<?php
namespace App\Models;

use Core\Model;

class Product extends Model
{
    protected $table = 'products';
    protected $orderBy = 'sort_order';

    public function byCategory(int $catId): array
    {
        return $this->whereAll('category_id', $catId);
    }
    public function featured(int $limit = 6): array
    {
        // V0.9.1：改用 whereLimit('status',1,$limit)，MySQL 下走带 LIMIT 的索引查询，
        // 不再 SELECT * 全表拉回再 array_filter（原写法每次请求都全表扫描）。
        return $this->whereLimit('status', 1, $limit);
    }
    /**
     * V0.9.4：产品列表分页。仅取 status=1 的活跃商品，按 $orderBy 排序，带 LIMIT/OFFSET；
     * 同时返回总数用于翻页。避免每次列表请求都 SELECT * 全表拉回再 array_filter（原写法随 SKU 增长变重）。
     * 文件模式回退为全表过滤 + array_slice。
     * @return array{items:array,total:int}
     */
    public function listing(int $page, int $perPage, ?int $catId = null): array
    {
        $page = max(1, $page);
        $perPage = max(1, $perPage);
        $offset = ($page - 1) * $perPage;
        if (\Core\Db::driver() === 'mysql') {
            $where = 'WHERE status = 1';
            $args = [];
            if ($catId !== null) { $where .= ' AND category_id = ?'; $args[] = $catId; }
            $items = \Core\Db::query(
                "SELECT * FROM `{$this->table}` {$where} ORDER BY `{$this->orderBy}` ASC LIMIT ? OFFSET ?",
                array_merge($args, [$perPage, $offset])
            )->fetchAll();
            $total = (int) \Core\Db::query("SELECT COUNT(*) FROM `{$this->table}` {$where}", $args)->fetchColumn();
            return ['items' => $items, 'total' => $total];
        }
        // 文件模式兜底
        $all = array_filter($this->all(), fn($p) => ($p['status'] ?? 1) == 1);
        if ($catId !== null) $all = array_filter($all, fn($p) => ($p['category_id'] ?? 0) == $catId);
        $all = array_values($all);
        return ['items' => array_slice($all, $offset, $perPage), 'total' => count($all)];
    }
    public function specsArray($p): array
    {
        $s = $p['specs'] ?? '';
        if (is_array($s)) return $s;
        $dec = json_decode((string)$s, true);
        return is_array($dec) ? $dec : [];
    }
    public function galleryArray($p): array
    {
        $g = $p['gallery'] ?? '';
        if (is_array($g)) return $g;
        $dec = json_decode((string)$g, true);
        return is_array($dec) ? $g : [];
    }
}