<?php

namespace App\Services\Admin\Log;

use App\Repositories\Admin\Log\MemberJoinLogRepository;
use App\Support\LegacyCrypto\CiSeedCrypto;

final class MemberJoinLogService
{
    public function __construct(
        private readonly MemberJoinLogRepository $repo,
    ) {}

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

            'gubun'      => $this->safeStr($query['gubun'] ?? '', 50),
            'error_code' => $this->safeStr($query['error_code'] ?? '', 2),

            'mem_no'     => $this->safeInt($query['mem_no'] ?? null),
            'email'      => $this->safeStr($query['email'] ?? '', 80),

            'ip4'        => $this->safeIpPrefix($query['ip4'] ?? ''),
            'ip4_c'      => $this->safeIpPrefix($query['ip4_c'] ?? ''),

            // 사용자 입력 전화번호(plain)
            'phone'      => $this->safeStr($query['phone'] ?? '', 30),
            // 검색용 encrypt 결과(정확일치)
            'phone_enc'  => null,
        ];

        // ✅ 기간 역전 방지
        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']];
            }
        }

        // ✅ 전화번호 검색: encrypt(숫자) = cell_phone (정확일치)
        $phoneDigits = preg_replace('/\D+/', '', (string)$filters['phone']) ?: '';
        if ($phoneDigits !== '' && preg_match('/^\d{10,11}$/', $phoneDigits)) {
            try {
                $seed = app(CiSeedCrypto::class);
                $filters['phone_enc'] = (string)$seed->encrypt($phoneDigits);
            } catch (\Throwable $e) {
                // encrypt 실패하면 검색조건 무시(리스트는 정상 출력)
                $filters['phone_enc'] = null;
            }
        }

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

        // ✅ 리스트 표시용 가공(복호화/포맷)
        $seed = app(CiSeedCrypto::class);

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

            [$corpLabel, $corpBadge] = $this->corpLabel((string)($r['cell_corp'] ?? 'n'));

            $phoneEnc = (string)($r['cell_phone'] ?? '');
            $phoneDigits = $this->decryptPhoneDigits($seed, $phoneEnc);
            $phoneDisplay = $this->formatPhone($phoneDigits);

            $email = trim((string)($r['email'] ?? ''));
            if ($email === '' || $email === '-') $email = '-';

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

            $items[] = array_merge($r, [
                'corp_label' => $corpLabel,
                'corp_badge' => $corpBadge,

                'phone_plain' => $phoneDigits,
                'phone_display' => ($phoneDisplay !== '' ? $phoneDisplay : ($phoneDigits !== '' ? $phoneDigits : '-')),

                'email_display' => $email,

                'mem_no_int' => $memNo,
                'mem_link' => ($memNo > 0) ? ('/members/' . $memNo) : null,
            ]);
        }

        return [
            'page' => $page,
            'items' => $items,
            'filters' => $filters,
            'corp_map' => $this->corpMapForUi(),
        ];
    }

    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 ($s === '') return null;
        if (!preg_match('/^\d{4}-\d{2}-\d{2}$/', $s)) return null;
        return $s;
    }

    private function safeIpPrefix(mixed $v): string
    {
        $s = trim((string)$v);
        if ($s === '') return '';
        // prefix 검색 용도: 숫자/점만 허용
        if (!preg_match('/^[0-9.]+$/', $s)) return '';
        return $s;
    }

    private function decryptPhoneDigits(CiSeedCrypto $seed, string $enc): string
    {
        $enc = trim($enc);
        if ($enc === '') return '';

        try {
            $plain = (string)$seed->decrypt($enc);
            $digits = preg_replace('/\D+/', '', $plain) ?: '';
            return preg_match('/^\d{10,11}$/', $digits) ? $digits : '';
        } catch (\Throwable $e) {
            return '';
        }
    }

    private function formatPhone(string $digits): string
    {
        if (!preg_match('/^\d{10,11}$/', $digits)) return '';
        if (strlen($digits) === 11) {
            return substr($digits, 0, 3) . '-' . substr($digits, 3, 4) . '-' . substr($digits, 7, 4);
        }
        return substr($digits, 0, 3) . '-' . substr($digits, 3, 3) . '-' . substr($digits, 6, 4);
    }

    private function corpLabel(string $code): array
    {
        $map = [
            '01' => ['SKT', 'badge--skt'],
            '02' => ['KT', 'badge--kt'],
            '03' => ['LGU+', 'badge--lgu'],
            '04' => ['SKT(알뜰)', 'badge--mvno'],
            '05' => ['KT(알뜰)', 'badge--mvno'],
            '06' => ['LGU+(알뜰)', 'badge--mvno'],
            'n'  => ['-', 'badge--muted'],
        ];

        return $map[$code] ?? ['-', 'badge--muted'];
    }

    private function corpMapForUi(): array
    {
        return [
            ''   => '전체',
            '01' => 'SKT',
            '02' => 'KT',
            '03' => 'LGU+',
            '04' => 'SKT(알뜰)',
            '05' => 'KT(알뜰)',
            '06' => 'LGU+(알뜰)',
        ];
    }
}