#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <string.h>
#include "header.h"

main()
{
    char input[100];
	int msid, v;
	struct text_message mess;
	
    // Creating message queue
	msid = msgget( KEY, IPC_CREAT | 0666 );
	if ( msid == -1)
	{
		printf("Queue not joined\n");
		exit(1);
	}


    while (1)
    {        
        printf("Enter a message: ");
        fgets(input, sizeof(input), stdin);
		input[strcspn(input, "\n")] = 0;

        /* Preparing a message */
	    mess.mtype =  KEY;
	    strcpy( mess.mtext, input);
	
	    /* Write a message into queue */
        v = msgsnd (msid, &mess, strlen( input ) + 1, 0);
        if ( v < 0 )
        {
            printf("\nMessage failed to send\n");
            exit(1);
        }
        printf("Message sent\n");
        if (strcmp(input,"Exit")==0)
        {
            msgctl( msid, IPC_RMID, 0);
            exit(0);
        }
		printf("Process will wait\n until Exit\n or new message is received.\n");


        
        /* Read a message of the given type */
        v = msgrcv( msid, &mess, 100, mess.mtype, 0); // Blocking

        if ( v < 0 )
        {
            printf("Error receiving message\n");
            exit(1);
        }
        else
        {
            if (strcmp(mess.mtext,"Exit")==0)
            {
                printf("Exit received\n");
                msgctl( msid, IPC_RMID, 0);
                exit(0);
            }
            else
            {
				printf("Received: %s\n", mess.mtext);
			}
        }
    }
}