#!/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

TASKNAME="TESTS"
OP=""
TEMPDIR=""
REPORTDIR=""
SUMMARYFILE=""
SUMMARYFILEFULL=""
STDOUT="/dev/null"
MVNPASSTHRU=""
FLAKY_LIMIT=10
TIMEOUT_MSG="There was a timeout or other error in the fork"
TEST_FAILURE_PER_PROJECT=5

###############################################################################
cleanupAndExit() {
  exit "$1"
}

printUsage() {
  echo "Usage: $0 --taskname | (--op=pre|post|report --tempdir=<TEMP DIR> --reportdir=<REPORT DIR> --summaryfile=<SUMMARY FILE> --summaryfile-full=<FULL SUMMARY FILE>) [--verbose] [-D<VALUE>...] [-P<VALUE>...]"
  echo
}

parseArgs() {
  for i in "$@"
  do
    case $i in
    --taskname)
      echo ${TASKNAME}
      exit 0
      ;;
    --op=*)
      OP=${i#*=}
      ;;
    --tempdir=*)
      TEMPDIR=${i#*=}
      TESTS_OUT="${TEMPDIR}/${TASKNAME}.out"
      TEST_RESULTS_DIR="${TEMPDIR}/${TASKNAME}/results"
      ;;
    --reportdir=*)
      REPORTDIR=${i#*=}
      ;;
    --summaryfile=*)
      SUMMARYFILE=${i#*=}
      ;;
    --summaryfile-full=*)
      SUMMARYFILEFULL=${i#*=}
      ;;
     --verbose)
      STDOUT="/dev/stdout"
      ;;
    -D*)
      MVNPASSTHRU="${MVNPASSTHRU} $i"
      ;;
    -P*)
      MVNPASSTHRU="${MVNPASSTHRU} $i"
      ;;
    esac
  done
  if [[ "${TASKNAME}" == "" || "${OP}" == "" || "${TEMPDIR}" == "" || "${REPORTDIR}" == "" || "${SUMMARYFILE}" == "" ]] ; 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
}

count_test_result_type() {
  local type=$1
  local path=$2
  find "${path}" -name "TEST-*.xml" -exec sh -c 'xmllint --xpath "string(//testsuite/@'"${type}"')" $1; echo' _ {} \; \
  |  awk 'BEGIN {count=0} {count=count+$1} END {print count}';
}

run_tests() {
  export MAVEN_OPTS="${MVNPASSTHRU} \
        -Dmaven.test.failure.ignore=true \
        -Doozie.test.waitfor.ratio=3 \
        -Dtest.timeout=7200 \
        -Dsurefire.rerunFailingTestsCount=1 \
        ${MAVEN_OPTS}"
  mvn test -fae | tee "${TESTS_OUT}" >> "$STDOUT"
  local exitCode=${PIPESTATUS[0]}

  grep -b1 -e "Run .: PASS" "${TESTS_OUT}" | grep Test | cut -d':' -f2 \
  | awk '{print $1}' > "${TEMPDIR}/${TASKNAME}.flakies.out"

  if [ "${PIPESTATUS[0]}" -eq "0" ]; then
    isTestsFlaky=1
    sed -i -e "s/\./#/g" "${TEMPDIR}/${TASKNAME}.flakies.out"
  else
    isTestsFlaky=0
  fi

  if [ "${isTestsFlaky}" -eq "1" ]; then
    echo "There are flaky tests."
  else
    rm "${TEMPDIR}/${TASKNAME}.flakies.out"

    if [ "${exitCode}" -eq 0 ]; then
      echo "All tests passed."
    else
      echo "Tests failed."
    fi
  fi

  echo "$exitCode" >  "${TEMPDIR}/${TASKNAME}.exitCode"
}

save_failures() {
    if [ ! -d "$TEST_RESULTS_DIR" ]; then
      mkdir -p "${TEST_RESULTS_DIR}"
    fi

    rsync -qR $(find . -name  'TEST*.xml' ! -path '*/test-patch/*' -print0 | xargs -0 grep -El '<error|<failure') "${TEST_RESULTS_DIR}"
}

print_flakies() {
  if [ -f "${TEMPDIR}/${TASKNAME}.flakies.out" ]; then
    echo ".    {color:orange}Tests failed at first run:{color}"
    local limit="${1}"
    if [ -n "${limit}" ]; then
      cat "${TEMPDIR}/${TASKNAME}.flakies.out" | head -"${limit}"
      echo ".    For the complete list of flaky tests, see TEST-SUMMARY-FULL files."
    else
      cat "${TEMPDIR}/${TASKNAME}.flakies.out"
    fi
  fi
}

print_flakies_short() {
  print_flakies "${FLAKY_LIMIT}"
}

print_flakies_full() {
  print_flakies
}

printTestFailures() {
    failurePattern=$1
    failureType=$2

    for path in "${TEST_RESULTS_DIR}"/* ; do
        [ -d "${path}" ] || continue # if not a directory, skip
        module="$(basename "${path}")"
        totalFailedTestsInModule=$(count_test_result_type "$failureType" "$path")
        if [[ ${totalFailedTestsInModule} != 0 ]] ; then
            echo "{color:red}-1{color} [ERROR] There are [${totalFailedTestsInModule}] test ${failureType} in [${module}]. Listing only the first [${TEST_FAILURE_PER_PROJECT}] ones"
            failures=$(find "${path}" -name 'TEST*.xml'  -print0 | xargs grep -hB1 "${failurePattern}" | grep -Evm"${TEST_FAILURE_PER_PROJECT}" "${failurePattern}|--" | cut -d \" -f4,2 | sed 's/"/:/g' )
            echo "${failures}"
        fi
    done
}

generate_report() {
    testsRun=$(grep "Tests run:" "${TESTS_OUT}" | grep -v " Time elapsed:" | awk '{print $4}' | sed 's/,//' | awk 'BEGIN {count=0} {count=count+$1} END {print count}')
    testsFailed=$(count_test_result_type failures "${TEST_RESULTS_DIR}")
    testsErrors=$(count_test_result_type errors "${TEST_RESULTS_DIR}")
    timeout=$(grep -c "${TIMEOUT_MSG}" "${TESTS_OUT}")
    hasFailures=$((testsFailed + testsErrors + timeout))
    testsExitCode=$(cat "${TEMPDIR}/${TASKNAME}.exitCode")

    if [[ ${hasFailures} != 0 ]] ; then
        echo "{color:red}-1 ${TASKNAME}{color}"
        echo ".    Tests run        : $testsRun"
        echo ".    Tests failed     : $testsFailed"
        echo ".    Tests in error   : $testsErrors"
        echo ".    Tests timed out  : $timeout"
        echo ""
        if [[ ${testsFailed} != 0 ]] ; then
            printTestFailures "<failure" failures
            echo ""
        fi
        if [[ ${testsErrors} != 0 ]] ; then
            printTestFailures "<error" errors
            echo ""
        fi
        echo "Check console output for the full list of errors/failures"
    else
        if [[ "${testsExitCode}" != "0" ]] ; then
            echo "{color:red}-1 ${TASKNAME}{color} - patch does not compile, cannot run test cases"
        else
            echo "{color:green}+1 ${TASKNAME}{color}"
            echo ".    Tests run: $testsRun"
        fi
    fi
}
###############################################################################

parseArgs "$@"

case $OP in
  pre)
    ;;
  post)
    run_tests
    save_failures
    ;;
  report)
    generate_report >> "${SUMMARYFILE}"
    print_flakies_short >> "${SUMMARYFILE}"
    print_flakies_full >> "${SUMMARYFILEFULL}"
    ;;
esac

exit 0