/*!
 * 01_colors.cpp
 *
 * Copyright (c) 2015-2024, NADAL Jean-Baptiste. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301 USA
 *
 * @Author:  NADAL Jean-Baptiste
 * @Date: 30/01/2024
 *
 */

/*---------------------------------------------------------------------------*/

#include <catch.hpp>

#include "color.h"

using namespace Raytracer;

/* ------------------------------------------------------------------------- */

TEST_CASE("colors are (red,green,blue) tuples", "[Colors]")
{
    Color c(-0.5, 0.4, 1.7);

    REQUIRE(c.red() == -0.5);
    REQUIRE(c.green() == 0.4);
    REQUIRE(c.blue() == 1.7);
}

/* ------------------------------------------------------------------------- */

TEST_CASE("Colors could be copied", "[Colors]")
{
    Color c1(-0.5, 0.4, 1.7);
    Color c2;

    c2 = c1;

    REQUIRE(c2.red() == -0.5);
    REQUIRE(c2.green() == 0.4);
    REQUIRE(c2.blue() == 1.7);
}

/* ------------------------------------------------------------------------- */

TEST_CASE("Adding colors", "[Colors]")
{
    Color c1(0.9, 0.6, 0.75);
    Color c2(0.7, 0.1, 0.25);

    //Color c3 = c1 + c2;

    REQUIRE((c1 + c2) == Color(1.6, 0.7, 1.0));
}

/* ------------------------------------------------------------------------- */

TEST_CASE("Adding colors without modify c1", "[Colors]")
{
    Color c1(0.9, 0.6, 0.75);
    Color c2(0.7, 0.1, 0.25);

    Color c3 = c1 + c2;

    REQUIRE((c1 + c2) == Color(1.6, 0.7, 1.0));
}

/* ------------------------------------------------------------------------- */

TEST_CASE("Subtracting colors", "[Colors]")
{
    Color c1(0.9, 0.6, 0.75);
    Color c2(0.7, 0.1, 0.25);

    REQUIRE((c1 - c2) == Color(0.2, 0.5, 0.5));
}

/* ------------------------------------------------------------------------- */

TEST_CASE("Multiplying a color by a scalar", "[Colors]")
{
    Color c(0.2, 0.3, 0.4);

    REQUIRE(c * 2 == Color(0.4, 0.6, 0.8));
}