#!/bin/bash
#
# Filesystem layout considerations...
# for this explanation I assume that your Subsurface sources are in
# ~/src/subsurface
#
# You need to have a version of Qt that contains the Android bits
# installed. You should be able to find the correct installer for
# Linux or Mac here:
# http://download.qt.io/official_releases/qt/
# make sure you pick one with 'android' in its name.
#
# Install this wherever you want - and then have a link named ~/src/Qt that
# points to it.
# So let's assume that you are installing the package above in ~/Qt
# (which I think is the default location), then simply do
# cd ~/src
# ln -s ~/Qt Qt
#
# you also need to have the current Android SDK and NDK installed under ~/src
#
# Or just set QT5_ANDROID, ANDROID_SDK_ROOT and ANDROID_NDK_ROOT to where ever you have them.
#
set -eu
PLATFORM=$(uname)
# (trick to get the absolute path, either if we're called with a
# absolute path or a relative path)
pushd "$(dirname "$0")/../../"
export SUBSURFACE_SOURCE=$PWD
popd

# Set build defaults
# is this a release or debug build
BUILD_TYPE=Debug
# Build-nr in the android manifest.
BUILD_NR=0
# Should we build the desktop ui or the mobile ui?
SUBSURFACE_DESKTOP=OFF
# Which arch should we build for?
ARCH=arm
# Which SDK buildtools revision is used?
ANDROID_BUILDTOOLS_REVISION=25.0.3

while [ "$#" -gt 0 ] ; do
	case "$1" in
		Release|release)
			shift
			BUILD_TYPE=Release
			;;
		Debug|debug)
			# this is the default - still need to eat the argument if given
			BUILD_TYPE=Debug
			shift
			;;
		-buildnr)
			shift
			BUILD_NR=$1
			shift
			;;
		desktop)
			SUBSURFACE_DESKTOP=ON
			shift
			;;
		arm|x86)
			ARCH=$1
			shift
		;;
	esac
done

# Its needed by all sub-cmds
export ARCH

# Configure where we can find things here
export ANDROID_NDK_ROOT=${ANDROID_NDK_ROOT-$SUBSURFACE_SOURCE/../android-ndk-r14b}

if [ -n "${QT5_ANDROID+X}" ] ; then
	echo "Using Qt5 in $QT5_ANDROID"
elif [ -d "$SUBSURFACE_SOURCE/../Qt/5.9.1" ] ; then
	export QT5_ANDROID=$SUBSURFACE_SOURCE/../Qt/5.9.1
elif [ -d "$SUBSURFACE_SOURCE/../Qt/5.9" ] ; then
	export QT5_ANDROID=$SUBSURFACE_SOURCE/../Qt/5.9
elif [ -d "$SUBSURFACE_SOURCE/../Qt/5.8" ] ; then
	export QT5_ANDROID=$SUBSURFACE_SOURCE/../Qt/5.8
elif [ -d "$SUBSURFACE_SOURCE/../Qt/5.7" ] ; then
	export QT5_ANDROID=$SUBSURFACE_SOURCE/../Qt/5.7
elif [ -d "$SUBSURFACE_SOURCE/../Qt/5.6" ] ; then
	export QT5_ANDROID=$SUBSURFACE_SOURCE/../Qt/5.6
elif [ -d "$SUBSURFACE_SOURCE/../Qt/5.5" ] ; then
	export QT5_ANDROID=$SUBSURFACE_SOURCE/../Qt/5.5
else
	echo "Cannot find Qt 5.5 or newer under $SUBSURFACE_SOURCE/../Qt"
	exit 1
fi

if [ "$PLATFORM" = "Darwin" ] ; then
	export ANDROID_SDK_ROOT=${ANDROID_SDK_ROOT-$SUBSURFACE_SOURCE/../android-sdk-macosx}
	export ANDROID_NDK_HOST=darwin-x86_64
else
	export ANDROID_SDK_ROOT=${ANDROID_SDK_ROOT-$SUBSURFACE_SOURCE/../android-sdk-linux}
	export ANDROID_NDK_HOST=linux-x86
fi

