<?php

namespace App\Services\Admin\Log;

use App\Repositories\Admin\Log\AdminAuditLogRepository;

final class AdminAuditLogService
{
    public function __construct(
        private readonly AdminAuditLogRepository $repo,
    ) {}

    public function indexData(array $query = []): array
    {
        $filters = [
            'date_from'   => $this->safeDate($query['date_from'] ?? ''),
            'date_to'     => $this->safeDate($query['date_to'] ?? ''),
            'actor_q'     => $this->safeStr($query['actor_q'] ?? '', 80),
            'action'      => $this->safeStr($query['action'] ?? '', 60),
            'target_type' => $this->safeStr($query['target_type'] ?? '', 80),
            'ip'          => $this->safeStr($query['ip'] ?? '', 45),
        ];

        // ✅ 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']];
            }
        }

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

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

    public function getItem(int $id): ?array
    {
        $row = $this->repo->findOne($id);
        if (!$row) return null;

        $beforeRaw = $row['before_json'] ?? null;
        $afterRaw  = $row['after_json'] ?? null;

        return [
            'id' => (int)($row['id'] ?? 0),

            'actor_admin_user_id' => (int)($row['actor_admin_user_id'] ?? 0),
            'actor_email' => (string)($row['actor_email'] ?? ''),
            'actor_name'  => (string)($row['actor_name'] ?? ''),

            'action' => (string)($row['action'] ?? ''),
            'target_type' => (string)($row['target_type'] ?? ''),
            'target_id' => (int)($row['target_id'] ?? 0),

            'ip' => (string)($row['ip'] ?? ''),
            'created_at' => (string)($row['created_at'] ?? ''),

            'user_agent' => (string)($row['user_agent'] ?? ''),

            // ✅ pretty 출력 (모달에서 바로 textContent로 넣기 좋게)
            'before_pretty' => $this->prettyJson($beforeRaw),
            'after_pretty'  => $this->prettyJson($afterRaw),

            // 원문도 필요하면 남겨둠
            'before_raw' => $beforeRaw,
            'after_raw'  => $afterRaw,
        ];
    }

    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 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 prettyJson(?string $raw): string
    {
        $raw = $raw !== null ? trim((string)$raw) : '';
        if ($raw === '') return '-';

        $decoded = json_decode($raw, true);
        if (!is_array($decoded) && !is_object($decoded)) {
            // 깨진 JSON이면 원문 출력
            return $raw;
        }

        return json_encode(
            $decoded,
            JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES
        ) ?: $raw;
    }
}