<?php

namespace App\Module\AppGame\Handler\Land;

use App\Module\AppGame\Handler\BaseHandler;
use App\Module\Farm\Services\LandService;
use App\Module\Farm\Validations\LandUpgradeValidation;
use Google\Protobuf\Internal\Message;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;
use Uraus\Kku\Request\RequestLandUp;
use Uraus\Kku\Response\ResponseLandUp;
use UCore\Exception\LogicException;

/**
 * 处理土地升级请求
 */
class UpHandler extends BaseHandler
{

    /**
     * 是否需要登录
     *
     * @var bool
     */
    protected bool $need_login = true;

    /**
     * 处理土地升级请求
     *
     * @param RequestLandUp $data 土地升级请求数据
     * @return ResponseLandUp 土地升级响应
     */
    public function handle(Message $data): Message
    {
        // 创建响应对象
        $response = new ResponseLandUp();

        // 获取请求参数
        $landId = $data->getLandId();
        $userId = $this->user_id;

        // 先进行验证，避免不必要的事务开销
        $validation = new LandUpgradeValidation([
                                                    'user_id' => $userId,
                                                    'land_id' => $landId
                                                ]);

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

        // 从验证结果中获取升级配置和土地信息
        $upgradeConfig = $validation->upgrade_config;
        $land          = $validation->land;
        $targetType    = $upgradeConfig->to_type_id;

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

            // 执行业务逻辑（不再需要验证）
            $result = LandService::upgradeLand($userId, $landId, $targetType);

            if (!$result) {
                throw new LogicException("升级土地失败");
            }

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

            // 记录成功日志
            Log::info('用户土地升级成功', [
                'user_id'  => $userId,
                'land_id'  => $landId,
                'old_type' => $land->land_type,
                'new_type' => $targetType
            ]);

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

            Log::error('用户土地升级系统异常', [
                'user_id' => $userId,
                'land_id' => $landId ?? null,
                'error'   => $e->getMessage(),
                'trace'   => $e->getTraceAsString()
            ]);

            throw new LogicException('系统异常，请稍后重试');
        }

        return $response;
    }

}