<?php

use App\Enums\ActivityType;
use App\Enums\EmailBounceKind;
use App\Models\ActivityEvent;
use App\Models\EmailBounce;
use App\Services\Mail\BounceMailProcessor;
use App\Services\Mail\DsnParser;
use App\Services\Mail\EmailSuppressionService;
use Tests\TestCase;

/**
 * Rückläufer aus dem Bounce-Postfach lesen (Roadmap 1b.6, Schritt 3):
 * eigener DSN-Parser nach RFC 3464, kein Raten aus dem Fließtext.
 */
function bounceFixture(string $name): string
{
    return (string) file_get_contents(base_path("tests/Fixtures/bounces/{$name}.eml"));
}

test('a postfix hard bounce yields recipient, status, diagnostic and our reference header', function () {
    /** @var TestCase $this */
    $report = app(DsnParser::class)->parse(bounceFixture('hard-5.1.1'));

    expect($report)->not->toBeNull()
        ->and($report->messageId)->toBe('20260915071233.ABC123@mx.kasserver.com')
        ->and($report->recipients)->toHaveCount(1)
        ->and($report->recipients[0]['email'])->toBe('presse@alte-firma.example')
        ->and($report->recipients[0]['action'])->toBe('failed')
        ->and($report->recipients[0]['status'])->toBe('5.1.1')
        ->and($report->recipients[0]['diagnostic'])->toContain('User unknown')
        ->and($report->reference)->toBe('pm:4711:company:815')
        ->and($report->receivedAt?->toDateString())->toBe('2026-09-15');
});

test('processing a hard bounce suppresses the address and keeps the reference', function () {
    /** @var TestCase $this */
    $result = app(BounceMailProcessor::class)->process(bounceFixture('hard-5.1.1'));

    expect($result['folder'])->toBe(BounceMailProcessor::Processed)
        ->and($result['bounces'])->toBe(1)
        ->and(app(EmailSuppressionService::class)->isSuppressed('presse@alte-firma.example'))->toBeTrue()
        ->and(EmailBounce::query()->first()->reference)->toBe('pm:4711:company:815')
        ->and(EmailBounce::query()->first()->kind)->toBe(EmailBounceKind::Hard);

    // Zweiter Durchlauf derselben Mail (abgebrochener Lauf): nichts doppelt.
    app(BounceMailProcessor::class)->process(bounceFixture('hard-5.1.1'));
    expect(EmailBounce::query()->count())->toBe(1);
});

test('a delayed report counts as a soft bounce and lower-case field names are fine', function () {
    /** @var TestCase $this */
    $result = app(BounceMailProcessor::class)->process(bounceFixture('delayed-4.4.1'));

    expect($result['folder'])->toBe(BounceMailProcessor::Processed)
        ->and(EmailBounce::query()->first()->kind)->toBe(EmailBounceKind::Soft)
        ->and(EmailBounce::query()->first()->reference)->toBe('user:99')
        ->and(app(EmailSuppressionService::class)->isSuppressed('voll@example.test'))->toBeFalse();
});

test('a delivery confirmation blocks nobody', function () {
    /** @var TestCase $this */
    $result = app(BounceMailProcessor::class)->process(bounceFixture('delivered'));

    expect($result['folder'])->toBe(BounceMailProcessor::Ignored)
        ->and(EmailBounce::query()->count())->toBe(0);
});

test('free-text bounces are not guessed but parked for a human, auto-replies are ignored', function () {
    /** @var TestCase $this */
    $unparsed = app(BounceMailProcessor::class)->process(bounceFixture('freitext'));
    $ooo = app(BounceMailProcessor::class)->process(bounceFixture('abwesenheit'));

    expect($unparsed['folder'])->toBe(BounceMailProcessor::Unparsed)
        ->and($ooo['folder'])->toBe(BounceMailProcessor::Ignored)
        ->and(app(EmailSuppressionService::class)->isSuppressed('jemand@alter-server.example'))->toBeFalse()
        ->and(ActivityEvent::query()->where('type', ActivityType::MailSuppressed->value)->where('description', 'like', '%nicht lesbar%')->exists())->toBeTrue();
});

test('the utf-8 dsn variant of rfc 6533 is read like a classic report', function () {
    /** @var TestCase $this */
    // SmarterMail liefert `message/global-delivery-status` und die
    // Original-Header als `message/global-headers` (Bestand 15.09.2026).
    $report = app(DsnParser::class)->parse(bounceFixture('global-delivery-status'));

    expect($report)->not->toBeNull()
        ->and($report->recipients)->toHaveCount(1)
        ->and($report->recipients[0]['email'])->toBe('weiterleitung@example.net')
        ->and($report->recipients[0]['status'])->toBe('5.0.0')
        ->and($report->reference)->toBe('user:4711');

