<?php

use App\Models\BillingAddress;
use App\Models\User;
use App\Services\Billing\StripeCheckoutService;
use Illuminate\Support\Facades\Http;

test('the stripe recipient name prefers the billing company over names', function () {
    $user = User::factory()->create(['name' => 'Login Anzeigename']);
    BillingAddress::factory()->create([
        'user_id' => $user->id,
        'company' => 'Beispiel GmbH',
        'name' => 'Max Mustermann',
    ]);

    expect($user->fresh()->stripeName())->toBe('Beispiel GmbH');
});

test('the stripe recipient name falls back to the billing name, then the display name', function () {
    $user = User::factory()->create(['name' => 'Login Anzeigename']);
    BillingAddress::factory()->create([
        'user_id' => $user->id,
        'company' => null,
        'name' => 'Max Mustermann',
    ]);

    expect($user->fresh()->stripeName())->toBe('Max Mustermann');

    $withoutAddress = User::factory()->create(['name' => 'Nur Anzeigename']);

    expect($withoutAddress->stripeName())->toBe('Nur Anzeigename');
});

test('the stripe address mirrors the billing address', function () {
    $user = User::factory()->create();
    BillingAddress::factory()->create([
        'user_id' => $user->id,
        'address1' => 'Rechnungsweg 12',
        'address2' => 'Hinterhaus',
        'postal_code' => '33739',
        'city' => 'Bielefeld',
        'country_code' => 'DE',
    ]);

    expect($user->fresh()->stripeAddress())->toBe([
        'line1' => 'Rechnungsweg 12',
        'line2' => 'Hinterhaus',
        'postal_code' => '33739',
        'city' => 'Bielefeld',
        'country' => 'DE',
    ]);

    expect(User::factory()->create()->stripeAddress())->toBeNull();
});

test('checkout session options leave the stripe customer untouched when a billing address exists', function () {
    $user = User::factory()->create();
    BillingAddress::factory()->create(['user_id' => $user->id]);

    $options = invokeSessionOptions($user->fresh());

    expect($options['billing_address_collection'])->toBe('auto')
        ->and($options['automatic_tax'])->toBe(['enabled' => true])
        ->and($options)->not->toHaveKeys(['customer_update', 'tax_id_collection']);
});

test('checkout session options collect the address in stripe when no billing address exists', function () {
    $options = invokeSessionOptions(User::factory()->create());

    expect($options['billing_address_collection'])->toBe('required')
        ->and($options['tax_id_collection'])->toBe(['enabled' => true])
        ->and($options['customer_update'])->toBe(['address' => 'auto', 'name' => 'auto']);
});

test('one-time checkouts enable stripe invoice creation, subscription checkouts do not', function () {
    $user = User::factory()->create();
    BillingAddress::factory()->create(['user_id' => $user->id]);
    $user = $user->fresh();

    // Payment-Mode: ohne invoice_creation erzeugt Stripe keine Rechnung —
    // und damit gäbe es kein invoice.payment_succeeded für die STR-Spiegelung.
    $oneTime = invokeSessionOptions($user, 'oneTimeSessionOptions');
    expect($oneTime['invoice_creation'])->toBe(['enabled' => true])
        ->and($oneTime['automatic_tax'])->toBe(['enabled' => true]);

    // Subscription-Mode lehnt invoice_creation ab — dort erzeugt Stripe
    // die Rechnungen ohnehin selbst.
    expect(invokeSessionOptions($user))->not->toHaveKey('invoice_creation');
});

test('the checkout vat id is re-verified via evatr before every booking', function () {
    config()->set('billing.own_vat_id', 'DE999999999');
    Http::fake(['api.evatr.vies.bzst.de/*' => Http::response(['status' => 'evatr-0000'])]);

    $user = User::factory()->create();
    BillingAddress::factory()->create([
        'user_id' => $user->id,
        'country_code' => 'AT',
        // Normalisierung: Großschreibung, Leerzeichen entfernt.
        'vat_id' => 'atu 12345678',
    ]);

    expect(invokeVerifiedVatId($user->fresh()))->toBe('ATU12345678');

    Http::assertSent(fn ($request): bool => $request['angefragteUstid'] === 'ATU12345678');
});

test('a vat id rejected by evatr is withheld from stripe', function () {
    // Kern des Befunds vom 08.07.: abgelaufene USt-IDs dürfen nicht weiter
    // steuerfrei (Reverse Charge) buchen — die Buchung läuft dann mit Steuer.
    config()->set('billing.own_vat_id', 'DE999999999');
    Http::fake(['api.evatr.vies.bzst.de/*' => Http::response(['status' => 'evatr-1001'])]);

    $user = User::factory()->create();
    BillingAddress::factory()->create([
        'user_id' => $user->id,
        'country_code' => 'AT',
        'vat_id' => 'ATU99999999',
    ]);

    expect(invokeVerifiedVatId($user->fresh()))->toBeNull();
});

test('an unreachable evatr api keeps the vat id usable for the booking', function () {
    // Fail-open: Ein Ausfall der BZSt-API darf Bestandskunden nicht
    // plötzlich Steuer berechnen — nur definitive Ablehnungen halten zurück.
    config()->set('billing.own_vat_id', 'DE999999999');
    Http::fake(['api.evatr.vies.bzst.de/*' => Http::response(null, 503)]);

    $user = User::factory()->create();
    BillingAddress::factory()->create([
        'user_id' => $user->id,
        'country_code' => 'NL',
        'vat_id' => 'NL123456789B01',
    ]);

    expect(invokeVerifiedVatId($user->fresh()))->toBe('NL123456789B01');
});

test('german vat ids pass without an online check, non-eu and missing ids yield nothing', function () {
    config()->set('billing.own_vat_id', 'DE999999999');
    Http::fake();

    // Deutsche ID: eVatR kann sie nicht prüfen — Formatprüfung genügt.
    $german = User::factory()->create();
    BillingAddress::factory()->create(['user_id' => $german->id, 'country_code' => 'DE', 'vat_id' => 'DE123456789']);
    expect(invokeVerifiedVatId($german->fresh()))->toBe('DE123456789');

    // Ohne USt-ID und außerhalb der EU gibt es nichts zu übergeben.
    $without = User::factory()->create();
    BillingAddress::factory()->create(['user_id' => $without->id, 'vat_id' => null]);
    expect(invokeVerifiedVatId($without->fresh()))->toBeNull();

    $swiss = User::factory()->create();
    BillingAddress::factory()->create(['user_id' => $swiss->id, 'country_code' => 'CH', 'vat_id' => 'CHE123456789']);
    expect(invokeVerifiedVatId($swiss->fresh()))->toBeNull();

    Http::assertNothingSent();
});

test('a vat id that does not match the billing country is withheld from stripe', function () {
    config()->set('billing.own_vat_id', 'DE999999999');
    Http::fake();

    $user = User::factory()->create();
    BillingAddress::factory()->create([
        'user_id' => $user->id,
        'country_code' => 'DE',
        'vat_id' => 'ATU12345678',
    ]);

    expect(invokeVerifiedVatId($user->fresh()))->toBeNull();
    Http::assertNothingSent();
});

/**
 * @return array<string, mixed>
 */
function invokeSessionOptions(User $user, string $method = 'sessionOptions'): array
{
    $service = app(StripeCheckoutService::class);
    $method = new ReflectionMethod($service, $method);

    return $method->invoke($service, $user);
}

function invokeVerifiedVatId(User $user): ?string
{
    $service = app(StripeCheckoutService::class);

    return (new ReflectionMethod($service, 'verifiedVatIdForCheckout'))->invoke($service, $user);
}