<?php

namespace App\Module\AppGame\Handler\God;

use App\Module\AppGame\Handler\BaseHandler;
use App\Module\Farm\Enums\BUFF_TYPE;
use App\Module\Farm\Services\BuffService;
use App\Module\GameItems\Services\ItemService;
use Google\Protobuf\Internal\Message;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Uraus\Kku\Request\RequestGodOpen;
use Uraus\Kku\Response\ResponseGodOpen;
use Uraus\Kku\Common\RESPONSE_CODE;
use UCore\Exception\LogicException;

/**
 * 处理神像开启请求
 */
class OpenHandler extends BaseHandler
{
    /**
     * 是否需要登录
     * @var bool
     */
    protected bool $need_login = true;

    /**
     * 处理神像开启请求
     *
     * @param RequestGodOpen $data 神像开启请求数据
     * @return ResponseGodOpen 神像开启响应
     */
    public function handle(Message $data): Message
    {
        // 创建响应对象
        $response = new ResponseGodOpen();

        try {
            // 获取请求参数
            $godId = $data->getGodId();
            $itemId = $data->getItemId();
            $userId = $this->user_id;

            // 如果客户端没有指定物品ID，则自动查找
            if (!$itemId || $itemId <= 0) {
                $itemId = $this->findGodItem($userId, $godId);
            }

            // 先进行验证，避免不必要的事务开销
            $validation = new \App\Module\Farm\Validations\GodActivationValidation([
                'user_id' => $userId,
                'god_id' => $godId,
                'item_id' => $itemId
            ]);

            // 验证数据
            $validation->validated();

            // 验证通过后，开启事务
            DB::beginTransaction();

            // 执行业务逻辑（不再需要验证）
            $result = $this->activateGodBuff($userId, $godId, $itemId);

            // 提交事务
            DB::commit();

            // 设置响应状态
            $this->response->setCode(RESPONSE_CODE::OK);
            $this->response->setMsg($result['message']);

        } catch (\Exception $e) {
            // 系统异常，需要回滚事务
            if (DB::transactionLevel() > 0) {
                DB::rollBack();
            }

            Log::error('神像激活操作异常', [
                'user_id' => $this->user_id,
                'god_id' => $godId ?? null,
                'item_id' => $itemId ?? null,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            // 重新抛出异常，交由框架处理
            throw $e;
        }

        return $response;
    }

    /**
     * 查找用户背包中具有指定神像种类的物品（备用方法）
     * 当客户端没有指定物品ID时使用此方法自动查找
     *
     * @param int $userId 用户ID
     * @param int $godId 神像ID
     * @return int 物品ID
     * @throws LogicException
     */
    private function findGodItem(int $userId, int $godId): int
    {
        // 获取用户所有物品
        $userItems = ItemService::getUserItems($userId);

        foreach ($userItems as $userItem) {
            // 检查物品是否具有神像时间属性
            $godDuration = ItemService::getItemNumericAttribute($userItem->itemId, 'god_duration_seconds');

            // 检查物品的神像种类是否匹配
            $godType = ItemService::getItemNumericAttribute($userItem->itemId, 'god_type');

            if ($godDuration > 0 && $godType === $godId) {
                return $userItem->itemId;
            }
        }

        throw new LogicException("您没有对应的神像物品");
    }

    /**
     * 激活神像buff
     *
     * @param int $userId 用户ID
     * @param int $godId 神像ID
     * @param int $itemId 物品ID
     * @return array 激活结果
     * @throws LogicException
     */
    private function activateGodBuff(int $userId, int $godId, int $itemId): array
    {
        // 获取物品的神像时间属性
        $godDurationSeconds = ItemService::getItemNumericAttribute($itemId, 'god_duration_seconds');
        $durationHours = $godDurationSeconds > 0 ? ceil($godDurationSeconds / 3600) : 24; // 转换为小时，默认24小时

        // 消耗神像物品
        ItemService::consumeItem($userId, $itemId, null, 1, [
            'source_type' => 'god_activate',
            'source_id' => $godId,
            'details' => [
                'god_id' => $godId,
                'god_name' => BUFF_TYPE::getName($godId),
                'duration_seconds' => $godDurationSeconds
            ]
        ]);

        // 激活神像加持
        $buff = BuffService::activateBuff($userId, $godId, $durationHours);

        if (!$buff) {
            throw new LogicException("神像激活失败");
        }

        // 记录日志
        Log::info('用户激活神像成功', [
            'user_id' => $userId,
            'god_id' => $godId,
            'item_id' => $itemId,
            'duration_seconds' => $godDurationSeconds,
            'duration_hours' => $durationHours,
            'expire_time' => $buff->expire_time ? $buff->expire_time->toDateTimeString() : null
        ]);

        return [
            'message' => '神像激活成功',
            'buff' => $buff
        ];
    }
}