set(OPENSSL_SOURCE_DIR ${CMAKE_SOURCE_DIR}/external/openssl)

if(WITH_SYSTEM_DEPENDENCIES)
    find_package(OpenSSL REQUIRED)
    set(OPENSSL_STATIC_LIBRARIES ${OPENSSL_LIBRARIES})
    set(OPENSSL_SHARED_LIBRARIES ${OPENSSL_LIBRARIES})
else()
    set(OPENSSL_STATIC_LIBRARIES ssl-static crypto-static)
    set(OPENSSL_SHARED_LIBRARIES ssl-shared crypto-shared)

    if(NOT MSVC)
        ExternalProject_Add(openssl-project
            SOURCE_DIR ${OPENSSL_SOURCE_DIR}
            INSTALL_DIR ${CMAKE_INSTALL_PREFIX}
            UPDATE_COMMAND ""
            CONFIGURE_COMMAND ./config no-tests --prefix=<INSTALL_DIR> --openssldir=<INSTALL_DIR>/ssl
            BUILD_COMMAND make
            INSTALL_COMMAND make install_sw
            BUILD_IN_SOURCE ON
        )
        ExternalProject_Get_Property(openssl-project INSTALL_DIR)
    
        set(ssl_static_LIBRARY ${CMAKE_STATIC_LIBRARY_PREFIX}ssl${CMAKE_STATIC_LIBRARY_SUFFIX})
        set(ssl_shared_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}ssl${CMAKE_SHARED_LIBRARY_SUFFIX})
        set(crypto_static_LIBRARY ${CMAKE_STATIC_LIBRARY_PREFIX}crypto${CMAKE_STATIC_LIBRARY_SUFFIX})
        set(crypto_shared_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}crypto${CMAKE_SHARED_LIBRARY_SUFFIX})
    
        set(ssl_static_LIBRARY ${INSTALL_DIR}/lib/${ssl_static_LIBRARY})
        set(ssl_shared_LIBRARY ${INSTALL_DIR}/lib/${ssl_shared_LIBRARY})
        set(crypto_static_LIBRARY ${INSTALL_DIR}/lib/${crypto_static_LIBRARY})
        set(crypto_shared_LIBRARY ${INSTALL_DIR}/lib/${crypto_shared_LIBRARY})
    else()
        include(cmake/FindPerl.cmake)
        message(STATUS "PERL_EXECUTABLE: ${PERL_EXECUTABLE}")
        message(STATUS "PERL_VERSION_STRING: ${PERL_VERSION_STRING}")
        ExternalProject_Add(openssl-project
            SOURCE_DIR ${CMAKE_SOURCE_DIR}/external/openssl
            INSTALL_DIR ${CMAKE_INSTALL_PREFIX}
            UPDATE_COMMAND ""
            CONFIGURE_COMMAND ${PERL_EXECUTABLE} ./Configure VC-WIN64A no-asm no-tests --prefix=<INSTALL_DIR> --openssldir=<INSTALL_DIR>/ssl
            BUILD_COMMAND nmake
            INSTALL_COMMAND nmake install_sw
            BUILD_IN_SOURCE ON
        )
        ExternalProject_Get_Property(openssl-project INSTALL_DIR)
    
        set(ssl_static_LIBRARY ${CMAKE_STATIC_LIBRARY_PREFIX}libssl${CMAKE_STATIC_LIBRARY_SUFFIX})
        set(ssl_shared_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}libssl${CMAKE_SHARED_LIBRARY_SUFFIX})
        set(crypto_static_LIBRARY ${CMAKE_STATIC_LIBRARY_PREFIX}libcrypto${CMAKE_STATIC_LIBRARY_SUFFIX})
        set(crypto_shared_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}libcrypto${CMAKE_SHARED_LIBRARY_SUFFIX})
    
        set(ssl_static_LIBRARY ${INSTALL_DIR}/lib/${ssl_static_LIBRARY})
        set(ssl_shared_LIBRARY ${INSTALL_DIR}/lib/${ssl_shared_LIBRARY})
        set(crypto_static_LIBRARY ${INSTALL_DIR}/lib/${crypto_static_LIBRARY})
        set(crypto_shared_LIBRARY ${INSTALL_DIR}/lib/${crypto_shared_LIBRARY})
    endif()
    
    set(openssl_INCLUDE_DIR ${INSTALL_DIR}/include)
    FILE(MAKE_DIRECTORY ${INSTALL_DIR}/include)
    
    # ssl-static
    add_library(ssl-static STATIC IMPORTED)
    set_property(TARGET ssl-static PROPERTY IMPORTED_LOCATION ${ssl_static_LIBRARY})
    set_property(TARGET ssl-static PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${openssl_INCLUDE_DIR})
    add_dependencies(ssl-static openssl-project)
    
    # ssl-shared
    add_library(ssl-shared STATIC IMPORTED)
    set_property(TARGET ssl-shared PROPERTY IMPORTED_LOCATION ${ssl_shared_LIBRARY})
    set_property(TARGET ssl-shared PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${openssl_INCLUDE_DIR})
    add_dependencies(ssl-shared openssl-project)
    
    # crypto-static
    add_library(crypto-static STATIC IMPORTED)
    set_property(TARGET crypto-static PROPERTY IMPORTED_LOCATION ${crypto_static_LIBRARY})
    set_property(TARGET crypto-static PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${openssl_INCLUDE_DIR})
    add_dependencies(crypto-static opencrypto-project)
    
    # crypto-shared
    add_library(crypto-shared STATIC IMPORTED)
    set_property(TARGET crypto-shared PROPERTY IMPORTED_LOCATION ${crypto_shared_LIBRARY})
    set_property(TARGET crypto-shared PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${openssl_INCLUDE_DIR})
    add_dependencies(crypto-shared openssl-project)
endif()