import Koa from 'koa'
import log from './utils/log'
import serve from 'koa-static'
import bodyPaser from 'koa-bodyparser'
import {staticRoot} from './utils/staticResourcePath'
import router from './routers'
import { RouterContext } from 'koa-router';
import assignGlobalFnToCtx from './core/assignGlobalFnToCtx'

const app = assignGlobalFnToCtx(new Koa())

// 记录下请求时间
app.use(async (ctx: RouterContext, next: any) => {
  const startTime = Date.now();
  await next()
  ctx.set('x-responseTime', (Date.now() - startTime).toString())
})

app.use(bodyPaser())
app.use(serve(staticRoot))

app.use(async (ctx: RouterContext, next) => {
  log.success('active:', ctx.url)
  await next()
})

app.use(async (ctx: RouterContext, next) => {
  try {
    await next();
  } catch (err) {
    ctx.status = err.status || 500;
    ctx.body = err;
    ctx.app.emit('error', err, ctx);
  }
});

app.use(router.routes())

export default function start() {
  const port = app.context.legoOption.port
  return app.listen(port, () => {
    log.success(`app started: http://localhost:${port}`);
  });
}

// EXEC_NOW 标志是否立即执行
if (process.env.EXEC_NOW === 'true') {
  start()
}