/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining a copy

 * of this software and associated documentation files (the "Software"), to

 * deal in the Software without restriction, including without limitation the

 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

 * sell copies of the Software, and to permit persons to whom the Software is

 * furnished to do so, subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included in

 * all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

 * IN THE SOFTWARE.

 */

#include "uv.h"

#include "task.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define MAX_BYTES 1024 * 1024

static uv_tcp_t server;

static uv_tcp_t client;

static uv_tcp_t incoming;

static int connect_cb_called;

static int close_cb_called;

static int connection_cb_called;

static int bytes_read;

static int bytes_written;

static void close_cb(uv_handle_t* handle) {

  close_cb_called++;

}

static void connect_cb(uv_connect_t* req, int status) {

  int r;

  uv_buf_t buf;

  ASSERT(status == 0);

  connect_cb_called++;

  do {

    buf = uv_buf_init("PING", 4);

    r = uv_try_write((uv_stream_t*) &client, &buf, 1);

    ASSERT(r > 0 || r == UV_EAGAIN);

    if (r > 0) {

      bytes_written += r;

      break;

    }

  } while (1);

  do {

    buf = uv_buf_init("", 0);

    r = uv_try_write((uv_stream_t*) &client, &buf, 1);

  } while (r != 0);

  uv_close((uv_handle_t*) &client, close_cb);

}

static void alloc_cb(uv_handle_t* handle, size_t size, uv_buf_t* buf) {

  static char base[1024];

  buf->base = base;

  buf->len = sizeof(base);

}

static void read_cb(uv_stream_t* tcp, ssize_t nread, const uv_buf_t* buf) {

  if (nread < 0) {

    uv_close((uv_handle_t*) tcp, close_cb);

    uv_close((uv_handle_t*) &server, close_cb);

    return;

  }

  bytes_read += nread;

}

static void connection_cb(uv_stream_t* tcp, int status) {

  ASSERT(status == 0);

  ASSERT(0 == uv_tcp_init(tcp->loop, &incoming));

  ASSERT(0 == uv_accept(tcp, (uv_stream_t*) &incoming));

  connection_cb_called++;

  ASSERT(0 == uv_read_start((uv_stream_t*) &incoming, alloc_cb, read_cb));

}

static void start_server(void) {

  struct sockaddr_in addr;

  ASSERT(0 == uv_ip4_addr("0.0.0.0", TEST_PORT, &addr));

  ASSERT(0 == uv_tcp_init(uv_default_loop(), &server));

  ASSERT(0 == uv_tcp_bind(&server, (struct sockaddr*) &addr, 0));

  ASSERT(0 == uv_listen((uv_stream_t*) &server, 128, connection_cb));

}

TEST_IMPL(tcp_try_write) {

  uv_connect_t connect_req;

  struct sockaddr_in addr;

  start_server();

  ASSERT(0 == uv_ip4_addr("127.0.0.1", TEST_PORT, &addr));

  ASSERT(0 == uv_tcp_init(uv_default_loop(), &client));

  ASSERT(0 == uv_tcp_connect(&connect_req,

                             &client,

                             (struct sockaddr*) &addr,

                             connect_cb));

  ASSERT(0 == uv_run(uv_default_loop(), UV_RUN_DEFAULT));

  ASSERT(connect_cb_called == 1);

  ASSERT(close_cb_called == 3);

  ASSERT(connection_cb_called == 1);

  ASSERT(bytes_read == bytes_written);

  ASSERT(bytes_written > 0);

  MAKE_VALGRIND_HAPPY();

  return 0;

}