<?php

// +----------------------------------------------------------------------
// | EasyAdmin
// +----------------------------------------------------------------------
// | PHP交流群: 763822524
// +----------------------------------------------------------------------
// | 开源协议  https://mit-license.org 
// +----------------------------------------------------------------------
// | github开源项目：https://github.com/zhongshaofa/EasyAdmin
// +----------------------------------------------------------------------

namespace app\common\service;

use app\common\model\GoodsAttensionModel;
use app\common\model\ShopGoodsModel;
use think\Exception;
use think\facade\Db;
use utils\RedisCache;

/**
 * 商品服务 by wes
 * Class ShopGoodsService
 * @package app\common\service
 */
class ShopGoodsService
{
    protected static $instance = null;
    protected $model = null;

    public function __construct()
    {
        $this->model = new ShopGoodsModel();
    }

    /**
     * 静态化入口
     * @return static|null
     */
    public static function make()
    {
        if(!self::$instance){
            self::$instance = new static();
        }

        return self::$instance;
    }

    /**
     * 获取列表
     * @param $map 分组
     * @param $pageSize 分页大小
     * @param $field 返回字段
     * @param $cache 是否缓存数据，默认是
     * @return array|mixed
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function getList($map, $pageSize=10, $field='', $cache=true)
    {
        $page = request()->post('page', 1);
        $cacheKey = "caches:goods:list_{$page}_{$pageSize}_".md5(json_encode($map, 256).$field);
        $list = RedisCache::get($cacheKey);
        if($list && $cache){
            return $list;
        }

        $where = ['on_sale'=> 1];
        $menuId = isset($map['menu_id'])? intval($map['menu_id']) : 0;
        if ($menuId>0){
            $where['menu_id'] = $menuId;
        }

        $keywords = isset($map['keywords'])? trim($map['keywords']) : '';
        if (!empty($keywords)) {
            $where['goods_name|hot_keywords'] = "%{$map['keywords']}%";
        }

        $field = $field? $field : 'sort,category,goods_sn,goods_name,goods_img,min_original_price as original_price,min_price as price,rebate_score,sales_volume,inventory,attension_count,restrictions_num';
        $order = isset($map['sort']) && $map['sort']? $map['sort'] : 'sort desc,goods_id desc';
        $list = $this->model->where($where)
            ->where(function($query) use($map){
                $cls = isset($map['cls'])? trim($map['cls']) : 0;
                if (!empty($cls)) {
                    $query->where('give_vip','>', 0);
                }
            })
            ->field($field)
            ->order($order)
            ->paginate($pageSize);
        $list = $list? $list->toArray():[];
        if($list){
            RedisCache::set($cacheKey, $list, rand(10,20));
        }

        return $list;
    }

    /**
     * 获取商品详情
     * @param $map
     * @return array|mixed
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function getDetail($map)
    {
        $where = [];
        $goodsSn = isset($map['goods_sn'])? trim($map['goods_sn']) : 0;
        $goodsId = isset($map['goods_id'])? intval($map['goods_id']) : 0;
        if($goodsSn){
            $where['goods_sn'] = $goodsSn;
        }
        if($goodsId){
            $where['goods_id'] = $goodsId;
        }

        $isCache = false;
        $cacheKey = "caches:goods:detail_sn{$goodsSn}_g{$goodsId}";
        $info = RedisCache::get($cacheKey);
        if(empty($info)){
            $field = 'menu_id,spec_name,goods_id,category,goods_sn,goods_name,goods_img,goods_img_banner,goods_remark,min_original_price as original_price,min_price as price,note,inventory,rebate_score,sales_volume,restrictions,rush_buy,buynote_template as buyNote,post_template_id,restrictions_num';
            $info = $this->model->where($where)->field($field)->withAttr('goods_img_banner', function ($value) {
                return json_decode($value, true) ?: [];
            })->withAttr('goods_remark', function ($value) {
                return htmlspecialchars_decode($value);
            })->withAttr('buyNote', function ($value) {
                return htmlspecialchars_decode($value);
            })->findOrEmpty()->toArray();
        }else{
            $isCache = true;
        }

        if($info){
            $specRelation = ShopGoodsSpecRelationService::make()->getDataByGoods($info['goods_id']);
            $goodsExpress = ExpressDeliveryService::make()->getDataByTemplate($info['post_template_id']);
            $goodsSpec = ShopGoodsSpecService::make()->getListByGoods($info['goods_id']);

