<?php

use App\Models\PaymentTransaction;
use App\Models\ShippingCountry;
use App\Models\ShoppingOrder;
use App\Models\ShoppingPayment;
use App\Models\ShoppingUser;
use App\Models\UserShop;
use App\Services\Payment\Payone\DTOs\PayoneWebhookResult;
use App\Services\Payment\Payone\PayoneWebhookHandler;
use App\User;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\Mail;
use Tests\TestCase;

uses(TestCase::class, RefreshDatabase::class);

beforeEach(function (): void {
    Mail::fake();
});

/**
 * Creates a matching order + payment for an 89.00 EUR transaction.
 *
 * @return array{0: ShoppingOrder, 1: ShoppingPayment}
 */
function webhookBootstrap(array $orderOverrides = [], array $paymentOverrides = []): array
{
    $country = ShippingCountry::first() ?? ShippingCountry::create(['shipping_id' => 1, 'country_id' => 1]);

    $shopOwner = User::forceCreate([
        'email' => 'wh-owner-'.uniqid('', true).'@example.com',
        'password' => bcrypt('secret'),
        'lang' => 'de',
    ]);

    $userShop = UserShop::first() ?? UserShop::create([
        'user_id' => $shopOwner->id,
        'name' => 'WH Shop',
        'slug' => 'wh-shop-'.uniqid(),
        'domain' => 'wh-test.local',
    ]);

    $shoppingUser = ShoppingUser::create([
        'auth_user_id' => $shopOwner->id,
        'billing_firstname' => 'Web',
        'billing_lastname' => 'Hook',
        'billing_email' => 'webhook-'.uniqid().'@example.com',
        'billing_country_id' => $country->id,
        'shipping_country_id' => $country->id,
    ]);

    $order = ShoppingOrder::create(array_merge([
        'shopping_user_id' => $shoppingUser->id,
        'auth_user_id' => $shopOwner->id,
        'country_id' => $country->id,
        'user_shop_id' => $userShop->id,
        'total' => 89.00,
        'paid' => false,
        'txaction' => null,
        'mode' => 'test',
    ], $orderOverrides));

    // txaction is not fillable on ShoppingPayment; apply it explicitly after create.
    $paymentTxaction = $paymentOverrides['txaction'] ?? null;
    unset($paymentOverrides['txaction']);

    $payment = ShoppingPayment::create(array_merge([
        'shopping_order_id' => $order->id,
        'reference' => 'wh-ref-'.uniqid(),
        'amount' => 8900,
        'clearingtype' => 'cc',
        'currency' => 'EUR',
        'mode' => 'test',
    ], $paymentOverrides));

    if ($paymentTxaction !== null) {
        $payment->txaction = $paymentTxaction;
        $payment->save();
    }

    return [$order, $payment];
}

function validCallback(ShoppingOrder $order, ShoppingPayment $payment, string $txaction): array
{
    return [
        'key' => config('payone.defaults.key'),
        'txaction' => $txaction,
        'clearingtype' => 'cc',
        'userid' => '158723953',
        'txid' => '321623031',
        'price' => '89.00',
        'param' => $order->id,
        'reference' => $payment->reference,
        'mode' => 'test',
    ];
}

// --- Validation / rejection paths ---

it('rejects an incomplete callback with code 2001', function (): void {
    $result = (new PayoneWebhookHandler)->handle(['txaction' => 'paid']);

    expect($result)->toBeInstanceOf(PayoneWebhookResult::class)
        ->and($result->response)->toBe('TSOK')
        ->and($result->processed)->toBeFalse()
        ->and($result->rejectionCode)->toBe('2001');
});

it('rejects a callback missing txaction with code 2001', function (): void {
    [$order, $payment] = webhookBootstrap();
    $data = validCallback($order, $payment, 'paid');
    unset($data['txaction']);

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->processed)->toBeFalse()
        ->and($result->rejectionCode)->toBe('2001');
});

it('rejects a callback with a wrong key (2002)', function (): void {
    [$order, $payment] = webhookBootstrap();
    $data = validCallback($order, $payment, 'paid');
    $data['key'] = 'totally-wrong-key';

