#!/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=$(pwd)
TESTPATCHDIRNAME=test-patch
TESTPATCHDIR=${BASEDIR}/${TESTPATCHDIRNAME}
TOOLSDIR=${TESTPATCHDIR}/tools
TEMPDIR=${TESTPATCHDIR}/tmp
REPORTDIR=${TESTPATCHDIR}/reports
SUMMARYFILE=${REPORTDIR}/TEST-SUMMARY.jira
SUMMARYFILETXT=${REPORTDIR}/TEST-SUMMARY.txt

JIRAHOST="https://issues.apache.org"
JIRAURL="${JIRAHOST}/jira"
JIRAURLISSUEPREFIX="${JIRAURL}/browse/"

JIRAUPDATE="false"
JIRAUSER=""
JIRAPASSWORD=""


VERBOSEOPTION=""
JIRAISSUE=""
PATCHFILE=""
TASKSTORUN=""
TASKSTOSKIP=""
RESETSCM="false"
DIRTYSCM="false"
STDOUT="/dev/null"
MVNPASSTHRU=""

###############################################################################
gitOrSvn() {
    SCM="NONE"
    which git &> /dev/null
    if [[ $? == 0 ]] ; then
        git status &> /dev/null
        if [[ $? == 0 ]] ; then
            SCM="git"
        fi
    fi
    if [ "${SCM}" == "NONE" ] ; then
        which svn &> /dev/null
        if [[ $? == 0 ]] ; then
            svnOutput=`svn status 2>&1`
            if [[  "$svnOutput" != *"is not a working copy" ]] ; then
                SCM="svn"
            fi
        fi
    fi
    if [ "${SCM}" == "NONE" ] ; then
        echo "The current workspace is not under Source Control (GIT or SVN)"
        exit 1
    fi
}
###############################################################################
prepareSCM() {
    gitOrSvn
    if [ "${DIRTYSCM}" != "true" ] ; then
        if [ "${RESETSCM}" == "true" ] ; then
            if [ "${SCM}" == "git" ] ; then
                git reset --hard HEAD > /dev/null
                git clean -f -d -e $TESTPATCHDIRNAME > /dev/null
            fi
            if [ "${SCM}" == "svn" ] ; then
                svn revert -R . > /dev/null
                svn status | grep "\?" | awk '{print $2}' | xargs rm -rf
            fi
        else
            echo "It should not happen DIRTYSCM=false & RESETSCM=false"
            exit 1
        fi
        echo "Cleaning local ${SCM} workspace" >> ${SUMMARYFILE}
    else
        echo "WARNING: Running test-patch on a dirty local ${SCM} workspace" >> ${SUMMARYFILE}
    fi
}
###############################################################################
prepareTestPatchDirs() {
    mkdir -p ${TESTPATCHDIR} 2> /dev/null
    rm -rf ${REPORTDIR} 2> /dev/null
    rm -rf ${TEMPDIR} 2> /dev/null
    mkdir -p ${TOOLSDIR} 2> /dev/null
    mkdir -p ${TEMPDIR} 2> /dev/null
    mkdir -p ${REPORTDIR} 2> /dev/null
    if [ ! -e "${TESTPATCHDIR}" ] ; then
        echo "Could not create test-patch/ dir"
        exit 1
    fi
}
###############################################################################
updateJira() {
    if [[ "${JIRAUPDATE}" != "" && "${JIRAISSUE}" != "" ]] ; then
        if [[ "$JIRAPASSWORD" != "" ]] ; then
            JIRACLI=${TOOLSDIR}/jira-cli/jira.sh
            if [ ! -e "${JIRACLI}" ] ; then
                curl https://bobswift.atlassian.net/wiki/download/attachments/16285777/jira-cli-2.6.0-distribution.zip > ${TEMPDIR}/jira-cli.zip
                if [ $? != 0 ] ; then
                    echo
                    echo "Could not download jira-cli tool, thus no JIRA updating"
                    echo
                    exit 1
                fi
                mkdir ${TEMPDIR}/jira-cli-tmp
                (cd ${TEMPDIR}/jira-cli-tmp;jar xf ${TEMPDIR}/jira-cli.zip; mv jira-cli-2.6.0 ${TOOLSDIR}/jira-cli)
                chmod u+x ${JIRACLI}
            fi
            echo "Adding comment to JIRA"
            comment=`cat ${SUMMARYFILE}`
            $JIRACLI -s $JIRAURL -a addcomment -u $JIRAUSER -p "$JIRAPASSWORD" --comment "$comment" --issue $JIRAISSUE
            echo
        else
            echo "Skipping JIRA update"
            echo
        fi
    fi
}
###############################################################################
cleanupAndExit() {
    updateJira
    exit $1
}
###############################################################################
printUsage() {
    echo "Usage: $0 <OPTIONS>"
    echo "          (--jira=<JIRA ISSUE> | --patch=<PATCH PATH>)"
    echo "          (--reset-scm | --dirty-scm)"
    echo "          [--tasks=<TASK,...>]"
    echo "          [--skip-tasks=<TASK,...>]"
    echo "          [--jira-cli=<JIRA CLIENT>]"
    echo "          [--jira-user=<JIRA USER>]"
    echo "          [--jira-password=<JIRA PASSWORD>]"
    echo "          [-D<MVN PROPERTY>...]"
    echo "          [-P<MVN PROFILE>...]"
    echo "          [--list-tasks]"
    echo "          [--verbose]"
    echo
}
###############################################################################
parseArgs() {
    for i in $*
    do
        case $i in
        --jira=*)
            JIRAISSUE=${i#*=}
            ;;
        --patch=*)
            PATCHFILE=${i#*=}
            ;;
        --tasks=*)
            TASKSTORUN=${i#*=}
            ;;
        --skip-tasks=*)
            TASKSTOSKIP=${i#*=}
            ;;
        --list-tasks)
            listTasks
            cleanupAndExit 0
            ;;
        --jira-cli=*)
            JIRACLI=${i#*=}
            ;;
        --jira-user=*)
            JIRAUSER=${i#*=}
            ;;
        --jira-password=*)
            JIRAPASSWORD=${i#*=}
            JIRAUPDATE="true"
            ;;
        -D*)
            MVNPASSTHRU="${MVNPASSTHRU} $i"
            ;;
        -P*)
            MVNPASSTHRU="${MVNPASSTHRU} $i"
            ;;
        --reset-scm)
            RESETSCM="true"
            ;;
        --dirty-scm)
            DIRTYSCM="true"
            ;;
        --verbose)
            VERBOSEOPTION="--verbose"
            STDOUT="/dev/stdout"
            ;;
        *)
            echo "Invalid option"
            echo
            printUsage
            exit 1
            ;;
        esac
    done