# Which versions are we building against?
SQLITE_VERSION=3190200
LIBXML2_VERSION=2.9.4
LIBXSLT_VERSION=1.1.29
LIBZIP_VERSION=1.1.3
LIBGIT2_VERSION=0.25.1
LIBUSB_VERSION=1.0.20
OPENSSL_VERSION=1.0.2l
LIBFTDI_VERSION=1.3

if [ "$ARCH" = "arm" ] ; then
	QT_ARCH=armv7
	BUILDCHAIN=arm-linux-androideabi
	OPENSSL_MACHINE=armv7
elif [ "$ARCH" = "x86" ] ; then
	QT_ARCH=$ARCH
	BUILDCHAIN=i686-linux-android
	OPENSSL_MACHINE=i686
fi
export QT5_ANDROID_BIN=${QT5_ANDROID}/android_${QT_ARCH}/bin

if [ ! -e ndk-"$ARCH" ] ; then
	"$ANDROID_NDK_ROOT/build/tools/make_standalone_toolchain.py" --arch="$ARCH" --install-dir=ndk-"$ARCH" --api=16
fi
export BUILDROOT=$PWD
export PATH=${BUILDROOT}/ndk-$ARCH/bin:$PATH
export PREFIX=${BUILDROOT}/ndk-$ARCH/sysroot/usr
export PKG_CONFIG_LIBDIR=$PREFIX/lib/pkgconfig
export CC=${BUILDROOT}/ndk-$ARCH/bin/${BUILDCHAIN}-gcc
export CXX=${BUILDROOT}/ndk-$ARCH/bin/${BUILDCHAIN}-g++
# autoconf seems to get lost without this
export SYSROOT=${BUILDROOT}/ndk-$ARCH/sysroot
export CFLAGS=--sysroot=${SYSROOT}
export CPPFLAGS=--sysroot=${SYSROOT}
export CXXFLAGS=--sysroot=${SYSROOT}
# Junk needed for qt-android-cmake
export ANDROID_STANDALONE_TOOLCHAIN=${BUILDROOT}/ndk-$ARCH
if [ "$PLATFORM" = "Darwin" ] ; then
	JAVA_HOME=$(/usr/libexec/java_home)
	export JAVA_HOME
else
	export JAVA_HOME=/usr
fi

if [ ! -e sqlite-autoconf-${SQLITE_VERSION}.tar.gz ] ; then
	wget http://www.sqlite.org/2017/sqlite-autoconf-${SQLITE_VERSION}.tar.gz
fi
if [ ! -e sqlite-autoconf-${SQLITE_VERSION} ] ; then
	tar -zxf sqlite-autoconf-${SQLITE_VERSION}.tar.gz
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/sqlite3.pc" ] ; then
	mkdir -p sqlite-build-"$ARCH"
	pushd sqlite-build-"$ARCH"
	../sqlite-autoconf-${SQLITE_VERSION}/configure --host=${BUILDCHAIN} --prefix="$PREFIX" --enable-static --disable-shared
	make
	make install
	popd
fi

if [ ! -e libxml2-${LIBXML2_VERSION}.tar.gz ] ; then
	wget ftp://xmlsoft.org/libxml2/libxml2-${LIBXML2_VERSION}.tar.gz
fi
if [ ! -e libxml2-${LIBXML2_VERSION} ] ; then
	tar -zxf libxml2-${LIBXML2_VERSION}.tar.gz
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/libxml-2.0.pc" ] ; then
	mkdir -p libxml2-build-"$ARCH"
	pushd libxml2-build-"$ARCH"
	../libxml2-${LIBXML2_VERSION}/configure --host=${BUILDCHAIN} --prefix="$PREFIX" --without-python --without-iconv --enable-static --disable-shared
	perl -pi -e 's/runtest\$\(EXEEXT\)//' Makefile
	perl -pi -e 's/testrecurse\$\(EXEEXT\)//' Makefile
	make
	make install
	popd
fi

if [ ! -e libxslt-${LIBXSLT_VERSION}.tar.gz ] ; then
	wget ftp://xmlsoft.org/libxml2/libxslt-${LIBXSLT_VERSION}.tar.gz
fi
if [ ! -e libxslt-${LIBXSLT_VERSION} ] ; then
	tar -zxf libxslt-${LIBXSLT_VERSION}.tar.gz
	# libxslt have too old config.sub for android
	cp libxml2-${LIBXML2_VERSION}/config.sub libxslt-${LIBXSLT_VERSION}
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/libxslt.pc" ] ; then
	mkdir -p libxslt-build-"$ARCH"
	pushd libxslt-build-"$ARCH"
	../libxslt-${LIBXSLT_VERSION}/configure --host=${BUILDCHAIN} --prefix="$PREFIX" --with-libxml-prefix="$PREFIX" --without-python --without-crypto --enable-static --disable-shared
	make
	make install
	popd
fi

