<?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 WireGateway
{
    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 $buyer): array
    {
        $c = $this->cfg->wiretransfer();
        $userAgent = $isMobile ? 'MW' : 'PC';

        // wire 라우트 네이밍은 web.php 그대로 사용
        $returnUrl = route('wire.return', ['a' => $attemptToken], true);
        $cancelUrl = route('web.payments.danal.cancel', ['a' => $attemptToken], true);
        $notiUrl   = route('wire.noti', [], true);

        $req = [
            'TXTYPE' => 'AUTH',
            'SERVICETYPE' => 'WIRETRANSFER',

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

            'USERNAME' => (string)($buyer['user_name'] ?? ''),
            'USERID' => (string)($buyer['user_id'] ?? (string)$order->mem_no),
            'USEREMAIL' => (string)($buyer['user_email'] ?? ''),
            'USERPHONE' => (string)($buyer['user_phone'] ?? ''),
            'USERAGENT' => $userAgent,

            'RETURNURL' => $returnUrl,
            'CANCELURL' => $cancelUrl,

            'ISNOTI' => (string)($c['is_noti'] ?? 'Y'),
            'NOTIURL' => $notiUrl,

            // NOTI에서 token 추출(권장)
            'BYPASSVALUE' => 'AT=' . $attemptToken,
        ];

        \Log::info('danal_wire_auth_req', [
            'cpid' => $c['cpid'] ?? null,
            'key_len' => isset($c['key']) ? strlen((string)$c['key']) : null,
            'iv_len'  => isset($c['iv']) ? strlen((string)$c['iv']) : null,
            'req' => $req,
        ]);

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

        $params = ['STARTPARAMS' => (string)($res['STARTPARAMS'] ?? '')];
        if (!empty($c['ci_url'])) $params['CIURL'] = (string)$c['ci_url'];
        if (!empty($c['color']))  $params['COLOR'] = (string)$c['color'];

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

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

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

        $req = [
            'TXTYPE' => 'BILL',
            'SERVICETYPE' => 'WIRETRANSFER',
            'TID' => $tid,
            // AUTH 금액과 반드시 동일
            'AMOUNT' => (string)$order->pay_money,
        ];

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

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

    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';
    }
}