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 koajwt = require('koa-jwt')

const index = require('./routes/index')
const users = require('./routes/users')
const errorViewRouter = require('./routes/view/error')

const { SECRET } = require('./conf/constants')

// error handler
let onerrorConf = {}
onerrorConf = {
  redirect: '/error'
}
onerror(app, onerrorConf)

app.use(koajwt({
  secret: SECRET
}).unless({
  path: [/^\/users\/login/] // 自定义哪些目录忽略jwt验证
}))

// middlewares
app.use(bodyparser({
  enableTypes:['json', 'form', 'text']
}))
app.use(json())
app.use(logger())
app.use(require('koa-static')(__dirname + '/public'))

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

// 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())
// 404路由注册在最下面
app.use(errorViewRouter.routes(), errorViewRouter.allowedMethods())


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

module.exports = app