'use strict';


const assert = require('assert');
const _ = require('lodash');
const { ObjectId } = require('mongoose').Types;
const { CrudService } = require('naf-framework-mongoose/lib/service');
const { BusinessError, ErrorCode } = require('naf-core').Error;

class ExperienceService extends CrudService {
  constructor(ctx) {
    super(ctx, 'experience');
    this.model = this.ctx.model.Experience;
  }

  async query(data, { skip = 0, limit = 0 } = {}) {
    let res = await this.model.find(data).populate({ path: 'studentid', select: 'name job' }).skip(parseInt(skip))
      .limit(parseInt(limit));
    if (res.length > 0) {
      res = JSON.parse(JSON.stringify(res));
      res = res.map(i => {
        const { studentid } = i;
        if (studentid && _.isObject(studentid)) {
          const { name, job } = studentid;
          i.stuname = name;
          i.stujob = job;
        }
        return i;
      });
    }
    return res;
  }

  async create(data) {
    const { studentid } = data;
    let res;
    const r = await this.model.findOne({ studentid });
    if (r) {
      const { title, content } = data;
      r.title = title;
      r.content = content;
      res = await r.save();
    } else {
      res = await this.model.create(data);
    }
    return res;
  }

  async exportDocx(data) {
    const { planid, termid, batchid, classid, studentid, id } = data;
    // 从小到大判断
    // res是最后的结果,可能是Object也可能是Array
    // 作者拼接:能直接获取学生姓名,班级名称,需要单独查下期数
    let res;
    let fn = '';
    const trainPlanInfo = async (termid, batchid) => {
      const trainPlan = await this.ctx.model.Trainplan.findOne({ 'termnum._id': ObjectId(termid) });
      if (!trainPlan) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到年度计划信息');
      const { termnum } = trainPlan;
      if (!termnum) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到年度计划的期信息');
      const obj = {};
      if (termid) {
        const term = termnum.id(termid);
        if (term) obj.term = term.term;
        if (batchid) {
          const { batchnum } = term;
          const batch = batchnum.id(batchid);
          if (batch) obj.batch = batch.batch;
        }
      }
      return obj;
    };
    if (id) {
      const r = await this.model.findById(id).populate({ path: 'studentid', select: 'name job' }).populate({ path: 'classid', select: 'name' });
      if (!r) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到指定范围的培训心得');
      const { term } = await trainPlanInfo(r.termid);
      if (term) { r.term = `第${term}期`; }
      res = r;
    } else if (studentid) {
      const r = await this.model.findOne({ studentid }).populate({ path: 'studentid', select: 'name job' }).populate({ path: 'classid', select: 'name' });
      if (!r) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到指定范围的培训心得');
      const { term } = await trainPlanInfo(r.termid);
      if (term) { r.term = `第${term}期`; }
      res = r;
    } else if (classid) {
      let r = await this.model.find({ classid }).populate({ path: 'studentid', select: 'name job' }).populate({ path: 'classid', select: 'name' });
      if (r.length <= 0) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到指定范围的培训心得');
      r = JSON.parse(JSON.stringify(r));
      const h = _.head(r);
      const { term } = await trainPlanInfo(h.termid);
      r = r.map(i => {
        i.term = `第${term}期`;
        return i;
      });
      res = r;
      fn = `第${term}期${h.classid.name.includes('班') ? h.classid.name : `${h.classid.name}班`}培训心得`;
    } else if (batchid) {
      let r = await this.model.find({ batchid }).populate({ path: 'studentid', select: 'name job' }).populate({ path: 'classid', select: 'name' });
      if (r.length <= 0) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到指定范围的培训心得');
      r = JSON.parse(JSON.stringify(r));
      const h = _.head(r);
      const { term, batch } = await trainPlanInfo(h.termid, h.batchid);
      r = r.map(i => {
        i.term = `第${term}期`;
        i.batch = `第${batch}批`;
        return i;
      });
      res = r;
      fn = `第${term}期第${batch}批培训心得`;
    } else if (termid) {
      let r = await this.model.find({ termid }).populate({ path: 'studentid', select: 'name job' }).populate({ path: 'classid', select: 'name' });
      if (r.length <= 0) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到指定范围的培训心得');
      r = JSON.parse(JSON.stringify(r));
      const h = _.head(r);
      const { term } = await trainPlanInfo(h.termid, h.batchid);
      r = r.map(i => {
        i.term = `第${term}期`;
        return i;
      });
      res = r;
      fn = `第${term}期培训心得`;
    } else if (planid) {
      const trainPlan = await this.ctx.model.Trainplan.findById(planid);
      if (!trainPlan) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到指定年度计划信息');
      const { termnum } = trainPlan;
      if (!termnum) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到指定年度计划下的各期信息');
      if (!_.isArray(termnum)) throw new BusinessError(ErrorCode.DATA_INVALID, '年度计划下的期信息数据格式错误');
      const arr = [];
      for (const t of termnum) {
        const dup = JSON.parse(JSON.stringify(t));
        let r = await this.model.find({ termid: dup._id }).populate({ path: 'studentid', select: 'name job' }).populate({ path: 'classid', select: 'name' });
        if (r.length <= 0) continue;
        r = JSON.parse(JSON.stringify(r));
        const h = _.head(r);
        const { term } = await trainPlanInfo(h.termid);
        r = r.map(i => {
          i.term = `第${term}期`;
          return i;
        });
        arr.push(...r);
      }
      res = arr;
      fn = `${trainPlan.title}培训心得`;
    }
    const arr = [];
    if (res && !_.isArray(res)) {
      const docxObj = this.experienceData(res);
      arr.push(docxObj);
      const { author } = docxObj;
      if (author !== '') { fn = `${author}培训心得`; }
    } else if (res && _.isArray(res)) {
      for (const o of res) {
        const docxObj = this.experienceData(o);
        arr.push(docxObj);
      }
    }
    if (res.length <= 0) throw new BusinessError(ErrorCode.DATA_NOT_EXIST, '未找到任何培训心得');
    return await this.ctx.service.util.toDocx(arr, fn);
  }

  experienceData(data) {
    const { title, content, classid, studentid, term } = data;
    let docxObj = { title };
    const cArr = content.split('\n');
    const ncArr = [];
    // cArr内容按回车分行,检查每行内容开始是不是有4个空格(首行缩进),没有就加上
    for (let c of cArr) {
      if (_.isString(c) && !c.startsWith('    ')) {
        c = `    ${_.trim(c)}`;
      }
      ncArr.push(c);
    }
    docxObj = Object.assign(docxObj, { content: ncArr });
    let author = term;
    if (_.isObject(classid)) {
      const { name } = classid;
      if (name) author = `${author}${name.includes('班') ? name : `${name}班`}`;
    }
    if (_.isObject(studentid)) {
      const { name } = studentid;
      if (name) author = `${author}${name.includes('班') ? name : `${name}`}`;
    }
    if (author !== '') {
      docxObj = Object.assign(docxObj, { author });
    }

    return docxObj;
  }

}

module.exports = ExperienceService;