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

const routes = ['/fundus', '/sendungen', '/eingang', '/archiv', '/verwaltung', '/live'];
const viewports = [
	{ width: 390, height: 844, theme: 'light' },
	{ width: 390, height: 844, theme: 'dark' },
	{ width: 768, height: 900, theme: 'light' },
	{ width: 768, height: 900, theme: 'dark' },
	{ width: 1440, height: 1000, theme: 'dark' },
	{ width: 1440, height: 1000, theme: 'light' }
] as const;

async function expectNoHorizontalOverflow(page: Page) {
	const dimensions = await page.evaluate(() => ({
		scrollWidth: document.documentElement.scrollWidth,
		clientWidth: document.documentElement.clientWidth
	}));
	expect(dimensions.scrollWidth).toBeLessThanOrEqual(dimensions.clientWidth);
}

async function setTheme(page: Page, theme: 'light' | 'dark') {
	await page.evaluate((value) => localStorage.setItem('sendewerk-theme', value), theme);
}

test('desktop fundus is a compact, filterable list with persistent themes', async ({
	page
}, testInfo) => {
	await page.setViewportSize({ width: 1440, height: 1000 });
	await page.goto('/fundus');

	await expect(page.getByRole('heading', { name: 'Fundus', exact: true })).toBeVisible();
	await expect(page.locator('.sidebar')).toBeVisible();
	await expect(page.locator('.mobile-navigation')).toBeHidden();
	await expect(page.locator('.utility-navigation a')).toHaveText('Verwaltung');
	await expect(page.locator('.piece-card')).toHaveCount(4);

	const firstRow = await page.locator('.piece-card').nth(0).boundingBox();
	const secondRow = await page.locator('.piece-card').nth(1).boundingBox();
	expect(firstRow?.x).toBe(secondRow?.x);
	expect(firstRow?.y).toBeLessThan(secondRow?.y ?? 0);
	expect(firstRow?.height ?? 999).toBeLessThan(130);
	const searchBox = await page.locator('.search-field').boundingBox();
	const filtersBox = await page.locator('.filter-tabs').boundingBox();
	expect(searchBox?.height).toBe(filtersBox?.height);
	await expect(page.getByRole('button', { name: 'In Arbeit' })).toHaveCSS('white-space', 'nowrap');

	const notice = page.locator('.preview-notice');
	await expect(page.getByText('Vorschau · Fundus', { exact: true })).toBeVisible();
	await expect(notice.getByText('Diese Ansicht ist schreibgeschützt.')).toBeHidden();
	await notice.locator('summary').focus();
	await expect(notice.locator('summary')).toBeFocused();
	await page.keyboard.press('Enter');
	await expect(notice.getByText('Diese Ansicht ist schreibgeschützt.')).toBeVisible();

	await page.getByRole('searchbox', { name: 'Fundus durchsuchen' }).fill('Pixelart');
	await expect(page.locator('.piece-card')).toHaveCount(1);
	await page.getByRole('button', { name: 'In Arbeit' }).click();
	await expect(page.getByRole('heading', { name: 'Kein passendes Stück' })).toBeVisible();
	await page.getByRole('button', { name: 'Filter zurücksetzen' }).click();
	await expect(page.locator('.piece-card')).toHaveCount(4);

	await page.getByRole('button', { name: 'Darstellung: System' }).click();
	await expect(page.locator('html')).toHaveAttribute('data-theme-preference', 'light');
	await page.reload();
	await expect(page.locator('html')).toHaveAttribute('data-theme-preference', 'light');
	await expect(page.getByRole('button', { name: 'Darstellung: Hell' })).toBeVisible();
	await expectNoHorizontalOverflow(page);
	await page.screenshot({ path: testInfo.outputPath('fundus-desktop-light.png'), fullPage: true });
});

test('desktop builder keeps the fundus beside the wider run sheet', async ({ page }, testInfo) => {
	await page.setViewportSize({ width: 1280, height: 900 });
	await page.goto('/fundus');
	await setTheme(page, 'dark');
	await page.goto('/sendungen');

