const Koa = require('koa')
const app = new Koa()
const path = require('path')
const debug = require('debug')('koa-weapp')
const response = require('./middlewares/response')
const bodyParser = require('koa-bodyparser')
const config = require('./config')
const koastatic = require('koa-static')
const convert = require('koa-convert')
const staticCache = require('koa-static-cache')
const compress = require('koa-compress')
const cors = require('koa2-cors')

// 跨域设置
app.use(convert(cors({
    origin: function(ctx) {
        return '*' // 本地环境
    },
    allowMethods: ['POST', 'GET', 'OPTIONS']
})))

// 使用响应处理中间件
app.use(response)

// 解析请求体
app.use(bodyParser())

// 中间件 设置gzip
app.use(compress({
    threshold: 2048,
    flush: require("zlib").Z_SYNC_FLUSH
}))

// 静态文件服务
app.use(convert(staticCache(path.join(__dirname, 'public'), {
    maxAge: 365 * 24 * 60 * 60,
    dynamic: true // 动态添加的文件做缓存
})))

// 引入路由分发
const router = require('./routes')
app.use(router.routes())

// 启动程序，监听端口
app.listen(config.port, () => debug(`listening on port ${config.port}`))