'use strict';

/**
 * 指标库控制器
 *
 * @author Mai
 * @data 2018/4/19
 * @version
 */
const fs = require('fs');
const path = require('path');
const awaitWriteStream = require('await-stream-ready').write;
const sendToWormhole = require('stream-wormhole');
const libConst = require('../const/lib');
module.exports = app => {
    class LibController extends app.BaseController {

        /**
         * 指标库页面
         *
         * @param {object} ctx - egg全局context
         * @return {void}
         */
        async index (ctx) {
            let status = ctx.query.status;
            const libList = await ctx.service.quotaLib.getList(status);

            //获取指标源状态数量
            const libStatus = await ctx.service.quotaLib.getStatusNum();
            const renderData = {
                status,
                libList,
                libConst,
                libStatus
            };
            await this.layout('lib/index.ejs', renderData, 'lib/modal.ejs');
        }

        /**
         * 上传指标源
         *
         * @param {object} ctx - egg全局context
         * @return {void}
         */
        async upload(ctx) {
            const parts = ctx.multipart({ autoFields: true });
            let addData = {};
            let stream;
            while ((stream = await parts()) != null) {
                const filename = stream.filename.toLowerCase();
                if(filename === ''){
                    throw '请上传文件';
                }
                const fileInfo = path.parse(filename);
                let create_time = Date.parse( new Date())/1000;
                let filepath = libConst.quotaLibDir + create_time + fileInfo.ext;

                addData = {
                    name: fileInfo.name,
                    path: filepath,
                    create_time: create_time
                };
                const target = path.join(filepath);
                const writeStream = fs.createWriteStream(target);
                try {
                    await awaitWriteStream(stream.pipe(writeStream));
                } catch (err) {
                    await sendToWormhole(stream);
                    throw err;
                }
            }
            if(addData !== {}){

                try {
                    //插入数据到数据库
                    const result = await ctx.service.quotaLib.add(addData);
                    if (!result) {
                        throw '新增指标源数据失败';
                    }
                    ctx.redirect('/lib');
                } catch (err) {
                    throw err;
                }
            }else{
                throw '请上传文件';
            }
        }
    }

    return LibController;
}