#include <wait.h>
#include "libnazgul.h"

void usage(char * myname){
  printf("Usage: %s [--all | msgSpaceId1 msgSpaceId2 ... ]\n",myname);
}

int about(char * spaceId){
  msgPoolDataTabSemId ressourceSemId;
  sem_t * ressourceSemFd;
  int i;
  msgPoolData * poolDataTab;
  msgSpace * space;
  int ressourceSemVal;
  if (strlen(spaceId)> MSGSPACE_ID_LEN){
	//verif de la longueur
	fprintf(stderr,"Too long ident : %s\n",spaceId);
	goto ERROR;
  } else {
	int err;
	msgSpaceListLock();
	err=msgSpaceListFindId(spaceId);
	msgSpaceListUnlock();
	if (err < 1){
	  if (err==0){
		// le msgSpace existe
		space=msgSpaceOpen(spaceId);
		// on lit les informations sur le msgSpace
		// les pool
		for (i=0;i<space->poolNb;i++){
		  msgPoolSemIdIntern(ressourceSemId,space->externId,i);
		  ressourceSemFd = sem_open(ressourceSemId,O_CREAT,SEM_DEFAULT_MODE,0);
		  if (ressourceSemFd == SEM_FAILED){ 
			NZG_ERROR("sem_open",ressourceSemId);
			goto ERROR;
		  }
		  if (sem_getvalue(ressourceSemFd, &ressourceSemVal) < 0){ 
			NZG_ERROR("sem_getvalue",ressourceSemId);
			goto ERROR;
		  }
		  msgPoolDataTabLock(space);
		  poolDataTab= msgPoolDataTabOpen(space);
		  // donner le nombre de buffer disponibles
		  printf("- %d/%d free buffers in pool #%d\n",
			  ressourceSemVal,
			  poolDataTab[i].bufferNb,
			  i);
		  msgPoolDataTabClose(space,poolDataTab);
		  msgPoolDataTabUnlock(space);
		  if(sem_close(ressourceSemFd) <0){
			NZG_ERROR("sem_getvalue",ressourceSemId);
			goto ERROR;
		  }
		  // pour chaque buffer, dire s'il est libre ou pas
		  // et le processus/addresse associé
		}
		msgSpaceClose(space);
	  } else {
		// zut, il y a soit une erreur
		NZG_ERROR("spaceListFindId : error ",spaceId);
	  }
	} else {
	  // on quitte : l'element n'existe
	  fprintf(stderr,"Ident %s does not exist.\n",spaceId);
	}
  }
  return 0;
ERROR:
  return -1;
}

int main(int argc,char **argv){
  printf("Args %d\n",argc);
  if (argc<2){
	usage(argv[0]);
  }else {
	if (argc==2){
	  if (strcmp("--all",argv[1])==0){
		// listing
		printf("[ Listing of msgSpaces ]\n");
	  } else {
		// only one msgSpaceId
		printf("[ About %s ]\n",argv[1]);
		about(argv[1]);
	  }
	} else {
	  int i;
	  for (i=1;i<argc;i++){
		printf("[ About %s ]\n",argv[i]);
		about(argv[i]);
	  }
	}
  }
  return 0; 
}