<?php

namespace App\Module\Game\Logics\ConsumeProcessors;

use App\Module\Game\Models\GameConsumeItem;
use App\Module\GameItems\Services\ItemService;
use UCore\Dto\Res;

class ItemConsume
{


    /**
     * 检查物品消耗
     *
     * @param int $userId 用户ID
     * @param GameConsumeItem $consumeItem 消耗项
     * @param float $multiplier 倍数，用于验证几倍消耗，默认为1
     * @return Res 检查结果
     */
    public static function checkItemConsume(int $userId, GameConsumeItem $consumeItem, float $multiplier = 1.0): Res
    {
        $itemId   = $consumeItem->target_id;
        $quantity = ceil($consumeItem->quantity * $multiplier); // 使用倍数计算所需数量，向上取整

        // 获取用户物品
        $userItems = ItemService::getUserItems($userId, [ 'item_id' => $itemId ]);

        // 计算用户拥有的物品总数
        $totalQuantity = 0;
        foreach ($userItems as $userItem) {
            $totalQuantity += $userItem->quantity;
        }

        // 检查数量是否足够
        if ($totalQuantity < $quantity) {
            return Res::error("物品 $itemId 数量不足，需要 {$quantity}，实际 {$totalQuantity}", [
                'item_id'  => $itemId,
                'required' => $quantity,
                'actual'   => $totalQuantity
            ]);
        }

        return Res::success('物品数量足够', [
            'item_id'  => $itemId,
            'required' => $quantity,
            'actual'   => $totalQuantity
        ]);
    }

    /**
     * 物品消耗执行
     *
     * @param int $userId
     * @param GameConsumeItem $consumeItem
     * @param string $source
     * @param int $sourceId
     * @param $multiplier
     * @return Res
     * @throws \Exception
     */
    public static function process(int $userId, GameConsumeItem $consumeItem, string $source, int $sourceId,$multiplier): Res
    {

        $itemId   = $consumeItem->target_id;
        $quantity = ceil($consumeItem->quantity * $multiplier); // 使用倍数计算实际消耗数量，向上取整

        // 消耗物品
        $result = ItemService::consumeItem($userId, $itemId, null, $quantity, [
            'source_type' => $source,
            'source_id'   => $sourceId,
            'details'     => [
                'consume_item_id'  => $consumeItem->id,
                'consume_group_id' => $consumeItem->group_id,
                'multiplier'       => $multiplier // 记录倍数信息
            ]
        ]);

        if (!$result['success']) {
            return Res::error($result['message'] ?? '物品消耗失败', [
                'item_id'  => $itemId,
                'quantity' => $quantity
            ]);
        }

        return Res::success('物品消耗成功', [
            'item_id'  => $itemId,
            'quantity' => $quantity
        ]);
    }
}