//
//  File name: netc.C
//
//  This file is written by Ee-Chien Chang, and with minor change
//	by Ting-jen Yen.
//  It is the main program of the client.
//
#include <stdio.h>
#include <iostream.h>


#include </usr/include/stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#include <unistd.h>           // read(), write(), close() 
#include <semaphore.h>
#include <pthread.h>          // thread
 

#include "tcp.h"
#include "tcpstream.h"

//-----------  S H A R E D _ M E M O R Y -------------------

#include "sparse_mask.h"                  // must be included for GLOBAL_VAR.h
#include "sparse_2.h"           // must be included for GLOBAL_VAR.h
#include "GLOBAL_VARIABLE.h"

void  client_network ( tcp_Stream * );    // file client.c

void *display_thread ( void * );          // display.c

main(int argc,char ** argv)
{
   FILE *fp;    // optional 
   char hostname[80];

   int sd;
   int p_argc, port_no = 0;
   p_argc = 0;

//  Look for port option
   if (argc > p_argc+2 && !strcmp(argv[p_argc+1], "-p"))
   {
     port_no = atoi(argv[p_argc+2]);
     p_argc += 2;
   }

//  Look for server name. If there is none, using default value
   if (argc > p_argc+1)
   {
     p_argc++;
     strcpy(hostname, argv[p_argc]);
   }
   else
     strcpy(hostname, "slinky.cs.nyu.edu");

// look for port number again
   if (argc > p_argc+2 && !strcmp(argv[p_argc+1], "-p"))
   {
     port_no = atoi(argv[p_argc+2]);
     p_argc += 2;
   }
// default port number 1222
   if (port_no == 0) port_no = 1222;
   printf("Connecting %s %d\n", hostname, port_no);
   sd = establish_connection ( hostname, port_no, &fp );

   tcp_Stream netstream ( sd );
   ptr_stream = & netstream;


   //------------ initialise  semaphore ------------------//
   sem_init ( &DATA_READY    , 0, 1 );
   sem_init ( &NEW_DATA_READY, 0, 1);
   sem_init ( &QUEUE_EMPTY, 0, 0);
   //  And initialize mutex exclusive locks
   pthread_mutex_init( &USE_QUEUE, NULL);
   pthread_mutex_init( &END_THREAD, NULL);
   pthread_mutex_lock( &END_THREAD);

   sem_wait ( &DATA_READY );     // hold it. will be release by network thread
   Q.startup();			 // Send first request

   //------------ start the 
   //------------        D I S P L A Y   t h r e a d.
   pthread_t          display_id;
   pthread_create ( &display_id, NULL, display_thread, NULL );
 
   //------------ the main thread will continue to be the 
   //------------        N E T   W O R K  t h r e a d.

   client_network ( &netstream );

   //------------  q u i t    

   pthread_mutex_unlock( & END_THREAD);
   pthread_join (  display_id, NULL );
}