'use strict';

const assert = require('assert');
const Service = require('egg').Service;
class ColumnService extends Service {
  constructor(ctx) {
    super(ctx);
    this.model = this.ctx.model.Column;
    this.content = this.ctx.model.Content;
    this.menu = this.ctx.model.Menu;
    this.imgnews = this.ctx.model.Imgnews;
  }
  async create({ name, code }) {
    assert(name, '名称不存在');
    assert(code, '编码不存在');
    try {
      const res = await this.model.findOne({ code });
      if (res) return { errcode: -1001, errmsg: '编码已存在', data: '' };
      const item = await this.model.create({ name, code });
      return { errcode: 0, errmsg: '', data: item };
    } catch (error) {
      throw error;
    }
  }
  async update({ id, name }) {
    assert(id, 'id不存在');
    try {
      const res = await this.model.findOne({ _id: id });
      if (!res) return { errcode: -1001, errmsg: '数据不存在', data: '' };
      await this.model.updateOne({ _id: id }, { name });
      return { errcode: 0, errmsg: '', data: 'update' };
    } catch (error) {
      throw error;
    }
  }
  async delete({ id }) {
    assert(id, 'id不存在');
    try {
      const res = await this.model.findOne({ _id: id });
      if (!res) return { errcode: -1001, errmsg: '数据不存在', data: '' };
      const content = await this.content.findOne({ bind: res.code });
      const menu = await this.menu.findOne({ column: res.code });
      const imgnews = await this.imgnews.findOne({ column: res.code });
      if (content || menu || imgnews) {
        let errmsg = '';
        if (content) errmsg += '（内容）';
        if (menu) errmsg += '（菜单）';
        if (imgnews) errmsg += '（图片新闻）';
        return { errcode: -1001, errmsg: `存在${errmsg}绑定关系，不能删除`, data: '' };
      }
      await this.model.remove({ _id: id });
      return { errcode: 0, errmsg: '', data: 'delete' };
    } catch (error) {
      throw error;
    }
  }
  async query({ skip, limit, code, name }) {
    const filter = {};
    if (name || code) filter.$or = [];
    if (code) filter.$or.push({ code: { $regex: code } });
    if (name) filter.$or.push({ name: { $regex: name } });
    try {
      let res;
      const total = await this.model.find({ ...filter });
      if (skip && limit) {
        res = await this.model.find({ ...filter }).skip(Number(skip) * Number(limit)).limit(Number(limit));
      } else {
        res = await this.model.find({ ...filter });
      }
      return { errcode: 0, errmsg: '', data: res, total: total.length };
    } catch (error) {
      throw error;
    }
  }
}

module.exports = ColumnService;