<?php

namespace App\Providers\Danal\Gateways;

use App\Models\Payments\GcPinOrder;
use App\Providers\Danal\Clients\DanalCpcgiClient;
use App\Providers\Danal\DanalConfig;
use App\Support\Danal\EucKr;

final class VactGateway
{
    public function __construct(
        private readonly DanalConfig $cfg,
        private readonly DanalCpcgiClient $client,
        private readonly EucKr $euc,
    ) {}

    public function auth(GcPinOrder $order, string $attemptToken, bool $isMobile): array
    {
        $c = $this->cfg->vact();

        $userAgent = $isMobile ? 'MW' : 'PC';

        $returnUrl = route('web.payments.danal.vact.return', ['a' => $attemptToken], true);
        $cancelUrl = route('web.payments.danal.cancel', ['a' => $attemptToken], true);
        $notiUrl   = route('web.payments.danal.vact.noti', [], true);

        $req = [
            'CPID' => (string)$c['cpid'],
            'SUBCPID' => '',
            'ACCOUNTHOLDER' => (string)$c['holder'],
            'EXPIREDATE' => now()->addHours(23)->format('Ymd'),

            'ORDERID' => $order->oid,
            'ITEMNAME' => $this->safeItemName($this->orderTitle($order)),
            'AMOUNT' => (string)$order->pay_money,
            'ISCASHRECEIPTUI' => 'N',

            'USERNAME' => '',
            'USERID' => (string)$order->mem_no,
            'USEREMAIL' => '',
            'USERPHONE' => '',
            'USERAGENT' => $userAgent,

            'TXTYPE' => 'AUTH',
            'SERVICETYPE' => 'DANALVACCOUNT',

            'RETURNURL' => $returnUrl,
            'NOTIURL' => $notiUrl,
            'CANCELURL' => $cancelUrl,
            'BYPASSVALUE' => 'AT=' . $attemptToken,
        ];

        $res = $this->client->call($c['url'], $c['cpid'], $req, $c['key'], $c['iv']);

        return [
            'req' => $req,
            'res' => $res,
            'start' => [
                'actionUrl' => (string)($res['STARTURL'] ?? ''),
                'params' => ['STARTPARAMS' => (string)($res['STARTPARAMS'] ?? '')],
                'acceptCharset' => 'EUC-KR',
            ],
        ];
    }

    public function decryptReturn(string $returnParams): array
    {
        $c = $this->cfg->vact();
        return $this->client->decryptReturnParams($returnParams, $c['key'], $c['iv']);
    }

    public function issue(GcPinOrder $order, string $tid): array
    {
        $c = $this->cfg->vact();

        $req = [
            'CPID' => (string)$c['cpid'],
            'TID' => $tid,
            'AMOUNT' => (string)$order->pay_money,
            'TXTYPE' => 'ISSUEVACCOUNT',
            'SERVICETYPE' => 'DANALVACCOUNT',
        ];

        $res = $this->client->call($c['url'], $c['cpid'], $req, $c['key'], $c['iv']);
        return ['req' => $req, 'res' => $res];
    }

    private function orderTitle(GcPinOrder $order): string
    {
        $items = $order->items()->limit(2)->get();
        if ($items->count() === 0) return '상품권';
        if ($items->count() === 1) return (string)$items[0]->item_name;
        return (string)$items[0]->item_name . ' 외';
    }

    private function safeItemName(string $s): string
    {
        $s = str_replace(["&","'","\"","\\","<",">","|","\r","\n","," , "+"], " ", $s);
        return trim(preg_replace('/\s+/', ' ', $s)) ?: '상품권';
    }
}