import { test, expect } from '@playwright/test';
import path from 'path';
import { fileURLToPath } from 'url';
import fs from 'fs';
import { login } from './helpers/auth';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const PDF_FIXTURE = path.resolve(__dirname, 'fixtures/minimal.pdf');

/**
 * E2E for issue #697 — read-only users can read an existing transcription.
 *
 * Setup runs as admin (default storage state): a PDF document with one
 * transcription block, so hasTranscription is true. The assertions run in a
 * fresh context logged in as the seeded READ_ALL-only "reader": they can open
 * the read view but see no edit tab and no per-block edit controls, and the
 * panel cannot be switched to edit.
 */

let docId: string;
let docHref: string;

test.describe.configure({ mode: 'serial' });

test.describe('Read-only user reads an existing transcription', () => {
	test.beforeAll(async ({ request }) => {
		const baseURL = process.env.E2E_BASE_URL ?? 'http://localhost:3000';
		const uniqueSuffix = Date.now();

		const docRes = await request.post('/api/documents', {
			multipart: {
				title: `E2E Read-only Transcription ${uniqueSuffix}`,
				documentDate: '1945-05-08'
			}
		});
		if (!docRes.ok()) throw new Error(`Create document failed: ${docRes.status()}`);
		docId = (await docRes.json()).id;
		docHref = `${baseURL}/documents/${docId}`;

		await request.put(`/api/documents/${docId}`, {
			multipart: {
				title: `E2E Read-only Transcription ${uniqueSuffix}`,
				documentDate: '1945-05-08',
				file: {
					name: 'minimal.pdf',
					mimeType: 'application/pdf',
					buffer: fs.readFileSync(PDF_FIXTURE)
				}
			}
		});

		const annRes = await request.post(`/api/documents/${docId}/annotations`, {
			data: { pageNumber: 1, x: 0.1, y: 0.1, width: 0.5, height: 0.1, color: '#00C7B1' }
		});
		if (!annRes.ok()) throw new Error(`Create annotation failed: ${annRes.status()}`);

		const blockRes = await request.post(`/api/documents/${docId}/transcription-blocks`, {
			data: {
				pageNumber: 1,
				x: 0.1,
				y: 0.1,
				width: 0.5,
				height: 0.1,
				text: 'Liebe Mutter, viele Grüße vom Mai 1945',
				label: null
			}
		});
		if (!blockRes.ok()) throw new Error(`Create block failed: ${blockRes.status()}`);
	});

	test.afterAll(async ({ request }) => {
		if (docId) await request.delete(`/api/documents/${docId}`);
	});

	test('reader opens the read view with no edit tab or edit controls', async ({ browser }) => {
		const context = await browser.newContext({ storageState: { cookies: [], origins: [] } });
		const page = await context.newPage();
		try {
			await login(page, 'reader', 'reader123');
			await page.goto(docHref);

			// Reader entry control is the read label, not "Transkribieren".
			const readButton = page.getByRole('button', { name: /Transkription lesen/i });
			await expect(readButton).toBeVisible({ timeout: 5000 });
			await readButton.click();

			// Read view shows the transcription text.
			await expect(page.getByText(/Mai 1945/)).toBeVisible({ timeout: 5000 });

			// Header is a plain "Transkription" label, not a Lesen/Bearbeiten toggle.
			await expect(page.getByRole('heading', { name: /^Transkription$/i })).toBeVisible();
			await expect(page.getByTestId('mode-edit')).toHaveCount(0);
			await expect(page.getByTestId('mode-read')).toHaveCount(0);
		} finally {
			await context.close();
		}
	});
});