#ifndef STASH_H
#define STASH_H
#include <iostream>
using std::cout;
using std::cin;

int gIncrement = 4;

class stash{
	char *ch;
	int currentSize; //position of the last character
	int currentStorage; //size of the entire array
	int next;
public:
	stash();
	stash(int startSize);
	stash(char *p);
	~stash();
	
	void show(){
		cout << "currentStorage: " << currentStorage << "\n";
		cout << "current size: " << currentSize << "\n";
		cout << "Next: " << next << "\n";
		for(int i=0; i<currentSize; i++)
			cout << ch[i];
		cout << "\n";
	}
	
	void inflate();
	void add(char p);
	void insertString(char *p);
	char* returnAsString();
	void clearStash();
	
	char returnCharacterAtPosition(int i);
	int returnCurrentSize(){return currentSize;}
	int returnCurrentStorage(){return currentStorage;}
	int returnNext(){return next;}
	
	void operator+(char *p);
	void operator=(char *p);
	void operator=(stash s);

};

//**constructors and destructors
stash::stash(){
	ch = new char [0];
	currentSize = 0;
	currentStorage = 0;
	next = 0;
}

stash::stash(int startSize){
	ch = new char [startSize];
	currentSize = 0;
	currentStorage = startSize;
	next = currentStorage - currentSize;
}

stash::~stash(){
	delete [] ch;
	cout << "Freeing storage\n";
}

stash::stash(char *p){
	clearStash();
	insertString(p);
}
//**

//--Increase the stash's size to hold more chars.
void stash::inflate(){
	int i;
	char *temp = new char [currentSize + gIncrement];
	for(i=0; i<currentSize; i++)
		temp[i] = ch[i];
	delete [] ch;
	ch = temp;
	currentStorage = currentStorage + gIncrement;
}

//--add a character to the stash and resize it according
//--to space needed
void stash::add(char p){
	if(next == 0)
		inflate();
	ch[currentSize] = p;
	++currentSize;
	next = currentStorage - currentSize;
}

//--reset the stash
void stash::clearStash(){
	currentSize = 0;
	currentStorage = 0;
	ch = new char [0];
	next = currentStorage - currentSize;
}

//--insert an entire string into the stash
void stash::insertString(char *p){
	int i;
	for(i=0; p[i]; i++){
		add(p[i]);
	}
}

//--make the chars a string
char* stash::returnAsString(){
	add('\0');
	next--; //to overwrite the zero byte next time we add something
	return ch;
}

//--add more chars into the string;
void stash::operator+(char *p){
	insertString(p);
}

//--Return a character at a specified position
//--Return NULL if a character doesn't exist at the
//--requested position
char stash::returnCharacterAtPosition(int i){
	if(i>currentSize)
		return NULL;
	return ch[i];
}

//--clear the stash and hold a new string
void stash::operator=(char *p){
	
	clearStash();
	insertString(p);
}

//--THIS HAS PROBLEMS WITH MEMORY ALLOCATION!!!
void stash::operator=(stash s){
	int i;
	delete [] ch;
	char *temp = new char [s.returnCurrentSize()];
	for(i=0; i<s.returnCurrentSize(); i++){
		temp[i] = s.returnCharacterAtPosition(i);
	}
	next = s.returnNext();
	currentStorage = s.returnCurrentStorage();
	currentSize = s.returnCurrentSize();
	
	ch = temp;
}

#endif