const http = require('http');
const Koa = require('koa');
const bodyParser = require('koa-bodyparser');
const router = require('koa-router')();
const validate = require('koa2-validation'); // 1. import the koa2-validation
const user = require('./user');
router.post('/users', validate(user.v.addUser), user.addUser);  // 3. setup the validate middleware
router.get('/users/:id', validate(user.v.getUserInfo), user.getUserInfo);
router.get('/users', validate(user.v.getUserList), user.getUserList);
const app = new Koa();
// error handler
app.use(async (ctx, next) => {
  try {
    await next();
  } catch (err) {
    ctx.status = err.status || err.code;
    ctx.body = {
      success: false,
      message: err.message,
    };
  }
});
app.use(bodyParser()); // bodyParser should be before the routers
app.use(router.routes());
const server = http.createServer(app.callback());
module.exports = server;

const _ = require('lodash');
const Joi = require('joi');
const v = {};
exports.v = v;
const users = [{
  id: '001',
  name: 'dennis1',
  age: 18,
}, {
  id: '002',
  name: 'dennis2',
  age: 20,
}];
// 2. define the validation schema
v.addUser = {
  body: {
    id: Joi.string().required(),
    name: Joi.string(),
    age: Joi.number(),
  },
};
exports.addUser = async (ctx) => {
  const user = ctx.request.body;
  users.push(user);
  ctx.body = { success: true, data: users };
};

app.use(async (ctx, next) => {
  try {
    await next();
  } catch (err) {
    ctx.status = err.status || err.code;
    ctx.body = {
      success: false,
      message: err.message,
    };
  }
});