'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 compilationModel = mongoose.model('compilation');
const _ = require('lodash');
const zhLibID = 'cf851660-3534-11ec-9641-2da8021b8e4e';
const cqLibID = '90c51220-a740-11e8-a354-ab5db7d42428';
module.exports = {
    handleCopyItems,
    getComBillsLibInfo,
    getBillsGuideLibs,
    initBillsGuideLib,
    updateBillsGuideLib,
    getLibWithBills,
    getItemsBybills,
    updateItems,
    testItems
};

function setChildren(bill, parentMap) {
    let children = parentMap[bill.ID];
    if (children) {
        for (let c of children) {
            setChildren(c, parentMap);
        }
        bill.children = children;
    } else {
        bill.children = [];
    }
}

function sortChildren(lists) {
    let IDMap = {},
        nextMap = {},
        firstNode = null,
        newList = [];
    for (let l of lists) {
        if (l.children && l.children.length > 0) l.children = sortChildren(l.children); //递规排序
        IDMap[l.ID] = l;
        if (l.NextSiblingID != -1) nextMap[l.NextSiblingID] = l;
    }
    for (let t of lists) {
        if (!nextMap[t.ID]) { //如果在下一节点映射没找到，则是第一个节点
            firstNode = t;
            break;
        }
    }
    if (firstNode) {
        newList.push(firstNode);
        delete IDMap[firstNode.ID];
        setNext(firstNode, newList);
    }
    //容错处理，如果链断了的情况，直接添加到后面
    for (let key in IDMap) {
        if (IDMap[key]) newList.push(IDMap[key])
    }
    return newList;

    function setNext(node, array) {
        if (node.NextSiblingID != -1) {
            let next = IDMap[node.NextSiblingID];
            if (next) {
                array.push(next);
                delete IDMap[next.ID];
                setNext(next, array);
            }
        }
    }
}

function getItemFromChildren(children, allItems) {
    for (let i = 0; i < children.length; i++) {
        const cur = children[i];
        const next = children[i + 1];
        cur.NextSiblingID = next && next.ID || -1;
        allItems.push(cur);
        if (cur.children && cur.children.length) {
            getItemFromChildren(cur.children, allItems);
        }
    }
}

function resetTreeData(billsList) {
    const idMapping = {};
    idMapping['-1'] = -1;
    // 建立新ID-旧ID映射
    billsList.forEach(bills => idMapping[bills.ID] = uuidV1());
    billsList.forEach(function (bills) {
        bills.ID = idMapping[bills.ID] ? idMapping[bills.ID] : -1;
        bills.ParentID = idMapping[bills.ParentID] ? idMapping[bills.ParentID] : -1;
        bills.NextSiblingID = idMapping[bills.NextSiblingID] ? idMapping[bills.NextSiblingID] : -1;
    });
}

// 从某库中根据清单编号拷贝工艺
async function handleCopyItems(sourceGuideLibID, sourceBillsLibID, targetGuideLibID, targetBillsLibID) {
    const sourceBills = await stdBillsModel.find({ billsLibId: sourceBillsLibID, deleted: false }, '-_id ID code').lean();
    const targetBills = await stdBillsModel.find({ billsLibId: targetBillsLibID, deleted: false }, '-_id ID code').lean();
    const sourceItems = await billsGuideItemsModel.find({ libID: sourceGuideLibID, type: 0, deleted: false }, '-_id').lean(); // 过滤掉定额项
    const targetCodeIDMap = {};
    targetBills.forEach(bills => targetCodeIDMap[bills.code] = bills.ID);
    const toDeleteIDList = [];
    const insertBulks = [];
    sourceBills.forEach(bills => {
        const matchedItems = sourceItems.filter(item => item.billsID === bills.ID);
        // 重新将断缺的树结构数据整理好
        if (matchedItems.length) {
            const parentMap = {};
            matchedItems.forEach(item => {
                (parentMap[item.ParentID] || (parentMap[item.ParentID] = [])).push(item);
            });
            const roots = parentMap['-1'];
            roots.forEach(root => setChildren(root, parentMap));
            const sorted = sortChildren(roots);
            const newItems = [];
            getItemFromChildren(sorted, newItems);
            resetTreeData(newItems);
            const targetBillsID = targetCodeIDMap[bills.code];
            if (targetBillsID) {
                toDeleteIDList.push(targetBillsID);
                newItems.forEach(newItem => {
                    newItem.libID = targetGuideLibID;
                    newItem.billsID = targetBillsID;
                    insertBulks.push({
                        insertOne: { document: newItem }
                    });
                })
            }
        }
    });
    if (toDeleteIDList.length) {
        await billsGuideItemsModel.remove({ libID: targetGuideLibID, billsID: { $in : toDeleteIDList } });
    }
    if (insertBulks.length) {
        await billsGuideItemsModel.bulkWrite(insertBulks);
    }
    
