#!/bin/sh
# Copyright (C) Pierre d'Herbemont, 2010
# Copyright (C) Felix Paul Kühne, 2012-2019

set -e

BUILD_DEVICE=yes
BUILD_SIMULATOR=yes
BUILD_STATIC_FRAMEWORK=no
BUILD_DYNAMIC_FRAMEWORK=no
SDK_VERSION=`xcrun --sdk iphoneos --show-sdk-version`
SDK_MIN=9.0
VERBOSE=no
DISABLEDEBUG=no
CONFIGURATION="Debug"
NONETWORK=no
SKIPLIBVLCCOMPILATION=no
TVOS=no
MACOS=no
IOS=yes
BITCODE=no
OSVERSIONMINCFLAG=iphoneos
OSVERSIONMINLDFLAG=ios
ROOT_DIR=empty
FARCH="all"

TESTEDHASH="361ad729d" # libvlc hash that this version of VLCKit is build on

usage()
{
cat << EOF
usage: $0 [-s] [-v] [-k sdk]

OPTIONS
   -k       Specify which sdk to use (see 'xcodebuild -showsdks', current: ${SDK})
   -v       Be more verbose
   -s       Build framework only for simulator (default both)
   -f       Build framework only for device (default both)
   -r       Disable Debug for Release
   -n       Skip script steps requiring network interaction
   -l       Skip libvlc compilation
   -t       Build for tvOS
   -x       Build for macOS / Mac OS X
   -b       Enable bitcode
   -a       Build framework for specific arch (all|i386|x86_64|armv7|aarch64)
   -e       External VLC source path
EOF
}

get_actual_arch() {
    if [ "$1" = "aarch64" ]; then
        echo "arm64"
    else
        echo "$1"
    fi
}

get_arch() {
    if [ "$1" = "arm64" ]; then
        echo "aarch64"
    else
        echo "$1"
    fi
}

is_simulator_arch() {
    if [ "$1" = "i386" -o "$1" = "x86_64" ];then
        return 0
    else
        return 1
    fi
}

spushd()
{
     pushd "$1" 2>&1> /dev/null
}

spopd()
{
     popd 2>&1> /dev/null
}

info()
{
     local green="\033[1;32m"
     local normal="\033[0m"
     echo "[${green}info${normal}] $1"
}

buildxcodeproj()
{
    local target="$2"
    local PLATFORM="$3"

    info "Building $1 ($target, ${CONFIGURATION}, $PLATFORM)"

    local architectures=""
    if [ "$FARCH" = "all" ];then
        if [ "$TVOS" = "yes" ]; then
            if [ "$PLATFORM" = "appletvsimulator" ]; then
                architectures="x86_64"
            else
                architectures="arm64"
            fi
        fi
        if [ "$IOS" = "yes" ]; then
            if [ "$PLATFORM" = "iphonesimulator" ]; then
                architectures="i386 x86_64"
            else
                architectures="armv7 arm64"
            fi
        fi
    else
        architectures=`get_actual_arch $FARCH`
    fi

    local bitcodeflag=""
    if [ "$BITCODE" = "yes" ]; then
        bitcodeflag="BITCODE_GENERATION_MODE=bitcode"
    fi

    local defs="$GCC_PREPROCESSOR_DEFINITIONS"

    xcodebuild -project "$1.xcodeproj" \
               -target "$target" \
               -sdk $PLATFORM$SDK \
               -configuration ${CONFIGURATION} \
               ARCHS="${architectures}" \
               IPHONEOS_DEPLOYMENT_TARGET=${SDK_MIN} \
               GCC_PREPROCESSOR_DEFINITIONS="$defs" \
               ${bitcodeflag} \
               > ${out}
}

buildLibVLC() {
    ARCH="$1"
    PLATFORM="$2"

    if [ "$DISABLEDEBUG" = "yes" ]; then
        DEBUGFLAG="--disable-debug"
    else
        DEBUGFLAG=""
    fi
    if [ "$VERBOSE" = "yes" ]; then
        VERBOSEFLAG="--verbose"
    else
        VERBOSEFLAG=""
    fi
    if [ "$BITCODE" = "yes" ]; then
        BITCODEFLAG="--enable-bitcode"
    else
        BITCODEFLAG=""
    fi
    info "Compiling ${ARCH} with SDK version ${SDK_VERSION}, platform ${PLATFORM}"

