#include "car.h"

Car::Car()
{
	make = "N/A"; // the make is unknown
	model = "N/A"; // the model is unknown
	year = 0;
	running = false;
	gear = 'P';
	speed = 0;
}

Car::Car(int _year, string _make, string _model)
{
	make = _make;
	model = _model;
	year = _year;
	running = false;
	gear = 'P';
	speed = 0;
}

int Car::getSpeed() const
{
	return speed;
}

char Car::getGear() const
{
	return gear;
}

string Car::getMake() const
{
	return make;
}

string Car::getModel() const
{
	return model;
}

int Car::getYear() const
{
	return year;
}

void Car::printStatus() const
{
	cout << "year:\t" << year << endl;
	cout << "make:\t" << make << endl;
	cout << "model:\t" << model << endl;
	cout << "engine:\t";

	if(running)
	{
		cout << "running" << endl;
	}
	else
	{
		cout << "off" << endl;
	}

	cout << "gear:\t" << gear << endl;
	cout << "speed:\t" << speed << " MPH" << endl;
}

bool Car::isRunning() const
{
	return running;
}

void Car::start()
{
	running = true;
}

bool Car::changeGear(char _gear)
{
	char valid_gears[] = "PDRN"; // automatic transmission car with 4 gears
	bool valid = false; // set it to valid until we check whether _gear is valid or not

	// step through the 4 different entries in the valid_gears array
	for(int i = 0; i < 4; i++)
	{
		// If the value of _gear matches any of the valid gears in the
		// valid_gears array, then go ahead and change the gear.
		// The gear will not be changed otherwise, because we can't change gears
		// to some invalid gear like 'Z' for example
		if(_gear == valid_gears[i]) 
		{
			valid = true;
			gear = _gear;
			break;
		}
	}

	return valid;
}

bool Car::accelerate(int x)
{
	// acceleration must be greater than the current speed,
	// otherwise it wouldn't be called accelerate
	if(x > 0 && x > speed)
	{
		speed = x;
		return true;
	}

	return false;
}

bool Car::decelerate(int x)
{
	// deceleration must be between the current speed and 0,
	// because you can't have a negative speed, and slowing 
	// down means going less than your current speed
	if(x >= 0 && x < speed)
	{
		speed = x;
		return true;
	}

	return false;
}

void Car::turnOff()
{
	running = false; // turn of the engine now
}