}

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, isTemporary) {
    if (isTemporary) {
        const libs = await billsGuideLibModel.find({ ID: { $in: [zhLibID, cqLibID] } }).lean();
        return libs;
    }
    return await billsGuideLibModel.find(findData);
}

// 如果是“重庆费用定额(2018)”，则默认叶子清单的项目指引窗口只有一条数据，取清单名称。
async function genGuidanceItems_cq18(guidanceLibId, billsLibId) {
    let bills = await stdBillsModel.find({billsLibId: billsLibId, deleted: false, 'jobs.0': {$exists: true}});
    let insertArr = [];
    for(let bill of bills){
        let newItem = {
            libID: guidanceLibId,
            ID: uuidV1(), ParentID: -1,
            NextSiblingID: -1,
            name: bill.name,
            type: 0,
            billsID: bill.ID
        };
        insertArr.push({insertOne: {document: newItem}});
    }
    await billsGuideItemsModel.bulkWrite(insertArr);
}

//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);
    let compilation = await compilationModel.findOne({_id: mongoose.Types.ObjectId(updateData.compilationId)});
    if (compilation &&
        compilation.overWriteUrl &&
        compilation.overWriteUrl === '/web/over_write/js/chongqing_2018.js') {
        await genGuidanceItems_cq18(updateData.ID, updateData.billsLibId);
    } else {
        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});
    if(guidanceLib.length === 0){
        throw '不存在此指引库！';
    }
    let billsLib = await stdBillsLibModel.findOne({billsLibId: guidanceLib[0].billsLibId});
    if(!billsLib){
        throw '引用的清单规则库不存在！';
    }
    let bills = await stdBillsModel.find({billsLibId: billsLib.billsLibId}, '-_id code name ID NextSiblingID ParentID jobs items comment').lean();
    const guideItems = await billsGuideItemsModel.find({ libID: guidanceLib[0].ID }, '-_id billsID').lean();
    const billsMap = {};
    for (const item of guideItems) {
        billsMap[item.billsID] = true;
    }
    for (const item of bills) {
        if (billsMap[item.ID]) {
            item.hasGuide = true;
        }
    }
    
    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);
    }
}

async function testItems(libID) {
    let items = await billsGuideItemsModel.find({libID: libID});
    //删除垃圾数据
    let delBulk = [];
    let itemsMapping = {};
    for(let item of items){
        itemsMapping[item.ID] = true;
    }
    for(let item of items){
        if(item.ParentID != -1 && !itemsMapping[item.ParentID]){
            delBulk.push({
                deleteOne: {
                    filter: {ID: item.ID}
                }
            });
        }
    }
    if(delBulk.length > 0){
        console.log(`delBulk.length`);
        console.log(delBulk.length);
        await billsGuideItemsModel.bulkWrite(delBulk);
    }
 /*   //查找同层节点含有相同NextSiblingID的节点
    let rst = [];
    let billsGroup = {};
    for(let item of items){
        if(!billsGroup[item.billsID]){
            billsGroup[item.billsID] = [item];
        }
        else {
            billsGroup[item.billsID].push(item);
        }
    }
    for(let bGroup in billsGroup){
        let group = billsGroup[bGroup];
        let parentGroup = {};
        for(let gItem of group){
            if(!parentGroup[gItem.ParentID]){
                parentGroup[gItem.ParentID] = [gItem]
            }
            else {
                parentGroup[gItem.ParentID].push(gItem);
            }
        }
        for(let pGroup in parentGroup){
            let pGroupData = parentGroup[pGroup];
            let nextGroup = {};
            for(let nItem of pGroupData){
                let sameNext = _.filter(pGroupData, {NextSiblingID: nItem.NextSiblingID});
                if(sameNext.length > 1){
                    console.log(`sameNext`);
                    console.log(sameNext);
                    if(!nextGroup[nItem.ParentID + nItem.NextSiblingID]){
                        rst.push({NextSiblingID: nItem.NextSiblingID, ParentID: nItem.ParentID});
                        nextGroup[nItem.ParentID + nItem.NextSiblingID] = 1;
                    }
                }
            }
        }

    }*/
    return delBulk.length;
}