ status: 200, contentType: 'image/png', body: png })
    );
}

test.describe('mobile reader', () => {
    test('phone viewport: tap right advances a page, tap left goes back', async ({
        page
    }) => {
        await mockReader(page);
        await page.setViewportSize(MOBILE);
        await page.goto(`/manga/${mangaId}/chapter/${chapterAId}`);

        await expect(page.getByTestId('page-indicator')).toHaveText('Page 1 / 3');

        await page.getByTestId('reader-tap-right').click();
        await expect(page.getByTestId('page-indicator')).toHaveText('Page 2 / 3');

        await page.getByTestId('reader-tap-left').click();
        await expect(page.getByTestId('page-indicator')).toHaveText('Page 1 / 3');
    });

    test('phone viewport: tap center toggles focus mode (chrome slides off)', async ({
        page
    }) => {
        await mockReader(page);
        await page.setViewportSize(MOBILE);
        await page.goto(`/manga/${mangaId}/chapter/${chapterAId}`);

        const html = page.locator('html');
        await expect(html).not.toHaveAttribute('data-reader-fullscreen', 'true');

        await page.getByTestId('reader-tap-center').click();
        await expect(html).toHaveAttribute('data-reader-fullscreen', 'true');

        await page.getByTestId('reader-tap-center').click();
        await expect(html).not.toHaveAttribute('data-reader-fullscreen', 'true');
    });

    test('phone viewport: chrome auto-hides after 3s of inactivity in single mode', async ({
        page
    }) => {
        await mockReader(page);
        await page.setViewportSize(MOBILE);
        await page.goto(`/manga/${mangaId}/chapter/${chapterAId}`);

        const html = page.locator('html');
        // Default state: chrome visible.
        await expect(html).not.toHaveAttribute('data-reader-fullscreen', 'true');
        // After 3s of idle the timer flips the fullscreen flag (the
        // existing focus-mode CSS does the slide-off).
        await expect(html).toHaveAttribute('data-reader-fullscreen', 'true', {
            timeout: 6000
        });
    });

    test('phone viewport: chapter-jump button opens the sheet and lists all chapters', async ({
        page
    }) => {
        await mockReader(page);
        await page.setViewportSize(MOBILE);
        await page.goto(`/manga/${mangaId}/chapter/${chapterAId}`);

        await expect(page.getByTestId('chapter-jump-sheet')).toBeHidden();
        await page.getByTestId('reader-chapter-jump').click();

        const sheet = page.getByTestId('chapter-jump-sheet');
        await expect(sheet).toBeVisible();
        await expect(sheet.getByTestId(`chapter-jump-${chapterAId}`)).toBeVisible();
        await expect(sheet.getByTestId(`chapter-jump-${chapterBId}`)).toBeVisible();
    });

    test('phone viewport: settings sheet swaps mode to Continuous and the continuous container appears', async ({
        page
    }) => {
        await mockReader(page);
        await page.setViewportSize(MOBILE);
        await page.goto(`/manga/${mangaId}/chapter/${chapterAId}`);

        await page.getByTestId('reader-settings-btn').click();
        await expect(page.getByTestId('reader-settings-sheet')).toBeVisible();

        await page
            .getByTestId('reader-settings-sheet')
            .getByRole('radio', { name: 'Continuous' })
            .click();

        await expect(page.getByTestId('reader-continuous')).toBeVisible();
    });

    test('phone viewport: brightness slider drives the --reader-dim CSS variable', async ({
        page
    }) => {
        await mockReader(page);
        await page.setViewportSize(MOBILE);
        await page.goto(`/manga/${mangaId}/chapter/${chapterAId}`);

        await page.getByTestId('reader-settings-btn').click();

        // Drive the slider via fill — Playwright's fill on a range
        // input sets value and dispatches input events.
        await page.getByTestId('settings-brightness').fill('0.5');

        const dim = await page.evaluate(() =>
            getComputedStyle(document.documentElement).getPropertyValue('--reader-dim').trim()
        );
        // brightness 0.5 → dim = (1 - 0.5) * 0.7 = 0.35
        expect(Number.parseFloat(dim)).toBeCloseTo(0.35, 2);
    });

    test('desktop viewport: tap zones hidden, chapter select visible, settings button hidden', async ({
        page
    }) => {
        await mockReader(page);
        await page.setViewportSize(DESKTOP);
        await page.goto(`/manga/${mangaId}/chapter/${chapterAId}`);

        await expect(page.getByTestId('reader-tap')).toHaveCount(0);
        await expect(page.getByTestId('reader-chapter-select')).toBeVisible();
        await expect(page.getByTestId('reader-settings-btn')).toBeHidden();
    });
});