<?php
/**
 * Created by PhpStorm.
 * User: stanley-king
 * Date: 2017/4/5
 * Time: 下午10:46
 */

namespace user_session;

require_once (BASE_ROOT_PATH . '/helper/algorithm.php');
require_once (BASE_ROOT_PATH . '/helper/session_helper.php');

use algorithm;
use session_helper;

class favorite
{
    static $stTypes = array('goods','brand');

    private $mBrands;
    private $mGoods;
    private $mDirty;

    public function __construct()
    {
        $this->mBrands = [];
        $this->mGoods = [];
        $this->mDirty = false;

        if(isset($_SESSION['favorite']))
        {
            if(isset($_SESSION['favorite']['brands'])) {
                $this->mBrands = $_SESSION['favorite']['brands'];
            }
            if(isset($_SESSION['favorite']['goods'])) {
                $this->mGoods = $_SESSION['favorite']['goods'];
            }
        }
        else {
            $this->onLogin();
        }
    }
    public function __destruct()
    {
        if($this->mDirty) {
            $_SESSION['favorite']['brands'] = $this->mBrands;
            $_SESSION['favorite']['goods']  = $this->mGoods;
        }
    }

    public function onLogin()
    {
        $this->mBrands = [];
        $this->mGoods = [];
        $this->mDirty = true;

        $mod_favorites = Model('favorites');
        $favorites  = $mod_favorites->getGoodsFavoritesList(array('member_id' => $_SESSION['member_id']));

        foreach ($favorites as $item)
        {
            if($item['fav_type'] == 'goods') {
                $this->mGoods[] = intval($item['fav_id']);
            }
            elseif($item['fav_type'] == 'brand') {
                $this->mBrands[] = intval($item['fav_id']);
            }
            else {
                continue;
            }
        }
        sort($this->mBrands);
        sort($this->mGoods);
    }

    public function add($type,$id)
    {
        $id = intval($id);
        if($type == 'brand')
        {
            if(algorithm::binary_search($this->mBrands,$id) == false) {
                $pos = algorithm::lower_bonud($this->mBrands,$id);
                algorithm::array_insert($this->mBrands,$pos,$id);
                $this->mDirty  = true;
            }
        }
        elseif($type == 'goods')
        {
            if(algorithm::binary_search($this->mGoods,$id) == false) {
                $pos = algorithm::lower_bonud($this->mGoods,$id);
                algorithm::array_insert($this->mGoods,$pos,$id);
                $this->mDirty  = true;
            }
        }
    }

    public function del($type,$id)
    {
        $id = intval($id);
        if($type == 'brand')
        {
            if(algorithm::binary_search($this->mBrands,$id) == true) {
                $pos = algorithm::lower_bonud($this->mBrands,$id);
                algorithm::array_erase($this->mBrands,$pos);
                $this->mDirty  = true;
            }
        }
        elseif($type == 'goods')
        {
            if(algorithm::binary_search($this->mGoods,$id) == true) {
                $pos = algorithm::lower_bonud($this->mGoods,$id);
                algorithm::array_erase($this->mGoods,$pos);
                $this->mDirty  = true;
            }
        }
    }

    public function favored_goods($goods_id)
    {
        if(!session_helper::logined()) return false;

        $goods_id = intval($goods_id);
        return algorithm::binary_search($this->mGoods,$goods_id);
    }

    public function favored_brand($brand_id)
    {
        if(!session_helper::logined()) return false;

        $brand_id = intval($brand_id);
        return algorithm::binary_search($this->mBrands,$brand_id);
    }
}