# Copyright (c) 2014 Alexander Lamaison <alexander.lamaison@gmail.com>
# Copyright (c) 2023 Viktor Szakats
#
# Redistribution and use in source and binary forms,
# with or without modification, are permitted provided
# that the following conditions are met:
#
#   Redistributions of source code must retain the above
#   copyright notice, this list of conditions and the
#   following disclaimer.
#
#   Redistributions in binary form must reproduce the above
#   copyright notice, this list of conditions and the following
#   disclaimer in the documentation and/or other materials
#   provided with the distribution.
#
#   Neither the name of the copyright holder nor the names
#   of any other contributors may be used to endorse or
#   promote products derived from this software without
#   specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
# CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
# OF SUCH DAMAGE.

if(CRYPTO_BACKEND)
  list(APPEND PRIVATE_COMPILE_DEFINITIONS ${CRYPTO_BACKEND_DEFINE})
  list(APPEND PRIVATE_INCLUDE_DIRECTORIES ${CRYPTO_BACKEND_INCLUDE_DIR})
else()
  message(FATAL_ERROR "No suitable cryptography backend found.")
endif()

## Options

option(CLEAR_MEMORY "Enable clearing of memory before being freed" ON)
if(NOT CLEAR_MEMORY)
  list(APPEND libssh2_DEFINITIONS LIBSSH2_NO_CLEAR_MEMORY)
endif()

option(ENABLE_ZLIB_COMPRESSION "Use zlib for compression")
add_feature_info(Compression ENABLE_ZLIB_COMPRESSION
  "using zlib for compression")
if(ENABLE_ZLIB_COMPRESSION)
  find_package(ZLIB REQUIRED)

  list(APPEND libssh2_INCLUDE_DIRS ${ZLIB_INCLUDE_DIRS})
  list(APPEND LIBRARIES ${ZLIB_LIBRARIES})
  list(APPEND PC_REQUIRES_PRIVATE zlib)
  if(ZLIB_FOUND)
    list(APPEND libssh2_DEFINITIONS LIBSSH2_HAVE_ZLIB)
  endif()
endif()

list(APPEND LIBRARIES ${SOCKET_LIBRARIES})

if(WIN32)
  list(APPEND PC_LIBS -lws2_32)
endif()

# to find generated header
list(APPEND libssh2_INCLUDE_DIRS ${CMAKE_CURRENT_BINARY_DIR})

if(MSVC)
  set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} /Zi /Od")
  set(CMAKE_SHARED_LINKER_FLAGS_DEBUG "${CMAKE_SHARED_LINKER_FLAGS_DEBUG} /DEBUG")
endif()

## Sources

include(GNUInstallDirs)
transform_makefile_inc("Makefile.inc" "${CMAKE_CURRENT_BINARY_DIR}/Makefile.inc.cmake")
# Get 'CSOURCES' and 'HHEADERS' variables
include(${CMAKE_CURRENT_BINARY_DIR}/Makefile.inc.cmake)
set(SOURCES ${CSOURCES} ${HHEADERS})

## Library definition

# Ensure that the static library and import library filenames are different,
# when building both static and shared library. On Windows, with certain
# toolchains (e.g. MSVC) these libraries get the same by default, overwriting
# each other. MinGW is not affected.
if(WIN32 AND BUILD_STATIC_LIBS AND BUILD_SHARED_LIBS AND
   NOT STATIC_LIB_SUFFIX AND NOT IMPORT_LIB_SUFFIX AND
   CMAKE_STATIC_LIBRARY_SUFFIX STREQUAL CMAKE_IMPORT_LIBRARY_SUFFIX)
  set(STATIC_LIB_SUFFIX "_static")
endif()

# we want it to be called libssh2 on all platforms
if(BUILD_STATIC_LIBS)
  list(APPEND libssh2_export ${LIB_STATIC})
  add_library(${LIB_STATIC} STATIC ${SOURCES})
  target_compile_definitions(${LIB_STATIC} PRIVATE ${PRIVATE_COMPILE_DEFINITIONS} ${libssh2_DEFINITIONS})
  target_link_libraries(${LIB_STATIC} PRIVATE ${LIBRARIES})
  set_target_properties(${LIB_STATIC} PROPERTIES PREFIX "" OUTPUT_NAME "libssh2")
  set_target_properties(${LIB_STATIC} PROPERTIES SUFFIX "${STATIC_LIB_SUFFIX}${CMAKE_STATIC_LIBRARY_SUFFIX}")

