#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <sys/timex.h>
#include <unistd.h>
#include <netdb.h>
#include <stdlib.h>
#include <arpa/inet.h>
#include <iostream.h>

#define MAX_MSG 5

int main (int argc, char** argv)
{
  if (argc != 5)
    {
      cout << "congestS <socktype> <# of packets> <server ip address> <port>\n";
      cout << "\twhere socktype: \n\t\t1 -> SOCK_STREAM\n\t\t2 -> SOCK_CLUSTER\n";
      cout << "\tThe starting port is ther port to which the first client connects, the nth client connects " <<
	"to <starting_port_num>+(n-1)\n";
      return 1;
    }
  struct ntptimeval start, stop;
  
  int socktype = atoi(argv[1]);
  if ((socktype <= 0) || (socktype > 2))
    {
      cout << "Socktype must be 1 for SOCK_STREAM or 2 for SOCK_CLUSTER\n";
      return 1;
    }
  
  int sockDeclVal = 0;
  switch(socktype)
    {
    case 1:
      sockDeclVal = SOCK_STREAM;
      break;
    case 2:
      sockDeclVal = SOCK_CLUSTER;
      break;
    }
  
  
  int max = atoi(argv[2]);  
  char* machineName = argv[3];
  int startingPort = atoi(argv[4]);
  int usecs = 0;
  int secs = 0;
  int desc;
  int newDesc;
  
  struct hostent* host = gethostbyname(machineName);
  
      
  struct sockaddr_in sockStruct;
  sockStruct.sin_family =  AF_INET;
  sockStruct.sin_port = startingPort;
  sockStruct.sin_addr.s_addr = inet_addr(machineName);
      
  desc = socket(PF_INET, sockDeclVal, 0); //0->ip
  if (desc == -1)
    { 
      cout << "Error setting protocol\n";
      return 1;
    }
      
      
  if (bind(desc, (const sockaddr*)&sockStruct, sizeof(sockStruct)) == -1)
    {
      cout << "Error binding client, " << strerror(errno) << "\n";
      return 1;
    }
      
  if (listen(desc, 0) == -1)
    {
      cout << "Error listening\n";
      return 1;
    }
      
  struct sockaddr_in inSockStruct;
  socklen_t size;
  newDesc = accept(desc, (sockaddr*)&inSockStruct, &size);
  if (newDesc == -1)
    {
      cout << "Error accepting connection\n";
      return 1;
    }
      
  
  char* sendMsg = new char[MAX_MSG];
  sendMsg[0] = 'A';
  int finishedClients = 0;
  int numBytes = 0;
  char numBytesStr[5];
  int sent;
  ntp_gettime(&start);
  for (int k=0; k < max; k++)
    { 
      if (sent = send(newDesc, (const void*) sendMsg, 1,  MSG_WAITALL ) != 1)
	{
	  cout << "Did not send all chars, " << sent << "\n";
	  return 1;
	}
      if (sendMsg[0] != 'Z')
	sendMsg[0] += 1;
      else
	sendMsg[0] = 'A';
      
    }
  ntp_gettime(&stop);
  

  //compute how long it took
  secs = stop.time.tv_sec - start.time.tv_sec;
  if (stop.time.tv_usec < start.time.tv_usec)
    {
      //we didn't finish that last second
      secs--;
      usecs = 1000000 - (start.time.tv_usec - stop.time.tv_usec);
    }
  else
    {
      usecs = stop.time.tv_usec - start.time.tv_usec;
    }
  
  cout << "\nTest time secs: " << secs << " usecs: " << usecs << "\n"; 
  cout << "Please continue the client, once the client is complete press enter\n";
  cout.flush();
  char msg[20];
  cin.getline(msg, 20); 
  //let clients close first
  sleep(3);

  close(newDesc);
  close(desc);

  
  delete sendMsg;
  return 0;
  
};