// Copyright (c) 2023 Dominic Masters
// 
// This software is released under the MIT License.
// https://opensource.org/licenses/MIT

#pragma once
#include "dawnlibs.hpp"

namespace Dawn {
  enum class ShaderParameterType {
    VEC2,
    VEC3,
    VEC4,
    MAT3,
    MAT4,
    COLOR,
    FLOAT,
    INT,
    TEXTURE,
    BOOLEAN
  };

  class IShaderBase {
    public:
      virtual ~IShaderBase() {

      }
  };

  template<typename T>
  class IShader : public IShaderBase {
    protected:
      T data;

    public:
      /**
       * Returns the currently uploaded data on the Shader.
       * 
       * @return The uploaded data.
       */
      T getData() {
        return data;
      }

      /**
       * Sets the entire data to be uploaded.
       * 
       * @param data Data to be uploaded.
       */
      void setData(const T data) {
        this->data = data;
      }

      /**
       * Initializes the shader, this needs to be called before the shader can
       * be used.
       */
      virtual void init() = 0;

      /**
       * Binds the shader as the current one, does not upload any data, somewhat
       * relies on something else uploading the data.
       */
      virtual void bind() = 0;

      /**
       * Uploads the data to the GPU.
       */
      virtual void upload() = 0;

      /**
       * Disposes of the shader.
       */
      virtual ~IShader() {
        
      }
  };
}