#!/usr/bin/env bash

# Configure the following variables according to your needs

NDK_VERSION="21.1.6352462"
OPENSSL_TAG_VERSION="OpenSSL_1_1_1g "
CURL_TAG_VERSION="curl-7_78_0"
JSONC_TAG_VERSION="master"
ANDROID_ARCHS="arm arm64 x86 x86_64"
NDK=$HOME/Android/Sdk/ndk/$NDK_VERSION
MIN_SDK_VERSION=23 # Can't go any lower unfortunately. See the cURL docs for more info.
TARGET_SDK_VERSION=29

# Edit below at your own risk

get_abi() {
    case $1 in
        "arm")
            echo -n "armeabi-v7a"
            ;;
        "arm64")
            echo -n "arm64-v8a"
            ;;
        "x86")
            echo -n "x86"
            ;;
        "x86_64")
            echo -n "x86_64"
            ;;
    esac
}

make_openssl() {
    test -d openssl || git clone --branch $OPENSSL_TAG_VERSION https://github.com/openssl/openssl.git
    for ARCH in $ANDROID_ARCHS; do
        (
        export PREFIX="$BUILD_DIR/android/$ARCH"
        mkdir -p "$PREFIX"
        cd openssl
        git checkout $OPENSSL_TAG_VERSION
        make clean
        export ANDROID_NDK_HOME=$NDK
        export ANDROID_NDK_ROOT=$NDK
        export PATH=$ANDROID_NDK_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin:$ANDROID_NDK_HOME/toolchains/arm-linux-androideabi-4.9/prebuilt/linux-x86_64/bin:$PATH
        ./Configure \
            --prefix="$PREFIX" \
            -D__ANDROID_API__=$TARGET_SDK_VERSION \
            no-shared \
            android-$ARCH
        make -j24 install_dev
        )
    done
}

make_curl() {
    test -d curl || git clone --branch $CURL_TAG_VERSION https://github.com/curl/curl.git
    for ARCH in $ANDROID_ARCHS; do
        (
        export PREFIX="$BUILD_DIR/android/$ARCH"
        mkdir -p "$PREFIX"
        cd curl
        git checkout $CURL_TAG_VERSION
        test -f configure || autoreconf -fi
        export HOST_TAG=linux-x86_64
        export TOOLCHAIN=$NDK/toolchains/llvm/prebuilt/$HOST_TAG
        case $ARCH in
            "arm")
                export CURL_ARCH="arm-linux-androideabi"
                export CLANG="armv7a-linux-androideabi"
                ;;
            "arm64")
                export CURL_ARCH="aarch64-linux-android"
                export CLANG=$CURL_ARCH
                ;;
            "x86")
                export CURL_ARCH="i686-linux-android"
                export CLANG=$CURL_ARCH
                ;;
            "x86_64")
                export CURL_ARCH="x86_64-linux-android"
                export CLANG=$CURL_ARCH
                ;;
        esac
        export     AR=$TOOLCHAIN/bin/$CURL_ARCH-ar
        export     AS=$TOOLCHAIN/bin/$CURL_ARCH-as
        export     CC=$TOOLCHAIN/bin/${CLANG}${MIN_SDK_VERSION}-clang
        export    CXX=$TOOLCHAIN/bin/${CLANG}${MIN_SDK_VERSION}-clang++
        export     LD=$TOOLCHAIN/bin/$CURL_ARCH-ld
        export RANLIB=$TOOLCHAIN/bin/$CURL_ARCH-ranlib
        export  STRIP=$TOOLCHAIN/bin/$CURL_ARCH-strip
        make clean
        ./configure --prefix="$PREFIX" \
            --host $CURL_ARCH \
            --with-pic \
            --disable-shared \
            --with-ssl="$PREFIX"
        make -j24 install
        )
    done
}

make_jsonc() {
    test -d json-c || git clone --branch $JSONC_TAG_VERSION https://github.com/json-c/json-c.git
    for ARCH in $ANDROID_ARCHS; do
        (
        export PREFIX="$BUILD_DIR/android/$ARCH"
        mkdir -p "$PREFIX"
        cd json-c
        git checkout $JSONC_TAG_VERSION
        test -d $ARCH && rm -rf $ARCH
        mkdir $ARCH
        pushd $ARCH
        export ABI="$(get_abi $ARCH)"
        cmake \
            -DCMAKE_TOOLCHAIN_FILE=$NDK/build/cmake/android.toolchain.cmake \
            -DANDROID_ABI=$ABI \
            -DANDROID_NATIVE_API_LEVEL=$MIN_SDK_VERSION \
            -DCMAKE_INSTALL_PREFIX=$PREFIX \
            -DBUILD_SHARED_LIBS=OFF \
            -DBUILD_STATIC_LIBS=ON \
            ..
            make -j24
            make install
        )
    done
}

make_pihelper() {
    for ARCH in $ANDROID_ARCHS; do
        (
        export PREFIX="$BUILD_DIR/android/$ARCH"
        mkdir -p "$PREFIX"
        cd "$BUILD_DIR"
        test -d $ARCH && rm -rf $ARCH
        mkdir $ARCH
        pushd $ARCH
        cmake \
            -DCMAKE_FIND_ROOT_PATH=$PREFIX \
            -DCMAKE_INCLUDE_PATH=$PREFIX/include \
            -DCMAKE_PREFIX_PATH=$PREFIX \
            -DCMAKE_TOOLCHAIN_FILE=$NDK/build/cmake/android.toolchain.cmake \
            -DANDROID_ABI=$ABI \
            -DANDROID_NATIVE_API_LEVEL=$MIN_SDK_VERSION \
            -DCMAKE_INSTALL_PREFIX=$PREFIX \
            -DPIHELPER_SHARED=OFF \
            -DPIHELPER_STATIC=ON \
            -DPIHELPER_DEV=ON \
            ../..
            make -j24
            make install
        )
    done
}

package() {
    for ARCH in $ANDROID_ARCHS; do
        (
        export ABI="$(get_abi $ARCH)"
        cd $BUILD_DIR/android
        cp -r $ARCH/include .
        mv $ARCH/lib/*.a $ARCH/lib/*.la $ARCH/
        rm -rf $ARCH/{bin,lib,include,share}
        if [ "$ARCH" != "$ABI" ]; then
            mv $ARCH $ABI
        fi
        )
    done
}

(
if [ "$(dirname $0)" == "." ]; then
    cd ..
fi
test -d deps || mkdir deps
export BUILD_DIR="$PWD/build"
test -d "$BUILD_DIR" || mkdir -p "$BUILD_DIR"
cd deps
make_openssl
make_curl
make_jsonc
make_pihelper
package
)