if [ ! -e libzip-${LIBZIP_VERSION}.tar.gz ] ; then
	wget http://www.nih.at/libzip/libzip-${LIBZIP_VERSION}.tar.gz
fi
if [ ! -e libzip-${LIBZIP_VERSION} ] ; then
	tar -zxf libzip-${LIBZIP_VERSION}.tar.gz
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/libzip.pc" ] ; then
	mkdir -p libzip-build-"$ARCH"
	pushd libzip-build-"$ARCH"
	../libzip-${LIBZIP_VERSION}/configure --host=${BUILDCHAIN} --prefix="$PREFIX" --enable-static --disable-shared
	make
	make install
	popd
fi

if [ ! -e openssl-${OPENSSL_VERSION}.tar.gz ] ; then
	wget -O openssl-${OPENSSL_VERSION}.tar.gz http://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz
fi
if [ ! -e openssl-build-"$ARCH" ] ; then
	tar -zxf openssl-${OPENSSL_VERSION}.tar.gz
	mv openssl-${OPENSSL_VERSION} openssl-build-"$ARCH"
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/libssl.pc" ] ; then
	pushd openssl-build-"$ARCH"
	perl -pi -e 's/install: all install_docs install_sw/install: install_docs install_sw/g' Makefile.org
	# Use env to make all these temporary, so they don't pollute later builds.
	env SYSTEM=android \
		CROSS_COMPILE=${BUILDCHAIN}- \
		MACHINE=$OPENSSL_MACHINE \
		HOSTCC=gcc \
		CC=gcc \
		ANDROID_DEV="$PREFIX" \
		bash -x ./config shared no-ssl2 no-ssl3 no-comp no-hw no-engine --openssldir="$PREFIX"
#	sed -i.bak -e 's/soname=\$\$SHLIB\$\$SHLIB_SOVER\$\$SHLIB_SUFFIX/soname=\$\$SHLIB/g' Makefile.shared
	make depend
	make
	# now fix the reference to libcrypto.so.1.0.0 to be just to libcrypto.so
	perl -pi -e 's/libcrypto.so.1.0.0/libcrypto.so\x00\x00\x00\x00\x00\x00/' libssl.so.1.0.0
	make install_sw
	popd
fi

if [ ! -e libgit2-${LIBGIT2_VERSION}.tar.gz ] ; then
	wget -O libgit2-${LIBGIT2_VERSION}.tar.gz https://github.com/libgit2/libgit2/archive/v${LIBGIT2_VERSION}.tar.gz
fi
if [ ! -e libgit2-${LIBGIT2_VERSION} ] ; then
	tar -zxf libgit2-${LIBGIT2_VERSION}.tar.gz
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/libgit2.pc" ] ; then
	# We don't want to find the HTTP_Parser package of the build host by mistake
	perl -pi -e 's/FIND_PACKAGE\(HTTP_Parser\)/#FIND_PACKAGE(HTTP_Parser)/' libgit2-${LIBGIT2_VERSION}/CMakeLists.txt
	# also, with libgit-0.25.1 and ndk-14b we see an odd build failure with a missing rand() symbol
	# trivial workaround is to just call lrand48()
	perl -pi -e 's/seed = rand/seed = (int)lrand48/' libgit2-${LIBGIT2_VERSION}/src/cache.c
	mkdir -p libgit2-build-"$ARCH"
	pushd libgit2-build-"$ARCH"
	cmake -DCMAKE_SYSTEM_NAME=Android -DSHA1_TYPE=builtin \
		-DBUILD_CLAR=OFF -DBUILD_SHARED_LIBS=OFF \
		-DCMAKE_INSTALL_PREFIX="$PREFIX" \
		-DCURL=OFF \
		-DUSE_SSH=OFF \
		-DOPENSSL_SSL_LIBRARY="$PREFIX"/lib/libssl.so \
		-DOPENSSL_CRYPTO_LIBRARY="$PREFIX"/lib/libcrypto.so \
		-DOPENSSL_INCLUDE_DIR="$PREFIX"/include/openssl \
		-D_OPENSSL_VERSION=${OPENSSL_VERSION} \
		../libgit2-${LIBGIT2_VERSION}/
	make
	make install
	# Patch away pkg-config dependency to zlib, its there, i promise
	perl -pi -e 's/^(Requires.private:.*)zlib(.*)$/$1 $2/' "$PKG_CONFIG_LIBDIR"/libgit2.pc
	popd
fi

