/**
 * search controller
 * @author: wsl<shuiling.wang@yoho.cn>
 * @date: 2016/7/21
 */

'use strict';
const mRoot = '../models';
const headerModel = require('../../../doraemon/models/header');
const searchModel = require(`${mRoot}/search`);
const _ = require('lodash');
const helpers = global.yoho.helpers;

/**
 * 搜索落地页
 */
const list = (req, res, next) => {
    let params = Object.assign({
        isSearch: true, // 搜索列表将最新改成默认的标识
        cartUrl: helpers.urlFormat('/cart/index/index')
    }, req.query);
    let title = '';
    let query = req.query.query;
    let isQueryFirstClass = false; // 标识用户搜的是不是一级品类
    let isQuerySecondClass = false; // 标识用户搜的是不是二级品类
    let domain = null;

    if (params.query) {
        let activity = _.get(searchModel.searchKeyActivity(params.query), 'data.urlobj.appUrl', '');

        if (activity) {
            res.redirect(activity);
        }
    }

    if (params.shop_id) {
        params.shopId = params.shop_id;
    }

    // 获取第一页数据做服务端渲染
    let initialData = {
        query: query,
        type: 'default',
        order: '0',
        page: 1,
        limit: 6,
    };

    /* 判断是不是品牌, 是品牌跳到品牌列表页(显示搜索框),判断是不是品类, 是品类加导航标题(不显示搜索框) */
    Promise.all([
        searchModel.getBrandDomain(query),
        searchModel.getClassNames(),
        searchModel.getSearchData(initialData)
    ]).then(result => {
        if (query) {
            query = query.toLowerCase();

            domain = result[0];

            // 跳转到品牌商品列表页
            if (domain !== null && !params.shop_id) {
                let url = helpers.urlFormat('', {
                    from: 'search',
                    query: query

                }, domain);

                return res.redirect(url);
            }

            // 品类名称为空时跳出
            if (!result[1]) {
                return;
            }

            _.forEach(result[1].first, (obj) => {
                // 精确查一级品类
                if (obj === query) {
                    isQueryFirstClass = true;
                    return false;
                }
            });

            _.forEach(result[1].second, (obj) => {
                // 精确查二级品类
                if (obj === query) {
                    isQuerySecondClass = true;
                    return false;
                }
            });
        } else {
            params.query = '';
        }

        // 搜索是一级品类
        if (isQueryFirstClass) {
            title = '全部' + query;
        } else if (isQuerySecondClass) { // 搜索是二级品类
            title = query;
        } else { // 搜索其它内容
            if (query || params.form) {
                params.search = {
                    default: query === '' ? false : query,
                    url: helpers.urlFormat('', null, 'search')
                };
            }
            title = '搜索';
        }

        title = params.title ? params.title : title;

        res.render('search/list', {
            _noLazy: true,
            module: 'product',
            page: 'search-list',
            pageHeader: headerModel.setNav({
                navTitle: title
            }),
            title: title,
            goodList: params,
            firstPageGoodsList: result[2] || [],
            pageFooter: true
        });
    }).catch(next);
};

/**
 * 搜索主页
 */
const index = (req, res, next) => {
    let title = '搜索';

    ((render) => {
        if (_.get(req, 'app.locals.wap.search.removeHotSearch', false)) {
            render([]);
        } else {
            searchModel.getSearchIndex().then((result) => {
                render(result);
            }).catch(next);
        }

    })((result) => {
        res.render('search/index', {
            module: 'product',
            page: 'search-index',
            pageHeader: headerModel.setNav({
                navTitle: title
            }),
            pageFooter: true,
            search: {
                defaultTerms: (result && result.defaultTerms && result.defaultTerms.length !== 0) ? result.defaultTerms[0].content : '',
                url: helpers.urlFormat('', null, 'search'),
                hotTerms: result.hotTerms
            }

        });
    });

};

/**
 * 联动搜索
 */
let fuzzyDatas = (req, res, next) => {
    let params = req.query.keyword;

    searchModel.getFuzzyDatas(params).then((result) => {
        res.json(result);
    }).catch(next);
};


/**
 * ajax 商品数据请求
 */
const search = (req, res, next) => {
    res.header('Access-Control-Allow-Origin', '*');

    let params = Object.assign({}, req.query);

    params.isApp = req.yoho.isApp;
    searchModel.getSearchData(params).then((result) => {
        if (params.page === 1 && params.start > 0) {
            // 首屏渲染时，使用 'start' 参数裁减已渲染数据
            result = result.slice(params.start || 0);
        }

        res.render('search/page', {
            layout: false,
            new: result
        });
    }).catch(next);
};

/**
 * 筛选
 */
let filter = (req, res, next) => {
    res.header('Access-Control-Allow-Origin', '*');

    let params = Object.assign({}, req.query);

    searchModel.getFilterData(params).then((result) => {
        res.render('search/filter', {
            layout: false,
            params: params,
            filter: result
        });
    }).catch(next);
};

module.exports = {
    list,
    filter,
    search,
    index,
    fuzzyDatas
};