import { describe, it, expect, beforeAll, afterAll } from 'bun:test';
import { Database } from 'bun:sqlite';
import { mkdtempSync, rmSync } from 'fs';
import { tmpdir } from 'os';
import { join } from 'path';
import { startWebServer } from './helpers/server';
import { initializeDatabase, ensureUserExists } from '../../src/db';

async function sha256Hex(input: string): Promise<string> {
	const enc = new TextEncoder().encode(input);
	const buf = await crypto.subtle.digest('SHA-256', enc);
	const bytes = new Uint8Array(buf);
	return Array.from(bytes)
		.map((b) => b.toString(16).padStart(2, '0'))
		.join('');
}

function toIsoSql(d = new Date()): string {
	return d.toISOString().replace('T', ' ').replace('Z', '');
}

describe('Web UI - /app/preferences', () => {
	const userId = '34600123456';
	let dbPath: string;
	let server: Awaited<ReturnType<typeof startWebServer>> | null = null;
	let tmpDir: string;

	beforeAll(async () => {
		tmpDir = mkdtempSync(join(tmpdir(), 'webtest-'));
		dbPath = join(tmpDir, 'tasks.db');

		// Inicializar DB en archivo (como en prod)
		const db = new Database(dbPath);
		initializeDatabase(db);
		ensureUserExists(userId, db);

		// Crear sesión válida
		const sid = 'sid-test-pref-ui';
		const hash = await sha256Hex(sid);
		const now = new Date();
		const nowIso = toIsoSql(now);
		const expIso = toIsoSql(new Date(now.getTime() + 60 * 60 * 1000)); // +1h

		db.prepare(`
			INSERT INTO web_sessions (session_hash, user_id, created_at, last_seen_at, expires_at)
			VALUES (?, ?, ?, ?, ?)
		`).run(hash, userId, nowIso, nowIso, expIso);
		db.close();

		// Arrancar web apuntando a este DB
		server = await startWebServer({
			port: 19110,
			env: { DB_PATH: dbPath, TZ: 'UTC' }
		});
	});

	afterAll(async () => {
		try { await server?.stop(); } catch {}
		try { rmSync(tmpDir, { recursive: true, force: true }); } catch {}
	});

	it('renderiza el formulario con valores por defecto y muestra próximo recordatorio', async () => {
		const sid = 'sid-test-pref-ui';
		const res = await fetch(`${server!.baseUrl}/app/preferences`, {
			headers: { Cookie: `sid=${sid}` }
		});
		expect(res.status).toBe(200);
		const html = await res.text();

		expect(html).toContain('Preferencias de recordatorios');
		// select de frecuencia y opción 'off' presente
		expect(html).toContain('<option value="off">Apagado</option>');
		// input type="time" con valor por defecto
		expect(html).toContain('type="time"');
		expect(html).toContain('08:30');
		// bloque de "Próximo recordatorio"
		expect(html).toContain('Próximo recordatorio');
	});
});