// train.h

#include "train.h"
#include <iostream>
#include <vector>
using namespace std;

Train::Train() { }

Train::~Train() {
    for(Car *c : cars)
        delete c;
}

void Train::add(Car *car) {
    cars.push_back(car);
}

float Train::currentMt() const {
    float sum = 0.0;
    for(Car *c : cars)
        sum += c->currentMt();
    return sum;
}

Car::Car() { }

Car::~Car() { }

void Car::brake() { cout << "Brakes engaged for car." << endl; }

float Car::currentMt() const {
    return measuredMt;
}

Locomotive::Locomotive() { }

void Locomotive::disengage() {
    cout << "Turning locomotive off." << endl;
}

void Locomotive::engage() {
    cout << "Turning locomotive on." << endl;
};

float Locomotive::maxMt() const {
  return currentMt();
}

Wagon::Wagon() { }

float Wagon::maxMt() const { return 100.0; }

BoxCar::BoxCar() { } 

float BoxCar::volume() const { // in cubic feet
    // based on info at https://cs.trains.com/trn/f/111/t/127097.aspx
    return 40.5 * 10.5 * 9.5; // length * height * width
}

Tanker::Tanker() { }

float Tanker::volume() const {
    float radius = 10.5 / 2.0;
    return 40.5 * 3.14159 * radius * radius;
}

float Tanker::maxMt() const {
    // assume max of 4 grams per cubic centimeter (since heavy liquids
    // start at 2g), 28300 cubic cm per cubic foot
    return volume() * 4 * 28300 / 1e6;
}