'use strict';

/**
 *
 *
 * @author Zhong
 * @date 2018/6/1
 * @version
 */
import mongoose from 'mongoose';
import CompilationModel from "../../users/models/compilation_model";
import moment from 'moment';
const uuidV1 = require('uuid/v1');
const billsLibModel = mongoose.model('std_bills_lib_list');
const billsGuideLibModel = mongoose.model('std_billsGuidance_lib');
const billsGuideItemsModel = mongoose.model('std_billsGuidance_items');
const stdBillsLibModel = mongoose.model('std_bills_lib_list');
const stdBillsModel = mongoose.model('std_bills_lib_bills');
const stdBillsJobsModel = mongoose.model('std_bills_lib_jobContent');
const stdRationModel = mongoose.model('std_ration_lib_ration_items');
const engLibModel = mongoose.model('engineering_lib');
const _ = require('lodash');

module.exports = {
    getComBillsLibInfo,
    getBillsGuideLibs,
    initBillsGuideLib,
    updateBillsGuideLib,
    getLibWithBills,
    getItemsBybills,
    updateItems
};

async function getCompilationList() {
    let compilationModel = new CompilationModel();
    return await compilationModel.getCompilationList();
}

async function getComBillsLibInfo() {
    let rst = {compilationList: [], billsLibs: []};
    let compilationList = await getCompilationList();
    if(compilationList.length <= 0){
        throw '没有数据';
    }
    else{
        for(let compilation of compilationList){
            rst.compilationList.push({_id: compilation._id, name: compilation.name});
        }
        rst.billsLibs = await billsLibModel.find({deleted: false}, '-_id billsLibId billsLibName');
        return rst;
    }
}

async function getBillsGuideLibs(findData) {
    return await billsGuideLibModel.find(findData);
}

//拷贝工作内容并转化为树结构，形成项目指引数据
async function genGuidanceItems(guidanceLibId, billsLibId){
    let bills = await stdBillsModel.find({billsLibId: billsLibId, deleted: false, 'jobs.0': {$exists: true}});
    //设置工作内容数据
    let jobIds = [];
    let totalJobs = [];
    for(let bill of bills){
        for(let job of bill.jobs){
            jobIds.push(job.id);
        }
    }
    jobIds = Array.from(new Set(jobIds));
    if(jobIds.length > 0){
        totalJobs = await stdBillsJobsModel.find({deleted: false, id: {$in: jobIds}});
    }
    if(totalJobs.length > 0){
        let jobIdIndex = {};//id索引
        for(let job of totalJobs){
            jobIdIndex[job.id] = job;
        }
        let insertArr = [];
        for(let bill of bills){
            //排序后根据serialNo转换成NextSiblingID,倒序
            bill.jobs.sort(function (a, b) {
                let rst = 0;
                if(a.serialNo > b.serialNo){
                    rst = -1;
                }
                else if(a.serialNo < b.serialNo){
                    rst = 1;
                }
                return rst;
            });
            let jobNoIndex = {};//下标索引
            for(let i = 0; i < bill.jobs.length; i++){
                let newItem = {libID: guidanceLibId, ID: uuidV1(), ParentID: -1, NextSiblingID: jobNoIndex[i - 1] ? jobNoIndex[i - 1]['ID'] : -1,
                    name: jobIdIndex[bill.jobs[i]['id']]['content'], type: 0, billsID: bill.ID};
                jobNoIndex[i] = newItem;
                insertArr.push({insertOne: {document: newItem}});
            }
        }
        await billsGuideItemsModel.bulkWrite(insertArr);
    }
}

async function initBillsGuideLib(updateData){
    await billsGuideLibModel.create(updateData);
    await genGuidanceItems(updateData.ID, updateData.billsLibId);
}

async function updateBillsGuideLib(data) {
    if(data.updateType === 'delete'){
        //删除所有条目
        await billsGuideLibModel.remove(data.findData);
        await billsGuideItemsModel.remove({libID: data.findData.ID});
    }
    else {
        await billsGuideLibModel.update(data.findData, {$set: data.updateData});
        await engLibModel.update({'billsGuidance_lib.id': data.findData.ID}, {$set: {'billsGuidance_lib.$.name': data.updateData.name}}, {multi: true});
    }
}