if [ ! -e libusb-${LIBUSB_VERSION}.tar.gz ] ; then
	wget -O libusb-${LIBUSB_VERSION}.tar.gz https://github.com/libusb/libusb/archive/v${LIBUSB_VERSION}.tar.gz
fi
if [ ! -e libusb-${LIBUSB_VERSION} ] ; then
	tar -zxf libusb-${LIBUSB_VERSION}.tar.gz
fi
if ! grep -q libusb_set_android_open_callback libusb-${LIBUSB_VERSION}/libusb/libusb.h ; then
	# Patch in our libusb callback
	pushd libusb-${LIBUSB_VERSION}
	patch -p1 < "$SUBSURFACE_SOURCE"/packaging/android/patches/libusb-android.patch
	popd
fi
if [ ! -e libusb-${LIBUSB_VERSION}/configure ] ; then
	pushd libusb-${LIBUSB_VERSION}
	mkdir m4
	autoreconf -i
	popd
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/libusb-1.0.pc" ] ; then
	mkdir -p libusb-build-"$ARCH"
	pushd libusb-build-"$ARCH"
	../libusb-${LIBUSB_VERSION}/configure --host=${BUILDCHAIN} --prefix="$PREFIX" --enable-static --disable-shared --disable-udev --enable-system-log
	# --enable-debug-log
	make
	make install
	popd
fi

if [ ! -e libftdi1-${LIBFTDI_VERSION}.tar.bz2 ] ; then
	wget -O libftdi1-${LIBFTDI_VERSION}.tar.bz2 http://www.intra2net.com/en/developer/libftdi/download/libftdi1-${LIBFTDI_VERSION}.tar.bz2
fi
if [ ! -e libftdi1-${LIBFTDI_VERSION} ] ; then
	tar -jxf libftdi1-${LIBFTDI_VERSION}.tar.bz2
fi
if [ ! -e "$PKG_CONFIG_LIBDIR/libftdi1.pc" ] && [ "$PLATFORM" != "Darwin" ] ; then
	mkdir -p libftdi1-build-"$ARCH"
	pushd libftdi1-build-"$ARCH"
	cmake ../libftdi1-${LIBFTDI_VERSION} -DCMAKE_C_COMPILER="$CC" -DCMAKE_INSTALL_PREFIX="$PREFIX" -DCMAKE_PREFIX_PATH="$PREFIX" -DSTATICLIBS=ON -DPYTHON_BINDINGS=OFF -DDOCUMENTATION=OFF -DFTDIPP=OFF -DBUILD_TESTS=OFF -DEXAMPLES=OFF -DFTDI_EEPROM=OFF
	make
	make install
	popd
fi
# Blast away the shared version to force static linking
if [ -e "$PREFIX/lib/libftdi1.so" ] ; then
	rm "$PREFIX"/lib/libftdi1.so*
fi

if [ ! -e "$PKG_CONFIG_LIBDIR/libdivecomputer.pc" ] ; then
	mkdir -p libdivecomputer-build-"$ARCH"
	pushd libdivecomputer-build-"$ARCH"
	"$SUBSURFACE_SOURCE"/../libdivecomputer/configure --host=${BUILDCHAIN} --prefix="$PREFIX" --enable-static --disable-shared --enable-examples=no
	make
	make install
	popd
fi

if [ ! -e qt-android-cmake ] ; then
	git clone https://github.com/LaurentGomila/qt-android-cmake.git
else
	pushd qt-android-cmake
	git pull
	popd
fi