    if [[ "${JIRAISSUE}" == "" && "${PATCHFILE}" == "" ]] ; then
        echo "Either --jira or --patch option must be specified"
        echo
        printUsage
        exit 1
    fi
    if [[ "${JIRAISSUE}" != "" && "${PATCHFILE}" != "" ]] ; then
        echo "Cannot specify --jira or --patch options together"
        echo
        printUsage
        exit 1
    fi
    if [[ "${RESETSCM}" == "false" && "${DIRTYSCM}" == "false" ]] ; then
        echo "Either --reset-scm or --dirty-scm option must be specified"
        echo
        printUsage
        exit 1
    fi
    if [[ "${RESETSCM}" == "true" && "${DIRTYSCM}" == "true" ]] ; then
        echo "Cannot specify --reset-scm and --dirty-scm options together"
        echo
        printUsage
        exit 1
    fi
}

###############################################################################
listTasks() {
    echo "Available Tasks:"
    echo ""
    getAllTasks
    for taskFile in ${TASKFILES} ; do
        taskName=`bash $taskFile --taskname`
        echo "  $taskName"
    done
    echo
}
###############################################################################
downloadPatch () {
    PATCHFILE=${TEMPDIR}/test.patch
    jiraPage=${TEMPDIR}/jira.txt
    curl "${JIRAURLISSUEPREFIX}${JIRAISSUE}" > ${jiraPage}
    if [[ `grep -c 'Patch Available' ${jiraPage}` == 0 ]] ; then
        echo "$JIRAISSUE is not \"Patch Available\".  Exiting."
        echo
        exit 1
    fi
    relativePatchURL=`grep -o '"/jira/secure/attachment/[0-9]*/[^"]*' ${jiraPage} \
        | grep -v -e 'htm[l]*$' | sort | tail -1 \
        | grep -o '/jira/secure/attachment/[0-9]*/[^"]*'`
    patchURL="${JIRAHOST}${relativePatchURL}"
    patchNum=`echo $patchURL | grep -o '[0-9]*/' | grep -o '[0-9]*'`
    curl ${patchURL} > ${PATCHFILE}
    if [[ $? != 0 ]] ; then
        echo "Could not download patch for ${JIRAISSUE} from ${patchURL}"
        echo
        cleanupAndExit 1
    fi
    PATCHNAME=$(echo $patchURL | sed 's/.*\///g')
    echo "JIRA ${JIRAISSUE}, patch downloaded at `date` from ${patchURL}" 
    echo
    echo "Patch [$PATCHNAME|$patchURL] downloaded at $(date)" >> ${SUMMARYFILE}
    echo "" >> ${SUMMARYFILE}
}
###############################################################################
applyPatch() {
    echo "Applying patch" >> $STDOUT
    echo "" >> $STDOUT
    patch -f -E --dry-run -p0 < ${PATCHFILE} | tee ${REPORTDIR}/APPLY-PATCH.txt \
        >> $STDOUT
    if [[  ${PIPESTATUS[0]} != 0 ]] ; then
        echo "Patch failed to apply to head of branch"
        echo "{color:red}-1{color} Patch failed to apply to head of branch" >> ${SUMMARYFILE}
        echo "" >> ${SUMMARYFILE}
        echo "----------------------------" >> ${SUMMARYFILE}
        echo
        cleanupAndExit 1
    fi
    patch -f -E -p0 < ${PATCHFILE} > ${REPORTDIR}/APPLY-PATCH.txt
    if [[ $? != 0 ]] ; then
        echo "ODD!, dry run passed, but patch failed to apply to head of branch"
        echo
        cleanupAndExit 1
    fi
    echo "" >> $STDOUT
    echo "Patch applied"
    echo "{color:green}+1 PATCH_APPLIES{color}" >> $SUMMARYFILE
    echo
}
###############################################################################
run() {
    task=`bash $1 --taskname`
    if [[ "${TASKSTORUN}" == "" || "${TASKSTORUN}" =~ "${task}" ]] ; then
        if [[ ! "${TASKSTOSKIP}" =~ "${task}" ]] ; then
            echo "  Running test-patch task ${task}"
            outputFile="`basename $1`-$2.out"
            $1 --op=$2 --tempdir=${TEMPDIR} --reportdir=${REPORTDIR} \
                --summaryfile=${SUMMARYFILE} --patchfile=${PATCHFILE} ${MVNPASSTHRU} \
                ${VERBOSEOPTION} | tee ${TEMPDIR}/${outputFile} >> $STDOUT
            if [[ $? != 0 ]] ; then
                echo "  Failure, check for details ${TEMPDIR}/${outputFile}"
                echo
                cleanupAndExit 1
            fi
        fi
    fi
}
###############################################################################
getAllTasks() {
    TASKFILES=`ls -a bin/test\-patch\-[0-9][0-9]\-*`
}
###############################################################################
prePatchRun() {
    echo "Pre patch"
    for taskFile in ${TASKFILES} ; do
        run $taskFile pre
    done
    echo
}
###############################################################################
postPatchRun() {
    echo "Post patch"
    for taskFile in ${TASKFILES} ; do
        run $taskFile post
    done
    echo
}
###############################################################################
createReports() {
    echo "Reports"
    for taskFile in ${TASKFILES} ; do
        run $taskFile report
    done
    echo
}
###############################################################################

