<?php

namespace app\common\Service\Share;

use think\Model;
use app\common\model\user\Share as ShareModel;
use app\common\model\User as UserModel;
use app\common\model\Goods as GoodsModel;
use app\common\Enum\ShareEnum;
use app\common\Enum\PageTypeEnum;

class ShareService
{
    /**
     * 添加分享记录
     * @param int $userId 当前用户ID
     * @param array $params 分享参数
     * @return mixed
     */
    public static function addShareLog($userId = 0, $params)
    {
        // 错误的分享参数
        if (empty($params['spm'])) {
            return false;
        }
        $shareId = $params['shareId'];
        // 分享用户为空
        if ($shareId <= 0) {
            return false;
        }

        // 不能分享给本人
        if ($shareId == $userId) {
            return false;
        }

        // 新用户不能分享给老用户 按需打开
        // if($user->id < $shareId) {
        //   return false;
        // }

        $shareUser = UserModel::where('id', $shareId)->find();
        // 分享人不存在
        if (!$shareUser) {
            return false;
        }

        // 5分钟内相同的分享信息不保存，防止冗余数据
        $lastShareLog = ShareModel::where([
            'user_id' => $userId
        ])->where('createtime', '>', time() - 300)->order('id desc')->find();

        if ($lastShareLog && $lastShareLog->spm === $params['spm']) {
            return $lastShareLog;
        }

        // 根据页面类型构造页面路径和描述
        $pageInfo = self::getPageInfo($params['page'], $params['query'], $shareUser);
        
        $memoText = '通过' . ShareEnum::getFromText($params['from']) . '访问了' . $pageInfo['description'];

        $ext = [
            'image' => $pageInfo['image'] ?? "",
            'memo' => $memoText
        ];

        $shareInfo = ShareModel::create([
            'user_id' => $userId,
            'share_id' => $shareId,
            'spm' => $params['spm'],
            'page' => $pageInfo['path'],
            'query' => $params['query'],
            'platform' => $params['platform'],
            'from' => $params['from'],
            'ext' => $ext
        ]);

        $data = ['shareInfo' => $shareInfo];
       
        \think\Hook::listen('user_share_after', $data);

        return $shareInfo;
    }

    /**
     * 根据页面类型获取页面信息
     * @param int $pageType 页面类型
     * @param string $query 查询参数
     * @param object $shareUser 分享者用户对象（可选）
     * @return array
     */
    private static function getPageInfo($pageType, $query, $shareUser = null)
    {
        $pageInfo = [
            'path' => '',
            'description' => '',
            'image' => ''
        ];

        switch ($pageType) {
            case PageTypeEnum::HOME:
                $pageInfo['path'] = '/pages/index/index';
                $pageInfo['description'] = '首页';
                break;
                
            case PageTypeEnum::GOODS:
                $pageInfo['path'] = '/pages/goods/index';
                $pageInfo['description'] = '商品';
                $pageInfo = self::appendGoodsInfo($pageInfo, $query);
                break;
                
            case PageTypeEnum::GROUP_GOODS:
                $pageInfo['path'] = '/pages/goods/groupon';
                $pageInfo['description'] = '拼团商品';
                $pageInfo = self::appendGoodsInfo($pageInfo, $query);
                break;
                
            case PageTypeEnum::SECKILL_GOODS:
                $pageInfo['path'] = '/pages/goods/seckill';
                $pageInfo['description'] = '秒杀商品';
                $pageInfo = self::appendGoodsInfo($pageInfo, $query);
                break;
                
            case PageTypeEnum::INVITE_GROUP:
                $pageInfo['path'] = '/pages/activity/groupon/detail';
                $pageInfo['description'] = '拼团活动';
                break;
                
            case PageTypeEnum::AGENT_POSTER:
                $pageInfo['path'] = '/pages/agent/poster';
                if ($shareUser) {
                    $pageInfo['description'] = $shareUser->nickname . '的分销海报页';
                } else {
                    $pageInfo['description'] = '分销海报页';
                }
                break;
                
            default:
                $pageInfo['path'] = '/pages/index/index';
                $pageInfo['description'] = '未知页面';
                break;
        }

        return $pageInfo;
    }

    /**
     * 为商品页面添加商品信息
     * @param array $pageInfo 页面信息
     * @param string $goodsId 商品ID
     * @return array
     */
    private static function appendGoodsInfo($pageInfo, $goodsId)
    {
        if (!empty($goodsId)) {
            $goods = GoodsModel::find($goodsId);
            if ($goods) {
                $pageInfo['description'] .= "[{$goods->title}]";
                $pageInfo['image'] = $goods->image;
            }
        }

        return $pageInfo;
    }

    /**
     * 解析spm参数
     * @param string $spm smp参数
     * @return array|false
     */
    public static function parseSpm($spm)
    {
        if (empty($spm)) {
            return false;
        }

        $spmParts = explode('.', $spm);
        if (count($spmParts) < 5) {
            return false;
        }

        list($shareId, $pageType, $query, $platform, $from) = $spmParts;

        return [
            'shareId' => intval($shareId),
            'pageType' => intval($pageType),
            'query' => $query,
            'platform' => intval($platform),
            'from' => intval($from)
        ];
    }

    /**
     * 获取用户的分享记录列表
     * @param int $userId 用户ID
     * @param int $pageSize 每页数量
     * @param string $type 记录类型：shared(我分享的) | received(我收到的分享)
     * @return mixed
     */
    public static function getUserShareLogs($userId, $pageSize = 8, $type = 'received')
    {
        $query = ShareModel::with(['user' => function ($query) {
            return $query->field(['id', 'nickname', 'avatar']);
        }]);

        // 根据类型设置查询条件
        if ($type === 'shared') {
            // 查看我分享的记录（我作为分享者）
            $query->where('share_id', $userId);
        } else {
            // 查看我收到的分享记录（我作为被分享者）
            $query->where('user_id', $userId);
        }

        $logs = $query->order('createtime desc')
                     ->paginate($pageSize);

        return $logs;
    }

    /**
     * 获取用户分享统计数据
     * @param int $userId 用户ID
     * @return array
     */
    public static function getUserShareStats($userId)
    {
        return [
            'shared_count' => ShareModel::where('share_id', $userId)->count(), // 我分享的次数
            'received_count' => ShareModel::where('user_id', $userId)->count(), // 收到的分享次数
            'today_shared' => ShareModel::where('share_id', $userId)
                                       ->whereTime('createtime', 'today')
                                       ->count(), // 今日分享次数
            'today_received' => ShareModel::where('user_id', $userId)
                                         ->whereTime('createtime', 'today')
                                         ->count(), // 今日收到分享次数
        ];
    }

    /**
     * 获取分享记录详情
     * @param int $shareLogId 分享记录ID
     * @param int $userId 当前用户ID（用于权限验证）
     * @return mixed
     */
    public static function getShareLogDetail($shareLogId, $userId = 0)
    {
        $query = ShareModel::with(['user']);
        
        // 如果指定了用户ID，则验证权限（只能查看自己相关的记录）
        if ($userId > 0) {
            $query->where(function($query) use ($userId) {
                $query->whereOr('user_id', $userId)
                      ->whereOr('share_id', $userId);
            });
        }

        $shareLog = $query->where('id', $shareLogId)->find();

        if ($shareLog) {
            // 解析SPM参数
            $spmInfo = self::parseSpm($shareLog->spm);
            if ($spmInfo) {
                $shareLog->spm_info = $spmInfo;
                $shareLog->page_type_text = PageTypeEnum::getPageTypeText($spmInfo['pageType']);
            }
        }

        return $shareLog;
    }
}