  target_include_directories(${LIB_STATIC}
    PRIVATE "${PROJECT_SOURCE_DIR}/include/" ${libssh2_INCLUDE_DIRS} ${PRIVATE_INCLUDE_DIRECTORIES}
    PUBLIC
      $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
      $<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>)
endif()
if(BUILD_SHARED_LIBS)
  list(APPEND libssh2_export ${LIB_SHARED})
  add_library(${LIB_SHARED} SHARED ${SOURCES})
  if(WIN32)
    set_property(TARGET ${LIB_SHARED} APPEND PROPERTY SOURCES libssh2.rc)
  endif()
  target_compile_definitions(${LIB_SHARED} PRIVATE ${PRIVATE_COMPILE_DEFINITIONS} ${libssh2_DEFINITIONS} ${LIB_SHARED_DEFINITIONS})
  target_compile_options(${LIB_SHARED} PRIVATE ${LIB_SHARED_C_FLAGS})
  target_link_libraries(${LIB_SHARED} PRIVATE ${LIBRARIES})
  set_target_properties(${LIB_SHARED} PROPERTIES PREFIX "" IMPORT_PREFIX "" OUTPUT_NAME "libssh2")
  set_target_properties(${LIB_SHARED} PROPERTIES IMPORT_SUFFIX "${IMPORT_LIB_SUFFIX}${CMAKE_IMPORT_LIBRARY_SUFFIX}")
  set_target_properties(${LIB_SHARED} PROPERTIES POSITION_INDEPENDENT_CODE ON)

  target_include_directories(${LIB_SHARED}
    PRIVATE "${PROJECT_SOURCE_DIR}/include/" ${libssh2_INCLUDE_DIRS} ${PRIVATE_INCLUDE_DIRECTORIES}
    PUBLIC
      $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
      $<INSTALL_INTERFACE:$<INSTALL_PREFIX>/${CMAKE_INSTALL_INCLUDEDIR}>)
endif()

## Installation

install(FILES
  ${PROJECT_SOURCE_DIR}/include/libssh2.h
  ${PROJECT_SOURCE_DIR}/include/libssh2_publickey.h
  ${PROJECT_SOURCE_DIR}/include/libssh2_sftp.h
  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

if(BUILD_STATIC_LIBS)
  install(TARGETS ${LIB_STATIC}
    EXPORT Libssh2Config
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
endif()
if(BUILD_SHARED_LIBS)
  install(TARGETS ${LIB_SHARED}
    EXPORT Libssh2Config
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})

  list(APPEND _RUNTIME_DEPENDENCIES $<TARGET_FILE:${LIB_SHARED}>)
endif()

set(RUNTIME_DEPENDENCIES ${_RUNTIME_DEPENDENCIES} CACHE INTERNAL
    "Files that must be in the same directory as the executables at runtime.")

# Package config

## During package installation, install Libssh2Config.cmake
install(EXPORT Libssh2Config
  NAMESPACE Libssh2::
  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libssh2)

## During build, register directly from build tree
# create Libssh2Config.cmake
export(TARGETS ${libssh2_export} NAMESPACE Libssh2:: FILE Libssh2Config.cmake)
export(PACKAGE Libssh2) # register it

## Export a .pc file for client projects not using CMaek
if(PC_REQUIRES_PRIVATE)
  string(REPLACE ";" "," PC_REQUIRES_PRIVATE "${PC_REQUIRES_PRIVATE}")
endif()
if(PC_LIBS)
  string(REPLACE ";" " " PC_LIBS "${PC_LIBS}")
endif()
set(LIBSSH2VER ${LIBSSH2_VERSION})
set(LIBSREQUIRED ${PC_REQUIRES_PRIVATE})
set(LIBS ${PC_LIBS})
set(prefix ${CMAKE_INSTALL_PREFIX})
set(exec_prefix "\${prefix}")
set(libdir "\${prefix}/${CMAKE_INSTALL_LIBDIR}")
set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
configure_file(${CMAKE_SOURCE_DIR}/libssh2.pc.in libssh2.pc @ONLY)
install(
  FILES ${CMAKE_CURRENT_BINARY_DIR}/libssh2.pc
  DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)

## Versioning

set(LIBSSH2_SOVERSION 1)
set(LIBSSH2_VERSION 1.0.1)
if(BUILD_STATIC_LIBS)
  set_target_properties(${LIB_STATIC} PROPERTIES
    SOVERSION ${LIBSSH2_SOVERSION}
    VERSION ${LIBSSH2_VERSION})
endif()
if(BUILD_SHARED_LIBS)
  set_target_properties(${LIB_SHARED} PROPERTIES
    SOVERSION ${LIBSSH2_SOVERSION}
    VERSION ${LIBSSH2_VERSION})
endif()

include(CMakePackageConfigHelpers)
write_basic_package_version_file(
  ${CMAKE_CURRENT_BINARY_DIR}/Libssh2ConfigVersion.cmake
  VERSION "${LIBSSH2_VERSION_MAJOR}.${LIBSSH2_VERSION_MINOR}.${LIBSSH2_VERSION_PATCH}"
  COMPATIBILITY SameMajorVersion)
install(
  FILES ${CMAKE_CURRENT_BINARY_DIR}/Libssh2ConfigVersion.cmake
  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/libssh2)