'use strict';

/**
 * 指标模板控制器
 *
 * @author Mai
 * @data 2018/4/19
 * @version
 */

// excel解析
const excel = require('node-xlsx');
const sendToWormhole = require('stream-wormhole');
module.exports = app => {
    class TemplateController extends app.BaseController {
        /**
         * 指标模板页面
         *
         * @param {object} ctx - egg全局context
         * @return {void}
         */
        async index (ctx) {
            const node = await ctx.service.templateNode.getAllDataByCondition({template_id: 1});
            const treeNode = ctx.helper.convertData(node, true, 'node_id', 'node_pid');
            const renderData = {
                nodes: JSON.stringify(treeNode),
            }
            await this.layout('template/index.ejs', renderData, 'template/modal.ejs');
        }

        async uploadExcel(ctx) {
            let stream;
            try {
                stream = await ctx.getFileStream();
                const fileName = this.app.baseDir + '/app/public/template/uploads/' + stream.filename;
                // 保存文件
                await ctx.helper.saveStreamFile(stream, fileName);
                // 读取文件
                const sheet = excel.parse(fileName);
                if (!sheet || sheet.length === 0 || sheet[0] === undefined || sheet[0].data === undefined) {
                    throw 'excel没有对应数据';
                }
                const result = await ctx.service.templateNode.importData(sheet);
                if (!result) {
                    throw '导入数据失败';
                }
                ctx.redirect('/template');
            } catch (err) {
                console.log(err);
                // 失败需要消耗掉stream 以防卡死
                if (stream) {
                    await sendToWormhole(stream);
                }
                //this.setMessage(err.toString(), this.messageType.ERROR);
                ctx.redirect('/template');
            }
        }
    }

    return TemplateController;
}