#!/bin/bash

USAGE="usage: eos-test-fusex-messaging <mnt1-prefix> [<mnt2-prefix> <period> <mgm-url> <mgm-prefix>]"

[[ -z "$1" ]] && echo $USAGE  && exit -1
[[ -z "$2" ]] && echo $USAGE && exit -1


mnt1=$1
mnt2=$2
period=${3-250000};

mtime1=0;
mtime2=0;
mtime3=0;
mtime4=0;
oldcontent="";

function changed() {
  mtime3=`stat -c %y $mnt1/$1`;
  mtime4=`stat -c %y $mnt2/$1`; 

  if [ "$mtime1" = "$mtime3" ]; then
      echo "changed: failed $2 $mtime1 $mtime3";
      exit $2;
  fi

  if [ "$mtime2" = "$mtime4" ]; then
      echo "changed: failed $2 $mtime2 $mtime4";
      exit $2;
  fi
}

function unchanged() {
  mtime3=`stat -c %y $mnt1/$1`;
  mtime4=`stat -c %y $mnt2/$1`; 

  if [ "$mtime1" != "$mtime3" ]; then
      echo "changed: failed $2 $mtime1 $mtime3";
      exit $2;
  fi

  if [ "$mtime2" != "$mtime4" ]; then
      echo "changed: failed $2 $mtime2 $mtime4";
      exit $2;
  fi
}

function compare() {
  mtime1=`stat -c %y $mnt1/$1`;
  mtime2=`stat -c %y $mnt2/$1`; 

  echo "mnt1:$mtime1"
  echo "mnt2:$mtime2"

  if [ "$mtime1" != "$mtime2" ]; then
      echo "compare: failed $2"
      exit $2;
  fi
}

function content() {
  oldcontent=`cat $1`; 
  echo content:$1: $oldcontent;
}

function content_compare() {
  newcontent=`cat $1`;
  echo compare: $oldcontent $newcontent
  if [ "$oldcontent" != "$newcontent" ]; then
      echo $oldcontent $newcontent
      echo "content: content propagation faild $2"
      exit $2;
  fi
  echo $oldcontent $newcontent
}
  


set -e
echo --------------------
echo touch of a directory
echo --------------------
if [ ! -d $mnt1/mtime ]; then
  mkdir -p $mnt1/mtime
  usleep $period 
  compare "mtime" 1
fi
touch $mnt1/mtime
usleep $period 
compare "mtime" 2
touch $mnt2/mtime
usleep $period 
compare "mtime" 3
usleep $period
echo ALL OK
echo --------------------
echo touch of a file
echo --------------------
touch $mnt1/mtime/file
usleep $period 
compare "mtime" 4
compare "mtime/file" 4
touch $mnt1/mtime/file
usleep $period 
changed "mtime/file" 5
compare "mtime/file" 5
compare "mtime" 5
touch $mnt1/mtime/file
usleep $period 
unchanged "mtime" 6
compare "mtime/file" 6
compare "mtime" 6
echo ALL OK
echo --------------------
echo add a file
echo --------------------
ls $mnt2/mtime/ > /dev/null
touch $mnt1/mtime/newfile > /dev/null 
usleep $period
test -f $mnt2/mtime/newfile || exit 7
echo ALL OK

echo --------------------
echo remove a file
echo --------------------
ls $mnt2/mtime > /dev/null
rm -f $mnt1/mtime/newfile
usleep $period
test -e $mnt2/mtime/newfile && exit 8
test -e $mnt2/mtime/newfile && exit 8
echo ALL OK

echo --------------------
echo update a file
echo --------------------
echo create client 2
touch $mnt2/mtime/newfile
usleep $period
echo cache client 2
cat  $mnt2/mtime/newfile  >& /dev/null
echo overwrite client 1.1
now=`date +%s.%N`
echo now: $now
echo $now > $mnt1/mtime/newfile
content "$mnt1/mtime/newfile"
usleep $period
content_compare "$mnt1/mtime/newfile" 9
content_compare "$mnt2/mtime/newfile" 9
echo overwrite client 1.2
now=`date +%s.%N`
echo now: $now
echo $now > $mnt1/mtime/newfile
content "$mnt1/mtime/newfile"
usleep $period
echo compare 1
content_compare "$mnt1/mtime/newfile" 10
echo compare 2
content_compare "$mnt2/mtime/newfile" 10
echo ovewrite client 1.3
now=`date +%s.%N`
echo now: $now
echo $now > $mnt1/mtime/newfile
content "$mnt1/mtime/newfile"
usleep $period
content_compare "$mnt1/mtime/newfile" 11
content_compare "$mnt2/mtime/newfile" 11
echo ALL OK
echo --------------------
echo atomic replace
echo --------------------

for name in `seq 1 10`; do 
date +%s.%N > $mnt1/mtime/.newfile
mv -f $mnt1/mtime/.newfile $mnt1/mtime/newfile
usleep $period
content "$mnt1/mtime/newfile"
content_compare "$mnt2/mtime/newfile"

compare "mtime/newfile" 12
compare "mtime" 13
done
echo ALL OK

if [ "$4" != "" ]; then
echo --------------------
echo external changes
echo --------------------

eos $i file touch $5/mtime/external
usleep $period
compare "mtime" 14
compare "mtime/external" 15
eos $4 mv $5/mtime/external $5/mtime/external.mv
usleep $period
compare "mtime" 16
compare "mtime/external.mv" 17
eos $4 rm $5/mtime/external.mv
usleep $period
compare "mtime" 17
if [ -e "$5/mtime/external.mv" ]; then
    exit 18;
fi
if [ -e "$5/mtime/external.mv" ]; then 
    exit 19;
fi 
echo ALL OK
fi