<?php

namespace App\Module\Mex\AdminControllers\Helper;

use Dcat\Admin\Grid;
use UCore\DcatAdmin\GridHelper as UGridHelper;

/**
 * Mex模块Grid助手类
 *
 * 继承UCore的GridHelper，提供Mex模块特有的Grid列配置方法
 */
class GridHelper extends UGridHelper
{

    /**
     * 用户ID列，带链接
     */
    public function columnUserId($field = 'user_id', $label = '用户ID')
    {
        return $this->grid->column($field, $label)->link(function ($value) {
            return admin_url("users/{$value}");
        });
    }

    /**
     * 商品ID列，带链接
     */
    public function columnItemId($field = 'item_id', $label = '商品ID')
    {
        return $this->grid->column($field, $label)->link(function ($value) {
            return admin_url("game-items/{$value}");
        });
    }

    /**
     * 订单ID列，带链接
     */
    public function columnOrderId($field, $label)
    {
        return $this->grid->column($field, $label)->link(function ($value) {
            return $value ? admin_url("mex-orders/{$value}") : '-';
        });
    }

    /**
     * 价格列，格式化显示
     */
    public function columnPrice($field = 'price', $label = '价格', $decimals = 5)
    {
        return $this->grid->column($field, $label)->display(function ($value) use ($decimals) {
            return number_format($value, $decimals);
        });
    }

    /**
     * 金额列，格式化显示
     */
    public function columnAmount($field, $label, $decimals = 5)
    {
        return $this->grid->column($field, $label)->display(function ($value) use ($decimals) {
            return $value ? number_format($value, $decimals) : '-';
        });
    }

    /**
     * 数量列，格式化显示
     */
    public function columnQuantity($field = 'quantity', $label = '数量')
    {
        return $this->grid->column($field, $label)->display(function ($value) {
            return number_format($value);
        });
    }


    /**
     * 平均价格计算列（根据金额和数量字段计算）
     */
    public function columnAveragePrice($amountField, $quantityField, $label)
    {
        return $this->grid->column($label)->display(function () use ($amountField, $quantityField) {
            $amount = $this->{$amountField};
            $quantity = $this->{$quantityField};

            if ($quantity > 0) {
                $avgPrice = bcdiv($amount, $quantity, 5);
                return number_format($avgPrice, 5);
            }
            return '-';
        });
    }

    /**
     * 净值计算列（正值减去负值）
     */
    public function columnNetValue($positiveField, $negativeField, $label, $decimals = 5)
    {
        return $this->grid->column($label)->display(function () use ($positiveField, $negativeField, $decimals) {
            $positive = $this->{$positiveField};
            $negative = $this->{$negativeField};

            if (is_numeric($positive) && is_numeric($negative)) {
                $net = bcsub($positive, $negative, $decimals);
                return number_format($net, $decimals);
            }
            return '-';
        });
    }
}