<?php

namespace Tests\App\Controllers\View {

    use App\Controllers\View\RegisterController;
    use CodeIgniter\HTTP\RedirectResponse;
    use CodeIgniter\Test\CIUnitTestCase;
    use Config\Services;

    class TestableRegisterController extends RegisterController
    {
        public function __construct()
        {
            // Skip the heavy constructor that connects to the real database.
        }
    }

    class RegisterControllerTest extends CIUnitTestCase
    {
        private TestableRegisterController $controller;

        protected function setUp(): void
        {
            parent::setUp();

            Services::resetSingle('session');
            session()->start();

            $this->controller = new TestableRegisterController();
        }

        protected function tearDown(): void
        {
            session()->remove('captcha_answer');
            session()->remove('user_email');
            parent::tearDown();
        }

        public function testIndexGeneratesCaptchaWhenMissing()
        {
            session()->remove('captcha_answer');

            $response = $this->controller->index();

            $this->assertIsString($response);
            $captcha = session()->get('captcha_answer');
            $this->assertNotEmpty($captcha);
            $this->assertGreaterThanOrEqual(4, strlen($captcha));
            $this->assertLessThanOrEqual(8, strlen($captcha));
        }

        public function testIndexReusesExistingCaptcha()
        {
            session()->set('captcha_answer', 'EXISTING');

            $response = $this->controller->index();

            $this->assertIsString($response);
            $this->assertSame('EXISTING', session()->get('captcha_answer'));
        }

        public function testSuccessRedirectsWhenEmailMissing()
        {
            session()->remove('user_email');

            $response = $this->controller->success();

            $this->assertInstanceOf(RedirectResponse::class, $response);
            $this->assertStringContainsString('/register', $response->getHeaderLine('Location') ?: '');
        }

        public function testSuccessReturnsViewWhenEmailPresent()
        {
            session()->set('user_email', 'parent@example.com');

            $response = $this->controller->success();

            $this->assertIsString($response);
            $this->assertSame('parent@example.com', session()->get('user_email'));
        }
    }
}