async function getLibWithBills(libID){
    let guidanceLib = await getBillsGuideLibs({ID: libID, deleted: false});
    if(guidanceLib.length === 0){
        throw '不存在此指引库！';
    }
    let billsLib = await stdBillsLibModel.findOne({billsLibId: guidanceLib[0].billsLibId, deleted: false});
    if(!billsLib){
        throw '引用的清单规则库不存在！';
    }
    let bills = await stdBillsModel.find({billsLibId: billsLib.billsLibId, deleted: false}, '-_id code name ID NextSiblingID ParentID');
    return {guidanceLib: guidanceLib[0], bills};
}

function getAttrs(field, datas){
    let rst = [];
    for(let data of datas){
        if(data[field]){
            rst.push(data[field]);
        }
    }
    return rst;
}

//定额项目指所引用定额是否被删除
function rationAllExist(rationItems, stdRationIdx) {
    for(let item of rationItems){
        if(!stdRationIdx[item.rationID]){
            return false;
        }
    }
    return true;
}

//将同层树结构转为顺序数组
function chainToArr(nodes){
    let rst = [];
    let tempIdx = {};
    let nodeIdx = {};
    //建索引
    for(let node of nodes){
        tempIdx[node.ID] = {ID: node.ID, NextSiblingID: node.NextSiblingID, preSibling: null, nextSibling: null};
        nodeIdx[node.ID] = node;
    }
    //建链
    for(let i in tempIdx){
        let temp = tempIdx[i];
        if(temp.NextSiblingID != -1){
            let next = tempIdx[temp.NextSiblingID];
            temp.nextSibling = next;
            next.preSibling = temp;
        }
    }
    let firstNode = null;
    for(let i in tempIdx){
        if(!tempIdx[i].preSibling){
            firstNode = tempIdx[i];
            break;
        }
    }
    //获得顺序队列
    while(firstNode){
        rst.push(nodeIdx[firstNode.ID]);
        firstNode = firstNode.nextSibling;
    }
    return rst;
}

async function getItemsBybills(guidanceLibID, billsID){
    const type = {job: 0, ration: 1};
    let items = await billsGuideItemsModel.find({libID: guidanceLibID, billsID: billsID, deleted: false});
    let rationItems = _.filter(items, {type: type.ration});
    let rationIds = getAttrs('rationID', rationItems);
    let stdRations = await stdRationModel.find({ID: {$in: rationIds}, $or: [{isDeleted: null}, {isDeleted: false}]});
    let stdRationIndex = {};
    for(let stdRation of stdRations){
        stdRationIndex[stdRation.ID] = stdRation;
    }
    //判断定额完整性
    if(!rationAllExist(rationItems, stdRationIndex)){
        //建定额链, 排序后再清除不存在的定额，保证顺序正确性
        rationItems = chainToArr(rationItems);
        //清除已被删除的定额
        let removeIds = [];
        _.remove(rationItems, function (item) {
            if(!stdRationIndex[item.rationID]){
                removeIds.push(item.ID);
                return true;
            }
            return false;
        });
        _.remove(items, function (item) {
           return removeIds.includes(item.ID);
        });
        await billsGuideItemsModel.remove({ID: {$in: removeIds}});
        //重组树结构
        let bulkArr = [];
        for(let i = 0, len = rationItems.length; i < len; i++){
            rationItems[i].NextSiblingID = rationItems[i + 1] ? rationItems[i + 1].ID : -1;
            bulkArr.push({updateOne: {filter: {ID: rationItems[i].ID}, update: {$set: {NextSiblingID: rationItems[i].NextSiblingID}}}});
        }
        await billsGuideItemsModel.bulkWrite(bulkArr);
    }
    return items;
}

async function updateItems(updateDatas) {
    let bulkArr = [];
    for(let updateData of updateDatas){
        if(updateData.updateType === 'create'){
            bulkArr.push({insertOne: {document: updateData.updateData}});
        }
        else if(updateData.updateType === 'update'){
            bulkArr.push({updateOne: {filter: updateData.findData, update: {$set: updateData.updateData}}});
        }
        else{
            bulkArr.push({deleteOne: {filter: updateData.findData}});
        }
    }
    if(bulkArr.length > 0){
        await billsGuideItemsModel.bulkWrite(bulkArr);
    }
}