#ifndef CONSTANTS_HPP
#include <GLFW/glfw3.h>
#include <iostream>
#include <string_view>

namespace constants 
{
    // best practice is to use inline constexpr std::string_view but glfwCreateWindow takes only char* as input
    inline const char* MAIN_WINDOW_NAME { "Match" }; 
    inline constexpr int MAIN_WINDOW_WIDTH { 800 };
    inline constexpr int MAIN_WINDOW_HEIGHT { 600 };
    inline constexpr struct  { 
        GLfloat red = 1.0f;
        GLfloat green = 0.0f;
        GLfloat blue = 0.0f;
        GLfloat alpha = 1.0f;
    } RED;

        inline constexpr struct  { 
        GLfloat red = 1.0f;
        GLfloat green = 1.0f;
        GLfloat blue = 1.0f;
        GLfloat alpha = 1.0f;
    } WHITE;

    inline constexpr struct  { 
        GLfloat red = 0.2f;
        GLfloat green = 0.3f;
        GLfloat blue = 0.3f;
        GLfloat alpha = 1.0f;
    } LEARN_OPEN_GL_COLOR;

    // we write vertex shader 
    // version of glsl (since ogl 3.3 same as ogl so we pick 330)
    // in this shader we just forward input data to shader output
    inline const char *vertexShaderSource { "#version 330 core\n"
    "layout (location = 0) in vec3 aPos;\n"
    "void main()\n"
    "{\n"
    "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
    "}\0" } ;

    // write fragment shader
    // we set the color of each pixel to be orange
    inline const char *fragmentShaderSource {
        "#version 330 core\n"
        "out vec4 FragColor;\n"
        "void main()\n"
        "{\n"
            "FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
        "}\0"
    };

}

#endif