#ifndef INCLUDE_TEXTURE_DATA_IMPLEMENTATION
#	error Never include this file directly include 'texture_data.hpp'
#endif

namespace zgl
{
inline texture_data::texture_data(const GLuint texture_id)
	: m_handle{ texture_id } {}

inline texture_data::texture_data(texture_data&& other) noexcept
	: m_handle{ other.m_handle }
{
	other.m_handle.texture_id = 0;
}

inline texture_data& texture_data::operator=(texture_data&& other) noexcept
{
	if (&other != this)
	{
		this->~texture_data();

		m_handle = other.m_handle;

		other.m_handle.texture_id = 0;
	}

	return *this;
}

template<typename T>
std::error_code texture_data::build_from(
	std::span<const T> buffer,
	const GLenum format,
	const GLenum type,
	const GLsizei width,
	const GLsizei height,
	texture_data& data
) {
	GLuint texture_id;

	glGenTextures(1, &texture_id);
	glBindTexture(GL_TEXTURE_2D, texture_id);

	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);

	glTexImage2D(
		GL_TEXTURE_2D, 0,
		GL_RGBA8,
		width,
		height,
		0,
		format, type,
		buffer.data()
	);
	glGenerateMipmap(GL_TEXTURE_2D);

	glBindTexture(GL_TEXTURE_2D, 0);

	data = texture_data(texture_id);

	return {};
}

inline texture_data::~texture_data()
{
	if (m_handle.texture_id)
	{
		glDeleteTextures(1, &m_handle.texture_id);
	}
}

inline texture_handle texture_data::handle() const
{
	return { m_handle.texture_id };
}
}