#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/types.h>  //pentru diferite tipuri clock, time ,off_set
#include <sys/stat.h>   //pentru fisiere
#include <unistd.h>
#include <time.h>
#include <dirent.h>
#include <string.h>

char buffer[1024];
char txt[3]="txt";

//functia creaza un fisier identic de la pathul aux in pathul text
void copiere_txt(char* aux,char * temp){
	int file;
	int whcpy;
				if((file=open(aux,O_RDWR))<0){
					printf("Eroare la deschidere fisier");
					exit(3);
				}


				if((whcpy=open(temp,O_WRONLY | O_CREAT | O_TRUNC,S_IWUSR|S_IRUSR))<0){
					printf("Eroare la deschidere fisier");
					exit(4);
				}

	int rez;
	char c;
	while((rez=read(file,&c,sizeof(char)))>0)
		if(write(whcpy,&c,rez)<0)
			printf("Eroare la copiere");
	close(file);
	close(whcpy);

}

void copiere_dir(char* temp){

	mkdir(temp,S_IRWXU|S_IRWXG|S_IROTH|S_IXOTH);
}


void func(int nr,char* args1,char* args2){
	char tab[20][20];
	int tab_counter=0;
	DIR* dir=NULL;
	struct dirent* box;

	if(nr<3){
		printf("Nu s-au introdus suficienti paramatri");
		exit(1);

	}


	if((dir=opendir(args1))==NULL){
		printf("Eroare la deschidere fisier");
		exit(2);
	}

	box=readdir(dir);
	while(box!=NULL){
		printf("%s\n",box->d_name);
		strcpy(tab[tab_counter++],box->d_name);
		box=readdir(dir);
	}

	int i;
	printf("\n\n");
	for(i=0;i<tab_counter;i++){
		if(tab[i][0]!='.'){
			char* ttxt=strstr(tab[i],txt);
			if(ttxt){
				//formam path-ul pentru fiecare fisier de tip text
				char* aux=(char*)malloc(sizeof(char)*100);
				char* temp=(char*)malloc(sizeof(char)*100);

				strcpy(aux,args1);
				strcpy(temp,args2);
				int m=strlen(aux);
				int n=strlen(temp);

				aux[m]='/';
				temp[n]='/';
				strcat(aux,tab[i]);
				strcat(temp,tab[i]);
				//printf("%s\n",temp);  //afisare cale

				//deschidem fisierele
				copiere_txt(aux,temp);

				aux=NULL;
				temp=NULL;


			}

			else{
				char aux[3][100];
				strcpy(aux[1],args1);
				strcpy(aux[2],args2);
				int m=strlen(aux[1]);
				int n=strlen(aux[2]);

				aux[1][m]='/';
				aux[2][n]='/';

				strcat(aux[1],tab[i]);
				strcat(aux[2],tab[i]);
				//merge recursiv in fiecare director
				func(3,aux[1],aux[2]);
				copiere_dir(aux[2]);


			}
	}

	}

}


int main(int args,char** argv){
	func(args,argv[1],argv[2]);
	return 0;
}