#!/usr/bin/env bash
set -e

cd "${BASH_SOURCE%/*}/../External/libsodium"
[[ -d libsodium-ios ]] && exit

# Prepare
autoreconf --verbose --install --symlink --force 2>&1 | sed 's/^\([^:]*\):[0-9]\{1,\}: /\1: /'
rm -rf "${prefix=$PWD/libsodium-ios}"
mkdir -p "$prefix/lib" \
    "${prefix_x86_64=$prefix/tmp/x86_64}" \
    "${prefix_armv7=$prefix/tmp/armv7}" \
    "${prefix_armv7s=$prefix/tmp/armv7s}" \
    "${prefix_arm64=$prefix/tmp/arm64}"

# Targets
(
    ## ARCH: x86_64
    export SDKROOT="$(xcrun --show-sdk-path --sdk iphonesimulator)"
    export PATH="$(xcrun --show-sdk-platform-path --sdk iphonesimulator)/usr/bin:$PATH"
    export CFLAGS="-arch x86_64 -isysroot $SDKROOT -mios-simulator-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -O2 -g -flto $CFLAGS"
    export LDFLAGS="-arch x86_64 -isysroot $SDKROOT -mios-simulator-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -flto $LDFLAGS"
    export CPPFLAGS="$CFLAGS $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --disable-shared --prefix="$prefix_x86_64"
    make -j3 install
)
(
    ## ARCH: armv7
    export SDKROOT="$(xcrun --show-sdk-path --sdk iphoneos)"
    export PATH="$(xcrun --show-sdk-platform-path --sdk iphoneos)/usr/bin:$PATH"
    export CFLAGS="-mthumb -arch armv7 -isysroot $SDKROOT -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -O2 -g -flto $CFLAGS"
    export LDFLAGS="-mthumb -arch armv7 -isysroot $SDKROOT -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -flto $LDFLAGS"
    export CPPFLAGS="$CFLAGS $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --target=arm-apple --disable-shared --prefix="$prefix_armv7"
    make -j3 install
)
(
    ## ARCH: armv7s
    export SDKROOT="$(xcrun --show-sdk-path --sdk iphoneos)"
    export PATH="$(xcrun --show-sdk-platform-path --sdk iphoneos)/usr/bin:$PATH"
    export CFLAGS="-mthumb -arch armv7s -isysroot $SDKROOT -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -O2 -g -flto $CFLAGS"
    export LDFLAGS="-mthumb -arch armv7s -isysroot $SDKROOT -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -flto $LDFLAGS"
    export CPPFLAGS="$CFLAGS $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --target=arm-apple --disable-shared --prefix="$prefix_armv7s"
    make -j3 install
)
(
    ## ARCH: arm64
    export SDKROOT="$(xcrun --show-sdk-path --sdk iphoneos)"
    export PATH="$(xcrun --show-sdk-platform-path --sdk iphoneos)/usr/bin:$PATH"
    export CFLAGS="-mthumb -arch arm64 -isysroot $SDKROOT -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -O2 -g -flto $CFLAGS"
    export LDFLAGS="-mthumb -arch arm64 -isysroot $SDKROOT -mios-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -flto $LDFLAGS"
    export CPPFLAGS="$CFLAGS $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --target=arm-apple --disable-shared --prefix="$prefix_arm64"
    make -j3 install
)

# Merge Binaries
lipo -create \
  "$prefix_x86_64/lib/libsodium.a" \
  "$prefix_armv7/lib/libsodium.a" \
  "$prefix_armv7s/lib/libsodium.a" \
  "$prefix_arm64/lib/libsodium.a" \
  -output "$prefix/lib/libsodium.a"
mv -f -- "$prefix_arm64/include" "$prefix/"

# Cleanup
rm -rf -- "$prefix/tmp"
make -s distclean