<?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 object $user 当前用户对象
     * @param array $params 分享参数
     * @return mixed
     */
    public static function addShareLog($user, $params)
    {
        // 错误的分享参数
        if (empty($params['spm'])) {
            return false;
        }

        // 解析spm参数: shareId.page.query.platform.from
        $spmParts = explode('.', $params['spm']);
        if (count($spmParts) < 5) {
            return false;
        }

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

        // 分享用户为空
        if ($shareId <= 0) {
            return false;
        }

        // 不能分享给本人
        if ($shareId == $user->id) {
            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' => $user->id
        ])->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
        $pageInfo = self::getPageInfo($pageType, $query);
        
        $memoText = '通过' . ShareEnum::getFromText($params['from']) . '访问了' . $pageInfo['description'];

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

        $shareInfo = ShareModel::create([
            'user_id' => $user->id,
            'share_id' => $shareId,
            'spm' => $params['spm'],
            'page' => $pageInfo['path'],
            'query' => $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 $query 查询参数
     * @return array
     */
    private static function getPageInfo($pageType, $query)
    {
        $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';
                $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)
        ];
    }
}