<?php

declare(strict_types=1);

namespace App\Tests\Unit\Administration\Application\Query\GetSubjects;

use App\Administration\Application\Dto\PaginatedResult;
use App\Administration\Application\Port\PaginatedSubjectsReader;
use App\Administration\Application\Query\GetSubjects\GetSubjectsHandler;
use App\Administration\Application\Query\GetSubjects\GetSubjectsQuery;
use App\Administration\Application\Query\GetSubjects\SubjectDto;
use App\Administration\Application\Service\Cache\PaginatedQueryCache;
use DateTimeImmutable;
use PHPUnit\Framework\Attributes\Test;
use PHPUnit\Framework\TestCase;
use Symfony\Component\Cache\Adapter\ArrayAdapter;
use Symfony\Component\Cache\Adapter\TagAwareAdapter;

final class GetSubjectsHandlerTest extends TestCase
{
    private PaginatedSubjectsReader $reader;
    private PaginatedQueryCache $cache;
    private GetSubjectsHandler $handler;

    protected function setUp(): void
    {
        $this->reader = $this->createMock(PaginatedSubjectsReader::class);
        $this->cache = new PaginatedQueryCache(
            new TagAwareAdapter(new ArrayAdapter()),
        );
        $this->handler = new GetSubjectsHandler($this->reader, $this->cache);
    }

    #[Test]
    public function returnsItemsForTenant(): void
    {
        $dto = $this->createSubjectDto();
        $this->reader->method('findPaginated')->willReturn(
            new PaginatedResult(items: [$dto], total: 1, page: 1, limit: 30),
        );

        $result = ($this->handler)(new GetSubjectsQuery(tenantId: 'tenant-1', schoolId: 'school-1'));

        self::assertCount(1, $result->items);
        self::assertSame(1, $result->total);
    }

    #[Test]
    public function mapsDtoFields(): void
    {
        $dto = $this->createSubjectDto();
        $this->reader->method('findPaginated')->willReturn(
            new PaginatedResult(items: [$dto], total: 1, page: 1, limit: 30),
        );

        $result = ($this->handler)(new GetSubjectsQuery(tenantId: 'tenant-1', schoolId: 'school-1'));

        $item = $result->items[0];
        self::assertSame('subject-1', $item->id);
        self::assertSame('Mathematiques', $item->name);
        self::assertSame('MATH', $item->code);
        self::assertSame('#3B82F6', $item->color);
        self::assertSame('Maths avancees', $item->description);
        self::assertSame('active', $item->status);
        self::assertSame(2, $item->teacherCount);
        self::assertSame(1, $item->classCount);
    }

    #[Test]
    public function paginatesResults(): void
    {
        $this->reader->method('findPaginated')->willReturn(
            new PaginatedResult(items: [], total: 50, page: 2, limit: 10),
        );

        $result = ($this->handler)(new GetSubjectsQuery(tenantId: 'tenant-1', schoolId: 'school-1', page: 2, limit: 10));

        self::assertSame(50, $result->total);
        self::assertSame(2, $result->page);
        self::assertSame(10, $result->limit);
    }

    #[Test]
    public function cachesResult(): void
    {
        $dto = $this->createSubjectDto();
        $this->reader->expects(self::once())->method('findPaginated')->willReturn(
            new PaginatedResult(items: [$dto], total: 1, page: 1, limit: 30),
        );

        $query = new GetSubjectsQuery(tenantId: 'tenant-1', schoolId: 'school-1');
        ($this->handler)($query);
        $result = ($this->handler)($query);

        self::assertCount(1, $result->items);
    }

    #[Test]
    public function clampsPageToMinimumOne(): void
    {
        $this->reader->method('findPaginated')->willReturn(
            new PaginatedResult(items: [], total: 0, page: 1, limit: 30),
        );

        $result = ($this->handler)(new GetSubjectsQuery(tenantId: 'tenant-1', schoolId: 'school-1', page: -5));

        self::assertSame(1, $result->page);
    }

    #[Test]
    public function clampsLimitToMaximumHundred(): void
    {
        $this->reader->method('findPaginated')->willReturn(
            new PaginatedResult(items: [], total: 0, page: 1, limit: 100),
        );

        $result = ($this->handler)(new GetSubjectsQuery(tenantId: 'tenant-1', schoolId: 'school-1', limit: 500));

        self::assertSame(100, $result->limit);
    }

    private function createSubjectDto(): SubjectDto
    {
        return new SubjectDto(
            id: 'subject-1',
            name: 'Mathematiques',
            code: 'MATH',
            color: '#3B82F6',
            description: 'Maths avancees',
            status: 'active',
            createdAt: new DateTimeImmutable('2026-01-15'),
            updatedAt: new DateTimeImmutable('2026-01-15'),
            teacherCount: 2,
            classCount: 1,
        );
    }
}