/**
	This file is a part of our_dick
	Copyright (C) 2020 rexy712

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Affero General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU Affero General Public License for more details.

	You should have received a copy of the GNU Affero General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "graphics/vao.hpp"
#include <utility> //exchange, swap

namespace gfx{

	void vertex_attribute::enable_array_mode(){
		glBindVertexArray(m_vao);
		glEnableVertexAttribArray(m_index);
	}
	void vertex_attribute::disable_array_mode(){
		glBindVertexArray(m_vao);
		glEnableVertexAttribArray(m_index);
	}
	void vertex_attribute::set_float_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_FLOAT, GL_FALSE, sizeof(GLfloat) * stride, (void*)(sizeof(GLfloat) * offset));
	}
	void vertex_attribute::set_double_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_DOUBLE, GL_FALSE, sizeof(GLdouble) * stride, (void*)(sizeof(GLdouble) * offset));
	}
	void vertex_attribute::set_byte_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_BYTE, GL_FALSE, sizeof(GLbyte) * stride, (void*)(sizeof(GLbyte) * offset));
	}
	void vertex_attribute::set_ubyte_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_UNSIGNED_BYTE, GL_FALSE, sizeof(GLubyte) * stride, (void*)(sizeof(GLubyte) * offset));
	}
	void vertex_attribute::set_short_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_SHORT, GL_FALSE, sizeof(GLshort) * stride, (void*)(sizeof(GLshort) * offset));
	}
	void vertex_attribute::set_ushort_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_UNSIGNED_SHORT, GL_FALSE, sizeof(GLushort) * stride, (void*)(sizeof(GLushort) * offset));
	}
	void vertex_attribute::set_int_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_INT, GL_FALSE, sizeof(GLint) * stride, (void*)(sizeof(GLint) * offset));
	}
	void vertex_attribute::set_uint_pointer(GLint size, GLsizei stride, GLsizei offset){
		glBindVertexArray(m_vao);
		glVertexAttribPointer(m_index, size, GL_UNSIGNED_INT, GL_FALSE, sizeof(GLuint) * stride, (void*)(sizeof(GLuint) * offset));
	}
	void vertex_attribute::set(GLfloat x){
		glBindVertexArray(m_vao);
		glVertexAttrib1f(m_index, x);
	}
	void vertex_attribute::set(GLshort x){
		glBindVertexArray(m_vao);
		glVertexAttrib1s(m_index, x);
	}
	void vertex_attribute::set(GLdouble x){
		glBindVertexArray(m_vao);
		glVertexAttrib1d(m_index, x);
	}
	void vertex_attribute::set(GLint x){
		glBindVertexArray(m_vao);
		glVertexAttribI1i(m_index, x);
	}
	void vertex_attribute::set(GLuint x){
		glBindVertexArray(m_vao);
		glVertexAttribI1ui(m_index, x);
	}
	void vertex_attribute::set(GLfloat x, GLfloat y){
		glBindVertexArray(m_vao);
		glVertexAttrib2f(m_index, x, y);
	}
	void vertex_attribute::set(GLshort x, GLshort y){
		glBindVertexArray(m_vao);
		glVertexAttrib2s(m_index, x, y);
	}
	void vertex_attribute::set(GLdouble x, GLdouble y){
		glBindVertexArray(m_vao);
		glVertexAttrib2d(m_index, x, y);
	}
	void vertex_attribute::set(GLint x, GLint y){
		glBindVertexArray(m_vao);
		glVertexAttribI2i(m_index, x, y);
	}
	void vertex_attribute::set(GLuint x, GLuint y){
		glBindVertexArray(m_vao);
		glVertexAttribI2ui(m_index, x, y);
	}
	void vertex_attribute::set(GLfloat x, GLfloat y, GLfloat z){
		glBindVertexArray(m_vao);
		glVertexAttrib3f(m_index, x, y, z);
	}
	void vertex_attribute::set(GLshort x, GLshort y, GLshort z){
		glBindVertexArray(m_vao);
		glVertexAttrib3s(m_index, x, y, z);
	}
	void vertex_attribute::set(GLdouble x, GLdouble y, GLdouble z){
		glBindVertexArray(m_vao);
		glVertexAttrib3d(m_index, x, y, z);
	}
