<?php

namespace App\Module\AppGame\Handler\Land;

use App\Module\AppGame\Handler\BaseHandler;
use App\Module\Farm\Services\CropService;
use App\Module\Farm\Validations\FertilizerValidation;
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\RequestLandFertilizer;
use Uraus\Kku\Response\ResponseLandFertilizer;
use UCore\Exception\LogicException;

/**
 * 处理施肥操作请求
 */
class FertilizerHandler extends BaseHandler
{

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

    /**
     * 处理施肥操作请求
     *
     * @param RequestLandFertilizer $data 施肥操作请求数据
     * @return Message 施肥操作响应
     */
    public function handle(Message $data): Message
    {
        // 创建响应对象
        $response = new ResponseLandFertilizer();

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

        Log::info('施肥操作开始', [
            'user_id' => $userId,
            'land_id' => $landId,
            'item_id' => $itemId,
        ]);

        // 先进行验证，避免不必要的事务开销
        Log::info('FertilizerHandler: 开始验证', [
            'user_id' => $userId,
            'land_id' => $landId,
            'item_id' => $itemId,
        ]);

        $validationData = [
            'user_id' => $userId,
            'land_id' => $landId,
            'item_id' => $itemId,
        ];

        $validation = new FertilizerValidation($validationData);
        $validation->validated();  // 这个方法会在验证失败时抛出异常

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

            // 从验证结果中获取数据，避免重复查询
            $cropGrowthTime = $validation->crop_growth_time;
            $crop = $validation->crop; // 从验证结果中获取作物对象
            $cropId = $crop->id; // 获取作物ID

            Log::info('FertilizerHandler: 验证通过，获取到作物信息', [
                'user_id' => $userId,
                'land_id' => $landId,
                'crop_id' => $cropId,
                'crop_growth_time' => $cropGrowthTime,
            ]);

            // 使用肥料（直接传入作物ID）
            $result = CropService::useFertilizer($cropId, $cropGrowthTime);
            if ($result->error) {
                throw new LogicException("施肥失败：" . $result->message);
            }

            // 消耗物品
            ItemService::consumeItem($userId, $itemId, null, 1, [
                'source_type' => 'land_fertilizer',
                'source_id'   => $landId,
                'details'     => ['land_id' => $landId, 'crop_id' => $cropId]
            ]);

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

            Log::info('施肥操作成功', [
                'user_id' => $userId,
                'land_id' => $landId,
                'item_id' => $itemId,
                'crop_id' => $cropId,
                'crop_growth_time' => $cropGrowthTime,
            ]);

            // 更新作物生长阶段（在事务外执行）
            CropService::updateGrowthStage($cropId);

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

            Log::error('施肥操作异常', [
                'user_id' => $userId,
                'land_id' => $landId,
                'item_id' => $itemId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

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

        return $response;
    }

}