const Koa = require('koa')
const app = new Koa()
const views = require('koa-views')
const json = require('koa-json')
const onerror = require('koa-onerror')
const bodyparser = require('koa-bodyparser')
const logger = require('koa-logger')
const cors = require('koa2-cors')
// const koajwt = require('koa-jwt')

const index = require('./routes/index')
const users = require('./routes/users')
const article = require('./routes/article')

// error handler
onerror(app)

// middlewares
app.use(bodyparser({
  enableTypes:['json', 'form', 'text']
}))
app.use(json())
app.use(logger())
app.use(require('koa-static')(__dirname + '/public'))
// app.use((ctx, next) => {
//   return next().catch((err) => {
//     if (401 == err.status) {
//       ctx.status = 401;
//       ctx.body = 'Protected resource, use Authorization header to get access\n';
//     } else {
//       throw err;
//     }
//   });
// });
// app.use(koajwt({
//   secret: 'token'
// }).unless({
//   path: [/^\/users\/login/, /^\/users\/register/, /^\/article/]
// }))

app.use(views(__dirname + '/views', {
  extension: 'pug'
}))

app.use(cors({
  origin: (ctx) => {
    return '*'
  },
  maxAge: 5,
  credentials: true,
  allowMethods: ['GET', 'POST', 'PUT', 'DELETE', 'OPTIONS'],
  allowHeaders: ['Content-Type', 'Authorization', 'Accept'],
  exposeHeaders: ['WWW-Authenticate', 'Server-Authenticate']
}))

// logger
app.use(async (ctx, next) => {
  const start = new Date()
  await next()
  const ms = new Date() - start
  console.log(`${ctx.method} ${ctx.url} - ${ms}ms`)
})

// routes
app.use(index.routes(), index.allowedMethods())
app.use(users.routes(), users.allowedMethods())
app.use(article.routes(), article.allowedMethods())

// error-handling
app.on('error', (err, ctx) => {
  console.error('server error', err, ctx)
});

module.exports = app