	void vertex_attribute::set(GLint x, GLint y, GLint z){
		glBindVertexArray(m_vao);
		glVertexAttribI3i(m_index, x, y, z);
	}
	void vertex_attribute::set(GLuint x, GLuint y, GLuint z){
		glBindVertexArray(m_vao);
		glVertexAttribI3ui(m_index, x, y, z);
	}
	void vertex_attribute::set(GLfloat x, GLfloat y, GLfloat z, GLfloat w){
		glBindVertexArray(m_vao);
		glVertexAttrib4f(m_index, x, y, z, w);
	}
	void vertex_attribute::set(GLshort x, GLshort y, GLshort z, GLshort w){
		glBindVertexArray(m_vao);
		glVertexAttrib4s(m_index, x, y, z, w);
	}
	void vertex_attribute::set(GLdouble x, GLdouble y, GLdouble z, GLdouble w){
		glBindVertexArray(m_vao);
		glVertexAttrib4d(m_index, x, y, z, w);
	}
	void vertex_attribute::set(GLint x, GLint y, GLint z, GLint w){
		glBindVertexArray(m_vao);
		glVertexAttribI4i(m_index, x, y, z, w);
	}
	void vertex_attribute::set(GLuint x, GLuint y, GLuint z, GLuint w){
		glBindVertexArray(m_vao);
		glVertexAttribI4ui(m_index, x, y, z, w);
	}
	void vertex_attribute::set(const vec2<GLfloat>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib2fv(m_index, v);
	}
	void vertex_attribute::set(const vec2<GLshort>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib2sv(m_index, v);
	}
	void vertex_attribute::set(const vec2<GLdouble>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib2dv(m_index, v);
	}
	void vertex_attribute::set(const vec2<GLint>& v){
		glBindVertexArray(m_vao);
		glVertexAttribI2iv(m_index, v);
	}
	void vertex_attribute::set(const vec2<GLuint>& v){
		glBindVertexArray(m_vao);
		glVertexAttribI2uiv(m_index, v);
	}
	void vertex_attribute::set(const vec3<GLfloat>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib3fv(m_index, v);
	}
	void vertex_attribute::set(const vec3<GLshort>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib3sv(m_index, v);
	}
	void vertex_attribute::set(const vec3<GLdouble>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib3dv(m_index, v);
	}
	void vertex_attribute::set(const vec3<GLint>& v){
		glBindVertexArray(m_vao);
		glVertexAttribI3iv(m_index, v);
	}
	void vertex_attribute::set(const vec3<GLuint>& v){
		glBindVertexArray(m_vao);
		glVertexAttribI3uiv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLfloat>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4fv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLshort>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4sv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLdouble>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4dv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLint>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4iv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLuint>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4uiv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLbyte>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4bv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLubyte>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4ubv(m_index, v);
	}
	void vertex_attribute::set(const vec4<GLushort>& v){
		glBindVertexArray(m_vao);
		glVertexAttrib4usv(m_index, v);
	}


	vao::vao(){
		glGenVertexArrays(1, &m_buffer);
	}
	vao::vao(vao&& v):
		m_buffer(std::exchange(v.m_buffer, 0)){}
	vao::~vao(){
		if(m_buffer)
			glDeleteVertexArrays(1, &m_buffer);
	}
	vao& vao::operator=(vao&& v){
		std::swap(m_buffer, v.m_buffer);
		return *this;
	}
	GLuint vao::raw()const{
		return m_buffer;
	}

	vertex_attribute vao::get_attribute(int index){
		return vertex_attribute(m_buffer, index);
	}
	void vao::bind(){
		glBindVertexArray(m_buffer);
	}
	void vao::unbind(){
		glBindVertexArray(0);
	}


}