'use strict';

/**
 * 指标节点业务类
 *
 * @author Mai
 * @date 2018/4/19
 * @version
 */

const paramCode = ['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
    'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 'aa', 'ab', 'ac', 'ad', 'ae', 'af',
    'ag', 'ah', 'ai', 'aj', 'ak', 'al', 'am', 'an', 'ao', 'ap', 'aq', 'ar', 'as', 'at', 'au',
    'av', 'aw', 'ax', 'ay', 'az'];
const defaultGlobalParams = [
    {
        template_id: 1,
        node_id: 0,
        param_id: 1,
        code: 'g_a',
        name: '公路基本造价',
    },{
        template_id: 1,
        node_id: 0,
        param_id: 2,
        code: 'g_b',
        name: '建安费',
    },{
        template_id: 1,
        node_id: 0,
        param_id: 3,
        code: 'g_c',
        name: '工程建设其他费用',
    },{
        template_id: 1,
        node_id: 0,
        param_id: 4,
        code: 'g_d',
        name: '路线总长度（主线长度）',
    },{
        template_id: 1,
        node_id: 0,
        param_id: 5,
        code: 'g_e',
        name: '建筑总面积{路线总长度（主线长度）×路基（或桥隧）宽度}',
    },{
        template_id: 1,
        node_id: 0,
        param_id: 6,
        code: 'g_f',
        name: '路基长度（指不含桥梁、隧道的路基长度（双幅平均计））',
    },
];
module.exports = app => {
    class TemplateNode extends app.BaseService {

        /**
         * 构造函数
         *
         * @param {Object} ctx - egg全局context
         * @return {void}
         */
        constructor(ctx) {
            super(ctx);
            this.tableName = 'template_node';
        }

        /**
         * 从计算规则中解析出指标参数
         * @param {String} rule - 指标规则
         * @param {Number} nodeId - 指标节点id
         * @param {Array} params - 参数列表
         * @returns {*[]}
         * @private
         */
        _parseParam(rule, nodeId, params) {
            if (rule === '') { return; }
            const self = this;
            const ruleParams = rule.split('/');
            const nodeParams = params.filter(function (p) {
                return p.node_id === nodeId;
            });
            const addParam = function (paramName) {
                if (paramName === '') { return ''; }
                let param = self.ctx.helper.findObj(defaultGlobalParams, 'name', paramName);
                if (!param) {
                    param = self.ctx.helper.findObj(nodeParams, 'name', paramName);
                }
                if (!param) {
                    const newParam = {
                        template_id: 1,
                        node_id: nodeId,
                        param_id: nodeParams.length + 1,
                        code: paramCode[nodeParams.length],
                        name: paramName,
                    };
                    nodeParams.push(newParam);
                    params.push(newParam);
                    return newParam.code;
                } else {
                    return param.code;
                }
            }
            if (ruleParams.length > 1) {
                const paramName1 = ruleParams[0];
                const paramCode1 = addParam(paramName1);
                const paramName2 = ruleParams.slice(1, ruleParams.length).join('/');
                const paramCode2 = addParam(paramName2);
                return [paramCode1 +  '/' + paramCode2,
                    paramCode1 + '(' + paramName1 + ')' + '/' + paramCode2 + '(' + paramName2 + ')'];
            } else {
                const paramCode = addParam(rule);
                return [paramCode, paramCode + '(' + rule + ')'];
            }
        }
        /**
         * 查找父节点（根据编号），忽略大小写
         * e.g. z1(z), z1-e(z1), z1-e-a(z1-e)
         * @param code
         * @param nodes
         * @returns {*}
         * @private
         */
        _findParentId(code, nodes) {
            if (nodes.length === 0) { return -1; }
            const codeList = code.split('-');
            if (codeList.length > 1) {
                codeList.splice(codeList.length - 1);
                const parentCode = codeList.join('-');
                for (const node of nodes) {
                    if (parentCode.toLowerCase() === node.code.toLowerCase()) {
                        return node.node_id;
                    }
                }
            } else {
                for (const node of nodes) {
                    if (code.toLowerCase().search(node.code.toLowerCase()) === 0) {
                        return node.node_id;
                    }
                }
            }
        }
        /**
         * 解析一个Excel工作表内的全部 指标节点 和 指标
         * @param {Object} excelSheet
         * @param {Array} nodes - 解析后的指标节点
         * @param {Array} indexes - 解析后的指标
         * @private
         */
        _parseSheetData(excelSheet, nodes, indexes, params) {
            for (const row of excelSheet.data) {
                if (!row[0]) { continue; }
                if (this.ctx.helper.ValidTemplateNodeCode(row[0])) {
                    if (!this.ctx.helper.findObj(nodes, 'code', row[0])) {
                        const node = {
                            template_id: 1,
                            node_id: nodes.length + 1,
                            node_pid: this._findParentId(row[0], nodes) || -1,
                            code: row[0],
                            name: row[1],
                        };
                        nodes.push(node);
                    }
                } else if (this.ctx.helper.ValidTemplateIndexCode(row[0])) {
                    const index = {
                        code: row[0],
                        name: row[1],
                        unit1: row[2],
                        unit2: row[3],
                        node_id: nodes.length,
                        index_id: indexes.length + 1,
                        rule: row[9]
                    };
                    if (row[4] === '√') {
                        index.index_type = 1;
                    } else if (row[5] === '√') {
                        index.index_type = 2;
                    } else if (row[6] === '√') {
                        index.index_type = 3;
                    } else if (row[7] === '√') {
                        index.index_type = 4;
                    }
                    [index.calc_rule, index.parse_rule] = this._parseParam(index.rule, index.node_id, params);
                    indexes.push(index);
                }
            }
        }

        /**
         * 导入Excel数据
         *
         * @param {Array} excelSheets - Excel文件中的全部工作表
         * @returns {Promise<boolean>}
         */
        async importData(excelSheets) {
            let result = false;
            const limit = 30000;
            const transaction = await this.db.beginTransaction();
            try {
                const nodes = [], indexes = [], params = [];
                for (const sheet of excelSheets) {
                    this._parseSheetData(sheet, nodes, indexes, params);
                }

                if (nodes.length > 0) {
                    await transaction.delete(this.tableName, {template_id: 1});
                    const insertResult = await transaction.insert(this.tableName, nodes);
                    if (insertResult.affectedRows !== nodes.length) {
                        throw '导入指标节点错误';
                    }
                    await this.ctx.service.templateIndex.importData(indexes, transaction);
                    await this.ctx.service.templateParam.importData(params.concat(defaultGlobalParams), transaction);
                } else {
                    throw 'Excel文件中无标准的指标数据';
                }

                await transaction.commit();
                result = true;
            } catch(err) {
                await transaction.rollback();
                throw err;
            }
            return result;
        }

    }

    return TemplateNode;
};