#! /usr/bin/env bash
(cd external/openssl;

    if [ ! ${ANDROID_NDK_ROOT} ]; then
        echo "ANDROID_NDK_ROOT environment variable not set, set and rerun"
        exit 1
    fi

    ANDROID_LIB_ROOT=../android-libs
    ANDROID_TOOLCHAIN_DIR=/tmp/sqlcipher-android-toolchain
    OPENSSL_CONFIGURE_OPTIONS="no-krb5 no-idea no-camellia \
        no-seed no-bf no-cast no-rc2 no-rc4 no-rc5 no-md2 \
        no-md4 no-ripemd no-rsa no-ecdh no-sock no-ssl2 no-ssl3 \
        no-dsa no-dh no-ec no-ecdsa no-tls1 no-pbe no-pkcs \
        no-tlsext no-pem no-rfc3779 no-whirlpool no-ui no-srp \
        no-ssltrace no-tlsext no-mdc2 no-ecdh no-engine \
        no-tls2 no-srtp -fPIC"
    
    HOST_INFO=`uname -a`
    case ${HOST_INFO} in
        Darwin*)
            TOOLCHAIN_SYSTEM=darwin-x86
            ;;
        Linux*)
            if [[ "${HOST_INFO}" == *i686* ]]
            then
                TOOLCHAIN_SYSTEM=linux-x86
            else
                TOOLCHAIN_SYSTEM=linux-x86_64
            fi
            ;;
        *)
            echo "Toolchain unknown for host system"
            exit 1
            ;;
    esac

    rm -rf ${ANDROID_LIB_ROOT}
    git clean -dfx && git checkout -f
    ./Configure dist
    
    for SQLCIPHER_TARGET_PLATFORM in armeabi armeabi-v7a x86 x86_64 arm64-v8a
    do
        echo "Building for libcrypto.a for ${SQLCIPHER_TARGET_PLATFORM}"
        case "${SQLCIPHER_TARGET_PLATFORM}" in
            armeabi)
                TOOLCHAIN_ARCH=arm
                TOOLCHAIN_PREFIX=arm-linux-androideabi
                CONFIGURE_ARCH=android
                PLATFORM_OUTPUT_DIR=armeabi
                ANDROID_PLATFORM_VERSION=android-9
                ;;
            armeabi-v7a)
                TOOLCHAIN_ARCH=arm
                TOOLCHAIN_PREFIX=arm-linux-androideabi
                CONFIGURE_ARCH=android -march=armv7-a
                PLATFORM_OUTPUT_DIR=armeabi-v7a
                ANDROID_PLATFORM_VERSION=android-9
                ;;
            x86)
                TOOLCHAIN_ARCH=x86
                TOOLCHAIN_PREFIX=i686-linux-android
                CONFIGURE_ARCH=android-x86
                PLATFORM_OUTPUT_DIR=x86
                ANDROID_PLATFORM_VERSION=android-9
                ;;
            x86_64)
                TOOLCHAIN_ARCH=x86_64
                TOOLCHAIN_PREFIX=x86_64-linux-android
                CONFIGURE_ARCH=android64
                PLATFORM_OUTPUT_DIR=x86_64
                ANDROID_PLATFORM_VERSION=android-21
                ;;
            arm64-v8a)
                TOOLCHAIN_ARCH=arm64
                TOOLCHAIN_PREFIX=aarch64-linux-android
                CONFIGURE_ARCH=android64-aarch64
                PLATFORM_OUTPUT_DIR=arm64-v8a
                ANDROID_PLATFORM_VERSION=android-21
                ;;                
            *)
                echo "Unsupported build platform:${SQLCIPHER_TARGET_PLATFORM}"
                exit 1
        esac

        mkdir -p "${ANDROID_LIB_ROOT}/${SQLCIPHER_TARGET_PLATFORM}"
        ${ANDROID_NDK_ROOT}/build/tools/make-standalone-toolchain.sh \
                           --platform=${ANDROID_PLATFORM_VERSION} \
                           --install-dir=${ANDROID_TOOLCHAIN_DIR} \
                           --arch=${TOOLCHAIN_ARCH}

        export PATH=${ANDROID_TOOLCHAIN_DIR}/bin:$PATH
        export CROSS_SYSROOT=${ANDROID_TOOLCHAIN_DIR}/sysroot
    
        RANLIB=${TOOLCHAIN_PREFIX}-ranlib \
              AR=${TOOLCHAIN_PREFIX}-ar \
              CC=${TOOLCHAIN_PREFIX}-gcc \
              ./Configure "${CONFIGURE_ARCH}" "${OPENSSL_CONFIGURE_OPTIONS}"

        if [ $? -ne 0 ]; then
            echo "Error executing:./Configure ${CONFIGURE_ARCH} ${OPENSSL_CONFIGURE_OPTIONS}"
            exit 1
        fi
        
        make clean
        make

        if [ $? -ne 0 ]; then
            echo "Error executing make for platform:${SQLCIPHER_TARGET_PLATFORM}"
            exit 1
        fi
        
        mv libcrypto.a ${ANDROID_LIB_ROOT}/${PLATFORM_OUTPUT_DIR}
        rm -rf ${ANDROID_TOOLCHAIN_DIR}
    done    
)
