const path = require('path')
const express = require('express')
const { uploadDir } = require('./lib/upload')
const { fail } = require('./lib/http')

const app = express()
const publicDir = path.join(__dirname, 'public')

app.disable('x-powered-by')
app.use(express.json({ limit: '1mb' }))
app.use('/static/uploads', express.static(uploadDir, { maxAge: '7d' }))
app.use('/static', express.static(publicDir))

app.use('/api/admin', require('./routes/admin'))
app.use('/api', require('./routes/public'))

app.get('/admin', (req, res) => res.sendFile(path.join(publicDir, 'admin.html')))
app.get('/', (req, res) => res.redirect('/admin'))

app.use('/api', (req, res) => fail(res, 404, '接口不存在'))

app.use((error, req, res, next) => {
  if (res.headersSent) return next(error)
  if (error.type === 'entity.parse.failed') return fail(res, 400, '请求格式错误')
  if (error.type === 'entity.too.large') return fail(res, 413, '请求内容过大')
  const status = error.status && error.status < 500 ? error.status : 500
  if (status === 500) console.error(error)
  fail(res, status, status === 500 ? '服务器开小差了' : error.message)
})

module.exports = app