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->processed)->toBeFalse()
        ->and($result->rejectionCode)->toBe('2002');
});

it('rejects when the shopping order is not found (2003)', function (): void {
    [$order, $payment] = webhookBootstrap();
    $data = validCallback($order, $payment, 'paid');
    $data['param'] = 999999;

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->rejectionCode)->toBe('2003');
});

it('rejects when the shopping payment is not found (2004)', function (): void {
    [$order, $payment] = webhookBootstrap();
    $data = validCallback($order, $payment, 'paid');
    $data['reference'] = 'does-not-exist';

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->rejectionCode)->toBe('2004');
});

it('rejects when payment does not belong to the order (2005)', function (): void {
    [$order, $payment] = webhookBootstrap();
    [$otherOrder] = webhookBootstrap();
    $data = validCallback($order, $payment, 'paid');
    // Point param at a different existing order than the payment's order.
    $data['param'] = $otherOrder->id;

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->rejectionCode)->toBe('2005');
});

it('rejects on a price mismatch (2006)', function (): void {
    [$order, $payment] = webhookBootstrap(paymentOverrides: ['amount' => 5000]);
    $data = validCallback($order, $payment, 'paid'); // price 89.00 -> 8900 != 5000

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->rejectionCode)->toBe('2006');
});

// --- Duplicate handling ---

it('ignores a duplicate paid callback when already paid', function (): void {
    [$order, $payment] = webhookBootstrap(
        orderOverrides: ['txaction' => 'paid', 'paid' => true],
        paymentOverrides: ['txaction' => 'paid'],
    );
    $data = validCallback($order, $payment, 'paid');

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->processed)->toBeFalse()
        ->and($result->duplicate)->toBeTrue()
        ->and($result->txaction)->toBe('paid');

    // No new transaction recorded for the ignored duplicate.
    expect(PaymentTransaction::count())->toBe(0);
});

it('ignores a duplicate appointed callback with same txaction', function (): void {
    [$order, $payment] = webhookBootstrap(
        orderOverrides: ['txaction' => 'appointed'],
        paymentOverrides: ['txaction' => 'appointed'],
    );
    $data = validCallback($order, $payment, 'appointed');

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->duplicate)->toBeTrue()
        ->and($result->txaction)->toBe('appointed');
    expect(PaymentTransaction::count())->toBe(0);
});

// --- Processing paths ---

it('processes an appointed callback: records transaction and updates txaction', function (): void {
    [$order, $payment] = webhookBootstrap();
    $data = validCallback($order, $payment, 'appointed');

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->processed)->toBeTrue()
        ->and($result->txaction)->toBe('appointed')
        ->and($result->paid)->toBeFalse();

    $order->refresh();
    $payment->refresh();
    expect($order->txaction)->toBe('appointed')
        ->and($payment->txaction)->toBe('appointed')
        ->and(PaymentTransaction::count())->toBe(1);
});

it('does not downgrade txaction when a lower-priority callback arrives', function (): void {
    // Order already 'paid' (priority 10), incoming 'appointed' (priority 1) must not override.
    [$order, $payment] = webhookBootstrap(
        orderOverrides: ['txaction' => 'paid', 'paid' => true],
        paymentOverrides: ['txaction' => 'pending'],
    );
    $data = validCallback($order, $payment, 'appointed');

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->processed)->toBeTrue();
    $order->refresh();
    expect($order->txaction)->toBe('paid'); // unchanged
    // Transaction still recorded even though txaction was not updated.
    expect(PaymentTransaction::count())->toBe(1);
});

it('processes a paid callback: marks order paid and records transaction', function (): void {
    [$order, $payment] = webhookBootstrap();
    $data = validCallback($order, $payment, 'paid');

    $result = (new PayoneWebhookHandler)->handle($data);

    expect($result->processed)->toBeTrue()
        ->and($result->paid)->toBeTrue()
        ->and($result->mailSent)->toBeTrue();

    $order->refresh();
    expect((bool) $order->paid)->toBeTrue()
        ->and($order->txaction)->toBe('paid')
        ->and(PaymentTransaction::count())->toBe(1);
});