/**
 * 商品详情页controller
 * @author: yyq<yanqing.yang@yoho.cn>
 * @date: 2016/7/4
 */
'use strict';

const _ = require('lodash');
const item = require('../models/item');

// 保存在 gids 和 skns ,最近流览功能
const saveRecentGoodInCookies = (oldSkns, res, addSkns) => {
    oldSkns = oldSkns ? oldSkns.split(',') : [];
    oldSkns = _.reject(oldSkns, old => old === String(addSkns) ? true : false);
    oldSkns.unshift(addSkns);

    res.cookie('_browseskn', oldSkns.splice(0, 30).join(','), {
        maxAge: 2000000000,
        domain: '.yohoblk.com'
    });
};

/**
 * 商品详情页
 * @function index
 */
const index = (req, res, next) => {
    req.params.channel = req.yoho.channel;
    item.getProductItemData(req.params, req.url, req.user.uid).then(result => {
        if (_.isEmpty(result)) {
            return next();
        }

        // 最近浏览存储cookies 限量商品不加入到最近浏览
        if (!_.has(result.content.goodInfo, 'fashionTopGoods')) {
            saveRecentGoodInCookies(req.cookies._browseskn, res, result.content.goodInfo.productSkn);
        }

        result.page = 'item';
        result.title += ` | ${res.locals.title}`;
        res.display('item', result);
    }).catch(next);
};

/**
 * 获取商品信息接口
 * @function getProductInfo
 * @param { number } productId 商品id
 * @param { number } skn 商品skn
 * @return { Object } 商品信息
 */
const getProductInfo = (req, res, next) => {
    const productId = req.query.productId;
    const skn = req.query.skn;
    let uid;

    if (req.user && req.user.uid) {
        uid = req.user.uid;
    }

    item.getProductInfo(productId, skn, uid).then(result => {
        res.json(result);
    }).catch(next);
};

/**
 * 特殊商品退换货
 */
const fetchReturn = (req, res, next) => {
    let skn = req.query.skn || 0;

    if (!skn) {
        return {
            code: 400,
            message: '商品数据出错'
        };
    }

    return item.fetchReturn(skn).then(result => {
        return res.json({
            code: 200,
            data: {
                result: result
            }
        });
    }).catch(next);
};

module.exports = {
    index, // 商品详情页
    getProductInfo, // 获取商品信息接口
    fetchReturn
};