	await expect(page.locator('html')).toHaveAttribute('data-theme', 'dark');
	await expect(page.getByRole('heading', { name: 'Sendungen', exact: true })).toBeVisible();
	await expect(page.getByText('Herbstsendung: Kleine Welten', { exact: true })).toBeVisible();
	await expect(page.locator('.source-pane')).toBeVisible();
	await expect(page.locator('.run-pane')).toBeVisible();
	await expect(page.locator('.mobile-pane-switch')).toBeHidden();
	await expect(
		page.locator('.show-summary strong').filter({ hasText: '1 Std. 25 Min.' })
	).toBeVisible();

	const sourceBox = await page.locator('.source-pane').boundingBox();
	const runBox = await page.locator('.run-pane').boundingBox();
	expect(sourceBox?.x).toBeLessThan(runBox?.x ?? 0);
	expect(sourceBox?.width ?? 9999).toBeLessThan(runBox?.width ?? 0);
	await expectNoHorizontalOverflow(page);
	await page.screenshot({
		path: testInfo.outputPath('sendungen-desktop-dark.png'),
		fullPage: true
	});
});

test('narrow desktop retains the sidebar and switches the builder panes', async ({ page }) => {
	await page.setViewportSize({ width: 960, height: 850 });
	await page.goto('/sendungen');

	await expect(page.locator('.sidebar')).toBeVisible();
	await expect(page.locator('.mobile-navigation')).toBeHidden();
	await expect(page.locator('.mobile-pane-switch')).toBeVisible();
	await expect(page.locator('.run-pane')).toBeVisible();
	await expect(page.locator('.source-pane')).toBeHidden();
	await page.getByRole('button', { name: 'Fundus', exact: true }).click();
	await expect(page.locator('.source-pane')).toBeVisible();
	await expect(page.locator('.run-pane')).toBeHidden();
	await expectNoHorizontalOverflow(page);
});

test('mobile and tablet navigation do not obscure switchable content', async ({
	page
}, testInfo) => {
	for (const width of [390, 768]) {
		await page.setViewportSize({ width, height: 900 });
		await page.goto('/sendungen');

		await expect(page.locator('.sidebar')).toBeHidden();
		await expect(page.locator('.mobile-navigation')).toBeVisible();
		await expect(page.locator('.run-pane')).toBeVisible();
		await page.getByRole('button', { name: 'Fundus', exact: true }).click();
		await expect(page.locator('.source-pane')).toBeVisible();
		await expect(page.locator('.run-pane')).toBeHidden();
		await expectNoHorizontalOverflow(page);

		await page.evaluate(() => window.scrollTo(0, document.body.scrollHeight));
		const verticalSpace = await page.evaluate(() => {
			const navigation = document.querySelector('.mobile-navigation')?.getBoundingClientRect();
			const content = document.querySelector('.source-pane')?.getBoundingClientRect();
			return { contentBottom: content?.bottom ?? 0, navigationTop: navigation?.top ?? 0 };
		});
		expect(verticalSpace.contentBottom).toBeLessThanOrEqual(verticalSpace.navigationTop + 1);
	}

	await page.setViewportSize({ width: 390, height: 844 });
	await page.goto('/sendungen');
	await page.screenshot({ path: testInfo.outputPath('sendungen-mobile.png'), fullPage: true });
});

test('all work areas fit at required widths in light and dark mode', async ({ page }, testInfo) => {
	for (const viewport of viewports) {
		await page.setViewportSize({ width: viewport.width, height: viewport.height });
		await page.goto('/fundus');
		await setTheme(page, viewport.theme);

		for (const route of routes) {
			await page.goto(route);
			await expect(page.locator('html')).toHaveAttribute('data-theme', viewport.theme);
			await expectNoHorizontalOverflow(page);
		}
	}

