<?php

namespace Tests\App\Services;

use App\Services\SchoolYearClosingService;
use CodeIgniter\Test\CIUnitTestCase;
use ReflectionClass;

final class SchoolYearClosingServiceTest extends CIUnitTestCase
{
    public function testPromotionBlockerStudentsIncludeIdentifyingInformation(): void
    {
        $service = (new ReflectionClass(SchoolYearClosingService::class))->newInstanceWithoutConstructor();

        $students = $this->privateMethodInvoker($service, 'promotionStudentsWithStatus')([
            [
                'student_id' => 17,
                'student_name' => 'Amina Rahman',
                'school_id' => 'S-1042',
                'class_section_name' => 'Grade 4 - A',
                'status' => 'missing',
            ],
            [
                'student_id' => 18,
                'student_name' => 'Omar Ali',
                'school_id' => 'S-1043',
                'class_section_name' => 'Grade 5 - B',
                'status' => 'decided',
            ],
        ], 'missing');

        $this->assertSame([[
            'student_id' => 17,
            'student_name' => 'Amina Rahman',
            'school_id' => 'S-1042',
            'class_section_name' => 'Grade 4 - A',
        ]], $students);
    }

    public function testLegacyManualDecisionPreventsFalseMissingDecisionBlocker(): void
    {
        $service = (new ReflectionClass(SchoolYearClosingService::class))->newInstanceWithoutConstructor();
        $merge = $this->privateMethodInvoker($service, 'mergeFallbackPromotionDecisions');

        $decisions = $merge([], [[
            'student_id' => 191,
            'decision' => 'Make-up exam in fall',
            'notes' => 'Make-up exam approved.',
        ]]);

        $this->assertSame('decided', $decisions[191]['status']);
        $this->assertSame('MAKE_UP_EXAM', $decisions[191]['normalized_decision']);
        $this->assertSame('manual', $decisions[191]['source']);
    }

    public function testLegacyManualDecisionReplacesStalePendingConsolidatedDecision(): void
    {
        $service = (new ReflectionClass(SchoolYearClosingService::class))->newInstanceWithoutConstructor();
        $merge = $this->privateMethodInvoker($service, 'mergeFallbackPromotionDecisions');

        $decisions = $merge([
            191 => ['status' => 'pending', 'decision' => '', 'source' => 'pending'],
        ], [[
            'student_id' => 191,
            'decision' => 'Make-up exam in fall',
            'notes' => '',
        ]]);

        $this->assertSame('decided', $decisions[191]['status']);
        $this->assertSame('Make-up exam in fall', $decisions[191]['decision']);
    }

    private function privateMethodInvoker(object $object, string $method): callable
    {
        $reflection = new ReflectionClass($object);
        $reflectionMethod = $reflection->getMethod($method);

        return static fn (...$arguments) => $reflectionMethod->invoke($object, ...$arguments);
    }
}