<?php

use App\Enums\VatIdCheckStatus;
use App\Services\Billing\VatIdValidationService;
use Illuminate\Support\Facades\Http;

function vatIdService(): VatIdValidationService
{
    return app(VatIdValidationService::class);
}

test('a malformed vat id fails the format check', function () {
    $result = vatIdService()->check('123-nicht-gueltig');

    expect($result['status'])->toBe(VatIdCheckStatus::FormatInvalid);
});

test('a vat id must match the billing country', function () {
    $result = vatIdService()->check('ATU12345678', 'DE');

    expect($result['status'])->toBe(VatIdCheckStatus::FormatInvalid)
        ->and($result['message'])->toContain('passt nicht zum Land');
});

test('greek vat ids use the EL prefix and pass for country GR', function () {
    $result = vatIdService()->check('EL123456789', 'GR');

    expect($result['status'])->not->toBe(VatIdCheckStatus::FormatInvalid);
});

test('german vat ids are format checked but not confirmed online', function () {
    config()->set('billing.own_vat_id', 'DE999999999');

    Http::fake();

    $result = vatIdService()->check('DE123456789', 'DE');

    expect($result['status'])->toBe(VatIdCheckStatus::Unverified);
    Http::assertNothingSent();
});

test('without an own vat id the check stays a format check', function () {
    config()->set('billing.own_vat_id', null);

    Http::fake();

    $result = vatIdService()->check('ATU12345678', 'AT');

    expect($result['status'])->toBe(VatIdCheckStatus::Unverified)
        ->and($result['message'])->toContain('nicht konfiguriert');
    Http::assertNothingSent();
});

test('a foreign eu vat id is confirmed via the evatr api', function () {
    config()->set('billing.own_vat_id', 'DE999999999');

    Http::fake([
        'api.evatr.vies.bzst.de/*' => Http::response(['status' => 'evatr-0000']),
    ]);

    $result = vatIdService()->check('ATU12345678', 'AT');

    expect($result['status'])->toBe(VatIdCheckStatus::Valid);

    Http::assertSent(function ($request): bool {
        return $request['anfragendeUstid'] === 'DE999999999'
            && $request['angefragteUstid'] === 'ATU12345678';
    });
});

test('a rejected evatr status marks the vat id as invalid', function () {
    config()->set('billing.own_vat_id', 'DE999999999');

    Http::fake([
        'api.evatr.vies.bzst.de/*' => Http::response(['status' => 'evatr-1001']),
    ]);

    $result = vatIdService()->check('FRXX999999999', 'FR');

    expect($result['status'])->toBe(VatIdCheckStatus::Invalid)
        ->and($result['message'])->toContain('evatr-1001');
});

test('an unreachable evatr api degrades to unverified', function () {
    config()->set('billing.own_vat_id', 'DE999999999');

    Http::fake([
        'api.evatr.vies.bzst.de/*' => Http::response(null, 503),
    ]);

    $result = vatIdService()->check('NL123456789B01', 'NL');

    expect($result['status'])->toBe(VatIdCheckStatus::Unverified);
});