            $info['expressNote'] = $goodsExpress['remake'] ?: '';
            $info['spec_relation'] = $specRelation;
            $info['goods_spec'] = $goodsSpec;
            $attensionCount = RedisCache::get("caches:goods:attension:{$info['goods_id']}");
            if($isCache && $attensionCount>0){
                $info['attension_count'] = $attensionCount;
            }
            RedisCache::set($cacheKey, $info, rand(3,5));
        }

        return $info;
    }

    /**
     * 更新商品浏览量
     * @param $goodsId
     * @return false
     */
    public function updateScanCount($goodsId)
    {
       return $goodsId?$this->model->where(['goods_id'=> $goodsId])->inc('scan_count',1)->update():false;
    }

    /**
     * 商品收藏
     * @param $uid 用户
     * @param $goodsId
     * @return bool
     * @throws Exception
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function goodsAttension($uid, $goodsId)
    {
        $info = $this->model->where(['goods_id'=> $goodsId])->field('goods_id,attension_count')->find();
        if(!$info){
            throw new Exception('商品不存在');
        }

        // 是否收藏过
        if(GoodsAttensionModel::where(['uid'=> $uid,'goods_id'=> $goodsId])->value('id')){
            return true;
        }else{
            $data = [
                'uid'=> $uid,
                'goods_id'=> $goodsId,
                'create_time'=>sr_getcurtime(time())
            ];

            Db::startTrans();
            if(!GoodsAttensionModel::insertGetId($data)){
                Db::rollback();
                throw new Exception('收藏失败');
            }

            if(!$this->model->where(['goods_id'=> $goodsId])->inc('attension_count')->update()){
                Db::rollback();
                throw new Exception('收藏失败');
            }

            $attenSionCount = isset($info['attension_count'])? $info['attension_count'] : 0;
            RedisCache::set("caches:goods:attension:{$goodsId}", $attenSionCount+1, rand(5, 10));
            RedisCache::keyDel('caches:goods:list_*');
            Db::commit();
            return true;
        }
    }

    /**
     * 取消收藏
     * @param $uid 用户
     * @param $goodsId 商品ID
     * @return bool
     */
    public function cancelAttension($uid, $goodsId)
    {
        if(!GoodsAttensionModel::where(['uid'=> $uid,'goods_id'=> $goodsId])->value('id')){
            return true;
        }

        Db::startTrans();
        if(GoodsAttensionModel::where(['uid'=> $uid,'goods_id'=> $goodsId])->delete()){
            RedisCache::keyDel('caches:goods:list_*');
            if(!$this->model->where(['goods_id'=> $goodsId])->dec('attension_count')->update()){
                Db::rollback();
                return false;
            }

            Db::commit();
            RedisCache::keyDel("caches:goods:attension:{$goodsId}");
            return true;
        }else{
            Db::rollback();
            return false;
        }
    }

    /**
     * 是否收藏过该商品
     * @param $uid 用户
     * @param $goodsId 商品
     * @return bool|mixed
     */
    public function checkAttension($uid, $goodsId)
    {
        $cacheKey = "caches:goods:attensionUser:u_{$uid}_g{$goodsId}";
        if(RedisCache::get($cacheKey)){
            return true;
        }

        $data = GoodsAttensionModel::where(['uid'=> $uid,'goods_id'=> $goodsId])->value('id');
        if($data){
            RedisCache::set($cacheKey, $data, rand(5, 10));
        }

        return $data? true : false;
    }

    /**
     * 获取商品缓存信息
     * @param $goodsSn
     * @param string $field
     * @return array|mixed
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function getCacheInfo($goodsSn, $field='', $cache=true)
    {
        $cacheKey = "caches:goods:info_sn{$goodsSn}".($field? '_'.md5($field) : '');
        $info = RedisCache::get($cacheKey);
        if($info && $cache){
            return $info;
        }

        $field? $field : 'id,goods_type,restrictions_num';
        $info = $this->model->where(['goods_sn'=> $goodsSn])->field($field)->find();
        $info = $info? $info->toArray() : [];
        if($info && $cache){
            RedisCache::set($cacheKey, $info, rand(5, 10));
        }

        return $info;
    }
}