<?php

namespace Tests\Feature;

use App\Domains\Event\Actions\CreateEvent\CreateEventCommand;
use App\Domains\Event\Actions\CreateEvent\CreateEventRequest;
use App\Domains\Event\Actions\SignUp\SignUpCommand;
use App\Domains\Event\Actions\SignUp\SignUpRequest;
use App\Enumerations\EatingHabit;
use App\Enumerations\EfzStatus;
use App\Enumerations\FirstAidPermission;
use App\Enumerations\ParticipationFeeType;
use App\Enumerations\ParticipationType;
use App\Enumerations\SwimmingPermission;
use App\Models\Event;
use App\Models\PaymentMethod;
use App\Models\Tenant;
use App\ValueObjects\Amount;
use DateTime;
use Illuminate\Foundation\Testing\RefreshDatabase;
use Illuminate\Support\Facades\DB;
use Tests\TestCase;

/**
 * Die Rechnungsnummer wird nirgends gespeichert, sondern aus `events.invoice_key` und
 * `event_participants.invoice_sequence` zusammengesetzt. Beide Bausteine müssen deshalb stabil sein.
 */
class InvoiceNumberingTest extends TestCase
{
    use RefreshDatabase;

    private Tenant $wildeMoehre;

    protected function setUp(): void
    {
        parent::setUp();

        $this->wildeMoehre = $this->makeTenant('wm', 'Wilde Möhre');

        DB::table('participation_fee_types')->insert(['slug' => 'fixed', 'name' => 'Fix']);
        EatingHabit::create(['slug' => EatingHabit::EATING_HABIT_VEGAN, 'name' => 'Vegan']);
        EatingHabit::create(['slug' => EatingHabit::EATING_HABIT_VEGETARIAN, 'name' => 'Vegetarisch']);
        ParticipationType::create(['slug' => ParticipationType::PARTICIPATION_TYPE_PARTICIPANT, 'name' => 'Teilnehmende']);
        PaymentMethod::create(['slug' => PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION]);
        EfzStatus::create(['slug' => EfzStatus::EFZ_STATUS_NOT_CHECKED, 'name' => 'Nicht geprüft']);
        EfzStatus::create(['slug' => EfzStatus::EFZ_STATUS_NOT_REQUIRED, 'name' => 'Nicht erforderlich']);
        SwimmingPermission::create(['slug' => SwimmingPermission::SWIMMING_PERMISSION_ALLOWED, 'name' => 'Darf baden', 'short' => 'Erteilt']);
        FirstAidPermission::create(['slug' => FirstAidPermission::FIRST_AID_PERMISSION_ALLOWED, 'name' => 'Zugestimmt', 'description' => '']);

        app()->instance('tenant', $this->wildeMoehre);
    }

    /**
     * `create()` liefert nur die übergebenen Attribute zurück; die DB-Defaults (u.a. `tax_liable`) stehen
     * erst nach dem Neuladen bereit -- so, wie der Tenant im Betrieb aus der IdentifyTenant-Middleware kommt.
     */
    private function makeTenant(string $slug, string $name): Tenant
    {
        return Tenant::create([
            'slug' => $slug,
            'name' => $name,
            'address_1' => 'Musterweg 1',
            'email' => $slug . '@example.com',
            'email_finance' => $slug . '-f@example.com',
            'url' => $slug . '.test.local',
            'account_name' => $name,
            'account_iban' => 'DE00',
            'account_bic' => 'XY',
            'city' => 'Stadt',
            'postcode' => '00000',
            'invoice_prefix' => strtoupper($slug),
            'is_active_local_group' => true,
            'has_active_instance' => true,
        ])->fresh();
    }

    private function createEvent(string $begin, string $name = 'Lager'): Event
    {
        $response = new CreateEventCommand(new CreateEventRequest(
            name: $name,
            location: 'Ort',
            postalCode: '00000',
            email: 'e@example.com',
            begin: new DateTime($begin),
            end: new DateTime($begin),
            earlyBirdEnd: new DateTime('2026-01-01'),
            registrationFinalEnd: new DateTime('2026-01-02'),
            earlyBirdEndAmountIncrease: 0,
            participationFeeType: ParticipationFeeType::where('slug', 'fixed')->first(),
            accountOwner: 'Owner',
            accountIban: 'DE00',
            payPerDay: false,
        ))->execute();

