// UMBC - CMSC 341 - Spring 2026 - Proj1
#ifndef FUEL_H
#define FUEL_H
#include <iostream>
using namespace std;
// default values
const int MINCAP = 2000; // Minimum Capacity in Kg
const int DEFCAP = 5000; // Default capacity in Kg
class Grader;//this class is for grading purposes, no need to do anything
class Tester;//this is your tester class, you add your test functions in this class
class Pump;  //forward declaration
class FuelSys;//forward declaration
class Tank{
    public:
    friend class Tester;
    friend class Grader;
    friend class FuelSys;
    Tank();
    Tank(int ID, int tankCap, int tankFuel = 0, 
        Pump* pumpList = nullptr, Tank* nextTank = nullptr)
    {
        m_tankID = ID; m_tankCapacity = tankCap; m_tankFuel = tankFuel;
        m_pumps = pumpList; m_next = nextTank;
    }
    private:
    int m_tankID;       // unique identifier
    int m_tankCapacity;
    int m_tankFuel;     // current amount of fuel in the tank
    Pump * m_pumps;
    Tank * m_next;
};
class Pump{
    public:
    friend class Tester;
    friend class Grader;
    friend class FuelSys;
    Pump();
    Pump(int ID, int target, Pump* nextPump = nullptr){
        m_pumpID = ID; m_target = target;
        m_next = nextPump;
    }
    private:
    int m_pumpID;   // unique identifier
    int m_target;   // ID of the target tank for transfer
    Pump * m_next;
};
class FuelSys{
    public:
    friend class Tester;
    friend class Grader;
    FuelSys();
    ~FuelSys();
    const FuelSys & operator=(const FuelSys & rhs);
    bool addTank(int tankID, int capacity, int tankFuel);
    bool removeTank(int tankID);
    bool findTank(int tankID); // if tank is found, it becomes the next of current
    bool addPump(int tankID, int pumpID, int targetTank);
    bool removePump(int tankID, int pumpID);
    bool fill(int tankID, int fuel);    // fill the tank with fuel
    // transfer fuel from a tank through a pump
    bool drain(int tankID, int pumpID, int fuel);
    int totalFuel() const;  // return the total fuel of airplane
    // the dump function is provided to facilitate debugging
    // using dump function for test cases is not accepted
    void dumpSys() const;
    void dumpPumps(Pump* pumps) const;
    private:
    Tank * m_current;

    // ***************************************************
    // Any private helper functions must be delared here!
    // ***************************************************

};
#endif