<?php

namespace App\Module\AppGame\Handler\Land;

use App\Module\AppGame\Handler\BaseHandler;
use App\Module\Farm\Services\CropService;
use App\Module\Farm\Validations\CropRemoveValidation;
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\RequestLandRemoveCrop;
use Uraus\Kku\Response\ResponseLandRemoveCrop;
use UCore\Exception\LogicException;

/**
 * 处理铲除作物操作请求
 * RemoveCrop
 */
class RemoveCropHandler extends BaseHandler
{
    /**
     * 是否需要登录
     * @var bool
     */
    protected bool $need_login = true;

    /**
     * 处理铲除作物操作请求
     *
     * @param RequestLandRemoveCrop $data 铲除作物操作请求数据
     * @return ResponseLandRemoveCrop 铲除作物操作响应
     */
    public function handle(Message $data): Message
    {
        // 创建响应对象
        $response = new ResponseLandRemoveCrop();
        // 获取请求参数
        $landId = $data->getLandId();
        $toolItemId = $data->getItemId() ?? 0; // 铲除工具ID，可选
        $userId = $this->user_id;

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

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

        try {


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

            // 调用铲除作物服务
            $result = CropService::removeCrop($userId, $landId);
            if (!$result['success']) {
                throw new LogicException("铲除作物失败，请检查土地状态");
            }

            // 如果使用了工具，消耗工具
            if ($toolItemId > 0) {
                ItemService::consumeItem($userId, $toolItemId, null, 1, [
                    'source_type' => 'land_remove_crop',
                    'source_id' => $landId,
                    'details' => ['land_id' => $landId]
                ]);
            }

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

            // 如果土地状态发生变更，触发土地状态变更事件（在事务外）
            if ($result['status_changed']) {
                event(new \App\Module\Farm\Events\LandStatusChangedEvent(
                    $userId,
                    $landId,
                    $result['old_status'],
                    $result['new_status']
                ));
            }

            Log::info('用户铲除作物成功', [
                'user_id' => $userId,
                'land_id' => $landId,
                'tool_item_id' => $toolItemId,
                'status_changed' => $result['status_changed'],
                'old_status' => $result['old_status'],
                'new_status' => $result['new_status']
            ]);

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

            $this->response->setCode(500);
            $this->response->setMsg('系统错误，请稍后再试');

            Log::error('铲除作物操作异常', [
                'user_id' => $userId ?? null,
                'land_id' => $landId ?? null,
                'tool_item_id' => $toolItemId ?? null,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);
        }

        return $response;
    }
}