    ACTUAL_ARCH=`get_actual_arch $ARCH`
    BUILDDIR="${VLCROOT}/build-${PLATFORM}-${ACTUAL_ARCH}"

    mkdir -p ${BUILDDIR}
    spushd ${BUILDDIR}

    ../extras/package/apple/build.sh \
        --arch=$ARCH \
        --sdk=${PLATFORM}${SDK_VERSION} \
        --build-libvlc=dynamic \
        --build-modules=static \
        ${DEBUGFLAG} ${VERBOSEFLAG} ${BITCODEFLAG}

    # COPY to the framework:
    #  - ${VLC_INSTALL_DIR}/lib/libvlc.dylib
    #  - ${VLC_INSTALL_DIR}/lib/libvlccore.dylib
    #  - ${VLC_INSTALL_DIR}/lib/libvlcmodules_plugin.dylib
    #  - ${VLC_INSTALL_DIR}/include/vlc/plugins.manifest.h

    spopd # builddir

    info "Finished compiling libvlc for ${ARCH} with SDK version ${SDK_VERSION}, platform ${PLATFORM}"
}

buildMobileKit() {
    PLATFORM="$1"

    if [ "$SKIPLIBVLCCOMPILATION" != "yes" ]; then
        if [ "$FARCH" = "all" ];then
            if [ "$TVOS" = "yes" ]; then
                if [ "$PLATFORM" = "iphonesimulator" ]; then
                    buildLibVLC "x86_64" "appletvsimulator"
                else
                    buildLibVLC "aarch64" "appletvos"
                fi
            fi
            if [ "$MACOS" = "yes" ]; then
                buildLibVLC "x86_64" "macosx"
            fi
            if [ "$IOS" = "yes" ]; then
                if [ "$PLATFORM" = "iphonesimulator" ]; then
                    buildLibVLC "i386" $PLATFORM
                    buildLibVLC "x86_64" $PLATFORM
                else
                    buildLibVLC "armv7" $PLATFORM
                    buildLibVLC "aarch64" $PLATFORM
                fi
            fi
        else
            if [ "$FARCH" != "x86_64" -a "$FARCH" != "aarch64" -a "$FARCH" != "i386" \
              -a "$FARCH" != "armv7" ];then
                echo "*** Framework ARCH: ${FARCH} is invalid ***"
                exit 1
            fi
            if (is_simulator_arch $FARCH);then
                if [ "$TVOS" = "yes" ]; then
                    PLATFORM="appletvsimulator"
                fi
                if [ "$IOS" = "yes" ]; then
                    PLATFORM="iphonesimulator"
                fi
                if [ "$MACOS" = "yes" ]; then
                    PLATFORM="macosx"
                fi
            else
                if [ "$TVOS" = "yes" ]; then
                    PLATFORM="appletvos"
                fi
                if [ "$IOS" = "yes" ]; then
                    PLATFORM="iphoneos"
                fi
                if [ "$MACOS" = "yes" ]; then
                    PLATFORM="macosx"
                fi
            fi

            buildLibVLC $FARCH "$PLATFORM"
        fi
    fi
}

get_symbol()
{
    echo "$1" | grep vlc_entry_$2|cut -d" " -f 3|sed 's/_vlc/vlc/'
}

build_universal_static_lib() {
    PROJECT_DIR=`pwd`
    OSSTYLE="$1"
    info "building universal static libs for $OSSTYLE"

