'use strict';

/**
 *
 *
 * @author Mai
 * @date
 * @version
 */

const TreeService = require('./base_tree_service');
// sql拼装器
const rootId = -1;

class BaseBillsSerivce extends TreeService {

    /**
     * 从标准数据中提取有效数据
     * @param {Object} stdData - 从标准库中查询所得
     * @returns {name, unit, source, code, b_code}
     * @private
     */
    _filterStdData(stdData) {
        const result = {
            name: stdData.name,
            unit: stdData.unit,
            source: stdData.source,
            node_type: stdData.node_type,
        };
        result.code = stdData.code ? stdData.code : '';
        result.b_code = stdData.b_code ? stdData.b_code : '';
        return result;
    }

    async addBillsNode(tenderId, selectId, data, reviseId) {
        if (data) {
            if (reviseId) data.crid = reviseId;
            return await this.addNode(tenderId, selectId, data);
        } else {
            return await this.addNode(tenderId, selectId, {crid: reviseId});
        }
    }

    /**
     * 新增子节点，并排在所有子节点的末尾
     * @param {Number} tenderId - 标段Id
     * @param {Number} selectId - 父节点Id
     * @param {Object} data - 新增节点数据（编号名称等）
     * @returns {Promise<*>}
     */
    async addChild(tenderId, selectId, data, reviseId) {
        if ((tenderId <= 0) || (selectId <= 0)) {
            return [];
        }
        const selectData = await this.getDataByKid(tenderId, selectId);
        if (!selectData) {
            throw '新增节点数据错误';
        }
        const children = await this.getChildrenByParentId(tenderId, selectId);

        const maxId = await this._getMaxLid(tenderId);

        data.id = this.uuid.v4();
        data.tender_id = tenderId;
        data.ledger_id = maxId + 1;
        data.ledger_pid = selectData.ledger_id;
        data.level = selectData.level + 1;
        data.order = children.length + 1;
        data.full_path = selectData.full_path + '-' + data.ledger_id;
        data.is_leaf = true;
        if (reviseId) data.crid = reviseId;

        this.transaction = await this.db.beginTransaction();
        try {
            const result = await this.transaction.insert(this.tableName, data);
            if (children.length === 0) {
                await this.transaction.update(this.tableName,
                    {is_leaf: false, quantity: null, unit_price: null, total_price: null, deal_qty: null, deal_tp: null},
                    { where: {tender_id: tenderId, ledger_id: selectData.ledger_id} });
            }
            await this.transaction.commit();
        } catch(err) {
            this.transaction.rollback();
            throw err;
        }

        this._cacheMaxLid(tenderId, maxId + 1);

        // 查询应返回的结果
        const resultData = {};
        resultData.create = await this.getDataByKid(tenderId, data.ledger_id);
        if (children.length === 0) {
            resultData.update = await this.getDataByKid(tenderId, selectId);
        }
        return resultData;
    }

    /**
     * 添加节点(来自标准清单)
     * @param {Number} tenderId
     * @param {Number} selectId
     * @param {Object} stdData
     * @return {Promise<*>}
     */
    async addStdNode(tenderId, selectId, stdData, reviseId) {
        const newData = this._filterStdData(stdData);
        const result = await this.addBillsNode(tenderId, selectId, newData, reviseId);
        return result;
    }

    /**
     * 添加标准节点，将选择的标准节点，添加为子节点（排序为末尾）
     * @param {Number} tenderId - 标段Id
     * @param {Number} selectId - 添加目标节点Id
     * @param {Object} stdData - 标准节点数据
     * @returns {Promise<*>}
     */
    async addStdNodeAsChild(tenderId, selectId, stdData, reviseId) {
        const newData = this._filterStdData(stdData);
        const result = await this.addChild(tenderId, selectId, newData, reviseId);
        return result;
    }

