<?php

namespace App\Module\Activity\Logics;

use App\Module\Activity\Dtos\ActivityConfigDto;
use App\Module\Activity\Dtos\ActivityParticipationDto;
use App\Module\Activity\Enums\ACTIVITY_STATUS;
use App\Module\Activity\Enums\PARTICIPATION_STATUS;
use App\Module\Activity\Enums\REWARD_STATUS;
use App\Module\Activity\Events\ActivityCompletedEvent;
use App\Module\Activity\Events\ActivityProgressUpdatedEvent;
use App\Module\Activity\Events\ActivityRewardClaimedEvent;
use App\Module\Activity\Events\UserParticipatedEvent;
use App\Module\Activity\Models\ActivityConfig;
use App\Module\Activity\Models\ActivityCondition;
use App\Module\Activity\Models\ActivityParticipation;
use App\Module\Activity\Models\UserActivityData;
use App\Module\Game\Enums\REWARD_SOURCE_TYPE;
use Exception;
use Illuminate\Support\Facades\Event;
use Illuminate\Support\Facades\Log;

/**
 * 活动逻辑类
 */
class ActivityLogic
{
    /**
     * 获取活动详情
     *
     * @param int $activityId 活动ID
     * @param bool $withConditions 是否包含条件
     * @return ActivityConfigDto|null
     */
    public function getActivityDetail(int $activityId, bool $withConditions = false): ?ActivityConfigDto
    {
        $query = ActivityConfig::query();

        if ($withConditions) {
            $query->with('conditions');
        }

        $activity = $query->find($activityId);

        if (!$activity) {
            return null;
        }

        return ActivityConfigDto::fromModel($activity, $withConditions);
    }

    /**
     * 获取用户可参与的活动列表
     *
     * @param int $userId 用户ID
     * @return array
     */
    public function getUserAvailableActivities(int $userId): array
    {
        // 获取进行中的活动
        $activities = ActivityConfig::where('status', ACTIVITY_STATUS::IN_PROGRESS)
            ->where('start_time', '<=', now())
            ->where('end_time', '>=', now())
            ->orderBy('display_order', 'desc')
            ->get();

        $result = [];

        foreach ($activities as $activity) {
            // 检查用户是否已参与且完成或失败
            $participation = ActivityParticipation::where('user_id', $userId)
                ->where('activity_id', $activity->id)
                ->whereIn('completion_status', [PARTICIPATION_STATUS::COMPLETED, PARTICIPATION_STATUS::FAILED])
                ->first();

            // 如果用户已完成或失败，则跳过
            if ($participation) {
                continue;
            }

            // 检查参与条件
            if ($this->checkParticipationConditions($userId, $activity->id)) {
                $result[] = ActivityConfigDto::fromModel($activity);
            }
        }

        return $result;
    }

    /**
     * 参与活动
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return ActivityParticipationDto
     * @throws Exception
     */
    public function participateActivity(int $userId, int $activityId): ActivityParticipationDto
    {
        // 获取活动信息
        $activity = ActivityConfig::findOrFail($activityId);

        // 检查活动状态
        if ($activity->status !== ACTIVITY_STATUS::IN_PROGRESS) {
            throw new Exception('活动未开始或已结束');
        }

        // 检查活动时间
        $now = now();
        if ($activity->start_time > $now || $activity->end_time < $now) {
            throw new Exception('不在活动时间范围内');
        }

        // 检查用户是否已参与且完成或失败
        $existingParticipation = ActivityParticipation::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->whereIn('completion_status', [PARTICIPATION_STATUS::COMPLETED, PARTICIPATION_STATUS::FAILED])
            ->first();

        if ($existingParticipation) {
            throw new Exception('您已完成或失败此活动，无法再次参与');
        }

        // 检查参与条件
        if (!$this->checkParticipationConditions($userId, $activityId)) {
            throw new Exception('不满足活动参与条件');
        }

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

        // 查找或创建参与记录
        $participation = ActivityParticipation::firstOrNew([
            'user_id' => $userId,
            'activity_id' => $activityId,
        ]);

        $isNewParticipation = !$participation->exists;

        // 设置参与记录属性
        $participation->participate_time = $now;
        $participation->reward_status = REWARD_STATUS::NOT_CLAIMED;
        $participation->completion_status = PARTICIPATION_STATUS::IN_PROGRESS;
        $participation->save();

        // 创建或更新用户活动数据
        $userData = UserActivityData::firstOrNew([
            'user_id' => $userId,
            'activity_id' => $activityId,
        ]);

        if (!$userData->exists) {
            $userData->progress = 0;
            $userData->progress_data = [];
        }

        $userData->last_update = $now;
        $userData->save();

        // 如果是新参与，触发用户参与活动事件
        if ($isNewParticipation) {
            Event::dispatch(new UserParticipatedEvent($userId, $activityId));
        }

        // 返回参与记录DTO
        return ActivityParticipationDto::fromModel($participation);
    }

