import test from 'node:test';
import assert from 'node:assert/strict';
import Fastify from 'fastify';
import cookie from '@fastify/cookie';
import rateLimit from '@fastify/rate-limit';
import api from '../src/api.js';

function makeApp(user, targetUser) {
  const calls = [];
  const pool = {
    async query(sql, params = []) {
      calls.push({ sql, params });
      if (sql.includes('FROM sessions s JOIN users u')) return { rows: [user] };
      if (sql.includes('FROM user_roles')) return { rows: [] };
      if (sql.startsWith('UPDATE schools SET name')) return { rows: [{ id: params[1], name: params[0] }] };
      if (sql.startsWith('SELECT * FROM classes WHERE id')) return { rows: [{ id: 100, school_id: 2, name: 'Groep 4' }] };
      if (sql.startsWith('SELECT * FROM users WHERE id') && targetUser) return { rows: [targetUser] };
      return { rows: [] };
    },
  };
  return (async () => {
    const app = Fastify({ trustProxy: 2 });
    await app.register(cookie);
    await app.register(rateLimit, { global: false });
    app.decorate('pg', pool);
    await app.register(api, { prefix: '/api' });
    await app.ready();
    return { app, calls };
  })();
}

const cookies = { teach_session: 'x'.repeat(64) };
const superUser = { id: 1, username: 'sm', role: 'super', school_id: null, class_id: null, data: {}, data_rev: 0 };
const admin = { id: 3, username: 'beheer', role: 'admin', school_id: 2, class_id: null, data: {}, data_rev: 0 };

test('systeemmanager kan een school hernoemen', async () => {
  const { app, calls } = await makeApp(superUser);
  const res = await app.inject({ method: 'PATCH', url: '/api/admin/schools/5', cookies,
    payload: { name: 'De Nieuwe Naam' } });
  assert.equal(res.statusCode, 200, res.body);
  assert.equal(res.json().school.name, 'De Nieuwe Naam');
  const upd = calls.find((c) => c.sql.startsWith('UPDATE schools SET name'));
  assert.deepEqual(upd.params, ['De Nieuwe Naam', '5']);
  await app.close();
});

test('schoolbeheerder mag geen scholen hernoemen', async () => {
  const { app } = await makeApp(admin);
  const res = await app.inject({ method: 'PATCH', url: '/api/admin/schools/5', cookies,
    payload: { name: 'Hack' } });
  assert.equal(res.statusCode, 403);
  await app.close();
});

test('schoolbeheerder en systeemmanager kunnen aan een klas gekoppeld worden', async () => {
  // schoolbeheerder van dezelfde school
  const { app, calls } = await makeApp(superUser, { id: 3, role: 'admin', school_id: 2 });
  const res = await app.inject({ method: 'POST', url: '/api/admin/classes/100/teachers', cookies,
    payload: { userId: 3 } });
  assert.equal(res.statusCode, 200, res.body);
  assert.ok(calls.some((c) => c.sql.includes('INSERT INTO class_teachers')));
  await app.close();
  // systeemmanager (geen school) mag ook
  const { app: app2 } = await makeApp(superUser, { id: 1, role: 'super', school_id: null });
  const res2 = await app2.inject({ method: 'POST', url: '/api/admin/classes/100/teachers', cookies,
    payload: { userId: 1 } });
  assert.equal(res2.statusCode, 200, res2.body);
  await app2.close();
  // leerlingen niet, en staf van een andere school niet
  const { app: app3 } = await makeApp(superUser, { id: 9, role: 'pupil', school_id: 2 });
  const res3 = await app3.inject({ method: 'POST', url: '/api/admin/classes/100/teachers', cookies,
    payload: { userId: 9 } });
  assert.equal(res3.statusCode, 400);
  await app3.close();
  const { app: app4 } = await makeApp(superUser, { id: 4, role: 'admin', school_id: 3 });
  const res4 = await app4.inject({ method: 'POST', url: '/api/admin/classes/100/teachers', cookies,
    payload: { userId: 4 } });
  assert.equal(res4.statusCode, 400);
  await app4.close();
});

test('ouder-achtige rol krijgt geen promotie en geen klaskoppeling', async () => {
  // rolwijziging: alleen staf → staf; een parent-account mag nooit promoveren
  const { app, calls } = await makeApp(superUser, { id: 7, role: 'parent', school_id: null });
  const res = await app.inject({ method: 'PATCH', url: '/api/admin/users/7', cookies,
    payload: { role: 'admin' } });
  assert.equal(res.statusCode, 200, res.body);
  assert.ok(!calls.some((c) => c.sql.startsWith('UPDATE users SET role')),
    'rolwijziging mag voor een ouder-account niet uitgevoerd worden');
  await app.close();
  // klaskoppeling: parent weigeren, net als pupil
  const { app: app2, calls: calls2 } = await makeApp(superUser, { id: 7, role: 'parent', school_id: null });
  const res2 = await app2.inject({ method: 'POST', url: '/api/admin/classes/100/teachers', cookies,
    payload: { userId: 7 } });
  assert.equal(res2.statusCode, 400);
  assert.ok(!calls2.some((c) => c.sql.includes('INSERT INTO class_teachers')));
  await app2.close();
});

test('hernoemen weigert een lege of te lange naam', async () => {
  const { app } = await makeApp(superUser);
  const res = await app.inject({ method: 'PATCH', url: '/api/admin/schools/5', cookies,
    payload: { name: '   ' } });
  assert.equal(res.statusCode, 400);
  const res2 = await app.inject({ method: 'PATCH', url: '/api/admin/schools/5', cookies,
    payload: { name: 'x'.repeat(90) } });
  assert.equal(res2.statusCode, 400);
  await app.close();
});