//var app = require('../app');
var debug = require('debug')('demo:server');
var http = require('http');


const Koa = require('koa');
const app = new Koa();
const router = require('koa-router')();
const views = require('koa-views');//把html也写进js中很不方便，所以此模块能引入其他模板，（这里我引入的是ejs）
const co = require('co');
const convert = require('koa-convert');//转化es5和es6语法，为了兼容
const json = require('koa-json');//美化json,{ foo: 'bar' }转化为{"foo":"bar"}
const onerror = require('koa-onerror');
const bodyparser = require('koa-bodyparser')(); //让服务器能够接受到从客服端以post方式发送来的数据，用来提交表单，发送json数据，上传文件，Post请求可以发送大的数据，xml数据没办法通过koa-bodyparse解析，有另一个中间件koa-xml-body
const logger = require('koa-logger'); //方便开发测试查看数据，例如get、post请求就能打印出来在dos界面中




// middlewares
app.use(convert(bodyparser));
app.use(convert(json()));
app.use(convert(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}ms111`);
});





router.get('/',async (ctx,next) => {
    await ctx.render('index',{
        title:'111111'
    })
})


router.get('/user',async (ctx,next) => {
    await ctx.render('index',{
        title:'111111userbbb'
    })
})



app.use(router.routes(), router.allowedMethods());
// response

app.on('error', function(err, ctx){
  console.log(err)
  logger.error('server error', err, ctx);
});


//module.exports = app;





var server = http.createServer(app.callback()).listen(3000)

server.on('error', onError);
server.on('listening', onListening);


function onError(error) {
    if (error.syscall !== 'listen') {
        throw error;
    }

    var bind = typeof port === 'string'
        ? 'Pipe ' + port
        : 'Port ' + port;

    // handle specific listen errors with friendly messages
    switch (error.code) {
        case 'EACCES':
            console.error(bind + ' requires elevated privileges');
            process.exit(1);
            break;
        case 'EADDRINUSE':
            console.error(bind + ' is already in use');
            process.exit(1);
            break;
        default:
            throw error;
    }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
    var addr = server.address();
    var bind = typeof addr === 'string'
        ? 'pipe ' + addr
        : 'port ' + addr.port;
    debug('Listening on ' + bind);
}