#pragma once

#include "opengl/shader_program_variable.hpp"
#include <array>

namespace shader_program::attributes::mesh
{

enum class flags : int {
	none = 0,
	position = 1 << 0,
	normal = 1 << 1,
	tex_coord = 1 << 2
};

constexpr inline auto position = zgl::shader_program_variable({ GL_FLOAT_VEC3, 0 }, "vertex_position");
constexpr inline auto normal = zgl::shader_program_variable({ GL_FLOAT_VEC3, 1 }, "vertex_normal");
constexpr inline auto tex_coord = zgl::shader_program_variable({ GL_FLOAT_VEC2, 2 }, "vertex_tex_coord");

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

}


[[nodiscard]] constexpr shader_program::attributes::mesh::flags operator|(
	const shader_program::attributes::mesh::flags& a, const shader_program::attributes::mesh::flags& b
) {
	return static_cast<shader_program::attributes::mesh::flags>(static_cast<int>(a) | static_cast<int>(b));
}

[[nodiscard]] constexpr shader_program::attributes::mesh::flags operator&(
	const shader_program::attributes::mesh::flags& a, const shader_program::attributes::mesh::flags& b
) {
	return static_cast<shader_program::attributes::mesh::flags>(static_cast<int>(a) & static_cast<int>(b));
}

[[nodiscard]] constexpr shader_program::attributes::mesh::flags operator^(
	const shader_program::attributes::mesh::flags& a, const shader_program::attributes::mesh::flags& b
) {
	return static_cast<shader_program::attributes::mesh::flags>(static_cast<int>(a) ^ static_cast<int>(b));
}

[[nodiscard]] constexpr shader_program::attributes::mesh::flags operator~(const shader_program::attributes::mesh::flags& a) {
	return static_cast<shader_program::attributes::mesh::flags>(~static_cast<int>(a));
}

constexpr shader_program::attributes::mesh::flags& operator|=(shader_program::attributes::mesh::flags& a, const shader_program::attributes::mesh::flags& b) {
	return a = a | b;
}

constexpr shader_program::attributes::mesh::flags& operator&=(shader_program::attributes::mesh::flags& a, const shader_program::attributes::mesh::flags& b) {
	return a = a & b;
}

constexpr shader_program::attributes::mesh::flags& operator^=(shader_program::attributes::mesh::flags& a, const shader_program::attributes::mesh::flags& b) {
	return a = a ^ b;
}

[[nodiscard]] constexpr bool operator<(
	shader_program::attributes::mesh::flags lhs, shader_program::attributes::mesh::flags rhs
) {
	return static_cast<int>(lhs) < static_cast<int>(rhs);
}

[[nodiscard]] constexpr bool operator<=(
	shader_program::attributes::mesh::flags lhs, shader_program::attributes::mesh::flags rhs
) {
	return static_cast<int>(lhs) <= static_cast<int>(rhs);
}

[[nodiscard]] constexpr bool operator>(
	shader_program::attributes::mesh::flags lhs, shader_program::attributes::mesh::flags rhs
) {
	return static_cast<int>(lhs) > static_cast<int>(rhs);
}

[[nodiscard]] constexpr bool operator>=(
	shader_program::attributes::mesh::flags lhs, shader_program::attributes::mesh::flags rhs
) {
	return static_cast<int>(lhs) >= static_cast<int>(rhs);
}