import { expect, test } from '@playwright/test';
import { PDFDocument } from 'pdf-lib';
import {
	createPdf,
	createPreRotatedPdf,
	dropFiles,
	expectPdfDownload,
	pdfDropzone,
	trackPageErrors
} from './helpers';

test('rotate turns pages losslessly via /Rotate and reset clears deltas', async ({ page }) => {
	const pageErrors = trackPageErrors(page);
	await page.goto('/tools/rotate');
	await dropFiles(page, pdfDropzone(page), [
		{ name: 'drehung.pdf', mimeType: 'application/pdf', buffer: await createPdf(3, 'Drehen') }
	]);

	const downloadButton = page.getByRole('button', { name: 'Drehen & herunterladen' });
	await expect(page.getByRole('button', { name: 'Seite 2 um 90° nach rechts drehen' })).toBeVisible(
		{
			timeout: 15_000
		}
	);
	await expect(downloadButton).toBeDisabled();

	const rotateRightPage2 = page.getByRole('button', { name: 'Seite 2 um 90° nach rechts drehen' });
	await rotateRightPage2.click();
	await rotateRightPage2.click();
	await expect(page.getByText('1 von 3 Seiten gedreht')).toBeVisible();
	await expect(page.getByText('180°', { exact: true })).toBeVisible();

	const downloadPromise = page.waitForEvent('download');
	await downloadButton.click();
	const bytes = await expectPdfDownload(await downloadPromise, /^drehung_gedreht\.pdf$/);
	const output = await PDFDocument.load(bytes);
	expect(output.getPage(1).getRotation().angle).toBe(180);
	expect(output.getPage(0).getRotation().angle).toBe(0);

	await page.getByRole('button', { name: 'Zurücksetzen' }).click();
	await expect(page.getByText('0 von 3 Seiten gedreht')).toBeVisible();
	await expect(downloadButton).toBeDisabled();
	expect(pageErrors).toEqual([]);
});

test('rotate adds the delta on top of an existing /Rotate value', async ({ page }) => {
	const pageErrors = trackPageErrors(page);
	await page.goto('/tools/rotate');
	await dropFiles(page, pdfDropzone(page), [
		{
			name: 'vorgedreht.pdf',
			mimeType: 'application/pdf',
			buffer: await createPreRotatedPdf(2, 'Vorgedreht')
		}
	]);

	await expect(page.getByRole('button', { name: 'Seite 1 um 90° nach rechts drehen' })).toBeVisible(
		{
			timeout: 15_000
		}
	);
	await page.getByRole('button', { name: 'Seite 1 um 90° nach rechts drehen' }).click();
	await expect(page.getByText('1 von 2 Seiten gedreht')).toBeVisible();

	const downloadPromise = page.waitForEvent('download');
	await page.getByRole('button', { name: 'Drehen & herunterladen' }).click();
	const bytes = await expectPdfDownload(await downloadPromise, /^vorgedreht_gedreht\.pdf$/);
	const output = await PDFDocument.load(bytes);
	expect(output.getPage(0).getRotation().angle).toBe(180);
	expect(output.getPage(1).getRotation().angle).toBe(0);
	expect(pageErrors).toEqual([]);
});