<?php

declare(strict_types=1);

namespace App\Tests\Unit\Scolarite\Application\Service;

use App\Scolarite\Application\Query\GetClassStatisticsDetail\ClassStatisticsDetailDto;
use App\Scolarite\Application\Query\GetClassStatisticsDetail\StudentAverageDto;
use App\Scolarite\Application\Service\StatisticsExporter;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;

use function str_contains;

final class StatisticsExporterTest extends TestCase
{
    private StatisticsExporter $exporter;

    protected function setUp(): void
    {
        $this->exporter = new StatisticsExporter();
    }

    #[Test]
    public function itExportsClassStatisticsToCsv(): void
    {
        $stats = new ClassStatisticsDetailDto(
            average: 12.5,
            successRate: 72.0,
            distribution: [0, 0, 1, 2, 3, 2, 1, 0],
            evolution: [],
            students: [
                new StudentAverageDto(
                    studentId: 's1',
                    studentName: 'Alice Dupont',
                    average: 14.0,
                    inDifficulty: false,
                    trend: 'improving',
                ),
                new StudentAverageDto(
                    studentId: 's2',
                    studentName: 'Bob Martin',
                    average: 7.0,
                    inDifficulty: true,
                    trend: 'declining',
                ),
            ],
        );

        $csv = $this->exporter->exportClassToCsv($stats, '6ème A', 'Mathématiques');

        self::assertNotSame('', $csv);
        self::assertTrue(str_contains($csv, '6ème A'));
        self::assertTrue(str_contains($csv, 'Mathématiques'));
        self::assertTrue(str_contains($csv, '12.5'));
        self::assertTrue(str_contains($csv, '72%'));
        self::assertTrue(str_contains($csv, 'Alice Dupont'));
        self::assertTrue(str_contains($csv, '14'));
        self::assertTrue(str_contains($csv, 'Progression'));
        self::assertTrue(str_contains($csv, 'Bob Martin'));
        self::assertTrue(str_contains($csv, 'Oui'));
        self::assertTrue(str_contains($csv, 'Régression'));
    }

    #[Test]
    public function itHandlesEmptyStudentList(): void
    {
        $stats = new ClassStatisticsDetailDto(
            average: null,
            successRate: 0.0,
            distribution: [0, 0, 0, 0, 0, 0, 0, 0],
            evolution: [],
            students: [],
        );

        $csv = $this->exporter->exportClassToCsv($stats, '5ème B', 'Français');

        self::assertNotSame('', $csv);
        self::assertTrue(str_contains($csv, '5ème B'));
        self::assertTrue(str_contains($csv, 'N/A'));
    }
}