#! /bin/bash

# https://developer.apple.com/download/more/

if [ $# -lt 1 ]
then
    echo "missing mandatory argument(s) : SDK version"
    exit 1
fi

DIR=$(pwd)

function build_darling()
{
    echo "***** build_darling *****"
    if [ ! -d darling-dmg ]
    then
        git clone https://github.com/darlinghq/darling-dmg.git
    fi
    pushd darling-dmg && git pull
    [ ! -d build ] && mkdir build
    cd build && cmake .. -DCMAKE_BUILD_TYPE=Release && make -j 4
    popd
}

function build()
{
    VERSION=$1

    XCODE_DMG=Xcode_$VERSION.dmg
    XCODE_XPI=Xcode_$VERSION.xip
    SDK=$DIR/iPhoneOS$VERSION.sdk.tar.xz
    TOOLCHAIN=$DIR/toolchain-$VERSION
    SDK_DIR=iPhoneSDK/iPhoneOS9.1.sdk

    [ -f $SDK ] && rm $SDK
    [ -d $TOOLCHAIN ] && rm -fr $TOOLCHAIN
    rm -fr xcode iPhoneSDK 2>/dev/null

    mkdir xcode || exit 1
    mkdir -p $SDK_DIR || exit 1

    if [ -f $XCODE_DMG ]
    then
        echo "***** extract from $XCODE_DMG *****"
        ./darling-dmg/build/darling-dmg $XCODE_DMG xcode
        cp -r xcode/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/* $SDK_DIR
        cp -r xcode/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/* $SDK_DIR/usr/include/c++
        fusermount -u xcode
    fi
    if [ -f $XCODE_XPI ]
    then
        echo "***** extract from $XCODE_XPI *****"
        xar -xf $XCODE_XPI || exit 1
        rm Metadata
        pbzx -n Content | cpio -i
        rm Content
        cp -r Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/* $SDK_DIR
        cp -r Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include/c++/* $SDK_DIR/usr/include/c++
        rm -fr Xcode.app
    fi

    pushd iPhoneSDK
    echo "***** compress $SDK *****"
    tar -cf - * | xz -9 -c - > $SDK
    popd
    rm -fr xcode iPhoneSDK 2>/dev/null

    # build toolchain
    echo "***** build $TOOLCHAIN *****"
    if [ ! -d cctools-port ]
    then
        git clone https://github.com/tpoechtrager/cctools-port.git
    fi
    cd cctools-port && git pull
    cd usage_examples/ios_toolchain
    ./build.sh $SDK arm64
    cp -R target/bin $TOOLCHAIN
    cd $DIR
    pushd toolchain-$VERSION && mkdir usr && cd usr && ln -s .. bin
    popd
}

build_darling
for VERSION in $@
do
    echo "##### build $VERSION #####"
    build $VERSION
done