<?php

namespace App\Module\Farm\Logics;

use App\Module\Farm\Enums\BUFF_TYPE;
use App\Module\Farm\Events\BuffActivatedEvent;
use App\Module\Farm\Models\FarmGodBuff;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Log;

/**
 * 神灵加持逻辑
 */
class BuffLogic
{
    /**
     * 获取用户的所有神灵加持
     *
     * @param int $userId
     * @return Collection
     */
    public function getUserBuffs(int $userId): Collection
    {
        try {
            return FarmGodBuff::where('user_id', $userId)
                ->orderBy('buff_type')
                ->get();
        } catch (\Exception $e) {
            Log::error('获取用户神灵加持失败', [
                'user_id' => $userId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return collect();
        }
    }

    /**
     * 获取用户的有效神灵加持
     *
     * @param int $userId
     * @return Collection
     */
    public function getActiveBuffs(int $userId): Collection
    {
        try {
            return FarmGodBuff::where('user_id', $userId)
                ->where('expire_time', '>', now())
                ->orderBy('buff_type')
                ->get();
        } catch (\Exception $e) {
            Log::error('获取用户有效神灵加持失败', [
                'user_id' => $userId,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return collect();
        }
    }

    /**
     * 获取用户指定类型的神灵加持
     *
     * @param int $userId
     * @param int $buffType
     * @return FarmGodBuff|null
     */
    public function getUserBuff(int $userId, int $buffType): ?FarmGodBuff
    {
        try {
            return FarmGodBuff::where('user_id', $userId)
                ->where('buff_type', $buffType)
                ->first();
        } catch (\Exception $e) {
            Log::error('获取用户指定类型神灵加持失败', [
                'user_id' => $userId,
                'buff_type' => $buffType,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return null;
        }
    }

    /**
     * 获取用户指定类型的有效神灵加持
     *
     * @param int $userId
     * @param int $buffType
     * @return FarmGodBuff|null
     */
    public function getActiveUserBuff(int $userId, int $buffType): ?FarmGodBuff
    {
        try {
            return FarmGodBuff::where('user_id', $userId)
                ->where('buff_type', $buffType)
                ->where('expire_time', '>', now())
                ->first();
        } catch (\Exception $e) {
            Log::error('获取用户指定类型有效神灵加持失败', [
                'user_id' => $userId,
                'buff_type' => $buffType,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return null;
        }
    }

    /**
     * 激活神灵加持
     *
     * @param int $userId
     * @param int $buffType
     * @param int $durationHours
     * @return FarmGodBuff|null
     */
    public function activateBuff(int $userId, int $buffType, int $durationHours): ?FarmGodBuff
    {
        try {
            // 检查buff类型是否有效
            if (!in_array($buffType, [
                BUFF_TYPE::HARVEST_GOD->valueInt(),
                BUFF_TYPE::RAIN_GOD->valueInt(),
                BUFF_TYPE::WEED_KILLER_GOD->valueInt(),
                BUFF_TYPE::PEST_CLEANER_GOD->valueInt()
            ])) {
                throw new \Exception('无效的神灵加持类型');
            }

            // 获取当前buff
            $buff = FarmGodBuff::where('user_id', $userId)
                ->where('buff_type', $buffType)
                ->first();

            $now = now();
            $expireTime = $now->copy()->addHours($durationHours);

            if ($buff) {
                // 如果已有buff，延长时间
                if ($buff->expire_time > $now) {
                    // 如果buff未过期，在当前过期时间基础上延长
                    $expireTime = $buff->expire_time->addHours($durationHours);
                }

                $buff->expire_time = $expireTime;
                $buff->save();
            } else {
                // 创建新buff
                $buff = new FarmGodBuff();
                $buff->user_id = $userId;
                $buff->buff_type = $buffType;
                $buff->expire_time = $expireTime;
                $buff->save();
            }

            // 触发buff激活事件
            event(new BuffActivatedEvent($userId, $buff));

            Log::info('神灵加持激活成功', [
                'user_id' => $userId,
                'buff_type' => $buffType,
                'duration_hours' => $durationHours,
                'expire_time' => $expireTime->toDateTimeString()
            ]);

            return $buff;
        } catch (\Exception $e) {
            Log::error('神灵加持激活失败', [
                'user_id' => $userId,
                'buff_type' => $buffType,
                'duration_hours' => $durationHours,
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return null;
        }
    }

    /**
     * 清理过期的神灵加持
     *
     * @return int
     */
    public function clearExpiredBuffs(): int
    {
        try {
            $count = FarmGodBuff::where('expire_time', '<', now())->delete();

            Log::info('清理过期神灵加持成功', [
                'count' => $count
            ]);

            return $count;
        } catch (\Exception $e) {
            Log::error('清理过期神灵加持失败', [
                'error' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            return 0;
        }
    }
}