#include <iostream>
#include <fstream>
#include "list.h"

Flowlist::Flowlist(): headM(0)
{
}

/*
void Flowlist::Flowlist(const Flowlist& rhs)
{
	copy(source);

}
*/

/*
Flowlist::~Flowlist()
{
	destroy();
}
*/
void Flowlist::insert(Node *input)
{
	search = headM;

	if(headM == 0 || input->flow<= headM->flow)
	{
		input->next = headM;
		headM = input;
	}
	else
	{
		Node *before = headM;
		Node *after = headM->next;
		while (after != 0 && input->flow > after->flow)
		{
			before = after;
			after = after ->next;
		}
		input->next = after;
		before-> next = input;
	}
}

Node* Flowlist::read_item(int n)
{

 search = headM;

 for(int i=0; i < n; i++)
 {
 	search = search->next;
 }
 return search;
}

 /*
int Flowlist::get_item()
{
	int y , z;
	double w;
	node  *x;
	x = read_item(const Flow&, int n);
	w = x->ListItem->flow;
	z= x->ListItem->year;
	return
}
*/

int Flowlist::get_year(int n)
{
 search = headM;

 for(int i=0; i < n; i++)
 {
 	search = search->next;
 }
 return search->year;
}

double Flowlist::get_flow(int n)
{
	search = headM;

	for(int i=0; i < n; i++)
	{
		search = search->next;
	}
	return search->flow;
}
//set functions
/*
 void Flowlist::Flowlist::operator=(const Flowlist& rhs)
{

	if (this!= &rhs)
	{
		destroy();
		copy(rhs);
	}
	return *this;
}
*/


/*
bool Flowlist::check(int y)
{
	search = headM;
	while(search !=0)
	{
		search = search->next;

	}
}
*/
bool Flowlist::year_exists(int y)
 {
	search = find_year(y);
	if(search == NULL)
		return false;
	return true;
 }

void Flowlist::remove(int y)
{

	if ((headM == 0 )||(y < headM->year))
		return;

	Node *doomed_node = 0;

	if (y == headM->year)
	{
		doomed_node = headM;
		headM = headM->next;
	}
	else
	{
		Node *before = headM;
		Node *maybe_doomed = headM->next;
		while(maybe_doomed != 0 && y > maybe_doomed->year) {
            before = maybe_doomed;
            maybe_doomed = maybe_doomed->next;
        }
		if(maybe_doomed->year == y)
		{
			before->next = maybe_doomed->next;
			doomed_node = maybe_doomed;
		}
	}
	delete doomed_node;
	return;
}

Node* Flowlist::find_year(int y)
{
	int i = 0;
	search = headM;
	while(search != 0)
	{
		int x = get_year(i);
		if (x == y)
		{
			break;
		}
		search = search->next;
		i++;
	}
 return search;
}