echo

parseArgs "$@"

prepareSCM

prepareTestPatchDirs

echo "" > ${SUMMARYFILE}

if [ "${PATCHFILE}" == "" ] ; then
    echo "Testing JIRA ${JIRAISSUE}"
    echo
    echo "Testing JIRA ${JIRAISSUE}" >> ${SUMMARYFILE}
    echo "" >> ${SUMMARYFILE}
else
    if [ ! -e ${PATCHFILE} ] ; then
        echo "Patch file does not exist"
        cleanupAndExit 1
    fi
    echo "Testing patch ${PATCHFILE}"
    echo
    echo "Testing patch ${PATCHFILE}" >> ${SUMMARYFILE}
    echo "" >> ${SUMMARYFILE}
fi

echo "" >> ${SUMMARYFILE}

if [ "${PATCHFILE}" == "" ] ; then
    downloadPatch ${JIRAISSUE}
fi

echo "----------------------------" >> ${SUMMARYFILE}
echo "" >> ${SUMMARYFILE}
getAllTasks
prePatchRun
applyPatch
postPatchRun
createReports
echo "" >> ${SUMMARYFILE}
echo "----------------------------" >> ${SUMMARYFILE}
MINUSONES=`grep -c "\}\-1" ${SUMMARYFILE}`
if [[ $MINUSONES == 0 ]]; then
    echo "{color:green}*+1 Overall result, good!, no -1s*{color}" >> ${SUMMARYFILE}
else
    echo "{color:red}*-1 Overall result, please check the reported -1(s)*{color}" >> ${SUMMARYFILE}
fi
echo "" >> ${SUMMARYFILE}
WARNINGS=`grep -c "\}WARNING" ${SUMMARYFILE}`
if [[ $WARNINGS != 0 ]]; then
    echo "{color:red}.   There is at least one warning, please check{color}" >> ${SUMMARYFILE}
fi
echo "" >> ${SUMMARYFILE}

if [ ! -z "${JIRAISSUE}" ]; then
    echo "The full output of the test-patch run is available at"  >> ${SUMMARYFILE}
    echo ""  >> ${SUMMARYFILE}
    echo ".   ${BUILD_URL}"  >> ${SUMMARYFILE}
    echo ""  >> ${SUMMARYFILE}
else
    echo
    echo "Refer to ${REPORTDIR} for detailed test-patch reports"
    echo
fi

cat ${SUMMARYFILE} | sed -e 's/{color}//' -e 's/{color:green}//' -e 's/{color:red}//' -e 's/^\.//' -e 's/^\*//' -e 's/\*$//' > ${SUMMARYFILETXT}

cat ${SUMMARYFILETXT}

cleanupAndExit `expr $MINUSONES != 0`