# Copyright (C) The libssh2 project and its contributors.
# SPDX-License-Identifier: BSD-3-Clause
#
###########################################################################
# Find the wolfssl library
#
# Input variables:
#
# WOLFSSL_INCLUDE_DIR   The wolfssl include directory
# WOLFSSL_LIBRARY       Path to wolfssl library
#
# Result variables:
#
# WOLFSSL_FOUND         System has wolfssl
# WOLFSSL_INCLUDE_DIRS  The wolfssl include directories
# WOLFSSL_LIBRARIES     The wolfssl library names
# WOLFSSL_LIBRARY_DIRS  The wolfssl library directories
# WOLFSSL_CFLAGS        Required compiler flags
# WOLFSSL_VERSION       Version of wolfssl

if((UNIX OR VCPKG_TOOLCHAIN OR (MINGW AND NOT CMAKE_CROSSCOMPILING)) AND
   NOT DEFINED WOLFSSL_INCLUDE_DIR AND
   NOT DEFINED WOLFSSL_LIBRARY)
  find_package(PkgConfig QUIET)
  pkg_check_modules(WOLFSSL "wolfssl")
endif()

if(WOLFSSL_FOUND)
  string(REPLACE ";" " " WOLFSSL_CFLAGS "${WOLFSSL_CFLAGS}")
  message(STATUS "Found WolfSSL (via pkg-config): ${WOLFSSL_INCLUDE_DIRS} (found version \"${WOLFSSL_VERSION}\")")
else()
  find_path(WOLFSSL_INCLUDE_DIR NAMES "wolfssl/options.h")
  find_library(WOLFSSL_LIBRARY NAMES "wolfssl")

  if(WOLFSSL_INCLUDE_DIR AND EXISTS "${WOLFSSL_INCLUDE_DIR}/wolfssl/version.h")
    set(_version_regex "#[\t ]*define[\t ]+LIBWOLFSSL_VERSION_STRING[\t ]+\"([^\"]*)\"")
    file(STRINGS "${WOLFSSL_INCLUDE_DIR}/wolfssl/version.h" _version_str REGEX "${_version_regex}")
    string(REGEX REPLACE "${_version_regex}" "\\1" _version_str "${_version_str}")
    set(WOLFSSL_VERSION "${_version_str}")
    unset(_version_regex)
    unset(_version_str)
  endif()

  include(FindPackageHandleStandardArgs)
  find_package_handle_standard_args(WolfSSL
    REQUIRED_VARS
      WOLFSSL_INCLUDE_DIR
      WOLFSSL_LIBRARY
    VERSION_VAR
      WOLFSSL_VERSION
  )

  if(WOLFSSL_FOUND)
    set(WOLFSSL_INCLUDE_DIRS ${WOLFSSL_INCLUDE_DIR})
    set(WOLFSSL_LIBRARIES    ${WOLFSSL_LIBRARY})
  endif()

  mark_as_advanced(WOLFSSL_INCLUDE_DIR WOLFSSL_LIBRARY)
endif()