// Copyright (c) 2022 Dominic Masters
// 
// This software is released under the MIT License.
// https://opensource.org/licenses/MIT

#include "Material.hpp"
#include "scene/Scene.hpp"
#include "game/DawnGame.hpp"

using namespace Dawn;

Material::Material(SceneItem *item) : SceneItemComponent(item) {
  this->shader = item->scene->game->renderManager.getDefaultShader();
  this->updateShaderParameters();
}

void Material::updateShaderParameters() {
  this->colorValues.clear();
  this->boolValues.clear();

  this->parameters = this->shader->getParameters();
  this->shader->setDefaultParameters(this);

  // We do need to validate these params at some point to make sure that the
  // shader has actually bound them.
}

void Material::setShaderParameters() {
  auto it = this->parameters.begin();
  while(it != this->parameters.end()) {
    switch(it->second) {
      case SHADER_PARAMETER_TYPE_COLOR:
        this->shader->setColor(it->first, this->colorValues[it->first]);
        break;

      case SHADER_PARAMETER_TYPE_MATRIX:
        this->shader->setMatrix(it->first, this->matrixValues[it->first]);
        break;

      case SHADER_PARAMETER_TYPE_BOOLEAN:
        this->shader->setBoolean(it->first, this->boolValues[it->first]);
        break;

      case SHADER_PARAMETER_TYPE_VECTOR3:
        this->shader->setVector3(it->first, this->vec3Values[it->first]);
        break;
      
      case SHADER_PARAMETER_TYPE_TEXTURE:
        this->shader->setTexture(it->first, this->textureValues[it->first]);
        break;

      case SHADER_PARAMETER_TYPE_FLOAT:
        this->shader->setFloat(it->first, this->floatValues[it->first]);
        break;

      default:
        throw "An unsupported or invalid shader parameter type was supplied.";
    }
    ++it;
  }
}

Shader * Material::getShader() {
  return this->shader;
}

void Material::setShader(Shader * shader) {
  this->shader = shader;
  this->updateShaderParameters();
}