<?php

namespace App\Module\Game\Dtos;

/**
 * 物品变更临时数据DTO
 * 
 * 用于存储和传输物品变更的临时数据
 */
class ItemChangeTempDto
{
    /**
     * 物品ID
     *
     * @var int
     */
    public int $itemId;

    /**
     * 物品实例ID（单独属性物品）
     *
     * @var int|null
     */
    public ?int $instanceId;

    /**
     * 旧数量
     *
     * @var int
     */
    public int $oldQuantity;

    /**
     * 新数量
     *
     * @var int
     */
    public int $newQuantity;

    /**
     * 变化量
     *
     * @var int
     */
    public int $changeAmount;

    /**
     * 用户物品记录ID
     *
     * @var int
     */
    public int $userItemId;

    /**
     * 旧冻结状态
     *
     * @var bool|null
     */
    public ?bool $oldFrozenStatus;

    /**
     * 新冻结状态
     *
     * @var bool|null
     */
    public ?bool $newFrozenStatus;

    /**
     * 更新时间戳
     *
     * @var int
     */
    public int $updatedAt;

    /**
     * 从数组创建DTO对象
     *
     * @param array $data 物品变更数据数组
     * @return self
     */
    public static function fromArray(array $data): self
    {
        $dto = new self();
        $dto->itemId = $data['item_id'];
        $dto->instanceId = $data['instance_id'];
        $dto->oldQuantity = $data['old_quantity'];
        $dto->newQuantity = $data['new_quantity'];
        $dto->changeAmount = $data['change_amount'];
        $dto->userItemId = $data['user_item_id'];
        $dto->oldFrozenStatus = $data['old_frozen_status'] ?? null;
        $dto->newFrozenStatus = $data['new_frozen_status'] ?? null;
        $dto->updatedAt = $data['updated_at'];
        return $dto;
    }

    /**
     * 转换为数组
     *
     * @return array
     */
    public function toArray(): array
    {
        return [
            'item_id' => $this->itemId,
            'instance_id' => $this->instanceId,
            'old_quantity' => $this->oldQuantity,
            'new_quantity' => $this->newQuantity,
            'change_amount' => $this->changeAmount,
            'user_item_id' => $this->userItemId,
            'old_frozen_status' => $this->oldFrozenStatus,
            'new_frozen_status' => $this->newFrozenStatus,
            'updated_at' => $this->updatedAt,
        ];
    }
}