#include "locktests.h"

#include <netdb.h>
#include <string.h>
#define PORT 12346
#define MAX_CONNECTION 16

int maxClients;
int *fdClient;
char *serveur;
int fdServeur;
extern char message[M_SIZE];

int serverReceiveClient(int c)
{
	char tmp[M_SIZE];
	int r, s;
	/* Il faut etre sur que l'on lit _exactement_ la trame envoyee (M_SIZE) */
	/* Ensure we read _exactly_ M_SIZE characters in the message */
	memset(message, 0, M_SIZE);
	memset(tmp, 0, M_SIZE);
	r = 0;
	s = 0;

	while (s < M_SIZE) {
		r = read(fdClient[c], tmp, M_SIZE - s);
		/* On complete le message au fur et a mesure */
		/* Loop until we have a complete  message */
		strncpy(message + s, tmp, r);
		s += r;
	}
	return s;
}

int serverSendClient(int n)
{
	return write(fdClient[n], message, M_SIZE);
}

int clientReceiveNet()
{
	readFromServer(message);
	return 0;
}

int setupConnectionServeur()
{
	struct sockaddr_in local;
	int c;
	socklen_t size;
	int sock;
	struct sockaddr_in remote;

	if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
		perror("socket");
		exit(1);
	}
	memset(&local, 0x00, sizeof(local));
	local.sin_family = AF_INET;
	local.sin_port = htons(PORT);
	local.sin_addr.s_addr = INADDR_ANY;
	memset(&(local.sin_zero), 0x00, 8);

	if (bind(sock, (struct sockaddr *)&local, sizeof(struct sockaddr)) ==
	    -1) {
		perror("bind");
		exit(1);
	}

	if (listen(sock, MAX_CONNECTION) == -1) {
		perror("listen");
		return 1;
	}
	size = sizeof(struct sockaddr_in);
	for (c = 0; c < maxClients; c++) {

		/* On accepte les connections clientes */
		/* Accept incoming connections */
		if ((fdClient[c] =
		     accept(sock, (struct sockaddr *)&remote, &size)) == -1) {
			perror("accept");
			return 1;
		}

	}
	return 0;
}

int writeToClient(int c, char *message)
{
	return write(fdClient[c], message, 512);
}

int serverCloseConnection()
{
	int c;
	for (c = 0; c < maxClients; c++)
		close(fdClient[c]);
	return 0;

}

int writeToAllClients(char *foo)
{
	int c;
	for (c = 0; c < maxClients; c++)
		writeToClient(c, foo);
	return 0;
}

int setupClients(int type, char *fname, int nThread)
{
	/*
	 * Envoi des parametres a tous les clients
	 *
	 * on doit envoyer 3 parametres :
	 * - l'emplacement du fichier test
	 * - Le nombre d'esclaves
	 * - Le type de sous processus : thread ou process
	 */

	/*
	 * Send parameters to all slaves :
	 *
	 * We must send :
	 * - the position of the test file
	 * - the number of slaves for each client
	 * - The kind of slaves : process or thread
	 */

	char message[512];
	sprintf(message, "%d:%s:%d::", type, fname, nThread);
	writeToAllClients(message);
	return 0;
}

int configureServeur(int max)
{
	maxClients = max;
	fdClient = (int *)malloc(sizeof(int) * max);

	setupConnectionServeur();

	return 0;
}

int setupConnectionClient()
{

	struct hostent *server;
	struct sockaddr_in serv_addr;

	if (!(server = gethostbyname(serveur))) {
		printf("erreur DNS\n");
		return 1;
	}

	fdServeur = socket(AF_INET, SOCK_STREAM, 0);
	if (fdServeur < 0) {
		perror("socket");
		return 1;
	}

	serv_addr.sin_addr = *(struct in_addr *)server->h_addr;
	serv_addr.sin_port = htons(PORT);
	serv_addr.sin_family = AF_INET;
	if (connect(fdServeur, (struct sockaddr *)&serv_addr, sizeof(serv_addr))
	    < 0) {
		perror("connect");
		return 1;
	}
	return 0;
}

int readFromServer(char *message)
{
	char tmp[M_SIZE];
	int r, s;
	/* Il faut etre sur que l'on lit _exactement_ la trame envoyee de taille M_SIZE */
	/* Ensure we read exactly M_SIZE characters */
	memset(message, 0, M_SIZE);
	memset(tmp, 0, M_SIZE);
	r = 0;
	s = 0;
	while (s < M_SIZE) {
		r = read(fdServeur, tmp, M_SIZE - s);
		/* On complete le message au fur et a mesure */
		/* Loop until we have a complete message */
		strncpy(message + s, tmp, r);
		s += r;
	}
	return s;
}

int getConfiguration(int *type, char *fname, int *nThread)
{
	char conf[M_SIZE];
	char *p;
	int i;
	readFromServer(conf);
	p = strtok(conf, ":");
	printf("%s\n", p);
	*type = atoi(p);
	p = strtok(NULL, ":");
	i = strlen(p);
	strncpy(fname, p, i);
	p = strtok(NULL, ":");
	*nThread = atoi(p);

	return 0;
}

int configureClient(char *s)
{
	serveur = s;
	setupConnectionClient();
	return 0;
}
