#!/data/data/com.termux/files/usr/bin/sh
set -e -u

PREFIX=/data/data/com.termux/files/usr

echo -n 'Checking Android version... '
API_LEVEL=`getprop ro.build.version.sdk`
if [ $API_LEVEL -lt 24 ]; then
    echo This device is not running Android 7.0 or later.
    exit 1
fi
echo Ok

BACKUP_SCRIPT=$HOME/termux-reinstall.sh
echo -n "Creating backup script ~/termux-reinstall.sh ... "
echo pkg install `dpkg-query -f '${binary:Package}\n' -W` > $BACKUP_SCRIPT
chmod +x $BACKUP_SCRIPT
echo Ok
echo ''

echo 'WARNING: This will remove the directory:'
echo $PREFIX
echo ''
echo 'Make sure that this is ok before proceeding.'
echo 'Proceed with removing? [yN]'
read ANSWER
case $ANSWER in
    y|Y|yes)
       break
       ;;
   *)
       echo 'Aborting...'
       exit 1
esac

echo -n "Removing $PREFIX ... "
echo rm -Rf /data/data/com.termux/files/usr
echo Ok
echo 'Now close all Termux sessions and reopen the app.'
echo 'After restarting, execute ~/termux-reinstall.sh to reinstall packages.'