'use strict';
require('../common');
const assert = require('assert');
const net = require('net');
const http = require('http');
const url = require('url');
const qs = require('querystring');

let request_number = 0;
let requests_sent = 0;
let server_response = '';
let client_got_eof = false;

const server = http.createServer(function(req, res) {
  res.id = request_number;
  req.id = request_number++;

  if (req.id === 0) {
    assert.strictEqual('GET', req.method);
    assert.strictEqual('/hello', url.parse(req.url).pathname);
    assert.strictEqual('world', qs.parse(url.parse(req.url).query).hello);
    assert.strictEqual('b==ar', qs.parse(url.parse(req.url).query).foo);
  }

  if (req.id === 1) {
    assert.strictEqual('POST', req.method);
    assert.strictEqual('/quit', url.parse(req.url).pathname);
  }

  if (req.id === 2) {
    assert.strictEqual('foo', req.headers['x-x']);
  }

  if (req.id === 3) {
    assert.strictEqual('bar', req.headers['x-x']);
    this.close();
  }

  setTimeout(function() {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.write(url.parse(req.url).pathname);
    res.end();
  }, 1);

});
server.listen(0);

server.httpAllowHalfOpen = true;

server.on('listening', function() {
  const c = net.createConnection(this.address().port);

  c.setEncoding('utf8');

  c.on('connect', function() {
    c.write('GET /hello?hello=world&foo=b==ar HTTP/1.1\r\n\r\n');
    requests_sent += 1;
  });

  c.on('data', function(chunk) {
    server_response += chunk;

    if (requests_sent === 1) {
      c.write('POST /quit HTTP/1.1\r\n\r\n');
      requests_sent += 1;
    }

    if (requests_sent === 2) {
      c.write('GET / HTTP/1.1\r\nX-X: foo\r\n\r\n' +
              'GET / HTTP/1.1\r\nX-X: bar\r\n\r\n');
      // Note: we are making the connection half-closed here
      // before we've gotten the response from the server. This
      // is a pretty bad thing to do and not really supported
      // by many http servers. Node supports it optionally if
      // you set server.httpAllowHalfOpen=true, which we've done
      // above.
      c.end();
      assert.strictEqual(c.readyState, 'readOnly');
      requests_sent += 2;
    }

  });

  c.on('end', function() {
    client_got_eof = true;
  });

  c.on('close', function() {
    assert.strictEqual(c.readyState, 'closed');
  });
});

process.on('exit', function() {
  assert.strictEqual(4, request_number);
  assert.strictEqual(4, requests_sent);

  const hello = new RegExp('/hello');
  assert.notStrictEqual(null, hello.exec(server_response));

  const quit = new RegExp('/quit');
  assert.notStrictEqual(null, quit.exec(server_response));

  assert.strictEqual(true, client_got_eof);
});