<?php

namespace App\Integrations\Whmcs\Transformers;

use App\Integrations\Whmcs\DTOs\ClientData;
use Illuminate\Support\Facades\DB;

class ClientTransformer
{
    /** @var array<string, int>|null fullname => user id, cached for the process lifetime */
    private static ?array $salerIdsByName = null;

    /**
     * Map a raw `tblclients` row (array or stdClass) to a ClientData DTO.
     */
    public function transform(array|object $row): ClientData
    {
        $row = (array) $row;

        $fullname = trim(($row['firstname'] ?? '') . ' ' . ($row['lastname'] ?? ''));
        if ($fullname === '') {
            $fullname = $row['companyname'] ?: null;
        }

        return new ClientData(
            uuid: $row['uuid'],
            fullname: $fullname,
            company: $row['companyname'] ?: null,
            address: trim(($row['address1'] ?? '') . ', ' . ($row['address2'] ?? ''), ', ') ?: null,
            state: $row['state'] ?: null,
            city: $row['city'] ?: null,
            // ponytail: WHMCS repurposes the `postcode` column to store the salesperson's fullname
            saler: $this->resolveSalerId($row['postcode'] ?? null),
            country: $row['country'] ?: null,
            phone: $this->formatPhone($row['phonenumber'] ?? null),
            email: $row['email'] ? strtolower($row['email']) : null,
            // ponytail: WHMCS hashes are not Laravel bcrypt, copied as-is; customer must reset password to log into portal
            password: $row['password'] ?: null,
            note: $row['notes'] ?: null,
            credit: (int) round((float) $row['credit']),
            status: $row['status'] === 'Active' ? 1 : 0,
            emailMarketing: ((int) ($row['emailoptout'] ?? 0)) === 1 ? 0 : 1,
            createdAt: $row['created_at'] ?: $row['datecreated'] ?: null,
            updatedAt: $row['updated_at'] ?: $row['datecreated'] ?: null,
        );
    }

    private function resolveSalerId(?string $fullname): ?int
    {
        if (! $fullname) {
            return null;
        }

        self::$salerIdsByName ??= DB::table('user')->pluck('id', 'fullname')->all();

        return self::$salerIdsByName[$fullname] ?? null;
    }

    /**
     * "+84.93 613 68 14" -> "0936136814"; other country codes keep their digits as-is (e.g. "+62..." -> "62...").
     */
    private function formatPhone(?string $raw): ?string
    {
        if (! $raw) {
            return null;
        }

        $digits = preg_replace('/\D+/', '', $raw);

        if (str_starts_with($digits, '84')) {
            $digits = '0' . substr($digits, 2);
        }

        return $digits ?: null;
    }
}