struct Character
{
    unsigned int TextureID;
    glm::ivec2   Size;
    glm::ivec2   Bearing;
    unsigned int Advance;
};

struct Text
{
    std::string text;
    glm::vec2   position;
    glm::vec2   scale;
    float       rotation;
    glm::vec4   color;
    std::string font;
};

inline std::map<std::string, std::map<char, Character>> fonts;

void LoadFont(const std::string& fontPath)
{
    if (fonts.find(fontPath) != fonts.end())
    {
        // Font already loaded
        return;
    }

    FT_Face face;
    if (FT_New_Face(ft, fontPath.c_str(), 0, &face))
    {
        std::cerr << "ERROR::FREETYPE: Failed to load font" << std::endl;
        return;
    }
    FT_Set_Pixel_Sizes(face, 0, 48);

    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);

    std::map<char, Character> characters;
    for (GLubyte c = 0; c < 128; c++)
    {
        if (FT_Load_Char(face, c, FT_LOAD_RENDER))
        {
            std::cerr << "ERROR::FREETYPE: Failed to load Glyph" << std::endl;
            continue;
        }
        GLuint texture;
        glGenTextures(1, &texture);
        glBindTexture(GL_TEXTURE_2D, texture);
        glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, face->glyph->bitmap.width, face->glyph->bitmap.rows,
                     0, GL_RED, GL_UNSIGNED_BYTE, face->glyph->bitmap.buffer);

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

        Character character = {texture,
                               glm::ivec2(face->glyph->bitmap.width, face->glyph->bitmap.rows),
                               glm::ivec2(face->glyph->bitmap_left, face->glyph->bitmap_top),
                               static_cast<GLuint>(face->glyph->advance.x)};

        characters.insert(std::pair<char, Character>(c, character));
    }
    fonts.insert(std::pair<std::string, std::map<char, Character>>(fontPath, characters));

    FT_Done_Face(face);
}