    # remove old module list
    rm -f $PROJECT_DIR/Resources/MobileVLCKit/vlc-plugins-$OSSTYLE.h
    touch $PROJECT_DIR/Resources/MobileVLCKit/vlc-plugins-$OSSTYLE.h

    spushd ${VLCROOT}
    rm -rf install-$OSSTYLE
    mkdir install-$OSSTYLE
    spopd # vlc

    VLCSTATICLIBS=""
    VLCSTATICLIBRARYNAME="static-lib/libvlc-full-static.a"
    VLCSTATICMODULELIST=""

    # brute-force test the available architectures we could lipo
    BUILD_KIND_AVAILABLES="os-arm64 os-armv7 simulator-x86_64 simulator-i386 -x86_64"
    for flavour in $BUILD_KIND_AVAILABLES; do
        staticlibname="${VLCROOT}/build-${OSSTYLE}${flavour}/${VLCSTATICLIBRARYNAME}"
        modulelistname="${VLCROOT}/build-${OSSTYLE}${flavour}/static-lib/plugins.manifest.h"
        if [ -f "$staticlibname" -a -f "$modulelistname" ]; then
            VLCSTATICLIBS+=" $staticlibname"
            VLCSTATICMODULELIST="$modulelistname" # TODO: which one should we choose ?
        else
            echo "${VLCROOT}/build-${OSSTYLE}${flavour}/ not available for lipo"
            if ! [ -f "$staticlibname" ]; then
                echo " -> $staticlibname not available"
            fi
            if ! [ -f "$modulelistname" ]; then
                echo " -> $modulelistname not available"
            fi
        fi
    done

    spushd ${VLCROOT}

    lipo $VLCSTATICLIBS -create -output install-$OSSTYLE/libvlc-full-static.a

    cp $VLCSTATICMODULELIST $PROJECT_DIR/Resources/MobileVLCKit/vlc-plugins-$OSSTYLE.h

    spopd # VLCROOT
}

while getopts "hvsfbrxntlk:a:e:" OPTION
do
     case $OPTION in
         h)
             usage
             exit 1
             ;;
         v)
             VERBOSE=yes
             ;;
         s)
             BUILD_DEVICE=no
             BUILD_SIMULATOR=yes
             BUILD_STATIC_FRAMEWORK=yes
             ;;
         f)
             BUILD_DEVICE=yes
             BUILD_SIMULATOR=no
             BUILD_STATIC_FRAMEWORK=yes
             ;;
         r)  CONFIGURATION="Release"
             DISABLEDEBUG=yes
             ;;
         n)
             NONETWORK=yes
             ;;
         l)
             SKIPLIBVLCCOMPILATION=yes
             ;;
         k)
             SDK=$OPTARG
             ;;
         a)
             FARCH=$OPTARG
             ;;
         b)
             BITCODE=yes
             ;;
         t)
             TVOS=yes
             IOS=no
             BITCODE=yes
             SDK_VERSION=`xcrun --sdk appletvos --show-sdk-version`
             SDK_MIN=10.2
             OSVERSIONMINCFLAG=tvos
             OSVERSIONMINLDFLAG=tvos
             ;;
         x)
             MACOS=yes
             IOS=no
             BITCODE=no
             SDK_VERSION=`xcrun --sdk macosx --show-sdk-version`
             SDK_MIN=10.11
             OSVERSIONMINCFLAG=macosx
             OSVERSIONMINLDFLAG=macosx
             BUILD_DEVICE=yes
             FARCH=x86_64
             BUILD_DYNAMIC_FRAMEWORK=yes
             BUILD_STATIC_FRAMEWORK=no
             ;;
         e)
             VLCROOT=$OPTARG
             ;;
         ?)
             usage
             exit 1
             ;;
     esac
done
shift $(($OPTIND - 1))

out="/dev/null"
if [ "$VERBOSE" = "yes" ]; then
   out="/dev/stdout"
fi

if [ "x$1" != "x" ]; then
    usage
    exit 1
fi

# Get root dir
spushd .
ROOT_DIR=`pwd`
spopd

if [ "$VLCROOT" = "" ]; then
    VLCROOT=${ROOT_DIR}/libvlc/vlc
    info "Preparing build dirs"

