#!/usr/bin/env bash
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.

if [ "${TESTPATCHDEBUG}" == "true" ] ; then
  set -x
fi

BASEDIR=$(pwd)
TASKNAME="BACKWARDS_COMPATIBILITY"
OP=""
TEMPDIR=""
REPORTDIR=""
SUMMARYFILE=""
PATCHFILE=""

###############################################################################
cleanupAndExit() {
  exit $1
}
###############################################################################
printUsage() {
  echo "Usage: $0 --taskname | (--op=pre|post|report --tempdir=<TEMP DIR> --reportdir=<REPORT DIR> --summaryfile=<SUMMARY FILE>)"
  echo
}
###############################################################################
parseArgs() {
  for i in $*
  do
    case $i in
    --taskname)
      echo ${TASKNAME}
      exit 0
      ;;
    --op=*)
      OP=${i#*=}
      ;;
    --tempdir=*)
      TEMPDIR=${i#*=}
      ;;
    --reportdir=*)
      REPORTDIR=${i#*=}
      ;;
    --summaryfile=*)
      SUMMARYFILE=${i#*=}
      ;;
    --patchfile=*)
      PATCHFILE=${i#*=}
      ;;
    esac
  done
  if [[ "${TASKNAME}" == "" || "${OP}" == "" || "${TEMPDIR}" == "" || "${REPORTDIR}" == "" || "${SUMMARYFILE}" == "" || "${PATCHFILE}" == "" ]] ; then
    echo "Missing options"
    echo
    printUsage
    cleanupAndExit 1
  fi
  if [[ "${OP}" != "pre" && "${OP}" != "post" && "${OP}" != "report" ]] ; then
    echo "Invalid operation"
    echo
    printUsage
    cleanupAndExit 1
  fi
}
###############################################################################
checkJPAAnnotations() {
  annotations=`grep -c -E "^(\+|\-).*(@Column|@Lob|@Basic|@Entity|@Transient)" ${PATCHFILE}`
  if [[ ${annotations} != 0 ]] ; then
    REPORT+=("{color:red}-1{color} the patch seems to change ${annotations} line(s) with JPA Entity/Colum/Basic/Lob/Transient annotations")
  else
    REPORT+=("{color:green}+1{color} the patch does not change any JPA Entity/Colum/Basic/Lob/Transient annotations")
  fi
}
###############################################################################
checkJPAFiles() {
  persistenceXml=`grep -c -i -E '^\+\+\+.*/persistence.xml' ${PATCHFILE}`
  ormXml=`grep -c -i -E '^\+\+\+.*/*-orm.xml' ${PATCHFILE}`
  jpaFiles=`expr $persistenceXml + $ormXml`
  if [[ ${jpaFiles} != 0 ]] ; then
    REPORT+=("{color:red}-1{color} the patch modifies ${jpaFiles} JPA file(s), persistence.xml or *-orm.xml")
  else
    REPORT+=("{color:green}+1{color} the patch does not modify JPA files")
  fi
}
###############################################################################

parseArgs "$@"

case $OP in
  pre)
    ;;
  post)
    ;;
  report)
    REPORT=()
    checkJPAAnnotations
    checkJPAFiles
    total=`expr $annotations + $jpaFiles`
    if [[ $total == 0 ]] ; then
      echo "{color:green}+1 ${TASKNAME}{color}" >> $SUMMARYFILE
    else
      echo "{color:red}-1 ${TASKNAME}{color}" >> $SUMMARYFILE
    fi
    for line in "${REPORT[@]}" ; do
      echo ".    ${line}" >> $SUMMARYFILE
    done
    ;;
esac

exit 0