#define HANDMADE_MATH_CPP_MODE
#include "../HandmadeMath.h"

#include "gtest/gtest.h"


TEST(Initialization, Vectors)
{
    //
    // Test vec2
    // 
    hmm_vec2 v2 = HMM_Vec2(1.0f, 2.0f);
    hmm_vec2 v2i = HMM_Vec2(1, 2);

    EXPECT_FLOAT_EQ(v2.Elements[0], 1.0f);
    EXPECT_FLOAT_EQ(v2.Elements[1], 2.0f);

    EXPECT_FLOAT_EQ(v2i.Elements[0], 1.0f);
    EXPECT_FLOAT_EQ(v2i.Elements[1], 2.0f);

    //
    // Test vec3
    //
    hmm_vec3 v3 = HMM_Vec3(1.0f, 2.0f, 3.0f);
    hmm_vec3 v3i = HMM_Vec3i(1, 2, 3);

    EXPECT_FLOAT_EQ(v3.Elements[0], 1.0f);
    EXPECT_FLOAT_EQ(v3.Elements[1], 2.0f);
    EXPECT_FLOAT_EQ(v3.Elements[2], 3.0f);

    EXPECT_FLOAT_EQ(v3i.Elements[0], 1.0f);
    EXPECT_FLOAT_EQ(v3i.Elements[1], 2.0f);
    EXPECT_FLOAT_EQ(v3i.Elements[2], 3.0f);

    //
    // Test vec4
    //
    hmm_vec4 v4 = HMM_Vec4(1.0f, 2.0f, 3.0f, 4.0f);
    hmm_vec4 v4i = HMM_Vec4i(1, 2, 3, 4);
    hmm_vec4 v4v = HMM_Vec4v(v3, 4.0f);

    EXPECT_FLOAT_EQ(v4.Elements[0], 1.0f);
    EXPECT_FLOAT_EQ(v4.Elements[1], 2.0f);
    EXPECT_FLOAT_EQ(v4.Elements[2], 3.0f);
    EXPECT_FLOAT_EQ(v4.Elements[3], 4.0f);

    EXPECT_FLOAT_EQ(v4i.Elements[0], 1.0f);
    EXPECT_FLOAT_EQ(v4i.Elements[1], 2.0f);
    EXPECT_FLOAT_EQ(v4i.Elements[2], 3.0f);
    EXPECT_FLOAT_EQ(v4i.Elements[3], 4.0f);

    EXPECT_FLOAT_EQ(v4v.Elements[0], 1.0f);
    EXPECT_FLOAT_EQ(v4v.Elements[1], 2.0f);
    EXPECT_FLOAT_EQ(v4v.Elements[2], 3.0f);
    EXPECT_FLOAT_EQ(v4v.Elements[3], 4.0f);
}

TEST(Initialization, MatrixEmpty)
{
    hmm_mat4 m4 = HMM_Mat4();
    for (int Column = 0; Column < 4; ++Column)
    {
        for (int Row = 0; Row < 4; ++Row)
        {
            EXPECT_FLOAT_EQ(m4.Elements[Column][Row], 0) << "At column " << Column << ", row " << Row;
        }
    }
}

TEST(Initialization, MatrixDiagonal)
{
    hmm_mat4 m4d = HMM_Mat4d(1.0f);
    for (int Column = 0; Column < 4; ++Column)
    {
        for (int Row = 0; Row < 4; ++Row)
        {
            if (Column == Row) {
                EXPECT_FLOAT_EQ(m4d.Elements[Column][Row], 1.0f) << "At column " << Column << ", row " << Row;
            } else {
                EXPECT_FLOAT_EQ(m4d.Elements[Column][Row], 0) << "At column " << Column << ", row " << Row;
            }
        }
    }
}