#!/bin/sh

# Given the base URLs of two SAP Sailing servers, obtains their /sailingserver/api/v1/leaderboardgroups
# service output, sorts it, compares them, and if equal, obtains all corresponding leaderboardgroups/*
# documents and compares those in turn.

options='cevl'
while getopts $options option
do
    case $option in
        c) continue="1";;
	e) exitOnError="1";;
	v) verbose="1";;
        l) list="1";;
        \?) echo "Invalid option"
            exit 4;;
    esac
done
shift $((OPTIND-1))

if [ "$verbose" = "1" ]; then
  WGET_ERR=/dev/stderr
  WGET_QUIET=""
else
  WGET_ERR=/dev/null
  WGET_QUIET="--quiet"
fi

OLDSERVER=$1
NEWSERVER=$2
OLDGROUPS=leaderboardgroups.old.sed
NEWGROUPS=leaderboardgroups.new.sed
OLDGROUPS_FOR_CONTINUE=${OLDGROUPS}.continue
NEWGROUPS_FOR_CONTINUE=${NEWGROUPS}.continue

# If we continue, don't download again
if [ "$continue" != "1" ]; then
  wget $WGET_QUIET -O - ${OLDSERVER}/sailingserver/api/v1/leaderboardgroups | sed -e 's/\",\"/\n/g' -e 's/\[/\n/' -e 's/\]/\n/' -e 's/\"//g' | grep -v "^$" | sort >$OLDGROUPS
  wget $WGET_QUIET -O - ${NEWSERVER}/sailingserver/api/v1/leaderboardgroups | sed -e 's/\",\"/\n/g' -e 's/\[/\n/' -e 's/\]/\n/' -e 's/\"//g' | grep -v "^$" | sort >$NEWGROUPS
fi

download_and_fix_boatclasses () {
    wget $WGET_QUIET -O - "$1/sailingserver/api/v1/leaderboardgroups/`echo $OLD_LB | sed -e 's/ /%20/g'`" | python -m json.tool | grep -v "\"id\": \"[^\"]*\"" | grep -v "\"timepoint\": \"[^\"]*\"" >"$2" 2>$WGET_ERR
}

diff leaderboardgroups.old.sed leaderboardgroups.new.sed
if [ "$?" = "0" ]; then
  cp "$OLDGROUPS" "$OLDGROUPS_FOR_CONTINUE"
  cp "$NEWGROUPS" "$NEWGROUPS_FOR_CONTINUE"
  exec 3<> $OLDGROUPS
  exec 4<> $NEWGROUPS
  read OLD_LB <&3
  read NEW_LB <&4
  while [ "$OLD_LB" != "" ]; do
    if [ "$list" = "1" ]; then
      echo " * $OLD_LB"
    fi
    download_and_fix_boatclasses "${OLDSERVER}" "${OLD_LB}.old.json"
    download_and_fix_boatclasses "${NEWSERVER}" "${NEW_LB}.new.json"
    diff -b -i -B "${OLD_LB}.old.json" "${NEW_LB}.new.json"
    DIFFRESULT=$?
    if [ "$DIFFRESULT" != "0" ]; then
      echo "Difference detected in leaderboard group $OLD_LB vs. $NEW_LB"
      if [ "$exitOnError" = "1" ]; then
	cp "$OLDGROUPS_FOR_CONTINUE" "$OLDGROUPS"
	cp "$NEWGROUPS_FOR_CONTINUE" "$NEWGROUPS"
        echo "Exiting..."
        exit $DIFFRESULT
      fi
    else
      # no diff; remove the leaderboards successfully compared from both leaderboardgroups lists in case a later -c invocation occurs
      sed -i -e '1d' $OLDGROUPS_FOR_CONTINUE
      sed -i -e '1d' $NEWGROUPS_FOR_CONTINUE
    fi
    read OLD_LB <&3
    read NEW_LB <&4
  done
  cp "$OLDGROUPS_FOR_CONTINUE" "$OLDGROUPS"
  cp "$NEWGROUPS_FOR_CONTINUE" "$NEWGROUPS"
else
  # pass on diff result to caller
  exit $?
fi