#!/usr/bin/env bash

# Copyright Advanced Micro Devices, Inc., or its affiliates.
# SPDX-License-Identifier: MIT

shopt -s globstar

# Expects rocRoller tests to have been built with `-DCODE_COVERAGE=ON -DBUILD_SHARED_LIBS=OFF`

help() {
    echo "Usage: $0 [option...]" >&2
    echo
    echo "NOTE: This script assumes that rocRoller has been built with the following CMake arguments:"
    echo "      -DCODE_COVERAGE=ON -DBUILD_SHARED_LIBS=OFF"
    echo
    echo "options:"
    echo "--skip_codecov  Skip running the tests and collecting code coverage."
    echo "--skip_diff     Skip performing the diff and producing reports."
    echo "--skip_zip      Skip creating the zip archive with the results."
    echo "-b              Absolute path to build directory"
    echo "-g              GPU Identifier (for output file names)"
    echo "-u              Comparison archive URL"
    echo "-h              Print this help message"
    echo
}

skip_diff=false
skip_zip=false
skip_codecov=false

while getopts g:b:u:h:-: flag; do
    case "${flag}" in
    -)
      case "${OPTARG}" in
        skip_codecov)
          skip_codecov=true
          ;;
        skip_diff)
          skip_diff=true
          ;;
        skip_zip)
          skip_zip=true
          ;;
        *)
          echo "Unknown option --${OPTARG}"
          help
          exit 1
          ;;
      esac
      ;;
    g) gpu=${OPTARG} ;;
    b) build_path=${OPTARG} ;; # Absolute path required
    u) masterURL=${OPTARG} ;;
    h)
        help
        exit
        ;;
    \?)
        help
        exit
        ;;
    esac
done

# Require build_path
if [ -z "$build_path" ]; then
    echo 'Missing -b' >&2
    echo
    help
    exit 1
fi

# build_path must be an absolute path to work with ctest
if [ "$build_path" == "${build_path#/}" ]; then
    echo 'Absolute path required for -b'
    echo '(HINT: Try "-b `pwd`" if invoking from your build directory)'
    echo
    help
    exit 1
fi

script_path=$(dirname "$(realpath $0)")
code_cov_path=${build_path}
profdata_file=${code_cov_path}/rocroller-tests.profdata
ignore_patterns="(.*googletest-src.*)|(.*/catch2-src/.*)|(.*/catch2-build/.*)|(.*/yaml-cpp-src/.*)|(.*hip/include.*)|(.*/include/llvm/.*)|(.*/spdlog/.*)|(.*/msgpack-src/.*)|(.*/build/.*)|(.*/test/.*[Tt]ests?.cpp)"

if $skip_codecov; then
  echo "Skipping code coverage..."
else
    set -x
    mkdir -p ${code_cov_path}

    #Remove the prof file from running the generator.
    rm -rf ${build_path}/*.profraw
    rm -rf ${code_cov_path}/*.profraw

    # The `%m` creates a different prof file for each object file. So one for
    # rocroller.so and one for rocroller-tests.
    # Using sharded test runner with codecov profile for better parallelization
    # and centralized test filtering configuration.
    #
    # The codecov profile excludes slow/exhaustive tests to reduce execution time
    # while maintaining good coverage validation (basic tests still run).

    echo Using sharded test runner with codecov profile.
    LLVM_PROFILE_FILE=${code_cov_path}/rocroller-tests_%m.profraw \
        ${script_path}/run-tests-sharded codecov-mci ${build_path}

    # this combines them back together.
    /opt/rocm/lib/llvm/bin/llvm-profdata merge \
        --sparse \
        ${code_cov_path}/*.profraw \
        -o ${profdata_file}

    # For some reason, with the -object flag, we can't just specify the source
    # directory, so we have to filter out the files we don't want.
    /opt/rocm/lib/llvm/bin/llvm-cov report \
        --instr-profile=${profdata_file} \
        --object ${build_path}/test/rocroller-tests \
        --object ${build_path}/test/rocroller-tests-catch \
        --object ${build_path}/test/arch-gen-tests \
        --ignore-filename-regex=${ignore_patterns} >${code_cov_path}/code_cov_${gpu}.report
    cat ${code_cov_path}/code_cov_${gpu}.report

    /opt/rocm/lib/llvm/bin/llvm-cov show \
        --format=html \
        --Xdemangler=/opt/rocm/llvm/bin/llvm-cxxfilt \
        --instr-profile=${profdata_file} \
        --object ${build_path}/test/rocroller-tests \
        --object ${build_path}/test/rocroller-tests-catch \
        --object ${build_path}/test/arch-gen-tests \
        --ignore-filename-regex=${ignore_patterns} \
        --output-dir=${code_cov_path}/code_cov_${gpu}_html

