<?php

use App\Models\Country;
use App\Models\ShoppingOrder;
use App\Models\UserInvoice;
use App\Services\DatevExportService;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;
use Tests\TestCase;

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

/**
 * Legt eine Bestellung mit Original- und Stornorechnung an.
 *
 * `cancellation = true` steht an beiden Belegen; nur der Stornobeleg hat kein
 * `cancellation_id` (siehe InvoiceRepository::cancel).
 *
 * @return array{original: UserInvoice, storno: UserInvoice}
 */
function makeCancelledInvoicePair(string $invoiceDate, string $cancellationDate): array
{
    $country = Country::firstOrCreate(
        ['code' => 'DE'],
        [
            'phone' => '49', 'en' => 'Germany', 'de' => 'Deutschland', 'es' => 'Alemania',
            'fr' => 'Allemagne', 'it' => 'Germania', 'ru' => 'Германия',
        ]
    );

    $shoppingUserId = DB::table('shopping_users')->insertGetId([
        'auth_user_id' => 0,
        'member_id' => 0,
        'billing_firstname' => 'Erika',
        'billing_lastname' => 'Mustermann',
        'billing_email' => 'erika-'.uniqid('', true).'@example.com',
        'billing_country_id' => $country->id,
        'shipping_country_id' => $country->id,
        'wp_order_number' => 0,
        'created_at' => now(), 'updated_at' => now(),
    ]);

    $order = ShoppingOrder::forceCreate([
        'shopping_user_id' => $shoppingUserId,
        'auth_user_id' => 0,
        'member_id' => 0,
        'country_id' => $country->id,
        'user_shop_id' => 1,
        'total' => 119.00,
        'total_shipping' => 119.00,
        'tax_split' => ['19' => '19.00'],
        'net_split' => ['19' => '100.00'],
    ]);

    $original = UserInvoice::forceCreate([
        'shopping_order_id' => $order->id,
        'date' => $invoiceDate,
        'month' => (int) date('n', strtotime($invoiceDate)),
        'year' => (int) date('Y', strtotime($invoiceDate)),
        'full_number' => '202699001',
        'number' => 99001,
        'status' => 2,
    ]);

    $storno = UserInvoice::forceCreate([
        'shopping_order_id' => $order->id,
        'date' => $cancellationDate,
        'month' => (int) date('n', strtotime($cancellationDate)),
        'year' => (int) date('Y', strtotime($cancellationDate)),
        'full_number' => '202699002',
        'number' => 99002,
        'status' => 12,
        'cancellation' => true,
    ]);

    $original->cancellation = true;
    $original->cancellation_id = $storno->id;
    $original->cancellation_date = $cancellationDate;
    $original->save();

    return ['original' => $original, 'storno' => $storno];
}

it('buys the revenue in the invoice month and reverses it in the cancellation month', function () {
    makeCancelledInvoicePair('2026-08-15', '2026-09-03');

    $service = new DatevExportService;

    $august = $service->collectInvoiceLines(8, 2026)
        ->concat($service->collectCancellationLines(8, 2026));

    expect($august)->toHaveCount(1);
    expect($august->first()['soll_haben'])->toBe('H');
    expect($august->first()['belegfeld1'])->toBe('202699001');
    expect(round($august->first()['amount_gross'], 2))->toBe(119.00);

    $september = $service->collectInvoiceLines(9, 2026)
        ->concat($service->collectCancellationLines(9, 2026));

    expect($september)->toHaveCount(1);
    expect($september->first()['soll_haben'])->toBe('S');
    expect($september->first()['belegfeld1'])->toBe('202699002');
    expect(round($september->first()['amount_gross'], 2))->toBe(119.00);
});

it('nets a same-month cancellation to zero instead of booking it twice', function () {
    makeCancelledInvoicePair('2026-08-15', '2026-08-20');

    $service = new DatevExportService;

    $lines = $service->collectInvoiceLines(8, 2026)
        ->concat($service->collectCancellationLines(8, 2026));

    expect($lines)->toHaveCount(2);

    $signed = $lines->sum(fn (array $line) => $line['soll_haben'] === 'S'
        ? -$line['amount_gross']
        : $line['amount_gross']);

    expect(round($signed, 2))->toBe(0.00);
});

it('does not treat the cancelled original invoice as a cancellation document', function () {
    makeCancelledInvoicePair('2026-08-15', '2026-08-20');

    $cancellationLines = (new DatevExportService)->collectCancellationLines(8, 2026);

    expect($cancellationLines)->toHaveCount(1);
    expect($cancellationLines->first()['belegfeld1'])->toBe('202699002');
});