#!/bin/bash

# GNU Parallel SQL tests
# The tests must be able to run in parallel

export SQLITE=sqlite3:///%2Frun%2Fshm%2Fparallel.db
export PG=pg://`whoami`:`whoami`@lo/`whoami`
export MYSQL=mysql://`whoami`:`whoami`@lo/`whoami`
export CSV=csv:///%2Frun%2Fshm

export DEBUG=false
rm -f /run/shm/parallel.db
mkdir -p /run/shm/csv

p_showsqlresult() {
  SERVERURL=$1
  TABLE=$2
  sql $SERVERURL "select Host,Command,V1,V2,Stdout,Stderr from $TABLE order by seq;"
}

p_wrapper() {
  INNER=$1
  SERVERURL=$(eval echo $2)
  TABLE=TBL$RANDOM
  DBURL=$SERVERURL/$TABLE
  T1=$(tempfile)
  T2=$(tempfile)
  eval "$INNER"
  echo Exit=$?
  wait
  echo Exit=$?
  $DEBUG && sort -u $T1 $T2;
  rm $T1 $T2
  p_showsqlresult $SERVERURL $TABLE
  $DEBUG || sql $SERVERURL "drop table $TABLE;" >/dev/null 2>/dev/null
}

p_template() {
  (sleep 6;
   parallel --sqlworker $DBURL    "$@" sleep .3\;echo >$T1) &
  parallel  --sqlandworker $DBURL "$@" sleep .3\;echo ::: {1..5} ::: {a..e} >$T2;
}

par_sqlandworker() {
  p_template
}

par_sqlandworker_lo() {
  p_template -S lo
}

par_sqlandworker_results() {
  p_template --results /tmp/out--sql
}

par_sqlandworker_linebuffer() {
  p_template --linebuffer
}

par_sqlandworker_tag() {
  p_template --tag
}

par_sqlandworker_linebuffer_tag() {
  p_template --linebuffer --tag
}

par_sqlandworker_compress_linebuffer_tag() {
  p_template --compress --linebuffer --tag
}

par_sqlandworker_unbuffer() {
  p_template -u
}

par_sqlandworker_total_jobs() {
  p_template echo {#} of '{=1 $_=total_jobs(); =};'
}

par_append() {
  parallel --sqlmaster  $DBURL sleep .3\;echo ::: {1..5} ::: {a..e} >$T2;
  parallel --sqlmaster +$DBURL sleep .3\;echo ::: {11..15} ::: {A..E} >>$T2;
  parallel --sqlworker  $DBURL sleep .3\;echo >$T1
}

par_shuf() {
  MD5=$(echo $SERVERURL | md5sum | perl -pe 's/(...).*/$1/')
  T=/tmp/parallel-bug49791-$MD5
  [ -e $T ] && rm -rf $T
  export PARALLEL="--shuf --result $T"
  parallel --sqlandworker $DBURL sleep .3\;echo \
    ::: {1..5} ::: {a..e} >$T2;
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  unset PARALLEL
  wait;
  # Did it compute correctly?
  cat $T/1/*/*/*/stdout
  # Did it shuffle (Compare job table to non-shuffled)
  SHUF=$(sql $SERVERURL "select Host,Command,V1,V2,Stdout,Stderr from $TABLE order by seq;")
  export PARALLEL="--result $T"
  parallel --sqlandworker $DBURL sleep .3\;echo \
    ::: {1..5} ::: {a..e} >$T2;
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  parallel --sqlworker    $DBURL sleep .3\;echo >$T2 &
  unset PARALLEL
  wait;
  NOSHUF=$(sql $SERVERURL "select Host,Command,V1,V2,Stdout,Stderr from $TABLE order by seq;")
  DIFFSIZE=$(diff <(echo "$SHUF") <(echo "$NOSHUF") | wc -c)
  if [ $DIFFSIZE -gt 2500 ]; then
    echo OK: Diff bigger than 2500 char
  fi
  [ -e $T ] && rm -rf $T
  touch $T1
}

par_empty() {
    true;
}

hostname=`hostname`
export -f $(compgen -A function | egrep 'p_|par_')
# Tested that -j0 in parallel is fastest (up to 15 jobs)
# -j5: SQLite complains about locked database.
compgen -A function | grep par_ | sort |
  stdout parallel -vj4 -k --tag --joblog /tmp/jl-`basename $0` p_wrapper \
	 :::: - ::: \$MYSQL \$PG \$SQLITE \$CSV |
  perl -pe 's/tbl\d+/TBL99999/gi;' |
  perl -pe 's/(from TBL99999 order) .*/$1/g' |
  perl -pe 's/ *\b'"$hostname"'\b */hostname/g' | 
  grep -v -- --------------- |
  perl -pe 's/ *\bhost\b */host/g' |
  perl -pe 's/ +/ /g'