#!/bin/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="RAW_PATCH_ANALYSIS"
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
}
###############################################################################
checkNoAuthors() {
    authorTags=`grep "^+ " ${PATCHFILE} | grep -c -i -e ".*\*.* @author"`
    if [[ ${authorTags} != 0 ]] ; then
        REPORT+=("{color:red}-1{color} the patch seems to contain ${authorTags} line(s) with @author tags")
    else
        REPORT+=("{color:green}+1{color} the patch does not introduce any @author tags")
    fi
}
###############################################################################
checkNoTabs() {
    tabs=`grep "^+ " ${PATCHFILE} | grep -c -P "\t"`
    if [[ ${tabs} != 0 ]] ; then
        REPORT+=("{color:red}-1{color} the patch contains ${tabs} line(s) with tabs")
    else
        REPORT+=("{color:green}+1{color} the patch does not introduce any tabs")
    fi
}
###############################################################################
checkNoTrailingSpaces() {
    trailingSpaces=`grep "^+ " ${PATCHFILE} | grep -c -e " $"`
    if [[ ${trailingSpaces} != 0 ]] ; then
        REPORT+=("{color:red}-1{color} the patch contains ${trailingSpaces} line(s) with trailing spaces")
    else
        REPORT+=("{color:green}+1{color} the patch does not introduce any trailing spaces")
    fi
}
###############################################################################
checkLinesLength() {
  # We check for > 120 to account for the "+" sign
    longLines=`grep "^+ " ${PATCHFILE} | awk 'BEGIN{count=0}{if ( length > 121 ) { count=count+1} }END{ print count}'`
    if [[ ${longLines} != 0 ]] ; then
        REPORT+=("{color:red}-1{color} the patch contains ${longLines} line(s) longer than 120 characters")
    else
        REPORT+=("{color:green}+1{color} the patch does not introduce any line longer than 120")
    fi
}
###############################################################################
checkForTestcases() {
    testcases=`grep -c -i -e '^+++.*/test' ${PATCHFILE}`
    if [[ ${testcases} == 0 ]] ; then
        REPORT+=("{color:red}-1{color} the patch does not add/modify any testcase")
    #reverting for summary +1 calculation
        testcases=1
    else
        REPORT+=("{color:green}+1{color} the patch does adds/modifies ${testcases} testcase(s)")
    #reverting for summary +1 calculation
        testcases=0
    fi
}
###############################################################################

parseArgs "$@"

case $OP in
pre)
    ;;
post)
    ;;
report)
    REPORT=()
    checkNoAuthors
    checkNoTabs
    checkNoTrailingSpaces
    checkLinesLength
    checkForTestcases
    total=`expr $authorTags + $tabs + $trailingSpaces + $longLines + $testcases`
    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