    mkdir -p libvlc
    spushd libvlc

    if [ "$NONETWORK" != "yes" ]; then
        if ! [ -e vlc ]; then
            git clone https://git.videolan.org/git/vlc.git vlc
            info "Applying patches to vlc.git"
            cd vlc
            git checkout -B localBranch ${TESTEDHASH}
            git branch --set-upstream-to=origin/master localBranch
            git am ${ROOT_DIR}/libvlc/patches/*.patch
            if [ $? -ne 0 ]; then
                git am --abort
                info "Applying the patches failed, aborting git-am"
                exit 1
            fi
            cd ..
        else
            cd vlc
            git fetch --all
            git reset --hard ${TESTEDHASH}
            git am ${ROOT_DIR}/libvlc/patches/*.patch
            cd ..
        fi
    fi

    spopd
fi

fetch_python3_path() {
    PYTHON3_PATH=$(echo /Library/Frameworks/Python.framework/Versions/3.*/bin | awk '{print $1;}')
    if [ ! -d "${PYTHON3_PATH}" ]; then
        PYTHON3_PATH=""
    fi
}

#
# Build time
#

out="/dev/null"
if [ "$VERBOSE" = "yes" ]; then
   out="/dev/stdout"
fi

if [ "$SKIPLIBVLCCOMPILATION" != "yes" ]; then
    info "Building tools"

    fetch_python3_path
    export PATH="${PYTHON3_PATH}:${VLCROOT}/extras/tools/build/bin:${VLCROOT}/contrib/${TARGET}/bin:/usr/bin:/bin:/usr/sbin:/sbin"

    spushd ${VLCROOT}/extras/tools
    ./bootstrap
    make
    make .buildgas
    make .buildxz
    make .buildtar
    make .buildmeson
    make .buildninja
    spopd #${VLCROOT}/extras/tools
fi

if [ "$BUILD_DEVICE" != "no" ]; then
    buildMobileKit iphoneos
fi
if [ "$BUILD_SIMULATOR" != "no" ]; then
    buildMobileKit iphonesimulator
fi

if [ "$TVOS" = "yes" ]; then
    build_universal_static_lib "AppleTV"
fi
if [ "$MACOS" = "yes" ]; then
    build_universal_static_lib "MacOSX"
fi
if [ "$IOS" = "yes" ]; then
    echo Not building universal static libs
    #build_universal_static_lib "iphone"
fi

info "all done"

copy_libvlc_files() {
    OUTPUT="$1"
    ARCH="$2"
    PLATFORM="$3"
    info "Copy plugin manifest for $PLATFORM-$ARCH to $OUTPUT"

    ACTUAL_ARCH=`get_actual_arch $ARCH`
    BUILDDIR="${VLCROOT}/build-${PLATFORM}-${ACTUAL_ARCH}"

    # HACK: find the path to VLC install directory ourselves, althoug we should
    #       be able to explicit it ourselves instead of relying on the script to
    #       decide for us.
    VLC_INSTALL_DIR="${BUILDDIR}/vlc-${PLATFORM}${SDK_VERSION}-${ACTUAL_ARCH}/"

    mkdir -p "${OUTPUT}/Headers"
    mkdir -p "${OUTPUT}/Libraries"
    cp -p "${VLC_INSTALL_DIR}/include/vlc/plugins.manifest.h" "$OUTPUT/Headers/"
    cp -p "${VLC_INSTALL_DIR}/lib/libvlc.dylib" "$OUTPUT/Libraries/"
    cp -p "${VLC_INSTALL_DIR}/lib/libvlccore.dylib" "$OUTPUT/Libraries/"
    cp -p "${VLC_INSTALL_DIR}/lib/libvlcmodules_plugin.dylib" "$OUTPUT/Libraries/"

