/**
 * 品牌一览 controller
 * @author: ghw<hongwei.gao@yoho.cn>
 * @date: 2016/9/29
 */
'use strict';

const Promise = require('bluebird');
const co = Promise.coroutine;
const api = global.yoho.API;
const headerModel = require('../../../doraemon/models/header');
const brandsModel = require('./brands-model');
const _ = require('lodash');
const helpers = global.yoho.helpers;
const pager = require(`${global.utils}/pager`).setPager;

/**
 * 获取品牌一览list
 * @param string $channel 频道名称
 * @param int start  开始位置 1 开始
 * @param int length 取数长度 0 取到最后
 */
exports.getBrandViewList = (channel) => {
    let apiMethod = [
        headerModel.requestHeaderData(channel),
        brandsModel.getBrandViewTop(channel),
        brandsModel.getBrandViewList(channel, 1, 5) //分屏加载
    ];

    return api.all(apiMethod).then(result => {
        let responseData = {
            module: 'brands',
            page: 'brands'
        };

        // 头部数据
        Object.assign(responseData, result[0]);

        // 品牌一览列表
        responseData.brands = result[1];
        responseData.brands.navigation = result[2].navigation;
        responseData.brands.category = result[2];
        return responseData;
    });
};

/**
 * brandList-Ajax调用
 */
exports.getBrandList = (channel, start) => {
    let apiMethod = [
        brandsModel.getBrandViewList(channel, start)
    ];

    return api.all(apiMethod).then(result => {
        let responseData = {};

        // 品牌一览列表
        responseData.category = result[0];
        return responseData;
    });
};

/**
 * 品牌接口数据
 *
 * @param string brandId 获取品牌ID
 * @return json
 */
exports.brandInfo = (brandId, uid) => {
    let apiMethod = [
        brandsModel.getBrandInfo(brandId, uid)
    ];

    return api.all(apiMethod).then(result => {

        return {
            code: _.isEmpty(result[0]) ? 400 : 200,
            brand: _.isEmpty(result[0]) ? '' : result[0]
        };
    });
};

/**
 * 多个品牌ID获取品牌信息
 *
 * @param array $brandIds
 * @return array
 */
exports.plusstarList = (channel, req) => {
    return co(function*() {
        let headerData = yield headerModel.requestHeaderData(channel);

        let responseData = {
            module: 'brands',
            page: 'brands',
            brandsHomePage: true
        };

        let id = req.query.id || '',
            gender = req.query.gender || '',
            limit = 20,
            page = parseInt(req.query.page, 10) || 1;

        let items = yield brandsModel.getPlusstarBrandListItem(channel);

        let brandType = 1;

        if (items[id]) {
            brandType = items[id].brandType;
        }
        let plustarList = yield brandsModel.getPlustarList(brandType, gender);

        let list = plustarList.data;

        let brandIds = [],
            brands = [],
            pageList = {};

        brandIds = plustarList.brandsIds.slice((page - 1) * limit, page * limit);
        if (plustarList.brandsIds.length > limit) {
            pageList = pager(Math.ceil(plustarList.brandsIds.length / limit), {
                page: page,
                id: id
            });
        }

        if (brandIds.length > 0) {
            // 获取品牌信息
            let brandsInfo = yield brandsModel.getBrandInfoByIds(brandIds);

            _.forEach(brandIds, brandId => {
                if (brandsInfo[brandId]) {
                    list[brandId].desc = brandsInfo[brandId].desc;
                    list[brandId].url = helpers.urlFormat(brandsInfo[brandId].url + '?gender=' + gender);
                }
                brands.push(list[brandId]);
            });
        }

        let data = {
            brandsHomePage: true,
            brands: {
                items: brands,
                tabs: items

            }
        };

        // 头部数据
        Object.assign(responseData, headerData);

        // 产品信息
        Object.assign(responseData, data);

        // 页码
        Object.assign(responseData, pageList);
        return responseData;
    })();

};