        $this->assertTrue($response->success);

        return $response->event->fresh();
    }

    /*
    |--------------------------------------------------------------------------
    | Event-Teil der Nummer
    |--------------------------------------------------------------------------
    */

    public function test_events_of_the_same_month_are_numbered_consecutively(): void
    {
        $this->assertSame('WM-V-20260701', $this->createEvent('2026-07-16')->invoice_key);
        $this->assertSame('WM-V-20260702', $this->createEvent('2026-07-24')->invoice_key);
        // Anderer Monat, eigene Zählung.
        $this->assertSame('WM-V-20260801', $this->createEvent('2026-08-03')->invoice_key);
    }

    public function test_each_tenant_counts_for_itself(): void
    {
        $this->createEvent('2026-07-16');

        app()->instance('tenant', $this->makeTenant('sn', 'Sachsen'));

        $this->assertSame('SN-V-20260701', $this->createEvent('2026-07-18')->invoice_key);
    }

    public function test_invoice_key_survives_moving_the_event_to_another_month(): void
    {
        $event = $this->createEvent('2026-07-16');

        $event->update(['start_date' => '2026-11-05', 'end_date' => '2026-11-07']);

        // Eingefroren: eine bereits herausgegebene Rechnung gehört sonst plötzlich zu einer anderen Nummer.
        $this->assertSame('WM-V-20260701', $event->fresh()->invoice_key);
    }

    public function test_new_tenants_default_to_their_uppercased_slug(): void
    {
        $tenant = Tenant::create([
            'slug' => 'fen',
            'name' => 'Fen',
            'email' => 'fen@example.com',
            'email_finance' => 'fen-f@example.com',
            'url' => 'fen.test.local',
            'account_name' => 'Fen',
            'account_iban' => 'DE00',
            'account_bic' => 'XY',
            'city' => 'Stadt',
            'postcode' => '00000',
            'is_active_local_group' => true,
            'has_active_instance' => true,
        ])->fresh();

        // Ohne gesetztes Präfix greift der Migrations-Default: der großgeschriebene Slug.
        $this->assertSame('FEN', $tenant->invoice_prefix);

        app()->instance('tenant', $tenant);

        $this->assertSame('FEN-V-20260701', $this->createEvent('2026-07-16')->invoice_key);
    }

    /*
    |--------------------------------------------------------------------------
    | Teilnehmer-Teil der Nummer
    |--------------------------------------------------------------------------
    */

    private function signUp(Event $event, string $firstname): void
    {
        $response = new SignUpCommand(new SignUpRequest(
            $event, null, $firstname, 'Muster', null, ParticipationType::PARTICIPATION_TYPE_PARTICIPANT,
            $this->wildeMoehre, new DateTime('2000-01-01'), 'Weg 1', null, '00000', 'Stadt',
            strtolower($firstname) . '@example.com', '123', null, null, null, null, null, null, null,
            'vegan', null, null, false, false, false, false, false,
            new DateTime('2026-07-16'), new DateTime('2026-07-16'), 0, 0, null,
            new Amount(50.0, 'Euro'), PaymentMethod::PAYMENT_ACCOUNT_TRANSACTION,
        ))->execute();

        $this->assertTrue($response->success, $response->message ?? '');
    }

    public function test_sequences_are_handed_out_in_order(): void
    {
        $event = $this->createEvent('2026-07-16');

        $this->signUp($event, 'Ada');
        $this->signUp($event, 'Bo');
        $this->signUp($event, 'Cem');

        $this->assertSame([1, 2, 3], $event->participants()->orderBy('id')->pluck('invoice_sequence')->all());
    }

    public function test_signing_off_does_not_shift_later_sequences(): void
    {
        $event = $this->createEvent('2026-07-16');

        $this->signUp($event, 'Ada');
        $this->signUp($event, 'Bo');

        // Abmeldung: der Datensatz bleibt bestehen, die Nummer damit vergeben.
        $event->participants()->orderBy('id')->first()->update(['unregistered_at' => '2026-07-01']);

        $this->signUp($event, 'Cem');

        $this->assertSame(3, $event->participants()->orderBy('id')->get()->last()->invoice_sequence);
    }

    public function test_sequences_are_per_event(): void
    {
        $first = $this->createEvent('2026-07-16', 'Erstes');
        $second = $this->createEvent('2026-07-24', 'Zweites');

        $this->signUp($first, 'Ada');
        $this->signUp($second, 'Bo');

        $this->assertSame(1, $first->participants()->first()->invoice_sequence);
        $this->assertSame(1, $second->participants()->first()->invoice_sequence);
    }
}