/*
 * Copyright 2022 Frederico de Oliveira Linhares
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include "vector_4d.hpp"

#include <memory>

#include <glm/vec4.hpp>

void
cg_free_vector_4d(mrb_state *mrb, void* obj)
{
  auto ptr = static_cast<std::shared_ptr<glm::vec4>*>(obj);

  ptr->~shared_ptr();
  mrb_free(mrb, ptr);
}

const struct mrb_data_type cg_vector_4d_type = {
  "CG_Vector4D", cg_free_vector_4d};

static mrb_value
cg_cVector4D_initialize(mrb_state *mrb, mrb_value self)
{
  mrb_float x = 0.0f;
  mrb_float y = 0.0f;
  mrb_float w = 0.0f;
  mrb_float h = 0.0f;
  std::shared_ptr<glm::vec4> *ptr;

  mrb_get_args(mrb, "|ffff", &x, &y, &w, &h);
  ptr = (std::shared_ptr<glm::vec4>*)DATA_PTR(self);
  if(ptr) mrb_free(mrb, ptr);
  ptr = (std::shared_ptr<glm::vec4>*)mrb_malloc(
    mrb, sizeof(std::shared_ptr<glm::vec4>));

  new(ptr)std::shared_ptr<glm::vec4>(std::make_shared<glm::vec4>(x, y, w, h));

  mrb_data_init(self, ptr, &cg_vector_4d_type);
  return self;
}

mrb_value
cg_cVector4D_get_x(mrb_state *mrb, mrb_value self)
{
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  return mrb_float_value(mrb, (*ptr)->x);
}

mrb_value
cg_cVector4D_get_y(mrb_state *mrb, mrb_value self)
{
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  return mrb_float_value(mrb, (*ptr)->y);
}

mrb_value
cg_cVector4D_get_w(mrb_state *mrb, mrb_value self)
{
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  return mrb_float_value(mrb, (*ptr)->z);
}

mrb_value
cg_cVector4D_get_h(mrb_state *mrb, mrb_value self)
{
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  return mrb_float_value(mrb, (*ptr)->w);
}

static mrb_value
cg_cVector4D_set_x(mrb_state *mrb, mrb_value self)
{
  mrb_float x;
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  mrb_get_args(mrb, "f", &x);
  (*ptr)->x = x;

  return self;
}

static mrb_value
cg_cVector4D_set_y(mrb_state *mrb, mrb_value self)
{
  mrb_float y;
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  mrb_get_args(mrb, "f", &y);
  (*ptr)->y = y;

  return self;
}

static mrb_value
cg_cVector4D_set_w(mrb_state *mrb, mrb_value self)
{
  mrb_float w;
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  mrb_get_args(mrb, "f", &w);
  (*ptr)->z = w;

  return self;
}

static mrb_value
cg_cVector4D_set_h(mrb_state *mrb, mrb_value self)
{
  mrb_float h;
  std::shared_ptr<glm::vec4> *ptr =
    (std::shared_ptr<glm::vec4>*)DATA_PTR(self);

  mrb_get_args(mrb, "f", &h);
  (*ptr)->w = h;

  return self;
}

void
cg_vector_4d_init(mrb_state *mrb)
{
  struct RClass *cg_m, *cg_cVector4D;

  cg_m = mrb_module_get(mrb, "CandyGear");
  cg_cVector4D = mrb_define_class_under(
    mrb, cg_m, "Vector4D", mrb->object_class);
  MRB_SET_INSTANCE_TT(cg_cVector4D, MRB_TT_DATA);
  mrb_define_method(
    mrb, cg_cVector4D, "initialize", cg_cVector4D_initialize,
    MRB_ARGS_NONE()|MRB_ARGS_OPT(4));

  mrb_define_method(
    mrb, cg_cVector4D, "x", cg_cVector4D_get_x, MRB_ARGS_NONE());
  mrb_define_method(
    mrb, cg_cVector4D, "y", cg_cVector4D_get_y, MRB_ARGS_NONE());
  mrb_define_method(
    mrb, cg_cVector4D, "w", cg_cVector4D_get_w, MRB_ARGS_NONE());
  mrb_define_method(
    mrb, cg_cVector4D, "h", cg_cVector4D_get_h, MRB_ARGS_NONE());
  mrb_define_method(
    mrb, cg_cVector4D, "r", cg_cVector4D_get_x, MRB_ARGS_NONE());
  mrb_define_method(
    mrb, cg_cVector4D, "g", cg_cVector4D_get_y, MRB_ARGS_NONE());
  mrb_define_method(
    mrb, cg_cVector4D, "b", cg_cVector4D_get_w, MRB_ARGS_NONE());
  mrb_define_method(
    mrb, cg_cVector4D, "a", cg_cVector4D_get_h, MRB_ARGS_NONE());

  mrb_define_method(
    mrb, cg_cVector4D, "x=", cg_cVector4D_set_x, MRB_ARGS_REQ(1));
  mrb_define_method(
    mrb, cg_cVector4D, "y=", cg_cVector4D_set_y, MRB_ARGS_REQ(1));
  mrb_define_method(
    mrb, cg_cVector4D, "w=", cg_cVector4D_set_w, MRB_ARGS_REQ(1));
  mrb_define_method(
    mrb, cg_cVector4D, "h=", cg_cVector4D_set_h, MRB_ARGS_REQ(1));
  mrb_define_method(
    mrb, cg_cVector4D, "r=", cg_cVector4D_set_x, MRB_ARGS_REQ(1));
  mrb_define_method(
    mrb, cg_cVector4D, "g=", cg_cVector4D_set_y, MRB_ARGS_REQ(1));
  mrb_define_method(
    mrb, cg_cVector4D, "b=", cg_cVector4D_set_w, MRB_ARGS_REQ(1));
  mrb_define_method(
    mrb, cg_cVector4D, "a=", cg_cVector4D_set_h, MRB_ARGS_REQ(1));
}