<?php

declare(strict_types=1);

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

use App\Scolarite\Application\Port\PeriodFinder;
use App\Scolarite\Application\Port\PeriodInfo;
use App\Scolarite\Application\Query\GetTeacherStatisticsOverview\GetTeacherStatisticsOverviewHandler;
use App\Scolarite\Application\Query\GetTeacherStatisticsOverview\GetTeacherStatisticsOverviewQuery;
use App\Scolarite\Infrastructure\ReadModel\InMemoryTeacherStatisticsReader;
use App\Shared\Domain\Tenant\TenantId;
use DateTimeImmutable;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;

final class GetTeacherStatisticsOverviewHandlerTest 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;

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

    #[Test]
    public function itReturnsEmptyWhenNoPeriodFound(): void
    {
        $handler = $this->createHandler(periodInfo: null);

        $result = $handler(new GetTeacherStatisticsOverviewQuery(
            teacherId: self::TEACHER_ID,
            tenantId: self::TENANT_ID,
        ));

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

    #[Test]
    public function itReturnsClassOverviewDtos(): void
    {
        $this->reader->feedClassesSummary([
            [
                'classId' => 'class-1',
                'className' => '6ème A',
                'subjectId' => 'subject-1',
                'subjectName' => 'Mathématiques',
                'evaluationCount' => 3,
                'studentCount' => 25,
                'average' => 12.5,
                'successRate' => 72.0,
            ],
            [
                'classId' => 'class-2',
                'className' => '5ème B',
                'subjectId' => 'subject-1',
                'subjectName' => 'Mathématiques',
                'evaluationCount' => 2,
                'studentCount' => 28,
                'average' => 10.8,
                'successRate' => 57.0,
            ],
        ]);

        $handler = $this->createHandler(periodInfo: $this->currentPeriod());

        $result = $handler(new GetTeacherStatisticsOverviewQuery(
            teacherId: self::TEACHER_ID,
            tenantId: self::TENANT_ID,
        ));

        self::assertCount(2, $result);
        self::assertSame('6ème A', $result[0]->className);
        self::assertSame(12.5, $result[0]->average);
        self::assertSame(72.0, $result[0]->successRate);
        self::assertSame('5ème B', $result[1]->className);
    }

    private function createHandler(?PeriodInfo $periodInfo): GetTeacherStatisticsOverviewHandler
    {
        $periodFinder = new class($periodInfo) implements PeriodFinder {
            public function __construct(private readonly ?PeriodInfo $info)
            {
            }

            public function findForDate(DateTimeImmutable $date, TenantId $tenantId): ?PeriodInfo
            {
                return $this->info;
            }
        };

        return new GetTeacherStatisticsOverviewHandler($this->reader, $periodFinder);
    }

    private function currentPeriod(): PeriodInfo
    {
        return new PeriodInfo(
            periodId: 'period-1',
            startDate: new DateTimeImmutable('2026-01-05'),
            endDate: new DateTimeImmutable('2026-03-31'),
        );
    }
}