import { test, expect } from '@playwright/test';
import AxeBuilder from '@axe-core/playwright';

function buildAxe(page: Parameters<typeof AxeBuilder>[0]['page']) {
	return new AxeBuilder({ page }).withTags(['wcag2a', 'wcag2aa']);
}

test.describe('Korrespondenz – empty state', () => {
	test('shows the search heading when no person is selected', async ({ page }) => {
		await page.goto('/korrespondenz');
		await expect(page.getByText(/Korrespondenz durchsuchen/i)).toBeVisible();
		const a11y = await buildAxe(page).analyze();
		expect(a11y.violations, JSON.stringify(a11y.violations, null, 2)).toHaveLength(0);
		await page.screenshot({ path: 'test-results/e2e/korrespondenz-empty.png' });
	});

	test('nav link goes to /korrespondenz', async ({ page }) => {
		await page.goto('/');
		// Click the nav link (desktop text or mobile icon)
		const navLink = page.getByRole('link', { name: /Korrespondenz/i }).first();
		await navLink.click();
		await expect(page).toHaveURL(/\/korrespondenz/);
	});
});

test.describe('Korrespondenz – single-person mode', () => {
	test('shows hint bar and documents when navigated with senderId', async ({ page }) => {
		// Get a real person ID from the persons list
		await page.goto('/persons');
		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
		await firstPersonLink.click();
		await page.waitForURL(/\/persons\/.+/);

		// Extract the person ID from the URL
		const personId = page.url().split('/persons/')[1].split('?')[0];

		// Navigate to korrespondenz in single-person mode
		await page.goto(`/korrespondenz?senderId=${personId}`);

		// Hint bar should be visible
		await expect(page.getByText(/Alle Briefe von/i)).toBeVisible();

		// Filter controls should be active (not dimmed)
		const filterStrip = page.locator('[aria-disabled="false"]').first();
		await expect(filterStrip).toBeAttached();

		const a11y = await buildAxe(page).analyze();
		expect(a11y.violations, JSON.stringify(a11y.violations, null, 2)).toHaveLength(0);
		await page.screenshot({ path: 'test-results/e2e/korrespondenz-single-person.png' });
	});

	test('sort toggle changes URL direction param', async ({ page }) => {
		await page.goto('/persons');
		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
		await firstPersonLink.click();
		await page.waitForURL(/\/persons\/.+/);
		const personId = page.url().split('/persons/')[1].split('?')[0];

		await page.goto(`/korrespondenz?senderId=${personId}&dir=DESC`);
		await page.getByTestId('conv-sort-btn').click();

		await expect(page).toHaveURL(/dir=ASC/);
		await page.screenshot({ path: 'test-results/e2e/korrespondenz-sort-asc.png' });
	});
});

test.describe('Korrespondenz – bilateral mode', () => {
	test('shows asymmetry bar when both persons have shared documents', async ({ page }) => {
		// Navigate to a person then follow a co-correspondent suggestion if available
		await page.goto('/persons');
		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
		await firstPersonLink.click();
		await page.waitForURL(/\/persons\/.+/);
		const senderId = page.url().split('/persons/')[1].split('?')[0];

		// Try to find a co-correspondent link from the person detail page
		const corrLink = page
			.locator('a[href*="/korrespondenz?senderId="][href*="receiverId="]')
			.first();
		if (await corrLink.isVisible({ timeout: 2000 }).catch(() => false)) {
			await corrLink.click();
			await page.waitForURL(/\/korrespondenz\?.*receiverId=/);

			// Hint bar should NOT be shown in bilateral mode
			await expect(page.getByText(/Alle Briefe von/i)).not.toBeVisible();

			const a11y = await buildAxe(page).analyze();
			expect(a11y.violations, JSON.stringify(a11y.violations, null, 2)).toHaveLength(0);
			await page.screenshot({ path: 'test-results/e2e/korrespondenz-bilateral.png' });
		} else {
			// E2E seed must include bilateral correspondents — a missing link is a test failure.
			throw new Error(
				`No bilateral correspondent links found for person ${senderId}. Ensure the E2E seed contains at least one bilateral correspondence pair.`
			);
		}
	});

	test('swap button swaps sender and receiver in URL', async ({ page }) => {
		await page.goto('/persons');
		const firstPersonLink = page.locator('a[href^="/persons/"]').first();
		await firstPersonLink.click();
		await page.waitForURL(/\/persons\/.+/);
		const senderId = page.url().split('/persons/')[1].split('?')[0];

		const corrLink = page
			.locator('a[href*="/korrespondenz?senderId="][href*="receiverId="]')
			.first();
		if (await corrLink.isVisible({ timeout: 2000 }).catch(() => false)) {
			const href = await corrLink.getAttribute('href');
			await corrLink.click();
			await page.waitForURL(/\/korrespondenz\?.*receiverId=/);

			// Extract original receiverId from the href
			const url = new URL(href!, 'http://x');
			const originalReceiverId = url.searchParams.get('receiverId')!;

			// Click swap
			await page.getByTestId('conv-swap-btn').click();

			// After swap the former receiver is now senderId
			await expect(page).toHaveURL(new RegExp(`senderId=${originalReceiverId}`));
			await page.screenshot({ path: 'test-results/e2e/korrespondenz-swapped.png' });
		} else {
			test.skip(true, `No bilateral correspondent links found for person ${senderId}`);
		}
	});
});