# Should we build the mobile ui or the desktop ui?
# doing this backwards in order not to break people's setup
if [ "$SUBSURFACE_DESKTOP" = "ON" ] ; then
	SUBSURFACE_MOBILE=
else
	SUBSURFACE_MOBILE=ON
fi

if [ "$SUBSURFACE_MOBILE" = "ON" ] ; then
	pushd "$SUBSURFACE_SOURCE"
	bash ./scripts/mobilecomponents.sh
	popd
fi

if [ ! -z "$SUBSURFACE_MOBILE" ] ; then
	mkdir -p subsurface-mobile-build-"$ARCH"
	cd subsurface-mobile-build-"$ARCH"
	MOBILE_CMAKE=-DSUBSURFACE_TARGET_EXECUTABLE=MobileExecutable
	BUILD_NAME=Subsurface-mobile
else
	MOBILE_CMAKE=""
	mkdir -p subsurface-build-"$ARCH"
	cd subsurface-build-"$ARCH"
	BUILD_NAME=Subsurface
fi

if [ "$PLATFORM" = "Darwin" ] ; then
	FTDI=OFF
else
	FTDI=ON
fi

PKGCONF=$(which pkg-config)
cmake $MOBILE_CMAKE \
	-DPKG_CONFIG_EXECUTABLE="$PKGCONF" \
	-DQT_ANDROID_SDK_ROOT="$ANDROID_SDK_ROOT" \
	-DQT_ANDROID_NDK_ROOT="$ANDROID_NDK_ROOT" \
	-DCMAKE_TOOLCHAIN_FILE="$BUILDROOT"/qt-android-cmake/toolchain/android.toolchain.cmake \
	-DQT_ANDROID_CMAKE="$BUILDROOT"/qt-android-cmake/AddQtAndroidApk.cmake \
	-DFORCE_LIBSSH=OFF \
	-DLIBDC_FROM_PKGCONFIG=ON \
	-DLIBGIT2_FROM_PKGCONFIG=ON \
	-DNO_MARBLE=ON \
	-DNO_PRINTING=ON \
	-DNO_USERMANUAL=ON \
	-DFBSUPPORT=OFF \
	-DCMAKE_PREFIX_PATH:UNINITIALIZED="$QT5_ANDROID/android_$QT_ARCH/lib/cmake" \
	-DCMAKE_BUILD_TYPE="$BUILD_TYPE" \
	-DMAKE_TESTS=OFF \
	-DFTDISUPPORT=${FTDI} \
	-DANDROID_NATIVE_LIBSSL="$BUILDROOT/ndk-$ARCH/sysroot/usr/lib/libssl.so" \
	-DANDROID_NATIVE_LIBCRYPT="$BUILDROOT/ndk-$ARCH/sysroot/usr/lib/libcrypto.so" \
	-DBUILDTOOLS_REVISION="$ANDROID_BUILDTOOLS_REVISION" \
	"$SUBSURFACE_SOURCE"

# set up the version number

rm -f ssrf-version.h
make version

if [ ! -z "$SUBSURFACE_MOBILE" ] ; then
	SUBSURFACE_MOBILE_VERSION=$(grep MOBILE_VERSION_STRING ssrf-version.h | awk '{ print $3 }' | tr -d \" )
	SUBSURFACE_MOBILE_VERSION="$SUBSURFACE_MOBILE_VERSION ($(grep CANONICAL_VERSION_STRING ssrf-version.h | awk '{ print $3 }' | tr -d \"))"

	rm -rf android-mobile
	cp -a "$SUBSURFACE_SOURCE/android-mobile" .
	sed -i -e "s/@SUBSURFACE_MOBILE_VERSION@/$SUBSURFACE_MOBILE_VERSION/;s/@BUILD_NR@/$BUILD_NR/" android-mobile/AndroidManifest.xml
else
	SUBSURFACE_VERSION=$(grep CANONICAL_VERSION_STRING ssrf-version.h | awk '{ print $3 }' | tr -d \")

	# android-mobile is hardcoded in CMakeLists.txt nowadays.
	rm -rf android-mobile
	cp -a "$SUBSURFACE_SOURCE/android" android-mobile
	sed -i -e "s/@SUBSURFACE_VERSION@/\"$SUBSURFACE_VERSION\"/;s/@BUILD_NR@/$BUILD_NR/" android-mobile/AndroidManifest.xml
fi

# now make the translations
make translations
mkdir -p assets/translations
cp -a translations/*.qm assets/translations

# now build Subsurface and use the rest of the command line arguments
make "$@"

echo "Done building $BUILD_NAME for Android"