#include<stdlib.h> 
#include<stdio.h> 
#include<string.h> 
#include<unistd.h> 
#include<termios.h>
#include<sys/types.h> 
#include<sys/wait.h> 



#define MAXLENGTH 1000 // max dlugosc lini
#define MAXCOMMANDS 100 // max liczba parametrow
#define MAXHISTORY 50 // max l. el. w historii
#define MAXUSERNAMELENGTH 50


static struct termios oldt, newt;

int countHistory;
char * username;
char * cwd;

void clear(){
printf("\033c");//\033 == \x1B == 27 == ESC
} 
    
void printHelp()
{
	printf("\n");
	printf("MyShell help(). Usage:\n");
	printf("ls {path}\t Prints content of a directory\n");
	printf("\t Default directory is \".\"\n");
	printf("cd {path}\n");
	printf("cp [src] [dst]\t Copies file from source to destination\n");
	printf("exec [programname]\tStarts a program\n");
	printf("mkdir [name]\tCreates new directory\n");
	printf("\n");
	printf("\n");
	printf("\n");
	printf("\n");
	printf("\n");
	printf("\n");
	
}
	
void init()
{
	//wylaczenie buforu terminala
	tcgetattr( STDIN_FILENO, &oldt);
	newt = oldt;
	newt.c_lflag &= ~(ICANON);          
	tcsetattr( STDIN_FILENO, TCSANOW, &newt);  

	
	clear();
	sleep(1);
	username = getenv("USER");
	printf("Witaj, %s!\n", username);
		sleep(1); 
		clear();
}
 // 
int prompt(){
	if ( getcwd( cwd, MAXLENGTH * sizeof(char) ) == NULL )
	{
		printf("GETCWD ERROR !");
		return 0;
	}
	else 
	{
	printf("[%s] %s> $",cwd, username); 
		return 1;
	}
}

int readInput(char *input)
{
	char *buf = malloc( MAXLENGTH + 1 );
	int c;
	int count = 0;
	
	while(1)
	{
		c = getchar();
		if ( (c == "\n") || (c==EOF) ) 
		{
			buf[count] = "\0";
			strcpy(input,buf);
			free (buf);
			return count;
		}
	}
}

int findPipes(char *input, char *toParse, char *cmdRest)
{

	char * b = strtok(input, "|");
	
	char * c = strtok(NULL, "");

	strcpy(toParse,input);
	strcpy(toParse,b);

	if (strcmp(toParse,"")) return -1;
	else if (strcmp(cmdRest,"")) return 0; 
	else return 1;


}

int parseSpace(char *input, char **parsed)
{
	int i;
	char * token;
	for (i = 0; i < MAXCOMMANDS; i++)
	{
		while ((token = strtok(input," "))!=NULL){
		strcpy(parsed[i],token);	
	}
}

return 0;
}

int parseInput(char *input, char **parsed, char *cmdRest)
{

	int isPiped = 0;
	char *toParse = calloc((MAXLENGTH+1)*sizeof(char),sizeof(char));

	isPiped = findPipes(input, toParse, cmdRest);

	printf("Input: %s \n toParse: %s \n cmdRest: %s \n",input,toParse,cmdRest);

	if(isPiped == 1)
	{
		printf("FOUND PIPE!\n");

	}
	parseSpace(toParse, parsed);
	
		

	return 0;
}



int main() 
{
	int i,cArgs,c;
	char *inputLine = malloc(MAXLENGTH + 1);
	char *cmdRest = malloc(MAXLENGTH + 1);
	username = malloc(MAXLENGTH + 1);
	cwd = malloc(MAXLENGTH + 1);
	char **parsedCmds = malloc(MAXCOMMANDS*sizeof(char*));
	for (i=0;i<MAXLENGTH;i++) parsedCmds[i] = malloc(MAXLENGTH + 1) ;
	

	

	
	
	

	init();
	
	
	while(1)
	{
		if ( !prompt() ) return 1;
		else 
		{
			c = readInput(inputLine);
			if ( c )
			{
				printf("\n (%d)%s \n",c,inputLine);
				cArgs = parseInput(inputLine, parsedCmds, cmdRest);
				for 
				(
					i = 0,printf("\nDEBUG\n"); 
					i < cArgs; 
					printf("Arg[%d]=%s\n",i, parsedCmds[i]),i++
				);

			}
		}


	}

	tcsetattr( STDIN_FILENO, TCSANOW, &oldt);
	return 0;
}