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

#define MAX_MSG 1722
#define OUTPUT_FILE "charC.txt"

int main (int argc, char** argv)
{
  if (argc != 5)
    {
      cout << "charC <socktype> <# chars> <server ip address> <port>\n";
      cout << "\twhere socktype: \n\t\t1 -> SOCK_STREAM\n\t\t2 -> SOCK_CLUSTER\n"; 
      return 1;
    }
  
  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;
    }
  
  FILE* OutputFile = fopen(OUTPUT_FILE, "w+");
  if (!OutputFile)
    {
      cout << "Failed to write to file " << OUTPUT_FILE;
      return 1;
    }
  int bytesLeft = atoi(argv[2]);
  char* machineName = argv[3];
  int port = atoi(argv[4]);
  
  struct hostent* host = gethostbyname(machineName);
  
  struct sockaddr_in sockStruct;
  sockStruct.sin_family =  AF_INET;
  sockStruct.sin_port = port;
  sockStruct.sin_addr.s_addr = inet_addr(machineName);
  
  int desc = socket(PF_INET, sockDeclVal, 0); //0->ip
  if (desc == -1)
    {
      cout << "Error setting protocol\n";
      return 1;
    }
  
  
  if ( connect(desc, (const sockaddr*)&sockStruct, sizeof(sockStruct)) == -1)
    {
      cout << "Failed to connect " << strerror(errno) << "\n";
      return 1;
    }
  
  
  char* sentMsg = new char[MAX_MSG+1];
  while(bytesLeft)
    {
      int msgSize = rand();
      msgSize = msgSize % MAX_MSG;
      
      if (msgSize > bytesLeft)
      {
	      msgSize = bytesLeft;
      }
      int got = recv(desc, (void*)sentMsg, msgSize,  MSG_WAITALL );
      if (msgSize != got)
	{
	  printf ("Only received %d chars\n", got);
	  return 0;
	}
      sentMsg[msgSize] = 0;
      fprintf(OutputFile, "%s", sentMsg);
      bytesLeft -= msgSize;
     
    }
 
  close(desc);
  delete sentMsg;
  fclose(OutputFile);
  
  return 0;
};