import { execFileSync } from 'node:child_process';
import { mkdtempSync, rmSync } from 'node:fs';
import { tmpdir } from 'node:os';
import path from 'node:path';
import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
import { closeDatabase, getDatabase } from './database.js';
import {
	discardFeedEntries,
	fetchDueFeeds,
	fetchFeed,
	importFeedEntries,
	listFeedEntries,
	saveFeedSource
} from './feeds.js';
import { getPiece } from './content.js';

vi.mock('node:dns/promises', () => ({
	lookup: vi.fn(async () => [{ address: '93.184.216.34', family: 4 }])
}));

const validFeed = `<?xml version="1.0"?><rss version="2.0"><channel><title>Test</title><item>
<guid>entry-1</guid><title>Ein Beitrag</title><link>https://example.org/post</link>
<description><![CDATA[<p>Kurz <strong>und</strong> gut.</p><script>evil()</script>]]></description>
<pubDate>Sat, 24 Oct 2026 12:00:00 GMT</pubDate></item></channel></rss>`;

let directory: string;

beforeEach(() => {
	directory = mkdtempSync(path.join(tmpdir(), 'sendewerk-feed-test-'));
	process.env.SENDEWERK_DB_PATH = path.join(directory, 'test.sqlite');
	process.env.SENDEWERK_UPLOAD_DIR = path.join(directory, 'uploads');
	execFileSync(process.execPath, ['scripts/migrate.mjs'], { cwd: process.cwd(), env: process.env });
	execFileSync(process.execPath, ['scripts/seed.mjs'], { cwd: process.cwd(), env: process.env });
});

afterEach(() => {
	vi.unstubAllGlobals();
	closeDatabase();
	delete process.env.SENDEWERK_DB_PATH;
	delete process.env.SENDEWERK_UPLOAD_DIR;
	rmSync(directory, { recursive: true, force: true });
});

describe('RSS import inbox', () => {
	it('keeps one entry across fetches and preserves a discard decision', async () => {
		vi.stubGlobal(
			'fetch',
			vi.fn(
				async () => new Response(validFeed, { headers: { 'content-type': 'application/rss+xml' } })
			)
		);
		const feedId = saveFeedSource(null, {
			name: 'Feed',
			url: 'https://example.org/feed.xml',
			isEnabled: true,
			refreshIntervalMinutes: 60,
			defaultCategoryId: null
		});
		await fetchFeed(feedId);
		const [entry] = listFeedEntries();
		expect(entry.title).toBe('Ein Beitrag');
		expect(discardFeedEntries([entry.id])).toBe(1);
		await fetchFeed(feedId);
		expect(listFeedEntries()).toHaveLength(0);
		expect(listFeedEntries('discarded')).toHaveLength(1);
	});

	it('sanitizes foreign HTML and retains the original source on explicit import', async () => {
		vi.stubGlobal(
			'fetch',
			vi.fn(async () => new Response(validFeed))
		);
		const feedId = saveFeedSource(null, {
			name: 'Feed',
			url: 'https://example.org/feed.xml',
			isEnabled: true,
			refreshIntervalMinutes: 60,
			defaultCategoryId: 'cat-jc'
		});
		await fetchFeed(feedId);
		const [entry] = listFeedEntries();
		const [pieceId] = importFeedEntries([entry.id], []);
		const piece = getPiece(pieceId)!;
		expect(piece.summary).toContain('Kurz und gut.');
		expect(piece.summary).not.toContain('<script>');
		expect(piece.sources).toEqual([
			{ label: 'RSS: Originalbeitrag', url: 'https://example.org/post', timecodeSeconds: null }
		]);
		expect(piece.categoryIds).toEqual(['cat-jc']);
	});

	it('isolates a broken feed while fetching other due feeds', async () => {
		vi.stubGlobal(
			'fetch',
			vi.fn(
				async (url: URL) => new Response(url.href.includes('broken') ? '<not-feed />' : validFeed)
			)
		);
		saveFeedSource(null, {
			name: 'A broken',
			url: 'https://example.org/broken.xml',
			isEnabled: true,
			refreshIntervalMinutes: 60,
			defaultCategoryId: null
		});
		saveFeedSource(null, {
			name: 'B valid',
			url: 'https://example.org/valid.xml',
			isEnabled: true,
			refreshIntervalMinutes: 60,
			defaultCategoryId: null
		});
		await fetchDueFeeds();
		expect(listFeedEntries()).toHaveLength(1);
		const errors = getDatabase()
			.prepare("SELECT count(*) AS count FROM feed_sources WHERE last_error <> ''")
			.get() as { count: number };
		expect(errors.count).toBe(1);
	});

	it('blocks loopback targets before sending a request', async () => {
		const request = vi.fn();
		vi.stubGlobal('fetch', request);
		const feedId = saveFeedSource(null, {
			name: 'Local',
			url: 'http://127.0.0.1/feed.xml',
			isEnabled: false,
			refreshIntervalMinutes: 60,
			defaultCategoryId: null
		});
		await expect(fetchFeed(feedId)).rejects.toThrow('FEED_BLOCKED');
		expect(request).not.toHaveBeenCalled();
	});
});