<?php

namespace App\Services\Pagarme;

use App\Models\Client;
use Illuminate\Support\Facades\Log;
use PagarmeApiSDKLib\Authentication\BasicAuthCredentialsBuilder;
use PagarmeApiSDKLib\Models\CreateAddressRequest;
use PagarmeApiSDKLib\Models\CreatePhonesRequest;
use PagarmeApiSDKLib\Models\Builders\CreateAddressRequestBuilder;
use PagarmeApiSDKLib\Models\Builders\CreateCustomerRequestBuilder;
use PagarmeApiSDKLib\Models\Builders\CreatePhoneRequestBuilder;
use PagarmeApiSDKLib\Models\Builders\CreatePhonesRequestBuilder;
use PagarmeApiSDKLib\PagarmeApiSDKClient;
use PagarmeApiSDKLib\PagarmeApiSDKClientBuilder;

class PagarmeCustomerService
{
    private ?PagarmeApiSDKClient $client = null;

    public function createCustomerForClient(Client $client, array $data): ?string
    {
        if (!empty($client->external_customer_id)) {
            return $client->external_customer_id;
        }

        $client->loadMissing('user');

        $name = $client->user?->name ?? $data['name'] ?? 'Cliente';
        $email = $client->user?->email ?? $data['email'] ?? null;
        $document = $this->sanitizeDigits($client->document ?? $data['document'] ?? null);

        if (empty($email) || empty($document)) {
            Log::warning('Skipping customer creation because the client is missing email or document.', [
                'client_id' => $client->id,
                'user_id' => $client->user_id,
            ]);

            return null;
        }

        $address = $this->buildAddress($data);
        $phones = $this->buildPhones($client->user?->phone ?? $data['phone'] ?? null);
        $code = $client->external_customer_code ?? "client-{$client->id}";

        $customerRequest = CreateCustomerRequestBuilder::init(
            $name,
            $email,
            $document,
            $this->personType($document),
            $address,
            [
                'client_id' => (string) $client->id,
                'user_id' => (string) ($client->user_id ?? ''),
            ],
            $phones,
            $code
        )
            ->documentType($this->documentType($document))
            ->build();

        $customer = $this->client()->getCustomersController()->createCustomer(
            $customerRequest,
            $this->idempotencyKey($client->id)
        );

        $customerId = $customer->getId();
        if (!$customerId) {
            throw new \RuntimeException('Customer creation returned an empty id.');
        }

        $client->forceFill([
            'external_customer_id' => $customerId,
            'external_customer_code' => $code,
        ])->save();

        return $customerId;
    }

    private function buildAddress(array $data): CreateAddressRequest
    {
        $zipCode = $this->sanitizeDigits($data['zip_code'] ?? null);
        $street = (string) ($data['address'] ?? '');
        $number = (string) ($data['number'] ?? '0');
        $neighborhood = (string) ($data['district'] ?? '');
        $city = (string) ($data['city'] ?? '');
        $state = (string) ($data['state'] ?? '');
        $country = (string) ($data['country'] ?? 'BR');
        $complement = (string) ($data['complement'] ?? '');

        $line1Parts = array_filter([$number, $street, $neighborhood], static fn ($value) => $value !== '');
        $line1 = implode(', ', $line1Parts);
        $line2 = $complement ?: (string) ($data['instructions'] ?? '');

        return CreateAddressRequestBuilder::init(
            $street,
            $number,
            $zipCode,
            $neighborhood,
            $city,
            $state,
            $country,
            $complement,
            $line1,
            $line2
        )
            ->metadata([
                'source' => 'register-client',
            ])
            ->build();
    }

    private function buildPhones(?string $phone): CreatePhonesRequest
    {
        $digits = $this->sanitizeDigits($phone);
        $phonesBuilder = CreatePhonesRequestBuilder::init();

        if (empty($digits)) {
            return $phonesBuilder->build();
        }

        $countryCode = '55';
        $areaCode = substr($digits, 0, 2);
        $number = substr($digits, 2);

        if (strlen($digits) <= 2) {
            $areaCode = '';
            $number = $digits;
        }

        $mobilePhone = CreatePhoneRequestBuilder::init()
            ->countryCode($countryCode)
            ->areaCode($areaCode)
            ->number($number)
            ->type('mobile')
            ->build();

        return $phonesBuilder
            ->mobilePhone($mobilePhone)
            ->build();
    }

    private function documentType(string $document): string
    {
        return strlen($document) === 14 ? 'CNPJ' : 'CPF';
    }

    private function personType(string $document): string
    {
        return strlen($document) === 14 ? 'company' : 'individual';
    }

    private function sanitizeDigits(?string $value): string
    {
        return preg_replace('/\D+/', '', (string) $value) ?? '';
    }

    private function client(): PagarmeApiSDKClient
    {
        if ($this->client) {
            return $this->client;
        }

        $secretKey = config('services.pagarme.secret_key');
        if (empty($secretKey)) {
            throw new \RuntimeException('PAGARME_SECRET_KEY is not configured.');
        }

        $serviceRefererName = (string) config('services.pagarme.service_referer_name', config('app.name'));

        $this->client = PagarmeApiSDKClientBuilder::init()
            ->basicAuthCredentials(
                BasicAuthCredentialsBuilder::init($secretKey, '')
            )
            ->serviceRefererName($serviceRefererName)
            ->build();

        return $this->client;
    }

    private function idempotencyKey(int $clientId): string
    {
        return "client-{$clientId}-customer";
    }
}