    /**
     * 根据parentData, data新增数据(新增为parentData的最后一个子项)
     * @param {Number} tenderId - 标段id
     * @param {Object} parentData - 父项数据
     * @param {Object} data - 新增节点，初始数据
     * @return {Promise<*>} - 新增结果
     * @private
     */
    async _addChildNodeData(tenderId, parentData, data, reviseId) {
        if (tenderId <= 0) {
            return undefined;
        }
        if (!data) {
            data = {};
        }
        const pid = parentData ? parentData.ledger_id : rootId;

        const maxId = await this._getMaxLid(tenderId);

        data.id = this.uuid.v4();
        data.tender_id = tenderId;
        data.ledger_id = maxId + 1;
        data.ledger_pid = pid;
        if (data.order === undefined) {
            data.order = 1;
        }
        data.level = parentData ? parentData.level + 1 : 1;
        data.full_path = parentData ? parentData.full_path + '-' + data.ledger_id : '' + data.ledger_id;
        if (data.is_leaf === undefined) {
            data.is_leaf = true;
        }
        if (reviseId) data.crid = reviseId;
        const result = await this.transaction.insert(this.tableName, data);

        this._cacheMaxLid(tenderId, maxId + 1);

        return [result, data];
    }

    /**
     * 根据parentData, data新增数据(自动排序)
     * @param tenderId
     * @param parentData
     * @param data
     * @return {Promise<void>}
     * @private
     */
    async _addChildAutoOrder(tenderId, parentData, data, reviseId) {
        const self = this;
        const findPreData = function(list, a) {
            if (!list || list.length === 0) { return null; }
            for (let i = 0, iLen = list.length; i < iLen; i++) {
                if (self.ctx.helper.compareCode(list[i].code, a.code) > 0) {
                    return i > 0 ? list[i - 1] : null;
                }
            }
            return list[list.length - 1];
        };

        const pid = parentData ? parentData.ledger_id : rootId;
        const children = await this.getChildrenByParentId(tenderId, pid);
        const preData = findPreData(children, data);
        if (!preData || children.indexOf(preData) < children.length - 1) {
            await this._updateChildrenOrder(tenderId, pid, preData ? preData.order + 1 : 1);
        }
        data.order = preData ? preData.order + 1 : 1;
        const [addResult, node] = await this._addChildNodeData(tenderId, parentData, data, reviseId);

        return [addResult, node];
    }

    /**
     * 添加节点，并同步添加父节点
     * @param {Number} tenderId - 标段id
     * @param {Number} selectId - 选中节点id
     * @param {Object} stdData - 节点数据
     * @param {StandardLib} stdLib - 标准库
     * @return {Promise<void>}
     */
    async addStdNodeWithParent(tenderId, stdData, stdLib, reviseId) {
        // 查询完整标准清单，并按层次排序
        const fullLevel = await stdLib.getFullLevelDataByFullPath(stdData.list_id, stdData.full_path);
        fullLevel.sort(function(x, y) {
            return x.level - y.level;
        });

        let isNew = false,
            node,
            firstNew,
            updateParent,
            addResult;
        const expandIds = [];
        this.transaction = await this.db.beginTransaction();
        try {
            // 从最顶层节点依次查询是否存在，否则添加
            for (let i = 0, len = fullLevel.length; i < len; i++) {
                const stdNode = fullLevel[i];

                if (isNew) {
                    const newData = this._filterStdData(stdNode);
                    newData.is_leaf = (i === len - 1);
                    [addResult, node] = await this._addChildNodeData(tenderId, node, newData, reviseId);
                } else {
                    const parent = node;
                    node = await this.getDataByCondition({
                        tender_id: tenderId,
                        ledger_pid: parent ? parent.ledger_id : rootId,
                        code: stdNode.code,
                        name: stdNode.name,
                    });
                    if (!node) {
                        isNew = true;
                        const newData = this._filterStdData(stdNode);
                        newData.is_leaf = (i === len - 1);
                        [addResult, node] = await this._addChildAutoOrder(tenderId, parent, newData, reviseId);
                        if (parent && parent.is_leaf) {
                            await this.transaction.update(this.tableName, { id: parent.id, is_leaf: false,
                                unit_price: null, quantity: null, total_price: null, deal_qty: null, deal_tp: null});
                            updateParent = parent;
                        }
                        firstNew = node;
                    } else {
                        expandIds.push(node.ledger_id);
                    }
                }
            }
            await this.transaction.commit();
        } catch (err) {
            await this.transaction.rollback();
            throw err;
        }

        // 查询应返回的结果
        let createData = [],
            updateData = [];
        if (firstNew) {
            createData = await this.getDataByFullPath(tenderId, firstNew.full_path + '%');
            updateData = await this.getNextsData(tenderId, firstNew.ledger_pid, firstNew.order);
            if (updateParent) {
                updateData.push(await this.getDataByCondition({ id: updateParent.id }));
            }
        }
        return { create: createData, update: updateData };
    }

}

module.exports = BaseBillsSerivce;