    $result = app(BounceMailProcessor::class)->process(bounceFixture('global-delivery-status'));

    expect($result['folder'])->toBe(BounceMailProcessor::Processed)
        ->and(EmailBounce::query()->first()->kind)->toBe(EmailBounceKind::Hard);
});

test('the free-text notice of our own relay is read and never mistaken for an auto-reply', function () {
    /** @var TestCase $this */
    // All-Inkl schickt „Auto-Submitted: auto-replied" mit — als Abwesenheit
    // ignoriert, wären das genau die Adressen, die nie gesperrt würden.
    expect(app(DsnParser::class)->looksLikeAutoReply(bounceFixture('kas-antispam')))->toBeFalse();

    $result = app(BounceMailProcessor::class)->process(bounceFixture('kas-antispam'));
    $suppressions = app(EmailSuppressionService::class);

    expect($result['folder'])->toBe(BounceMailProcessor::Processed)
        ->and($result['bounces'])->toBe(2)
        ->and($suppressions->isSuppressed('presse@example.net'))->toBeTrue()
        ->and($suppressions->isSuppressed('info@example.org'))->toBeTrue();
});

test('policy rejections and full mailboxes never count hard', function () {
    /** @var TestCase $this */
    // 5.7.1 „Relay access denied": die Adresse existiert, ihr Server nimmt
    // nur nichts an — protokollieren, nicht zählen.
    $result = app(BounceMailProcessor::class)->process(bounceFixture('policy-5.7.1'));

    expect($result['folder'])->toBe(BounceMailProcessor::Processed)
        ->and(EmailBounce::query()->first()->kind)->toBe(EmailBounceKind::Policy)
        ->and(EmailBounce::query()->first()->reference)->toBe('pm:99:company:7')
        ->and(app(EmailSuppressionService::class)->isSuppressed('pr@example.net'))->toBeFalse();

    $quota = str_replace(
        ['Status: 5.7.1', '554 5.7.1 <pr@example.net>: Relay access denied', '<20260915120000.ABC@'],
        ['Status: 5.2.2', '552 Requested mail action aborted: exceeded storage allocation', '<20260915120001.ABC@'],
        bounceFixture('policy-5.7.1'),
    );
    app(BounceMailProcessor::class)->process($quota);

    expect(EmailBounce::query()->count())->toBe(2)
        ->and(EmailBounce::query()->where('kind', EmailBounceKind::Soft->value)->count())->toBe(1)
        ->and(EmailBounce::query()->where('kind', EmailBounceKind::Hard->value)->count())->toBe(0);
});

test('the fetch command does nothing without a configured mailbox', function () {
    /** @var TestCase $this */
    config()->set('imap.accounts.bounces.host', null);

    $this->artisan('mail:fetch-bounces')->expectsOutputToContain('nicht konfiguriert')->assertSuccessful();
});

test('a policy rejection is logged but never counts toward suppression', function () {
    /** @var TestCase $this */
    // Vier Richtlinien-Ablehnungen: Der Schwellwert (3) darf sie nicht
    // erfassen — das Postfach kann einwandfrei existieren.
    $raw = bounceFixture('policy-5.7.1');

    foreach (range(1, 4) as $i) {
        app(BounceMailProcessor::class)->process(str_replace('<20260915120000.ABC@', '<2026091512000'.$i.'.ABC@', $raw));
    }

    expect(EmailBounce::query()->where('kind', EmailBounceKind::Policy->value)->count())->toBe(4)
        ->and(app(EmailSuppressionService::class)->isSuppressed('pr@example.net'))->toBeFalse();
});