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

#include "../src/ipc.h"

#define MSG "coucou"
#define SERVICE_NAME "pong"

#define PRINTERR(ret,msg) {\
	const char * err = ipc_errors_get (ret);\
	fprintf(stderr, "error while %s: %s\n", msg, err);\
}

void chomp (char *str, ssize_t len) {
	if (str[len -1] == '\n') {
		str[len -1] = '\0';
	}
	if (str[len -2] == '\n') {
		str[len -2] = '\0';
	}
}

struct ipc_connection_info *srv;

void non_interactive (char *env[])
{
    SECURE_DECLARATION (struct ipc_message, m);

    // init service
	TIPC_P_Q (ipc_connection (env, srv, SERVICE_NAME), "application connection", EXIT_FAILURE);
    TIPC_P_Q (ipc_message_format_data (&m, 42, MSG, (ssize_t) strlen(MSG) +1), "message format data", EXIT_FAILURE);

    printf ("msg to send (%ld): %.*s\n", (ssize_t) strlen(MSG) +1, (int) strlen(MSG), MSG);
	TIPC_P_Q (ipc_write (srv, &m), "application write", EXIT_FAILURE);
    ipc_message_empty (&m);
	TIPC_P_Q (ipc_read (srv, &m), "application read", EXIT_FAILURE);

    printf ("msg recv (type: %u): %s\n", m.user_type, m.payload);
    ipc_message_empty (&m);

	TIPC_P_Q (ipc_close (srv), "application close", EXIT_FAILURE);
}

void interactive (char *env[])
{
    // init service
	TIPC_P_Q (ipc_connection (env, srv, SERVICE_NAME), "application connection", EXIT_FAILURE);

	SECURE_DECLARATION (struct ipc_event, event);
	SECURE_DECLARATION (struct ipc_connection_infos, services);

	ipc_add (&services, srv);
	ipc_add_fd (&services, 0); // add STDIN

	ipc_connections_print (&services);

    while (1) {
        printf ("msg to send: ");
        fflush (stdout);

		TIPC_P_Q (ipc_wait_event (&services, NULL, &event), "wait event", EXIT_FAILURE);

		switch (event.type) {
			case IPC_EVENT_TYPE_EXTRA_SOCKET:
				{
					// structure not read, should read the message here
					ssize_t len;
					char buf[4096];
					memset(buf, 0, 4096);

					len = read (event.origin->fd, buf, 4096);

					buf[len -1] = '\0';
					chomp (buf, len);

#if 0
					printf ("\n");
					printf ("message to send: %.*s\n", (int) len, buf);
#endif

					// in case we want to quit the program
					if ( len == 0
						|| strncmp (buf, "quit", 4) == 0
						|| strncmp (buf, "exit", 4) == 0) {

						TIPC_P_Q (ipc_close (srv), "application close", EXIT_FAILURE);

						ipc_connections_free (&services);

						exit (EXIT_SUCCESS);
					}

					// send the message read on STDIN
					struct ipc_message *m = NULL;
					SECURE_BUFFER_HEAP_ALLOCATION_R (m, sizeof (struct ipc_message), , );

					TIPC_P_Q (ipc_message_format_data (m, 42, buf, len), "message format", EXIT_FAILURE);

#if 0
					printf ("\n");
					printf ("right before sending a message\n");
#endif
					TIPC_P_Q (ipc_write (srv, m), "ipc_write", EXIT_FAILURE);
#if 0
					printf ("right after sending a message\n");
#endif

					ipc_message_empty (m);
					free (m);
				}
				break;
			case IPC_EVENT_TYPE_MESSAGE:
				{
					struct ipc_message *m = event.m;
					printf ("\rmsg recv: %.*s\n", m->length, m->payload);
				};
				break;
			case IPC_EVENT_TYPE_DISCONNECTION:
			case IPC_EVENT_TYPE_NOT_SET:
			case IPC_EVENT_TYPE_CONNECTION:
			case IPC_EVENT_TYPE_ERROR:
			default :
				fprintf (stderr, "should not happen, event type %d\n", event.type);
		}
    }
}

int main (int argc, char *argv[], char *env[])
{
	argc = argc; // warnings
	argv = argv; // warnings

	srv = malloc (sizeof (struct ipc_connection_info));
    memset (srv, 0, sizeof (struct ipc_connection_info));
	
    // index and version should be filled
    srv->index = 0;
    srv->version = 0;

    if (argc == 1)
        non_interactive (env);
    else
        interactive (env);

    return EXIT_SUCCESS;
}