<?php

namespace App\Module\Farm\Logics;

use App\Module\Farm\Dtos\FarmInfoDto;
use App\Module\Farm\Events\FarmCreatedEvent;
use App\Module\Farm\Models\FarmUser;
use Illuminate\Support\Facades\Log;

/**
 * 农场基础逻辑
 */
class FarmLogic
{
    /**
     * 获取用户农场信息
     *
     * @param int $userId
     * @return FarmInfoDto|null
     */
    public function getFarmInfo(int $userId): ?FarmInfoDto
    {
        try {
            $farmUser = FarmUser::where('user_id', $userId)->first();

            if (!$farmUser) {
                return null;
            }

            return FarmInfoDto::fromModel($farmUser);
        } catch (\Exception $e) {
            Log::error('获取用户农场信息失败', [
                'user_id' => $userId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return null;
        }
    }

    /**
     * 初始化用户农场
     *
     * @param int $userId
     * @return FarmInfoDto|null
     */
    public function initializeFarm(int $userId): ?FarmInfoDto
    {
        try {
            // 检查用户是否已有农场
            $farmUser = FarmUser::where('user_id', $userId)->first();

            if ($farmUser) {
                return FarmInfoDto::fromModel($farmUser);
            }

            // 检查事务是否已开启
            \UCore\Db\Helper::check_tr();

            // 创建用户农场记录
            $farmUser = new FarmUser();
            $farmUser->user_id = $userId;
            $farmUser->house_level = 1; // 默认1级房屋
            $farmUser->last_upgrade_time = now();
            $farmUser->save();

            // 初始化土地（根据房屋等级）
            $this->initializeLands($userId, $farmUser->house_level);

            // 触发农场创建事件
            event(new FarmCreatedEvent($userId, $farmUser));

            Log::info('用户农场初始化成功', [
                'user_id' => $userId,
                'farm_id' => $farmUser->id
            ]);

            return FarmInfoDto::fromModel($farmUser);
        } catch (\Exception $e) {
            Log::error('用户农场初始化失败', [
                'user_id' => $userId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return null;
        }
    }

    /**
     * 初始化用户土地
     *
     * @param int $userId
     * @param int $houseLevel 房屋等级，默认为1
     * @return void
     */
    private function initializeLands(int $userId, int $houseLevel = 1): void
    {
        try {
            $houseLogic = new HouseLogic();
            $landLogic = new LandLogic();

            // 根据房屋等级获取可用土地数量
            $availableLands = $houseLogic->getAvailableLandsCount($houseLevel);

            if ($availableLands <= 0) {
                Log::warning('房屋等级配置的可用土地数量为0', [
                    'user_id' => $userId,
                    'house_level' => $houseLevel
                ]);
                return;
            }

            // 创建对应数量的普通土地
            for ($position = 1; $position <= $availableLands; $position++) {
                $land = $landLogic->createLand($userId, $position, 1); // 1表示普通土地

                if (!$land) {
                    Log::error('创建土地失败', [
                        'user_id' => $userId,
                        'position' => $position,
                        'house_level' => $houseLevel
                    ]);
                }
            }

            Log::info('用户土地初始化成功', [
                'user_id' => $userId,
                'house_level' => $houseLevel,
                'available_lands' => $availableLands
            ]);

        } catch (\Exception $e) {
            Log::error('初始化用户土地失败', [
                'user_id' => $userId,
                'house_level' => $houseLevel,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);
        }
    }
}