    /**
     * 更新活动进度
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @param int $progress 进度值
     * @param array|null $progressData 进度数据
     * @return bool
     * @throws Exception
     */
    public function updateActivityProgress(int $userId, int $activityId, int $progress, ?array $progressData = null): bool
    {
        // 获取用户参与记录
        $participation = ActivityParticipation::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();

        if (!$participation) {
            throw new Exception('用户未参与此活动');
        }

        if ($participation->completion_status !== PARTICIPATION_STATUS::IN_PROGRESS) {
            throw new Exception('活动已完成或失败，无法更新进度');
        }

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

        // 更新用户活动数据
        $userData = UserActivityData::firstOrNew([
            'user_id' => $userId,
            'activity_id' => $activityId,
        ]);

        $oldProgress = $userData->progress;

        $userData->progress = $progress;
        if ($progressData !== null) {
            $userData->progress_data = $progressData;
        }
        $userData->last_update = now();
        $userData->save();

        // 检查是否满足完成条件
        $isCompleted = $this->checkCompletionConditions($userId, $activityId);

        if ($isCompleted) {
            // 更新参与记录为已完成
            $participation->completion_status = PARTICIPATION_STATUS::COMPLETED;
            $participation->completion_time = now();
            $participation->save();

            // 触发活动完成事件
            Event::dispatch(new ActivityCompletedEvent($userId, $activityId));
        }

        // 触发活动进度更新事件
        Event::dispatch(new ActivityProgressUpdatedEvent($userId, $activityId, $oldProgress, $progress));

        return true;
    }

    /**
     * 领取活动奖励
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return bool
     * @throws Exception
     */
    public function claimActivityReward(int $userId, int $activityId): bool
    {
        // 获取用户参与记录
        $participation = ActivityParticipation::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();

        if (!$participation) {
            throw new Exception('用户未参与此活动');
        }

        if ($participation->completion_status !== PARTICIPATION_STATUS::COMPLETED) {
            throw new Exception('活动未完成，无法领取奖励');
        }

        if ($participation->reward_status === REWARD_STATUS::CLAIMED) {
            throw new Exception('奖励已领取');
        }

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

        // 获取活动信息
        $activity = ActivityConfig::findOrFail($activityId);

        // 更新参与记录为已领取
        $participation->reward_status = REWARD_STATUS::CLAIMED;
        $participation->save();

        // 发放奖励
        $rewardResult = $this->grantActivityReward($userId, $activity);

        // 触发奖励领取事件
        Event::dispatch(new ActivityRewardClaimedEvent($userId, $activityId, $rewardResult));

        return true;
    }

    /**
     * 检查参与条件
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return bool
     */
    private function checkParticipationConditions(int $userId, int $activityId): bool
    {
        // 获取活动的参与条件
        $conditions = ActivityCondition::where('activity_id', $activityId)
            ->where('is_participation_condition', true)
            ->get();

        // 如果没有参与条件，则默认可以参与
        if ($conditions->isEmpty()) {
            return true;
        }

        // 检查每个条件
        foreach ($conditions as $condition) {
            // 根据条件类型进行检查
            $conditionChecker = new ConditionLogic();
            if (!$conditionChecker->checkCondition($userId, $condition)) {
                return false;
            }
        }

        return true;
    }

    /**
     * 检查完成条件
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return bool
     */
    private function checkCompletionConditions(int $userId, int $activityId): bool
    {
        // 获取活动的完成条件
        $conditions = ActivityCondition::where('activity_id', $activityId)
            ->where('is_completion_condition', true)
            ->get();

        // 如果没有完成条件，则默认已完成
        if ($conditions->isEmpty()) {
            return true;
        }

        // 检查每个条件
        foreach ($conditions as $condition) {
            // 根据条件类型进行检查
            $conditionChecker = new ConditionLogic();
            if (!$conditionChecker->checkCondition($userId, $condition)) {
                return false;
            }
        }

        return true;
    }

    /**
     * 发放活动奖励
     *
     * @param int $userId 用户ID
     * @param ActivityConfig $activity 活动配置
     * @return array 奖励结果
     */
    private function grantActivityReward(int $userId, ActivityConfig $activity): array
    {
        $result = [
            'success' => true,
            'rewards' => []
        ];

        // 如果活动配置了奖励组
        if ($activity->reward_group_id || $activity->reward_group_code) {
            try {
                // 使用奖励组服务发放奖励
                $rewardGroupId = $activity->reward_group_id;
                $rewardGroupCode = $activity->reward_group_code;

                // 调用奖励组服务
                $rewardService = new \App\Module\Game\Services\RewardService();
                $rewardResult = $rewardService::grantReward(
                    $userId,
                    $rewardGroupId ?: $rewardGroupCode,
                    REWARD_SOURCE_TYPE::ACTIVITY,
                    $activity->id
                );

                if ($rewardResult->success) {
                    $result['rewards'] = $rewardResult->items;
                } else {
                    Log::error('活动奖励发放失败', [
                        'user_id' => $userId,
                        'activity_id' => $activity->id,
                        'error' => $rewardResult->errorMessage
                    ]);
                    $result['success'] = false;
                    $result['error'] = $rewardResult->errorMessage;
                }
            } catch (Exception $e) {
                Log::error('活动奖励发放异常', [
                    'user_id' => $userId,
                    'activity_id' => $activity->id,
                    'error' => $e->getMessage()
                ]);
                $result['success'] = false;
                $result['error'] = $e->getMessage();
            }
        }

        return $result;
    }
}