import feature : feature ;

project libdatachannel ;
path-constant CWD : . ;

feature gnutls : off on : composite propagated ;
feature.compose <gnutls>off
    : <define>USE_GNUTLS=0 ;
feature.compose <gnutls>on
    : <define>USE_GNUTLS=1 ;

lib libdatachannel
	: # sources
	[ glob ./src/*.cpp ]
	: # requirements
	<cxxstd>17
	<include>./include/rtc
	<define>RTC_ENABLE_MEDIA=0
	<define>RTC_ENABLE_WEBSOCKET=0
	<define>USE_NICE=0
	<toolset>msvc:<define>WIN32_LEAN_AND_MEAN
	<toolset>msvc:<define>NOMINMAX
	<toolset>msvc:<define>_CRT_SECURE_NO_WARNINGS
	<toolset>msvc:<define>_SILENCE_CXX17_CODECVT_HEADER_DEPRECATION_WARNING
	<library>/libdatachannel//usrsctp
	<library>/libdatachannel//juice
	<library>/libdatachannel//plog
	<gnutls>on:<library>gnutls/<link>shared
	<gnutls>off:<library>ssl
	<gnutls>off:<library>crypto
	: # default build
	<link>static
	: # usage requirements
	<include>./include
	<define>RTC_ENABLE_MEDIA=0
	<define>RTC_ENABLE_WEBSOCKET=0
	<library>/libdatachannel//plog
	<toolset>gcc:<cxxflags>"-pthread -Wno-pedantic -Wno-unused-parameter -Wno-unused-variable"
	<toolset>clang:<cxxflags>"-pthread -Wno-pedantic -Wno-unused-parameter -Wno-unused-variable"
	;

alias plog
    : # no sources
    : # no build requirements
    : # no default build
    : # usage requirements
    <include>./deps/plog/include
    ;

alias usrsctp
    : # no sources
    : # no build requirements
    : # no default build
    : # usage requirements
    <include>./deps/usrsctp/usrsctplib
    <library>libusrsctp.a
    ;

alias usrsctp
    : # no sources
    : <toolset>msvc
    : # no default build
    : # usage requirements
    <include>./deps/usrsctp/usrsctplib
    <library>usrsctp.lib
    ;

alias juice
    : # no sources
    : # no build requirements
    : # no default build
    : # usage requirements
    <include>./deps/libjuice/include
    <gnutls>on:<library>libjuice-gnutls.a
    <gnutls>on:<library>nettle/<link>shared
    <gnutls>off:<library>libjuice-openssl.a
    ;

alias juice
    : # no sources
    : <toolset>msvc
    : # no default build
    : # usage requirements
    <include>./deps/libjuice/include
    <library>juice-static.lib
    ;

make libusrsctp.a : : @make_libusrsctp ;
make usrsctp.lib : : @make_libusrsctp_msvc ;

rule make_libusrsctp ( targets * : sources * : properties * )
{
	local VARIANT = [ feature.get-values <variant> : $(properties) ] ;
	VARIANT on $(targets) = $(VARIANT) ;
	BUILD_DIR on $(targets) = "build-$(VARIANT)" ;
}
actions make_libusrsctp
{
    (cd $(CWD)/deps/usrsctp && mkdir -p $(BUILD_DIR) && cd $(BUILD_DIR) && cmake -DCMAKE_BUILD_TYPE=$(VARIANT) -DCMAKE_C_FLAGS="-fPIC -Wno-unknown-warning-option -Wno-format-truncation" -Dsctp_build_shared_lib=0 -Dsctp_build_programs=0 .. && make -j2 usrsctp)
    cp $(CWD)/deps/usrsctp/$(BUILD_DIR)/usrsctplib/libusrsctp.a $(<)
}
rule make_libusrsctp_msvc ( targets * : sources * : properties * )
{
	local VARIANT = [ feature.get-values <variant> : $(properties) ] ;
	VARIANT on $(targets) = $(VARIANT) ;
	BUILD_DIR on $(targets) = "build-$(VARIANT)" ;
}
actions make_libusrsctp_msvc
{
	SET OLDD=%CD%
    cd $(CWD)/deps/usrsctp
    mkdir $(BUILD_DIR)
    cd $(BUILD_DIR)
    cmake -G "Visual Studio 16 2019" -Dsctp_build_shared_lib=0 -Dsctp_build_programs=0 ..
    msbuild usrsctplib.sln /property:Configuration=$(VARIANT)
    cd %OLDD%
    cp $(CWD)/deps/usrsctp/$(BUILD_DIR)/usrsctplib/Release/usrsctp.lib $(<)
}

make libjuice-gnutls.a : : @make_libjuice_gnutls ;
make libjuice-openssl.a : : @make_libjuice_openssl ;
make juice-static.lib : : @make_libjuice_msvc ;

rule make_libjuice_gnutls ( targets * : sources * : properties * )
{
	local VARIANT = [ feature.get-values <variant> : $(properties) ] ;
	BUILD_DIR on $(targets) = "build-gnutls-$(VARIANT)" ;
	CMAKEOPTS on $(targets) = "-DCMAKE_C_FLAGS=\"-fPIC\" -DCMAKE_BUILD_TYPE=$(VARIANT) -DUSE_NETTLE=1" ;
}
actions make_libjuice_gnutls
{
    (cd $(CWD)/deps/libjuice && mkdir -p $(BUILD_DIR) && cd $(BUILD_DIR) && cmake $(CMAKEOPTS) .. && make -j2 juice-static)
    cp $(CWD)/deps/libjuice/$(BUILD_DIR)/libjuice-static.a $(<)
}
rule make_libjuice_openssl ( targets * : sources * : properties * )
{
	local VARIANT = [ feature.get-values <variant> : $(properties) ] ;
	BUILD_DIR on $(targets) = "build-openssl-$(VARIANT)" ;
	CMAKEOPTS on $(targets) = "-DCMAKE_C_FLAGS=\"-fPIC\" -DCMAKE_BUILD_TYPE=$(VARIANT) -DUSE_NETTLE=0" ;

