/**
 * Created by Tony on 2017/3/13.
 */

let JV = require('../rpt_component/jpc_value_define');
let Template = require('../models/rpt_template');
let TemplateData = require('../models/rpt_tpl_data_demo');
let JpcEx = require('../rpt_component/jpc_ex');
//let cache = require('../../../public/cache/cacheUtil');
let rptUtil = require("../util/rpt_util");
let rpt_xl_util = require('../util/rpt_excel_util');
let fs = require('fs');
let strUtil = require('../../../public/stringUtil');

//统一回调函数
let callback = function(req, res, err, data){
    if(err){
        res.json({success: false, error: err});
    }
    else{
        //res.send({success: true, data: data});
        res.json({success:true, data: data});
    }
};

module.exports = {
    getReportAllPages: function(req, res){
        let grp_id = req.body.grp_id;
        let tpl_id = req.body.tpl_id;
        let pageSize = req.body.pageSize;
        let rptTpl = null;
        Template.findOne({GROUP_KEY: grp_id, ID_KEY: tpl_id}, '-_id').exec().then(function(rst) {
            rptTpl = rst;
            if (rptTpl) {
                return TemplateData.getPromise(tpl_id);
            } else {
                callback(req, res, 'No report template was found!', null);
            }
        }).then(function(tplData){
                if (tplData) {
                    let printCom = JpcEx.createNew();
                    rptTpl[JV.NODE_MAIN_INFO][JV.NODE_PAGE_INFO][JV.PROP_PAGE_SIZE] = pageSize;
                    let defProperties = rptUtil.getReportDefaultCache();
                    printCom.initialize(rptTpl);
                    printCom.analyzeData(rptTpl, tplData, defProperties);
                    let maxPages = printCom.totalPages;
                    let pageRst = printCom.outputAsSimpleJSONPageArray(rptTpl, tplData, 1, maxPages, defProperties);
                    if (pageRst) {
                        callback(req, res, null, pageRst);
                    } else {
                        callback(req, res, "Have errors while on going...", null);
                    }
                } else {
                    callback(req, res, 'No report data were found!', null);
                }
            }
        );
    },
    getExcel: function(req, res) {
        let grp_id = req.params.id, tpl_id = req.params.pm, pageSize = req.params.size, rptName = req.params.rptName;
        let rptTpl = null;
        Template.findOne({GROUP_KEY: grp_id, ID_KEY: tpl_id}, '-_id').exec().then(function(rst) {
            rptTpl = rst;
            if (rptTpl) {
                return TemplateData.getPromise(tpl_id);
            } else {
                callback(req, res, 'No report template was found!', null);
            }
        }).then(function(tplData){
                if (tplData) {
                    let printCom = JpcEx.createNew();
                    rptTpl[JV.NODE_MAIN_INFO][JV.NODE_PAGE_INFO][JV.PROP_PAGE_SIZE] = pageSize;
                    let defProperties = rptUtil.getReportDefaultCache();
                    printCom.initialize(rptTpl);
                    printCom.analyzeData(rptTpl, tplData, defProperties);
                    let maxPages = printCom.totalPages;
                    let pageRst = printCom.outputAsSimpleJSONPageArray(rptTpl, tplData, 1, maxPages, defProperties);
                    if (pageRst) {
                        rpt_xl_util.exportExcel(pageRst, rptName, null, function(newName){
                            res.setHeader('Content-Type', 'application/vnd.openxmlformats');
                            res.setHeader("Content-Disposition", "attachment; filename=" + strUtil.getPinYinCamelChars(rptName) + ".xlsx");
                            let filestream = fs.createReadStream(__dirname.slice(0, __dirname.length - 28) + '/tmp/' + newName + '.xlsx');
                            filestream.on('data', function(chunk) {
                                res.write(chunk);
                            });
                            filestream.on('end', function() {
                                res.end();
                            });
                        });
                    } else {
                        callback(req, res, "Have errors while on going...", null);
                    }
                } else {
                    callback(req, res, 'No report data were found!', null);
                }
            }
        );
    }
};