    # The application has to set the run-search path to the MobileVLCKit Library folder
    install_name_tool \
        "$OUTPUT/Libraries/libvlc.dylib" \
        -id "@rpath/libvlc.dylib"
    install_name_tool \
        "$OUTPUT/Libraries/libvlccore.dylib" \
        -id "@rpath/libvlccore.dylib"
    install_name_tool \
        "$OUTPUT/Libraries/libvlcmodules_plugin.dylib" \
        \-id "@rpath/libvlcmodules_plugin.dylib"
}

if [ "$BUILD_STATIC_FRAMEWORK" != "no" ]; then
if [ "$TVOS" = "yes" ]; then
    info "Building static TVVLCKit.framework"

    lipo_libs=""
    platform=""
    if [ "$FARCH" = "all" ] || (! is_simulator_arch $FARCH);then
        platform="appletvos"
        buildxcodeproj MobileVLCKit "TVVLCKit" ${platform}
        lipo_libs="$lipo_libs ${CONFIGURATION}-appletvos/libTVVLCKit.a"
    fi
    if [ "$FARCH" = "all" ] || (is_simulator_arch $FARCH);then
        platform="appletvsimulator"
        buildxcodeproj MobileVLCKit "TVVLCKit" ${platform}
        lipo_libs="$lipo_libs ${CONFIGURATION}-appletvsimulator/libTVVLCKit.a"
    fi

    # Assumes both platforms were built currently
    spushd build
    rm -rf TVVLCKit.framework && \
    mkdir TVVLCKit.framework && \
    lipo -create ${lipo_libs} -o TVVLCKit.framework/TVVLCKit && \
    chmod a+x TVVLCKit.framework/TVVLCKit && \
    cp -pr ${CONFIGURATION}-${platform}/TVVLCKit TVVLCKit.framework/Headers
    cp -pr ${CONFIGURATION}-${platform}/Modules TVVLCKit.framework/Modules
    spopd # build

    info "Build of static TVVLCKit.framework completed"
fi
if [ "$IOS" = "yes" ]; then
    info "Building static MobileVLCKit.framework"

    lipo_libs=""
    platform=""

    if [ "$FARCH" = "all" ] || (! is_simulator_arch $FARCH);then
        platform="iphoneos"
        buildxcodeproj MobileVLCKit "MobileVLCKit" ${platform}
        lipo_libs="$lipo_libs ${CONFIGURATION}-iphoneos/libMobileVLCKit.a"
    fi
    if [ "$FARCH" = "all" ] || (is_simulator_arch $FARCH);then
        platform="iphonesimulator"
        buildxcodeproj MobileVLCKit "MobileVLCKit" ${platform}
        lipo_libs="$lipo_libs ${CONFIGURATION}-iphonesimulator/libMobileVLCKit.a"
    fi

    # Assumes both platforms were built currently
    spushd build
    rm -rf MobileVLCKit.framework && \
    mkdir MobileVLCKit.framework && \
    lipo -create ${lipo_libs} -o MobileVLCKit.framework/MobileVLCKit && \
    chmod a+x MobileVLCKit.framework/MobileVLCKit && \
    cp -pr ${CONFIGURATION}-${platform}/MobileVLCKit MobileVLCKit.framework/Headers
    cp -pr ${CONFIGURATION}-${platform}/Modules MobileVLCKit.framework/Modules

    # Only support the non-ALL case for now
    if [ "$FARCH" != "all" ]; then
        copy_libvlc_files MobileVLCKit.framework/ ${FARCH} ${platform}
    fi

    spopd # build

    info "Build of static MobileVLCKit.framework completed"
fi
fi
if [ "$BUILD_DYNAMIC_FRAMEWORK" != "no" ]; then
if [ "$MACOS" = "yes" ]; then
    CURRENT_DIR=`pwd`
    info "Building VLCKit.framework in ${CURRENT_DIR}"

    buildxcodeproj VLCKit "VLCKit" "macosx"

    # remove intermediate build result we don't need to keep
    spushd build
    rm ${CONFIGURATION}/libStaticLibVLC.a
    spopd # build

    info "Build of VLCKit.framework completed"
fi
fi