	await page.setViewportSize({ width: 768, height: 900 });
	await page.goto('/fundus');
	await setTheme(page, 'dark');
	await page.goto('/verwaltung');
	await page.screenshot({
		path: testInfo.outputPath('verwaltung-tablet-dark.png'),
		fullPage: true
	});
});

test('long titles and longer fundus lists reflow without overflow', async ({ page }, testInfo) => {
	await page.setViewportSize({ width: 1280, height: 900 });
	await page.goto('/fundus');
	await expect(page.locator('.piece-card')).toHaveCount(4);
	await page.evaluate(() => {
		const list = document.querySelector('.piece-grid');
		const rows = Array.from(document.querySelectorAll('.piece-card'));
		const title = rows[0]?.querySelector('h2');
		if (title) {
			title.textContent =
				'Ein außergewöhnlich langer redaktioneller Titel über kleine Konsolen, große Ideen und unerwartete Wendungen';
		}
		for (let repetition = 0; repetition < 3; repetition += 1) {
			for (const row of rows) list?.append(row.cloneNode(true));
		}
	});

	await expect(page.locator('.piece-card')).toHaveCount(16);
	await expectNoHorizontalOverflow(page);
	await page.setViewportSize({ width: 390, height: 844 });
	await expectNoHorizontalOverflow(page);
	await expect(page.locator('.piece-card').first()).toHaveCSS('flex-direction', 'column');
	const mobileCard = await page.locator('.piece-card').first().boundingBox();
	const mobilePrimary = await page.locator('.piece-primary').first().boundingBox();
	expect(mobilePrimary?.width ?? 0).toBeGreaterThan((mobileCard?.width ?? 0) - 40);
	await expect(page.locator('.piece-card').first().getByRole('heading')).toContainText(
		'Ein außergewöhnlich langer redaktioneller Titel'
	);
	await page.screenshot({
		path: testInfo.outputPath('fundus-mobile-long-content.png'),
		fullPage: true
	});
});

test('empty states and administration stay concise', async ({ page }) => {
	for (const width of [390, 1280]) {
		await page.setViewportSize({ width, height: 900 });
		for (const route of ['/eingang', '/archiv']) {
			await page.goto(route);
			const emptyState = page.locator('.planned-panel');
			await expect(emptyState).toBeVisible();
			const box = await emptyState.boundingBox();
			expect(box?.height ?? 999).toBeLessThan(150);
			await expectNoHorizontalOverflow(page);
		}
	}

	await page.setViewportSize({ width: 1280, height: 900 });
	await page.goto('/verwaltung');
	const panels = page.locator('.taxonomy-panel');
	await expect(panels).toHaveCount(3);
	const boxes = await Promise.all([
		panels.nth(0).boundingBox(),
		panels.nth(1).boundingBox(),
		panels.nth(2).boundingBox()
	]);
	expect(boxes[0]?.y).toBe(boxes[1]?.y);
	expect(boxes[1]?.y).toBe(boxes[2]?.y);
});

test('live preview retains its existing readable controls', async ({ page }) => {
	await page.setViewportSize({ width: 1280, height: 900 });
	await page.goto('/live');

	await expect(page.getByText('Vorschau · Live-Modus', { exact: true })).toBeVisible();
	await expect(page.getByText('Eine Kurbel, ein gelber Knopf und sehr viel Charme')).toBeVisible();
	const before = await page
		.locator('.live-current')
		.evaluate((element) => getComputedStyle(element).getPropertyValue('--prompt-size'));
	await page.getByRole('button', { name: 'Schrift vergrößern' }).click();
	const after = await page
		.locator('.live-current')
		.evaluate((element) => getComputedStyle(element).getPropertyValue('--prompt-size'));
	expect(after).not.toBe(before);
	await page.getByText('Recherche öffnen').click();
	await expect(page.locator('.research-details')).toHaveAttribute('open', '');
	await expectNoHorizontalOverflow(page);
});