#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <time.h>

void findWinner(int player,int pc)
{
	const char *items[3]={"Paper","Scissors","Rock"};
	printf("Client: %s\n",items[player-1]);
	printf ("Computer: %s\n",items[pc-1]);

	switch (player)
	{
		case 1:
			switch (pc)
			{
				case 1:
					printf("it is a DRAW\n");
					break;
				case 2:
					printf("Computer Wins\n");
					break;
				case 3:
					printf("Computer Loses\n");
					break;
				default:
					printf("ERROR\n");
					exit(0);
			};
			break;
		case 2:
			switch (pc)
			{
				case 1:
					printf("Computer Loses\n");
					break;
				case 2:
					printf("it is a DRAW\n");
					break;
				case 3:
					printf("Computer Wins\n");
					break;
				default:
					printf("ERROR\n");
					exit(0);
			};
			break;
		case 3:
			switch (pc)
			{
				case 1:
					printf("Computer Wins\n");
					break;
				case 2:
					printf("Computer Loses\n");
					break;
				case 3:
					printf("it is a draw\n");
					break;
				default:
					printf("ERROR\n");
					exit(0);
			};
			break;
		default:
			printf("ERROR\n");
			exit(0);
	}
}

///   SERVER   
 
int main(int argc, char *argv[])
{
    //Declaring process variables.
    int server_sockfd, client_sockfd;
    int server_len ; 
    int rc,pcChoice ; 
    unsigned client_len;
    struct sockaddr_in server_address;
    struct sockaddr_in client_address;
 
    //Remove any old socket and create an unnamed socket for the server.
    server_sockfd = socket(AF_INET, SOCK_STREAM, 0);
    server_address.sin_family = AF_INET;
    server_address.sin_addr.s_addr = htons(INADDR_ANY);
    server_address.sin_port = htons(7735) ; 
    server_len = sizeof(server_address);
 
    rc = bind(server_sockfd, (struct sockaddr *) &server_address, server_len);
     
    //Create a connection queue and wait for clients
    rc = listen(server_sockfd, 5);
    printf("waiting for client...\n") ; 
 
    client_len = sizeof(client_address);
    client_sockfd = accept(server_sockfd, (struct sockaddr *) &client_address, &client_len);
    printf("Client: ready\n") ;
    printf("Go\n"); 
 
    while(1)
    {
        int gameType;
        printf("Paper, Scissors, Rock game start.\n");

        rc = read(client_sockfd, &gameType, 1);       
	srand(time(NULL));
	pcChoice = (rand() % 3)+1;
	findWinner(gameType,pcChoice);
        gameType  = pcChoice;
        write(client_sockfd, &gameType, 1);

    }
 
    printf("server exiting\n");
 
    close(client_sockfd);
    return 0;
}

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
 
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
 
void showMenu()
{
	printf("\tyou can choose\n");
	printf("\t1 : Paper\n");
	printf("\t2 : Scissors\n");
	printf("\t3 : Rock\n");
	printf("\t4 : Exit\n");
}

void showHelp()
{
	printf("Paper beats rock (by covering it).\n");
	printf("Rock beats scissors (by blunting it).\n");
	printf("Scissors beats paper (by cutting it).\n");
	printf("Matching choices draw.\n");
	showMenu();
}

void findWinner(int player,int pc)
{
	 const char *items[3]={"Paper","Scissors","Rock"};
	printf ("The Other Player Choose %s , ",items[pc-1]);
	switch (player)
	{
		case 1:
			switch (pc)
			{
				case 1:
					printf("it is a DRAW\n");
					break;
				case 2:
					printf("you LOST\n");
					break;
				case 3:
					printf("you WON\n");
					break;
				default:
					printf("ERROR\n");
					exit(0);
			};
			break;
		case 2:
			switch (pc)
			{
				case 1:
					printf("you WON\n");
					break;
				case 2:
					printf("it is a DRAW\n");
					break;
				case 3:
					printf("you LOST\n");
					break;
				default:
					printf("ERROR\n");
					exit(0);
			};
			break;
		case 3:
			switch (pc)
			{
				case 1:
					printf("you LOST\n");
					break;
				case 2:
					printf("you WON\n");
					break;
				case 3:
					printf("it is a draw\n");
					break;
				default:
					printf("ERROR\n");
					exit(0);
			};
			break;
		default:
			printf("ERROR\n");
			exit(0);
	}
}

///   CLIENT   
 

int main(int argc, char *argv[])
{
    printf("Welcome to the Paper, Scissors and Rock game.\n");
    showMenu();
 
    int sockfd;
    int len, rc ;
    struct sockaddr_in address;
    int result;
    int itemType , tmp;
    
    char num[1];
 
   //Create socket for client.
    sockfd = socket(PF_INET, SOCK_STREAM, 0);
    if (sockfd == -1) { 
        perror("Socket create failed.\n") ; 
        return -1 ; 
    } 
     
    //Name the socket as agreed with server.
    address.sin_family = AF_INET;
    address.sin_addr.s_addr = inet_addr("127.0.0.1");
    address.sin_port = htons(7735);
    len = sizeof(address);
 
    result = connect(sockfd, (struct sockaddr *)&address, len);
    if(result == -1)
    {
        perror("Error has occurred");
        exit(-1);
    }
 
	do
	{
		printf("\tEnter the option: ");
		scanf("%1s",num);		
		fflush(stdin);			
		if (isdigit(num[0]))
		{
			itemType= num[0] - '0';	
		}
		else
		{
			printf("Please Enter a number based on the options: \n");
			showHelp();
			continue;
		}
		if ((itemType <= 3) && (itemType > 0))
		{
			tmp=itemType;
			rc = write(sockfd, &itemType, 1);
			if (rc == -1) break ; 
			read(sockfd, &itemType, 1);
			findWinner(tmp,itemType);
		}
		else if(itemType == 4)
		{
			printf("The game is terminated.\n");
			exit(0);
		}
		 else
		{
			showHelp();
			continue;
		}

	}
    	while ( 1 ); 
    close(sockfd);
 
    exit(0);
}