#!/sbin/sh

OUTFD="/proc/self/fd/$2"
ZIP=$3

exec_util() {
  LD_LIBRARY_PATH=$LD_PATH $UTILS $1
}

set_con() {
  exec_util "chcon -h u:object_r:"$1":s0 $2"
  exec_util "chcon u:object_r:"$1":s0 $2"
}

set_perm() {
  exec_util "chmod $1 $2"
}

set_owner() {
  exec_util "chown $1:$2 $3"
}

ui_print() {
  echo "ui_print $1" > "$OUTFD";
  echo "ui_print" > "$OUTFD";
}

ui_print "**********************"
ui_print "MindTheGapps installer"
ui_print "**********************"

ABDEVICE=`getprop ro.build.system_root_image`

ui_print "Mounting system partition"

if [ "$ABDEVICE" == "true" ]; then
  SYSTEM="/system/system"
  # TODO: Actually handle A/B ota devices
  ui_print "A/B OTA device detected! This is unsupported. Aborting"
  exit 1
else
  SYSTEM="/system"
  if mount $SYSTEM; then
    ui_print "$SYSTEM mounted"
  else
    ui_print "Could not mount $SYSTEM! Aborting"
  exit 1
  fi
fi

if [ -f $SYSTEM/bin/toybox ]; then
  UTILS=$SYSTEM/bin/toybox
  LD_PATH=$SYSTEM/lib
else
  ui_print "Could not find $SYSTEM/bin/toybox! Aborting"
  exit 1
fi

DIRS="addon.d app priv-app framework etc lib"

if [ -d $SYSTEM/lib64 ]; then
  DIRS="$DIRS lib64"
  LD_PATH=$SYSTEM/lib64
fi

LOWMEM=1572864
MEM=`cat /proc/meminfo | head -1 | sed 's/[^0-9]*//g'`

ui_print "Extracting files"
cd /tmp
unzip -o "$ZIP"
exec_util "rm -rf META-INF"
cd system
#if [ "$MEM" -lt "$LOWMEM" ]; then
#  ui_print "Low RAM device detected, removing Google SuW"
  exec_util "rm -rf priv-app/SetupWizard"
#fi
ui_print "Generating addon.d file"
cat addon.d/addond_head > addon.d/30-gapps.sh
for f in `exec_util "find . -type f"`; do
  line=$(echo "$f" | sed 's/\.\///')
  echo "$line" >> addon.d/30-gapps.sh
done
cat addon.d/addond_tail >> addon.d/30-gapps.sh
ui_print "Preparing files for copying"
for dirs in $DIRS; do
  set_perm 0755 $dir
  for d in `exec_util "find ./$dir -type d"`; do
    set_perm 0755 $d
    set_owner root root $d
  done
  for f in `exec_util "find ./$dir -type f"`; do
    type=$(echo "$f" | sed 's/.*\.//')
    if [ "$type" == "sh" ] || [ "$type" == "$f" ]; then
      set_perm 0755 $f
    else
      set_perm 0644 $f
    fi
    set_owner root root $f
    set_con system_file $f
  done
done
ui_print "Copying files"
exec_util "cp --preserve=a -r ./* $SYSTEM/"
ui_print "Cleaning up files"
cd ../
exec_util "rm -rf system/"

ui_print "Unmounting system partition"
umount $SYSTEM

ui_print "Done!"
exit 0