<?php

namespace Tests\App\Controllers\View;

use App\Controllers\View\ParentController;
use App\Support\Enrollment\DeliberationDecision;
use CodeIgniter\Test\CIUnitTestCase;
use ReflectionMethod;

final class ParentControllerAgeTest extends CIUnitTestCase
{
    public function testEnrollmentAgeUsesSeptemberFirstSchoolYearCutoff(): void
    {
        $controller = new class extends ParentController {
            public function __construct()
            {
            }
        };

        $method = new ReflectionMethod(ParentController::class, 'calculateAgeAsOfSchoolYearStartYear');
        $method->setAccessible(true);

        $this->assertSame(5, $method->invoke($controller, '2019-09-15', '2025-2026'));
        $this->assertSame(5, $method->invoke($controller, '2020-01-01', '2025-2026'));
        $this->assertSame(4, $method->invoke($controller, '2020-09-02', '2025-2026'));
    }

    public function testEnrollmentAgeRejectsInvalidInputs(): void
    {
        $controller = new class extends ParentController {
            public function __construct()
            {
            }
        };

        $method = new ReflectionMethod(ParentController::class, 'calculateAgeAsOfSchoolYearStartYear');
        $method->setAccessible(true);

        $this->assertNull($method->invoke($controller, '', '2025-2026'));
        $this->assertNull($method->invoke($controller, 'not-a-date', '2025-2026'));
        $this->assertNull($method->invoke($controller, '2026-01-01', '2025-2026'));
        $this->assertNull($method->invoke($controller, '2019-09-15', ''));
    }

    public function testRegistrationValidationUsesDecemberThirtyFirstOnlyForMinimumAgeGrace(): void
    {
        $controller = new class extends ParentController {
            public function __construct()
            {
            }
        };

        $this->assertTrue($controller->validateDobAge('2020-12-31', '2025-12-31', 5, 18, '2025-09-01')['isValid']);
        $this->assertFalse($controller->validateDobAge('2021-01-01', '2025-12-31', 5, 18, '2025-09-01')['isValid']);
        $this->assertTrue($controller->validateDobAge('2006-09-02', '2025-12-31', 5, 18, '2025-09-01')['isValid']);
        $this->assertFalse($controller->validateDobAge('2006-08-31', '2025-12-31', 5, 18, '2025-09-01')['isValid']);
    }

    public function testEnrollmentEligibilityBlocksFinalDecisionStatuses(): void
    {
        $controller = new class extends ParentController {
            public function __construct()
            {
            }
        };

        $method = new ReflectionMethod(ParentController::class, 'enrollmentEligibilityMessageForStudent');
        $method->setAccessible(true);

        foreach (['expel', 'withdrawn', 'deferred decision'] as $decision) {
            $message = $method->invoke(
                $controller,
                ['firstname' => 'Ali', 'lastname' => 'Ahmed', 'dob' => '2010-01-01'],
                ['decision' => $decision, 'source' => 'manual', 'class_section_name' => 'Level 5'],
                '2025-2026',
                null
            );

            $this->assertTrue($message['blocking'], $decision . ' should block enrollment.');
            $this->assertNotSame('', $message['message']);
        }
    }

    public function testEnrollmentEligibilityBlocksAdultStudentsOnSeptemberFirst(): void
    {
        $controller = new class extends ParentController {
            public function __construct()
            {
            }
        };

        $method = new ReflectionMethod(ParentController::class, 'enrollmentEligibilityMessageForStudent');
        $method->setAccessible(true);

        $message = $method->invoke(
            $controller,
            ['firstname' => 'Ali', 'lastname' => 'Ahmed', 'dob' => '2006-08-31'],
            ['decision' => 'pass', 'source' => 'manual', 'class_section_name' => 'Level 9'],
            '2025-2026',
            null
        );

        $this->assertTrue($message['blocking']);
        $this->assertStringContainsString('18 years old or older on September 1', $message['message']);
        $this->assertStringContainsString('A parent or guardian cannot complete registration', $message['message']);
    }

    public function testEnrollmentEligibilityAllowsFallMakeupExamWithWarning(): void
    {
        $controller = new class extends ParentController {
            public function __construct()
            {
            }
        };

        $method = new ReflectionMethod(ParentController::class, 'enrollmentEligibilityMessageForStudent');
        $method->setAccessible(true);

        $message = $method->invoke(
            $controller,
            ['firstname' => 'Ali', 'lastname' => 'Ahmed', 'dob' => '2010-01-01'],
            ['decision' => 'Make Up Exam in Fall', 'source' => 'manual', 'class_section_name' => 'Level 5'],
            '2025-2026',
            '2025-09-10'
        );

        $this->assertFalse($message['blocking']);
        $this->assertSame('warning', $message['level']);
        $this->assertStringContainsString('will initially remain in the same grade', $message['message']);
    }

    public function testRequiredActionDoesNotDefaultToContactAdministration(): void
    {
        $controller = new class extends ParentController {
            public function __construct()
            {
            }
        };

        $method = new ReflectionMethod(ParentController::class, 'requiredActionLabel');
        $method->setAccessible(true);

        $this->assertSame(
            'Complete re-enrollment before the registration deadline.',
            $method->invoke($controller, null)
        );

        $this->assertSame(
            'Complete re-enrollment before the registration deadline.',
            $method->invoke($controller, [
                'blockers' => [],
                'deliberation_decision' => DeliberationDecision::PASSED,
                'parent_enrollment_allowed' => true,
            ])
        );

        $this->assertSame(
            'Contact the school administration.',
            $method->invoke($controller, [
                'blockers' => ['Final decision is pending.'],
                'deliberation_decision' => DeliberationDecision::DEFERRED_DECISION,
                'parent_enrollment_allowed' => false,
            ])
        );
    }

}