#!/bin/sh

while getopts n:o:a:t:d:h: option
do
 case "${option}"
 in
 n) ANDROID_NDK=${OPTARG};;
 o) OPENSSL_VERSION=${OPTARG};;
 a) API_LEVEL=${OPTARG};;
 t) BUILD_TARGETS=${OPTARG};;
 d) OUT_DIR=${OPTARG};;
 h) HOST_TAG=${OPTARG};;
 *) twentytwo=${OPTARG};;
 esac
done


BUILD_DIR=/tmp/openssl_android_build

if [ ! -d openssl-${OPENSSL_VERSION} ]
then
    if [ ! -f openssl-${OPENSSL_VERSION}.tar.gz ]
    then
        wget https://www.openssl.org/source/openssl-${OPENSSL_VERSION}.tar.gz || exit 128
    fi
    tar xzf openssl-${OPENSSL_VERSION}.tar.gz || exit 128
fi

cd openssl-${OPENSSL_VERSION} || exit 128


##### export ndk directory. Required by openssl-build-scripts #####
case ${OPENSSL_VERSION} in
    1.1.1*)
        export ANDROID_NDK_HOME=$ANDROID_NDK
    ;;
    *)
        export ANDROID_NDK_ROOT=$ANDROID_NDK
    ;;
esac

export PATH=$ANDROID_NDK/toolchains/llvm/prebuilt/$HOST_TAG/bin:$PATH

##### build-function #####
build_the_thing() {
    make clean
    ./Configure $SSL_TARGET -D__ANDROID_API__=$API_LEVEL && \
    make SHLIB_EXT=.so && \
    make install SHLIB_EXT=.so DESTDIR=$DESTDIR || exit 128
}

##### set variables according to build-tagret #####
for build_target in $BUILD_TARGETS
do
    case $build_target in
    armeabi-v7a)
        DESTDIR="$BUILD_DIR/armeabi-v7a"
        SSL_TARGET="android-arm"
    ;;
    x86)
        DESTDIR="$BUILD_DIR/x86"
        SSL_TARGET="android-x86"
    ;;
    x86_64)
        DESTDIR="$BUILD_DIR/x86_64"
        SSL_TARGET="android-x86_64"
    ;;
    arm64-v8a)
        DESTDIR="$BUILD_DIR/arm64-v8a"
        SSL_TARGET="android-arm64"
    ;;
    esac

    rm -rf $DESTDIR
    build_the_thing
#### copy libraries and includes to output-directory #####
    mkdir -p $OUT_DIR/$build_target/include
    cp -R $DESTDIR/usr/local/include/* $OUT_DIR/$build_target/include
    cp -R $DESTDIR/usr/local/ssl/* $OUT_DIR/$build_target/
    mkdir -p $OUT_DIR/$build_target/lib
    cp -R $DESTDIR/usr/local/lib/*.so $OUT_DIR/$build_target/lib
    cp -R $DESTDIR/usr/local/lib/*.a $OUT_DIR/$build_target/lib
done

echo Success