#include <iostream>	//for cerr
#include <iomanip>	//for the io manipulator setw
#include <cstdlib>	//for exit and EXIT_FAILURE
#include "color.h"
using namespace std;

color::color(int initial_red, int initial_green, int initial_blue)
	: red(initial_red), green(initial_green), blue(initial_blue)
{
	if (red < 0 || red > 255) {
		cerr << "bad initial red " << red << "\n";
		exit(EXIT_FAILURE);
	}

	if (green < 0 || green > 255) {
		cerr << "bad initial green " << green << "\n";
		exit(EXIT_FAILURE);
	}

	if (blue < 0 || blue > 255) {
		cerr << "bad initial green " << green << "\n";
		exit(EXIT_FAILURE);
	}
}

bool operator==(const color& color1, const color& color2)
{
	return color1.red == color2.red
		&& color1.green == color2.green
		&& color1.blue == color2.blue;
}

color& color::operator+=(const color& another)
{
	red += another.red;
	green += another.green;
	blue += another.blue;
	return *this;
}

color& color::operator-=(const color& another)
{
	red -= another.red;
	green -= another.green;
	blue -= another.blue;
	return *this;
}

color& color::operator*=(double d)
{
	red *= d;
	green *= d;
	blue *= d;
	return *this;
}

color& color::operator/=(double d)
{
	red /= d;
	green /= d;
	blue /= d;
	return *this;
}

void color::print() const
{
	cout << '#' << hex << uppercase << setfill('0')
		<< setw(2) << red	//setw evaporates after one use
		<< setw(2) << green
		<< setw(2) << blue
		<< dec;
}

ostream& operator<<(ostream& ost, const color& c)
{
	return ost << '#' << hex << uppercase << setfill('0')
		<< setw(2) << c.red
		<< setw(2) << c.green
		<< setw(2) << c.blue
		<< dec;
}