	local OPENSSL_INCLUDE = [ feature.get-values <openssl-include> : $(properties) ] ;
	if <target-os>darwin in $(properties) && $(OPENSSL_INCLUDE) = ""
	{
		# on macOS, default to pick up openssl from the homebrew installation
		# brew install openssl
		OPENSSL_INCLUDE = /usr/local/opt/openssl/include ;
	}

	if $(OPENSSL_INCLUDE) != ""
	{ CMAKEOPTS on $(targets) += " -DOPENSSL_ROOT_DIR=$(OPENSSL_INCLUDE)/.." ; }
}
actions make_libjuice_openssl
{
    (cd $(CWD)/deps/libjuice && mkdir -p $(BUILD_DIR) && cd $(BUILD_DIR) && cmake $(CMAKEOPTS) .. && make -j2 juice-static)
    cp $(CWD)/deps/libjuice/$(BUILD_DIR)/libjuice-static.a $(<)
}
rule make_libjuice_msvc ( targets * : sources * : properties * )
{
	local VARIANT = [ feature.get-values <variant> : $(properties) ] ;
	VARIANT on $(targets) = $(VARIANT) ;
	if <gnutls>on in $(properties)
	{
		BUILD_DIR on $(targets) += "build-gnutls-$(VARIANT)" ;
		CMAKEOPTS on $(targets) = "-DUSE_NETTLE=1" ;
	}
	else
	{
		BUILD_DIR on $(targets) += "build-openssl-$(VARIANT)" ;
		CMAKEOPTS on $(targets) = "-DUSE_NETTLE=0" ;
	}
}
actions make_libjuice_msvc
{
	SET OLDD=%CD%
    cd $(CWD)/deps/libjuice
    mkdir $(BUILD_DIR)
    cd $(BUILD_DIR)
    cmake -G "Visual Studio 16 2019" $(CMAKEOPTS) ..
    msbuild libjuice.sln /property:Configuration=$(VARIANT)
    cd %OLDD%
    cp $(CWD)/deps/libjuice/$(BUILD_DIR)/Release/juice-static.lib $(<)
}

# the search path to pick up the openssl libraries from. This is the <search>
# property of those libraries
rule openssl-lib-path ( properties * )
{
    local OPENSSL_LIB = [ feature.get-values <openssl-lib> : $(properties) ] ;

    if <target-os>darwin in $(properties) && $(OPENSSL_LIB) = ""
    {
        # on macOS, default to pick up openssl from the homebrew installation
        # brew install openssl
        OPENSSL_LIB = /usr/local/opt/openssl/lib ;
    }
    else if <target-os>windows in $(properties) && $(OPENSSL_LIB) = ""
    {
        # on windows, assume openssl is installed to c:\OpenSSL-Win32
        if <address-model>64 in $(properties)
        { OPENSSL_LIB = c:\\OpenSSL-Win64\\lib ; }
        else
        { OPENSSL_LIB = c:\\OpenSSL-Win32\\lib ; }
    }

    local result ;
    result += <search>$(OPENSSL_LIB) ;
    return $(result) ;
}

# the include path to pick up openssl headers from. This is the
# usage-requirement for the openssl-related libraries
rule openssl-include-path ( properties * )
{
    local OPENSSL_INCLUDE = [ feature.get-values <openssl-include> : $(properties) ] ;

    if <target-os>darwin in $(properties) && $(OPENSSL_INCLUDE) = ""
    {
        # on macOS, default to pick up openssl from the homebrew installation
        # brew install openssl
        OPENSSL_INCLUDE = /usr/local/opt/openssl/include ;
    }
    else if <target-os>windows in $(properties) && $(OPENSSL_INCLUDE) = ""
    {
        # on windows, assume openssl is installed to c:\OpenSSL-Win32
        if <address-model>64 in $(properties)
        { OPENSSL_INCLUDE = c:\\OpenSSL-Win64\\include ; }
        else
        { OPENSSL_INCLUDE = c:\\OpenSSL-Win32\\include ; }
    }

    local result ;
    result += <include>$(OPENSSL_INCLUDE) ;
    return $(result) ;
}

# libraries for OpenSSL on Windows
lib advapi32 : : <name>advapi32 ;
lib user32 : : <name>user32 ;
lib shell32 : : <name>shell32 ;
lib gdi32 : : <name>gdi32 ;
lib bcrypt : : <name>bcrypt ;
lib z : : <link>shared <name>z ;
alias ssl-deps : advapi32 user32 shell32 gdi32 ;

# OpenSSL on Windows
lib crypto : ssl-deps : <toolset>msvc <openssl-version>1.1 <name>libcrypto
    <conditional>@openssl-lib-path : : <conditional>@openssl-include-path ;
lib ssl : ssl-deps : <toolset>msvc <openssl-version>1.1 <name>libssl <use>crypto
    <conditional>@openssl-lib-path : : <conditional>@openssl-include-path ;

# OpenSSL on other platforms
lib crypto : : <name>crypto <use>z <conditional>@openssl-lib-path : :
    <conditional>@openssl-include-path ;
lib ssl : : <name>ssl <use>crypto <conditional>@openssl-lib-path : :
    <conditional>@openssl-include-path ;

# GnuTLS
lib gnutls : : <link>shared <name>gnutls ;
lib nettle : : <link>shared <name>nettle ;

