<?php

declare(strict_types=1);

namespace App\Services;

use App\Models\MailwizzConfig;
use App\Models\PreregistrationPage;
use App\Models\Subscriber;
use App\Models\WeeztixConfig;
use Illuminate\Support\Facades\Log;
use RuntimeException;
use Throwable;

/**
 * Before a subscriber row is deleted, best-effort cleanup in Weeztix (coupon code) and Mailwizz (strip source tag, clear coupon field).
 * Failures are logged only; local delete must still proceed.
 */
final class CleanupSubscriberIntegrationsService
{
    public function runBeforeDelete(Subscriber $subscriber): void
    {
        $subscriber->loadMissing(['preregistrationPage.mailwizzConfig', 'preregistrationPage.weeztixConfig']);
        $page = $subscriber->preregistrationPage;
        if ($page === null) {
            return;
        }

        try {
            $this->cleanupWeeztixIfApplicable($subscriber, $page);
        } catch (Throwable $e) {
            Log::error('CleanupSubscriberIntegrations: Weeztix cleanup failed', [
                'subscriber_id' => $subscriber->id,
                'preregistration_page_id' => $page->id,
                'message' => $e->getMessage(),
            ]);
        }

        try {
            $this->cleanupMailwizzIfApplicable($subscriber, $page);
        } catch (Throwable $e) {
            Log::error('CleanupSubscriberIntegrations: Mailwizz cleanup failed', [
                'subscriber_id' => $subscriber->id,
                'preregistration_page_id' => $page->id,
                'message' => $e->getMessage(),
            ]);
        }
    }

    private function cleanupWeeztixIfApplicable(Subscriber $subscriber, PreregistrationPage $page): void
    {
        $config = $page->weeztixConfig;
        if ($config === null || ! $config->is_connected) {
            return;
        }

        $code = $subscriber->coupon_code;
        if (! is_string($code) || trim($code) === '') {
            return;
        }

        if (! $this->weeztixCanManageCodes($config)) {
            return;
        }

        $fresh = $config->fresh();
        if ($fresh === null) {
            return;
        }

        (new WeeztixService($fresh))->deleteCouponCodeByCodeString($code);
    }

    private function weeztixCanManageCodes(WeeztixConfig $config): bool
    {
        $company = $config->company_guid;
        $coupon = $config->coupon_guid;

        return is_string($company) && $company !== '' && is_string($coupon) && $coupon !== '';
    }

    private function cleanupMailwizzIfApplicable(Subscriber $subscriber, PreregistrationPage $page): void
    {
        $config = $page->mailwizzConfig;
        if ($config === null) {
            return;
        }

        if (! $this->mailwizzConfigAllowsUpdate($config)) {
            return;
        }

        $apiKey = $config->api_key;
        if (! is_string($apiKey) || $apiKey === '') {
            return;
        }

        $service = new MailwizzService($apiKey);
        $listUid = $config->list_uid;

        $search = $service->searchSubscriber($listUid, $subscriber->email);
        if ($search === null) {
            return;
        }

        $subscriberUid = $search['subscriber_uid'];
        /** @var array<string, mixed> $data */
        $data = [];

        $couponField = $config->field_coupon_code;
        if (is_string($couponField) && $couponField !== '') {
            $data[$couponField] = '';
        }

        $tagField = $config->tag_field;
        $tagValue = $config->tag_value;
        if ($tagField !== null && $tagField !== '' && $tagValue !== null && $tagValue !== '') {
            $full = $service->getSubscriber($listUid, $subscriberUid);
            if ($full === null) {
                throw new RuntimeException('Mailwizz getSubscriber returned an empty payload.');
            }
            $existingCsv = MailwizzCheckboxlistTags::extractCsvFromSubscriberResponse($full, $tagField);
            $data[$tagField] = MailwizzCheckboxlistTags::removeValueFromCsv($existingCsv, $tagValue);
        }

        if ($data === []) {
            return;
        }

        $service->updateSubscriber($listUid, $subscriberUid, $data);
    }

    private function mailwizzConfigAllowsUpdate(MailwizzConfig $config): bool
    {
        if ($config->list_uid === '' || $config->field_email === '' || $config->field_first_name === '' || $config->field_last_name === '') {
            return false;
        }

        $hasTagWork = $config->tag_field !== null && $config->tag_field !== ''
            && $config->tag_value !== null && $config->tag_value !== '';
        $hasCouponField = is_string($config->field_coupon_code) && $config->field_coupon_code !== '';

        return $hasTagWork || $hasCouponField;
    }
}