<?php

namespace App\Module\Game\Logics;

/**
 * 扣除数据收集逻辑
 * 
 * 使用静态变量收集本次请求中的所有扣除数据
 * 区别于LastData（变化但未同步的），这里收集的是本次请求的扣除
 */
class DeductCollectorLogic
{
    /**
     * 物品扣除数据
     * 格式：[item_id => ['item_id' => int, 'instance_id' => int, 'quantity' => int]]
     *
     * @var array
     */
    private static array $itemDeducts = [];

    /**
     * 代币扣除数据
     * 格式：[coin_type => ['type' => int, 'quantity' => int]]
     *
     * @var array
     */
    private static array $coinDeducts = [];

    /**
     * 添加物品扣除
     *
     * @param int $itemId 物品ID
     * @param int $instanceId 物品实例ID
     * @param int $quantity 扣除数量
     * @return void
     */
    public static function addItemDeduct(int $itemId, int $instanceId, int $quantity): void
    {
        $key = $itemId . '_' . $instanceId;
        
        if (isset(self::$itemDeducts[$key])) {
            // 如果已存在，累加数量
            self::$itemDeducts[$key]['quantity'] += $quantity;
        } else {
            // 新增扣除记录
            self::$itemDeducts[$key] = [
                'item_id' => $itemId,
                'instance_id' => $instanceId,
                'quantity' => $quantity,
            ];
        }
    }

    /**
     * 添加代币扣除
     *
     * @param int $coinType 代币类型
     * @param int $quantity 扣除数量
     * @return void
     */
    public static function addCoinDeduct(int $coinType, int $quantity): void
    {
        if (isset(self::$coinDeducts[$coinType])) {
            // 如果已存在，累加数量
            self::$coinDeducts[$coinType]['quantity'] += $quantity;
        } else {
            // 新增扣除记录
            self::$coinDeducts[$coinType] = [
                'type' => $coinType,
                'quantity' => $quantity,
            ];
        }
    }

    /**
     * 获取本次请求的所有扣除数据
     *
     * @return array 扣除数据数组，包含items和coins
     */
    public static function getDeducts(): array
    {
        return [
            'items' => array_values(self::$itemDeducts),
            'coins' => array_values(self::$coinDeducts),
        ];
    }

    /**
     * 清空本次请求的扣除数据
     *
     * @return void
     */
    public static function clearDeducts(): void
    {
        self::$itemDeducts = [];
        self::$coinDeducts = [];
    }

    /**
     * 检查是否有扣除数据
     *
     * @return bool
     */
    public static function hasDeducts(): bool
    {
        return !empty(self::$itemDeducts) || !empty(self::$coinDeducts);
    }

    /**
     * 获取物品扣除数据
     *
     * @return array
     */
    public static function getItemDeducts(): array
    {
        return array_values(self::$itemDeducts);
    }

    /**
     * 获取代币扣除数据
     *
     * @return array
     */
    public static function getCoinDeducts(): array
    {
        return array_values(self::$coinDeducts);
    }
}