'use strict';

const assert = require('assert');
const moment = require('moment');
const Service = require('egg').Service;
class PagesService extends Service {
  constructor(ctx) {
    super(ctx);
    this.model = this.ctx.model.Pages;
    this.menu = this.ctx.model.Menu;
    this.imgnews = this.ctx.model.Imgnews;
  }
  async create({ title, describe, content, code }) {
    assert(title, '标题不存在');
    assert(describe, '描述不存在');
    assert(content, '内容不存在');
    try {
      const res = await this.model.findOne({ code });
      if (res) return { errcode: -1001, errmsg: '编码已存在', data: '' };
      const createAt = moment().format('x');
      const updateAt = moment().format('x');
      const item = await this.model.create({ title, describe, content, code, createAt, updateAt });
      return { errcode: 0, errmsg: '', data: item };
    } catch (error) {
      throw error;
    }
  }
  async update({ id, title, describe, content }) {
    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 updateAt = moment().format('x');
      await this.model.updateOne({ _id: id }, { title, describe, content, updateAt });
      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 menu = await this.menu.findOne({ column: res.code });
      const imgnews = await this.imgnews.findOne({ column: res.code });
      if (menu || imgnews) {
        let errmsg = '';
        if (menu) errmsg += '（菜单）';
        if (imgnews) errmsg += '（图片新闻）';
        return { errcode: -1001, errmsg: `存在${errmsg}绑定关系，不能删除`, data: '' };
      }
      await this.model.remove({ _id: id });
      return { errcode: 0, errmsg: '', data: 'delete' };
    } catch (error) {
      throw error;
    }
  }
  async query({ skip, limit, title, code }) {
    const filter = {};
    if (title || code) filter.$or = [];
    if (title) filter.$or.push({ code: { $regex: title } });
    if (code) filter.$or.push({ code: { $regex: code } });
    try {
      let res;
      const total = await this.model.find({ ...filter }, { content: false });
      if (skip && limit) {
        res = await this.model.find({ ...filter }, { content: false }).skip(Number(skip) * Number(limit)).limit(Number(limit));
      } else {
        res = await this.model.find({ ...filter }, { content: false });
      }
      return { errcode: 0, errmsg: '', data: res, total: total.length };
    } catch (error) {
      throw error;
    }
  }
  async fetch({ id }) {
    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 }, { visit: res.visit + 1 });
      return { errcode: 0, errmsg: '', data: res };
    } catch (error) {
      throw error;
    }
  }
}

module.exports = PagesService;