#pragma once

#include "opengl/shader_program_variable.hpp"

#include "util/enum_bitfield_operators.hpp"
#include <array>
#include <string_view>

namespace zgl::shading::attributes::mesh
{

enum class flags : std::uint8_t
{
	none = 0,
	position = 1 << 0,
	normal = 1 << 1,
	luminance = 1 << 2,
	color = 1 << 3,
	alpha = 1 << 4,
	tex_coord = 1 << 5
};

constexpr inline auto position = shader_program_variable({ GL_FLOAT_VEC3, 0 }, "model_vertex_position");
constexpr inline auto normal = shader_program_variable({ GL_FLOAT_VEC3, 1 }, "model_vertex_normal");
constexpr inline auto luminance = shader_program_variable({ GL_FLOAT, 2 }, "model_vertex_l");
constexpr inline auto color = shader_program_variable({ GL_FLOAT_VEC3, 2 }, "model_vertex_rgb");
constexpr inline auto alpha = shader_program_variable({ GL_FLOAT, 3 }, "model_vertex_a");
constexpr inline auto tex_coord = shader_program_variable({ GL_FLOAT_VEC2, 2 }, "model_vertex_tex_coord");

constexpr inline auto all = std::array{
	position, normal, luminance, color, alpha, tex_coord
};

constexpr inline auto names = std::array<std::string_view, 6>{
	"position",
	"normal",
	"luminance",
	"color",
	"alpha",
	"tex_coord"
};

}

DEFINE_ENUM_BITFIELD_OPERATORS(zgl::shading::attributes::mesh::flags)