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

hash automake || { echo >&2 "Missing automake."; exit 1; }
hash autoreconf || { echo >&2 "Missing autoconf."; exit 1; }
hash libtool || hash glibtool || { echo >&2 "Missing libtool."; exit 1; }

cd "${BASH_SOURCE%/*}/../External/libsodium"
[[ $1 = clean ]] && { [[ ! -e Makefile ]] || make -s distclean; exit; }
[[ -e "${prefix=$PWD/libsodium-ios}/lib/libsodium.a" ]] && exit

# Prepare
autoreconf --verbose --install --symlink 2> >(sed 's/^\([^:]*\):[0-9]\{1,\}: /\1: /')
rm -rf "${prefix=$PWD/libsodium-ios}"
mkdir -p "$prefix/lib" \
    "${prefix_i386=$prefix/tmp/i386}" \
    "${prefix_x86_64=$prefix/tmp/x86_64}" \
    "${prefix_armv7=$prefix/tmp/armv7}" \
    "${prefix_armv7s=$prefix/tmp/armv7s}" \
    "${prefix_arm64=$prefix/tmp/arm64}"

# Targets
(
    ## ARCH: i386
    SDKROOT="$(xcrun --show-sdk-path --sdk iphonesimulator)"
    PATH="$(xcrun --show-sdk-platform-path --sdk iphonesimulator)/usr/bin:$PATH"
    export CFLAGS="-arch i386 -isysroot $SDKROOT -mios-simulator-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -O2 -g -flto $CFLAGS"
    export LDFLAGS="-arch i386 -isysroot $SDKROOT -mios-simulator-version-min=${IPHONEOS_DEPLOYMENT_TARGET:-8.0} -flto $LDFLAGS"
    export CPPFLAGS="$CFLAGS $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=i686-apple --disable-shared --enable-minimal --prefix="$prefix_i386"
    make -j3 install
)
(
    ## ARCH: x86_64
    SDKROOT="$(xcrun --show-sdk-path --sdk iphonesimulator)"
    PATH="$(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 $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --disable-shared --enable-minimal --prefix="$prefix_x86_64"
    make -j3 install
)
(
    ## ARCH: armv7
    SDKROOT="$(xcrun --show-sdk-path --sdk iphoneos)"
    PATH="$(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 $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --target=arm-apple --disable-shared --enable-minimal --prefix="$prefix_armv7"
    make -j3 install
)
(
    ## ARCH: armv7s
    SDKROOT="$(xcrun --show-sdk-path --sdk iphoneos)"
    PATH="$(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 $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --target=arm-apple --disable-shared --enable-minimal --prefix="$prefix_armv7s"
    make -j3 install
)
(
    ## ARCH: arm64
    SDKROOT="$(xcrun --show-sdk-path --sdk iphoneos)"
    PATH="$(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 $CPPFLAGS"
    [[ -e Makefile ]] && make -s distclean
    ./configure --host=x86_64-apple --target=arm-apple --disable-shared --enable-minimal --prefix="$prefix_arm64"
    make -j3 install
)

# Merge Binaries
mv -f -- "$prefix_arm64/include" "$prefix/"
lipo -create \
  "$prefix_i386/lib/libsodium.a" \
  "$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"

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