<?php

namespace App\Module\Activity\Logics;

use App\Module\Activity\Dtos\UserActivityDataDto;
use App\Module\Activity\Models\UserActivityData;
use Carbon\Carbon;
use Exception;

/**
 * 进度逻辑类
 */
class ProgressLogic
{
    /**
     * 获取用户活动进度
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return UserActivityDataDto|null
     */
    public function getUserActivityProgress(int $userId, int $activityId): ?UserActivityDataDto
    {
        $userData = UserActivityData::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();
        
        if (!$userData) {
            return null;
        }
        
        return UserActivityDataDto::fromModel($userData);
    }

    /**
     * 更新用户活动进度
     *
     * @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 UserActivityDataDto
     * @throws Exception
     */
    public function updateUserActivityProgress(int $userId, int $activityId, int $progress, ?array $progressData = null): UserActivityDataDto
    {
        // 获取或创建用户活动数据
        $userData = UserActivityData::firstOrNew([
            'user_id' => $userId,
            'activity_id' => $activityId,
        ]);
        
        // 设置进度值
        $userData->progress = $progress;
        
        // 设置进度数据
        if ($progressData !== null) {
            $userData->progress_data = $progressData;
        }
        
        // 更新最后更新时间
        $userData->last_update = Carbon::now();
        
        // 保存数据
        $userData->save();
        
        return UserActivityDataDto::fromModel($userData);
    }

    /**
     * 增加用户活动进度
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @param int $increment 增量值
     * @param array|null $progressData 进度数据
     * @return UserActivityDataDto
     * @throws Exception
     */
    public function incrementUserActivityProgress(int $userId, int $activityId, int $increment, ?array $progressData = null): UserActivityDataDto
    {
        // 获取或创建用户活动数据
        $userData = UserActivityData::firstOrNew([
            'user_id' => $userId,
            'activity_id' => $activityId,
        ]);
        
        // 如果是新创建的记录，设置初始值
        if (!$userData->exists) {
            $userData->progress = 0;
            $userData->progress_data = [];
        }
        
        // 增加进度值
        $userData->progress += $increment;
        
        // 设置进度数据
        if ($progressData !== null) {
            $userData->progress_data = $progressData;
        }
        
        // 更新最后更新时间
        $userData->last_update = Carbon::now();
        
        // 保存数据
        $userData->save();
        
        return UserActivityDataDto::fromModel($userData);
    }

    /**
     * 重置用户活动进度
     *
     * @param int $userId 用户ID
     * @param int $activityId 活动ID
     * @return bool
     */
    public function resetUserActivityProgress(int $userId, int $activityId): bool
    {
        // 获取用户活动数据
        $userData = UserActivityData::where('user_id', $userId)
            ->where('activity_id', $activityId)
            ->first();
        
        if (!$userData) {
            return false;
        }
        
        // 重置进度值和进度数据
        $userData->progress = 0;
        $userData->progress_data = [];
        $userData->last_update = Carbon::now();
        
        return $userData->save();
    }

    /**
     * 获取活动的总体进度统计
     *
     * @param int $activityId 活动ID
     * @return array
     */
    public function getActivityProgressStats(int $activityId): array
    {
        // 获取所有用户的活动数据
        $userDataList = UserActivityData::where('activity_id', $activityId)->get();
        
        // 计算统计数据
        $totalUsers = $userDataList->count();
        $totalProgress = $userDataList->sum('progress');
        $averageProgress = $totalUsers > 0 ? $totalProgress / $totalUsers : 0;
        $maxProgress = $userDataList->max('progress');
        $minProgress = $userDataList->min('progress');
        
        return [
            'total_users' => $totalUsers,
            'total_progress' => $totalProgress,
            'average_progress' => $averageProgress,
            'max_progress' => $maxProgress,
            'min_progress' => $minProgress,
        ];
    }
}