<?php

declare(strict_types=1);

namespace App\Tests\Service;

use App\Enum\VoucherCodeKind;
use App\Service\VoucherCodeClassifier;
use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;

class VoucherCodeClassifierTest extends TestCase
{
    private VoucherCodeClassifier $classifier;

    protected function setUp(): void
    {
        $this->classifier = new VoucherCodeClassifier(['lw0705' => '2027-04-30']);
    }

    /**
     * @return iterable<string, array{string, VoucherCodeKind}>
     */
    public static function codes(): iterable
    {
        yield 'prefixed promo' => ['R-SOMMER26', VoucherCodeKind::Promo];
        yield 'prefixed promo in lowercase' => ['r-sommer26', VoucherCodeKind::Promo];
        yield 'legacy promo, matched case-insensitively' => ['Lw0705', VoucherCodeKind::Promo];
        yield 'purchase code' => ['1F7V6PADRZ', VoucherCodeKind::Purchase];
        yield 'purchase code in lowercase' => ['1f7v6padrz', VoucherCodeKind::Purchase];
        yield 'surrounding whitespace' => ['  1F7V6PADRZ ', VoucherCodeKind::Purchase];
        yield 'hyphen without the promo prefix' => ['X-1F7V6PADRZ', VoucherCodeKind::Malformed];
        yield 'characters outside the code alphabet' => ['1F7V 6PADRZ', VoucherCodeKind::Malformed];
        yield 'empty' => ['  ', VoucherCodeKind::Malformed];
        yield 'too long' => [str_repeat('A', 51), VoucherCodeKind::Malformed];
    }

    #[DataProvider('codes')]
    public function testClassify(string $code, VoucherCodeKind $expected): void
    {
        self::assertSame($expected, $this->classifier->classify($code, new \DateTimeImmutable('2026-10-06')));
    }

    public function testLegacyCodeIsRecognisedOnItsLastDay(): void
    {
        self::assertSame(VoucherCodeKind::Promo, $this->classifier->classify('LW0705', new \DateTimeImmutable('2027-04-30')));
    }

    public function testLegacyCodeIsAPurchaseCodeOnceExpired(): void
    {
        self::assertSame(VoucherCodeKind::Purchase, $this->classifier->classify('LW0705', new \DateTimeImmutable('2027-05-01')));
    }

    public function testNormalizeTrimsAndUppercases(): void
    {
        self::assertSame('R-SOMMER26', $this->classifier->normalize(' r-Sommer26 '));
    }
}