<?php

declare(strict_types=1);

namespace App\Tests\Unit\Scolarite\Application\Query\GetEvaluationDifficulty;

use App\Scolarite\Application\Query\GetEvaluationDifficulty\GetEvaluationDifficultyHandler;
use App\Scolarite\Application\Query\GetEvaluationDifficulty\GetEvaluationDifficultyQuery;
use App\Scolarite\Domain\Service\TeacherStatisticsCalculator;
use App\Scolarite\Infrastructure\ReadModel\InMemoryTeacherStatisticsReader;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;

final class GetEvaluationDifficultyHandlerTest extends TestCase
{
    private const string TEACHER_ID = '550e8400-e29b-41d4-a716-446655440010';
    private const string TENANT_ID = '550e8400-e29b-41d4-a716-446655440001';

    private InMemoryTeacherStatisticsReader $reader;
    private GetEvaluationDifficultyHandler $handler;

    protected function setUp(): void
    {
        $this->reader = new InMemoryTeacherStatisticsReader();
        $this->handler = new GetEvaluationDifficultyHandler(
            $this->reader,
            new TeacherStatisticsCalculator(),
        );
    }

    #[Test]
    public function itReturnsEmptyWhenNoEvaluations(): void
    {
        $result = ($this->handler)($this->query());

        self::assertSame([], $result);
    }

    #[Test]
    public function itReturnsEvaluationDifficultyWithComparison(): void
    {
        $this->reader->feedEvaluationDifficulties([
            [
                'evaluationId' => 'eval-1',
                'title' => 'Contrôle chapitre 5',
                'classId' => 'class-1',
                'className' => '6ème A',
                'subjectId' => 'subject-1',
                'subjectName' => 'Mathématiques',
                'date' => '2026-03-15',
                'average' => 12.0,
                'gradedCount' => 25,
            ],
        ]);

        // Other teachers' averages for same subject
        $this->reader->feedOtherTeachersAverages([10.0, 11.0, 13.0]);

        $result = ($this->handler)($this->query());

        self::assertCount(1, $result);
        self::assertSame('Contrôle chapitre 5', $result[0]->title);
        self::assertSame(12.0, $result[0]->average);
        self::assertEqualsWithDelta(11.33, $result[0]->subjectAverage, 0.01);
        self::assertNotNull($result[0]->percentile);
    }

    #[Test]
    public function itHandlesNoOtherTeachersForComparison(): void
    {
        $this->reader->feedEvaluationDifficulties([
            [
                'evaluationId' => 'eval-1',
                'title' => 'Test unique',
                'classId' => 'class-1',
                'className' => '6ème A',
                'subjectId' => 'subject-1',
                'subjectName' => 'Musique',
                'date' => '2026-03-15',
                'average' => 14.0,
                'gradedCount' => 20,
            ],
        ]);

        $this->reader->feedOtherTeachersAverages([]);

        $result = ($this->handler)($this->query());

        self::assertCount(1, $result);
        self::assertNull($result[0]->subjectAverage);
        self::assertNull($result[0]->percentile);
    }

    private function query(): GetEvaluationDifficultyQuery
    {
        return new GetEvaluationDifficultyQuery(
            teacherId: self::TEACHER_ID,
            tenantId: self::TENANT_ID,
        );
    }
}