<?php

namespace App\Services\Admin\Log;

use App\Repositories\Admin\Log\MemberAccountLogRepository;

final class MemberAccountLogService
{
    public function __construct(
        private readonly MemberAccountLogRepository $repo,
    ) {}

    public function indexData(array $query = []): array
    {
        $filters = [
            'date_from' => $this->safeDate($query['date_from'] ?? ''),
            'date_to'   => $this->safeDate($query['date_to'] ?? ''),

            'mem_no'    => $this->safeInt($query['mem_no'] ?? null),
            'bank_code' => $this->safeStr($query['bank_code'] ?? '', 10),
            'status'    => $this->safeStr($query['status'] ?? '', 10), // ok/fail/200/520...

            'account'   => $this->safeStr($query['account'] ?? '', 40),
            'name'      => $this->safeStr($query['name'] ?? '', 40),
            'q'         => $this->safeStr($query['q'] ?? '', 120),
        ];

        if ($filters['date_from'] && $filters['date_to']) {
            if (strcmp($filters['date_from'], $filters['date_to']) > 0) {
                [$filters['date_from'], $filters['date_to']] = [$filters['date_to'], $filters['date_from']];
            }
        }

        $page = $this->repo->paginate($filters, 30);

        $items = [];
        foreach ($page->items() as $it) {
            $r = is_array($it) ? $it : (array)$it;

            $reqRaw = (string)($r['request_data'] ?? '');
            $resRaw = (string)($r['result_data'] ?? '');

            $req = $this->decodeJson($reqRaw);
            $res = $this->decodeJson($resRaw);

            $memNo = (int)($r['mem_no'] ?? 0);

            $account = trim((string)($req['account'] ?? ''));
            $accountMasked = $this->maskAccount($account);

            $bankCode = trim((string)($req['bank_code'] ?? ''));
            $proType  = trim((string)($req['account_protype'] ?? ''));
            $name     = trim((string)($req['mam_accountname'] ?? ''));

            $status = (int)($res['status'] ?? 0);
            $ok = ($status === 200);

            $depositor = trim((string)($res['depositor'] ?? ''));
            $errCode   = trim((string)($res['error_code'] ?? ''));
            $errMsg    = trim((string)($res['error_message'] ?? ''));

            // JSON pretty (api_key는 마스킹)
            $reqPretty = $this->prettyJson($this->maskApiKey($req), $reqRaw);
            $resPretty = $this->prettyJson($res, $resRaw);

            $items[] = array_merge($r, [
                'mem_link' => $memNo > 0 ? ('/members/' . $memNo) : null,

                'account' => $account,
                'account_masked' => $accountMasked,
                'bank_code' => $bankCode,
                'account_protype' => $proType,
                'mam_accountname' => $name,

                'status_int' => $status,
                'status_label' => $ok ? 'SUCCESS' : 'FAIL',
                'status_badge' => $ok ? 'badge--ok' : 'badge--bad',

                'depositor' => $depositor,
                'error_code' => $errCode,
                'error_message' => $errMsg,

                'request_pretty' => $reqPretty,
                'result_pretty'  => $resPretty,
            ]);
        }

        return [
            'filters' => $filters,
            'page'    => $page,
            'items'   => $items,
        ];
    }

    private function decodeJson(string $raw): array
    {
        $raw = trim($raw);
        if ($raw === '') return [];
        $arr = json_decode($raw, true);
        return is_array($arr) ? $arr : [];
    }

    private function prettyJson(array $arr, string $fallbackRaw): string
    {
        if (!empty($arr)) {
            return (string)json_encode($arr, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES);
        }
        return $fallbackRaw;
    }

    private function maskApiKey(array $req): array
    {
        if (!isset($req['api_key'])) return $req;

        $v = (string)$req['api_key'];
        $v = trim($v);
        if ($v === '') return $req;

        // 앞 4 + ... + 뒤 4
        $head = mb_substr($v, 0, 4);
        $tail = mb_substr($v, -4);
        $req['api_key'] = $head . '…' . $tail;

        return $req;
    }

    private function maskAccount(string $account): string
    {
        $s = trim($account);
        if ($s === '') return '';

        $len = mb_strlen($s);
        if ($len <= 4) return $s;

        return str_repeat('*', max(0, $len - 4)) . mb_substr($s, -4);
    }

    private function safeStr(mixed $v, int $max): string
    {
        $s = trim((string)$v);
        if ($s === '') return '';
        if (mb_strlen($s) > $max) $s = mb_substr($s, 0, $max);
        return $s;
    }

    private function safeInt(mixed $v): ?int
    {
        if ($v === null || $v === '') return null;
        if (!is_numeric($v)) return null;
        $n = (int)$v;
        return $n >= 0 ? $n : null;
    }

    private function safeDate(mixed $v): ?string
    {
        $s = trim((string)$v);
        if ($s === '') return null;
        return preg_match('/^\d{4}-\d{2}-\d{2}$/', $s) ? $s : null;
    }
}