/****************************
* Programmer: Joe Gakenheimer
* Date: February 25, 2004
* Course: Comp 470 - Computer Networks
* Assignment:  Lab 1, Balderdash Client
* File Name: gakenh01/cs470/Lab1/lab1.cpp
* Description: Balderdash Client
* The client makes a connection to the server.  
* It then reads and player1 and line_of_text from the user and sends them to the server.  
* It then reads the verse back from the server and displays it.
* Input: Username and Sentence.
* Output: Username and Sentence.
* Compile: g++ lab1.cpp -lsocket -lnsl -o lab1
* Execute: lab1
*
*FYI: Palikir is capital of Micronesia
*     Truk, Chuuk a city/state in Micronesia
*     where many U.S. and Japanese WWII planes
*     are lying in the shallow waters
*****************************/

#include <iostream>
#include <string>

#include <stdio.h>
#include <unistd.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>

#define PORT 51388                      // Port on which server is listening
#define HOST "einstein.franklin.edu"    // Host where server is running
#define BUFFER_LC 100                   // max buffer length

int main( int argc, char *argv[] )
{
    char data_buff[BUFFER_LC];
    string player1, line_of_text, line;
    int sd;                             // socket descriptor
    int i;
    int linenum;
    struct sockaddr_in server_addr;     // server address descriptor
    struct hostent *host_ptr;           // server information structure
    int rc;                             // return code
	const int input_tries = 5;          //5 tries to enter your name

    cout << "dasher1 51388" << endl;
    cout << "dasher1: Starting" << endl;
	cout << "dasher1: port = 51388" << endl;

    /*get info from target host*/
    host_ptr = gethostbyname(HOST);
    if ( host_ptr == 0 )
    {
        perror( "dasher1: Error in gethostbyname!" );
        exit( EXIT_FAILURE );
    }

    /*address structure for the server*/
    server_addr.sin_family = AF_INET;
    server_addr.sin_port = htons(PORT);// port number
    memcpy(&server_addr.sin_addr, host_ptr->h_addr, host_ptr->h_length ); // IP address
    for( i=0; i<8; i++ )
        server_addr.sin_zero[i] = 0;
    /*create socket*/
    sd = socket(PF_INET, SOCK_STREAM, 0);
    if ( sd < 0 )
    {
        perror( "dasher1: Error creating Socket!\n" );
        exit( EXIT_FAILURE );
    }

    /*connect to server*/
    rc = connect( sd, (struct sockaddr *)&server_addr, sizeof(server_addr) );
    if ( rc < 0 )
    {
        perror( "dasher1: Error during Connection!\n" );
        exit( EXIT_FAILURE );
    }
    /*get player 1*/
	/*validate players name against empty*/
	cout << "Please enter your name: " << endl;
	for (int count = 1; ; count++)
	{
        getline(cin, player1);
	    if (player1 != "")
	    {
			break;//exit input loop
	    }
		else if (count < input_tries)
		{
			cout << "Please try re-entering your name again..."; 
		}
		else
		{
			cout << "Sorry, I gave you five tries - program terminated..." << endl;
			exit(1);
		}
	}
    if((player1 == "exit"))
	{
	    cout << "Closing Connection." << endl;
        exit(1);
	}	
	cout << "Welcome to the game, " << player1 << endl;
    /*get line of text from user*/
    line = player1 + "\0\n";//\0 is null so compiler knows end of string
	//was:  line = player1 + "/" + line_of_text + "/" + "\0\n";//\0 is null so compiler knows end of string
	line += "\n";//endline onn server
	rc = send(sd, line.c_str(), line.length()+0, 0);	
    cout << "Please enter a line of text: \n";
    getline( cin, line_of_text );
    if(line_of_text == "exit")
	{
	    cout << "Closing Connection." << endl;
        exit(1);
	}
	/*begin loop*/
    for (; ;)
    {    
        /*send message to server*/
        line = line_of_text + "\0\n";//\0 is null so compiler knows end of string
        //was:  line = player1 + "/" + line_of_text + "/" + "\0\n";//\0 is null so compiler knows end of string
		line += "\n";//endline onn server
		rc = send(sd, line.c_str(), line.length()+0, 0);
        if ( rc < 0 )
        {
            perror( "dasher1: Error during Sending Process!\n" );
            exit( EXIT_FAILURE );
        }
            rc = recv( sd, data_buff, BUFFER_LC, 0 );
            if( rc < 0 )
            {
                perror( "dasher1: Error during Receiving!\n" );
                exit( EXIT_FAILURE );
            }
            cout << "rc = " << rc << endl;
            /*check for disconnect*/
            if( rc == 0 )
			{
                break;
			}
            /*copy answer out of buffer*/
            line = data_buff;
            cout << line;
	    cout << "You entered \"" + line_of_text + "\" enter another line: \n";
		//rc = send(sd, line.c_str(), line.length()+0, 0);
		/*output of line 2 and all subsequnt lines
		  potential bug: must hit return before entering new text*/
		for (; ;)
		{
            /*did it this way to save message to server
		      server knows if connection goes down*/
				//player1="";//marker, not really needed
				//getline( cin, player1 );
		    getline(cin, line_of_text);
		    if(line_of_text == "exit" )
		    {
				cout << "Closing Connection." << endl;
                exit(2);
		    }
            cout << "You entered \"" + line_of_text  + "\" enter another line: \n";
            line = line_of_text  + "\0\n";
			//was:  line = player1 + "/" + line_of_text + "/" + "\0\n";//\0 is null so compiler knows end of string
			line += "\n";//endline onn server
            rc = send( sd, line.c_str(), line.length()+0, 0 );
            /*read line from server*/
            /*clear the buffer*/
            for( i = 0; i < BUFFER_LC; i++ )
                data_buff[i] = 0;
            /*read a line from the server*/
            rc = recv( sd, data_buff, BUFFER_LC, 0 );
            if( rc < 0 )
            {
                perror( "dasher1: Error during Receiving!\n" );
                exit( EXIT_FAILURE );
            }
            //cout << "rc = " << rc << endl;
            /*check for disconnect*/
            if( rc == 0 )
			{
                break;
			}
            /*copy answer out of buffer*/
            line = data_buff;
            cout << line;
		}
        /*read line from server*/
    }
    cout << "dasher1: Closing Connection!" << endl;
    close(sd);
    exit( EXIT_SUCCESS );
}