import { expect, test } from '@playwright/test';
import { unzipSync } from 'fflate';
import { readFile } from 'node:fs/promises';
import { createPdf, dropFiles, expectPdfDownload, pdfDropzone, trackPageErrors } from './helpers';

test('compress processes a single dropped file and offers its download per row', async ({
	page
}) => {
	const pageErrors = trackPageErrors(page);
	await page.goto('/tools/compress');
	await dropFiles(page, pdfDropzone(page), [
		{ name: 'gross.pdf', mimeType: 'application/pdf', buffer: await createPdf(2, 'Komprimieren') }
	]);

	await expect(page.getByText('Dateien (1)')).toBeVisible();
	await page.getByRole('button', { name: 'Komprimieren', exact: true }).click();
	await expect(page.getByText('Fertig ✓')).toBeVisible({ timeout: 20_000 });
	const downloadPromise = page.waitForEvent('download');
	await page.getByRole('button', { name: 'gross.pdf herunterladen' }).click();
	await expectPdfDownload(await downloadPromise, /^gross_komprimiert\.pdf$/);
	expect(pageErrors).toEqual([]);
});

test('compress appends further files and bundles all results in one ZIP', async ({ page }) => {
	const pageErrors = trackPageErrors(page);
	await page.goto('/tools/compress');
	await dropFiles(page, pdfDropzone(page), [
		{ name: 'eins.pdf', mimeType: 'application/pdf', buffer: await createPdf(1, 'Eins') }
	]);
	await dropFiles(page, pdfDropzone(page), [
		{ name: 'zwei.pdf', mimeType: 'application/pdf', buffer: await createPdf(2, 'Zwei') }
	]);

	await expect(page.getByText('Dateien (2)')).toBeVisible();
	await page.getByRole('button', { name: 'Komprimieren', exact: true }).click();
	await expect(page.getByText('Fertig ✓')).toHaveCount(2, { timeout: 30_000 });

	const downloadPromise = page.waitForEvent('download');
	await page.getByRole('button', { name: 'Alle herunterladen' }).click();
	const download = await downloadPromise;
	expect(download.suggestedFilename()).toMatch(/^komprimiert_\d{4}-\d{2}-\d{2}\.zip$/);
	const zipPath = await download.path();
	expect(zipPath).not.toBeNull();
	const entries = Object.keys(unzipSync(new Uint8Array(await readFile(zipPath!))));
	expect(entries.sort()).toEqual(['eins_komprimiert.pdf', 'zwei_komprimiert.pdf']);
	expect(pageErrors).toEqual([]);
});

test('compress batch keeps processing after a failing file and supports retry and removal', async ({
	page
}) => {
	const pageErrors = trackPageErrors(page);
	await page.goto('/tools/compress');
	await dropFiles(page, pdfDropzone(page), [
		{ name: 'gut.pdf', mimeType: 'application/pdf', buffer: await createPdf(1, 'Gut') },
		{
			name: 'kaputt.pdf',
			mimeType: 'application/pdf',
			buffer: Buffer.from('kein gueltiges PDF')
		}
	]);

	await page.getByRole('button', { name: 'Komprimieren', exact: true }).click();
	await expect(page.getByText('Fertig ✓')).toHaveCount(1, { timeout: 30_000 });
	await expect(page.getByText('Fehler')).toBeVisible();

	// Only one result exists, so the bulk ZIP action stays hidden.
	await expect(page.getByRole('button', { name: 'Alle herunterladen' })).toHaveCount(0);

	// Retrying the broken file fails again without disturbing the finished row.
	await page.getByRole('button', { name: 'kaputt.pdf erneut versuchen' }).click();
	await expect(page.getByText('Fertig ✓')).toHaveCount(1);
	await expect(page.getByText('Fehler')).toBeVisible();

	const downloadPromise = page.waitForEvent('download');
	await page.getByRole('button', { name: 'gut.pdf herunterladen' }).click();
	await expectPdfDownload(await downloadPromise, /^gut_komprimiert\.pdf$/);

	await page.getByRole('button', { name: 'kaputt.pdf entfernen' }).click();
	await expect(page.getByText('kaputt.pdf')).toHaveCount(0);
	await expect(page.getByRole('button', { name: 'gut.pdf herunterladen' })).toBeVisible();
	expect(pageErrors).toEqual([]);
});