/**
 * @file     	Version.h
 * @brief    	SDK version information routines.
 * @copyright	VisionLabs LLC
 * @date		11.10.2016
 * */

#pragma once

#include "Def.h"
#include <cstdint>

namespace fsdk {

/**
 * @addtogroup VersionGroup Version
 * @brief SDK Build type and version info.
 * @{
 * */

	/**
	 * Version structure.
	 * */
	struct Version {
		uint8_t major;		//!< Major version number.
		uint8_t minor;		//!< Minor version number.
		uint16_t patch;		//!< Revision number.
	};

	/**
	 * @brief Check if one version is less than another.
	 * @param lhs first version
	 * @param rhs second version
	 * @return true if lhs is less than rhs
	 * */
	inline bool operator < (Version lhs, Version rhs) noexcept {
		if (lhs.major < rhs.major)
			return true;
		if (lhs.minor < rhs.minor)
			return true;
		return lhs.patch < rhs.patch;
	}

	/**
	 * @brief Check if versions are equal.
	 * @param lhs first version
	 * @param rhs second version
	 * @return true if versions are equal
	 * */
	inline bool operator == (Version lhs, Version rhs) noexcept {
		return	lhs.major == rhs.major && 
				lhs.minor == rhs.minor && 
				lhs.patch == rhs.patch;
	}

	/**
	 * @brief Check if versions are not equal.
	 * @param lhs first version
	 * @param rhs second version
	 * @return true if versions are not equal
	 * */
	inline bool operator != (Version lhs, Version rhs) noexcept {
		return !(lhs == rhs);
	}

	/**
	 * @brief Get FaceEngine version.
	 * @return filled version structure.
	 * */
	FSDK_API Version getVersion() noexcept;
	
	/**
	 * @brief Get FaceEngine commit hash.
	 * @return commit hash as a null-terminated string.
	 * */
	FSDK_API const char* getVersionHash() noexcept;

	/**
	 * @brief Get FaceEngine version string.
	 * @return version as a null-terminated string.
	 * */
	FSDK_API const char* getVersionString() noexcept;

	/**
	 * @brief Get FaceEngine build description.
	 * The descripton contains used flags and compler settings.
	 * @return description as a null-terminated string.
	 * */
	FSDK_API const char* getBuildInfo() noexcept;

/** @} */ // end of VersionGroup
}