<?php

namespace App\Module\Activity\Logics;

use App\Module\Activity\Dtos\ActivityParticipationDto;
use App\Module\Activity\Dtos\UserActivityDataDto;
use App\Module\Activity\Enums\PARTICIPATION_STATUS;
use App\Module\Activity\Enums\REWARD_STATUS;
use App\Module\Activity\Models\ActivityParticipation;
use App\Module\Activity\Models\UserActivityData;
use Carbon\Carbon;
use Exception;

/**
 * 参与逻辑类
 */
class ParticipationLogic
{
    /**
     * 获取用户参与记录
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return ActivityParticipationDto|null
     */
    public function getUserParticipation(int $userId, int $activityId): ?ActivityParticipationDto
    {
        $participation = ActivityParticipation::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();

        if (!$participation) {
            return null;
        }

        return ActivityParticipationDto::fromModel($participation);
    }

    /**
     * 获取用户活动数据
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return UserActivityDataDto|null
     */
    public function getUserActivityData(int $userId, int $activityId): ?UserActivityDataDto
    {
        $userData = UserActivityData::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();

        if (!$userData) {
            return null;
        }

        return UserActivityDataDto::fromModel($userData);
    }

    /**
     * 创建参与记录
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return ActivityParticipationDto
     * @throws Exception
     */
    public function createParticipation(int $userId, int $activityId): ActivityParticipationDto
    {
        // 检查事务是否已开启
        \UCore\Db\Helper::check_tr();

        // 检查是否已存在参与记录
        $existingParticipation = ActivityParticipation::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();

        if ($existingParticipation) {
            throw new Exception('用户已参与此活动');
        }

        // 创建参与记录
        $participation = new ActivityParticipation();
        $participation->user_id = $userId;
        $participation->activity_id = $activityId;
        $participation->participate_time = Carbon::now();
        $participation->reward_status = REWARD_STATUS::NOT_CLAIMED;
        $participation->completion_status = PARTICIPATION_STATUS::IN_PROGRESS;
        $participation->save();

        // 创建用户活动数据
        $userData = new UserActivityData();
        $userData->user_id = $userId;
        $userData->activity_id = $activityId;
        $userData->progress = 0;
        $userData->progress_data = [];
        $userData->last_update = Carbon::now();
        $userData->save();

        return ActivityParticipationDto::fromModel($participation);
    }

    /**
     * 更新参与记录状态
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @param int $completionStatus 完成状态
     * @param int|null $rewardStatus 奖励状态
     * @return bool
     * @throws Exception
     */
    public function updateParticipationStatus(int $userId, int $activityId, int $completionStatus, ?int $rewardStatus = null): bool
    {
        // 获取参与记录
        $participation = ActivityParticipation::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();

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

        // 更新完成状态
        $participation->completion_status = $completionStatus;

        // 如果完成状态为已完成，设置完成时间
        if ($completionStatus === PARTICIPATION_STATUS::COMPLETED && !$participation->completion_time) {
            $participation->completion_time = Carbon::now();
        }

        // 更新奖励状态
        if ($rewardStatus !== null) {
            $participation->reward_status = $rewardStatus;
        }

        return $participation->save();
    }

    /**
     * 获取用户进行中的活动
     *
     * @param int $userId 用户ID
     * @return array
     */
    public function getUserInProgressActivities(int $userId): array
    {
        $participations = ActivityParticipation::where('user_id', $userId)
            ->where('completion_status', PARTICIPATION_STATUS::IN_PROGRESS)
            ->with('activity')
            ->get();

        $result = [];

        foreach ($participations as $participation) {
            $result[] = ActivityParticipationDto::fromModel($participation, true);
        }

        return $result;
    }

    /**
     * 获取用户已完成但未领取奖励的活动
     *
     * @param int $userId 用户ID
     * @return array
     */
    public function getUserCompletedUnclaimedActivities(int $userId): array
    {
        $participations = ActivityParticipation::where('user_id', $userId)
            ->where('completion_status', PARTICIPATION_STATUS::COMPLETED)
            ->where('reward_status', REWARD_STATUS::NOT_CLAIMED)
            ->with('activity')
            ->get();

        $result = [];

        foreach ($participations as $participation) {
            $result[] = ActivityParticipationDto::fromModel($participation, true);
        }

        return $result;
    }
}