    /opt/rocm/lib/llvm/bin/llvm-cov show \
        --format=text \
        --use-color=false \
        --Xdemangler=/opt/rocm/llvm/bin/llvm-cxxfilt \
        --instr-profile=${profdata_file} \
        --object ${build_path}/test/rocroller-tests \
        --object ${build_path}/test/rocroller-tests-catch \
        --object ${build_path}/test/arch-gen-tests \
        --ignore-filename-regex=${ignore_patterns} \
        --output-dir=${code_cov_path}/code_cov_${gpu}_text

    mkdir ${code_cov_path}/code_cov_${gpu}_text/lib
    mv ${code_cov_path}/code_cov_${gpu}_text/coverage/**/lib/* \
        ${code_cov_path}/code_cov_${gpu}_text/lib/
    rm -rf ${code_cov_path}/code_cov_${gpu}_text/coverage

    if $skip_zip; then
        echo "Skipping zip."
    else
        # zip the text report for archiving.
        pushd ${code_cov_path}
        zip -r ${code_cov_path}/code_cov_${gpu}.zip ./code_cov_${gpu}_text
        popd
    fi
fi

if $skip_diff; then
  echo "Skipping diff..."
else
    # Require archive url
    if [ -z "$masterURL" ]; then
        echo 'Missing -u' >&2
        echo '(HINT: For master try "-u http://math-ci.amd.com/job/enterprise/job/code-coverage/job/rocRoller/job/master/lastSuccessfulBuild/artifact/*zip*/archive.zip")'
        echo
        help
        exit 1
    fi
    set -x
    #========Create Code Coverage Summary:========

    set +e # Don't error out if the url fails to download.
    cd ${build_path}
    wget  -O ./archive.zip ${masterURL}
    rm -rf ./archive
    unzip archive.zip
    set -e

    if [ -f archive/**/code_cov_${gpu}.report ] && [ -f archive/**/code_cov_${gpu}.zip ]; then

        mv archive/**/code_cov_${gpu}.report ./code_cov_${gpu}_master.report

        results=$(tail -n 1 ./code_cov_${gpu}.report | tr -s ' ' | cut -d' ' -f 2-)
        #Get the report artifact from the master branch named ./code_cov_${gpu}_master.report
        master_results=$(tail -n 1 ./code_cov_${gpu}_master.report | tr -s ' ' | cut -d' ' -f 2-)

        regions_total=$(echo $results | cut -d' ' -f 1)
        functions_total=$(echo $results | cut -d' ' -f 4)
        lines_total=$(echo $results | cut -d' ' -f 7)
        branches_total=$(echo $results | cut -d' ' -f 10)

        regions_missed=$(echo $results | cut -d' ' -f 2)
        functions_missed=$(echo $results | cut -d' ' -f 5)
        lines_missed=$(echo $results | cut -d' ' -f 8)
        branches_missed=$(echo $results | cut -d' ' -f 11)

        regions_percent=$(echo $results | cut -d' ' -f 3)
        functions_percent=$(echo $results | cut -d' ' -f 6)
        lines_percent=$(echo $results | cut -d' ' -f 9)
        branches_percent=$(echo $results | cut -d' ' -f 12)

        master_regions_missed=$(echo $master_results | cut -d' ' -f 2)
        master_functions_missed=$(echo $master_results | cut -d' ' -f 5)
        master_lines_missed=$(echo $master_results | cut -d' ' -f 8)
        master_branches_missed=$(echo $master_results | cut -d' ' -f 11)

        master_regions_percent=$(echo $master_results | cut -d' ' -f 3)
        master_functions_percent=$(echo $master_results | cut -d' ' -f 6)
        master_lines_percent=$(echo $master_results | cut -d' ' -f 9)
        master_branches_percent=$(echo $master_results | cut -d' ' -f 12)

        regions_missed_diff=$(echo ${regions_missed} - ${master_regions_missed} | bc)
        functions_missed_diff=$(echo ${functions_missed} - ${master_functions_missed} | bc)
        lines_missed_diff=$(echo ${lines_missed} - ${master_lines_missed} | bc)
        branches_missed_diff=$(echo ${branches_missed} - ${master_branches_missed} | bc)

        regions_percent_diff=$(echo ${regions_percent::-1} - ${master_regions_percent::-1} | bc)
        functions_percent_diff=$(echo ${functions_percent::-1} - ${master_functions_percent::-1} | bc)
        lines_percent_diff=$(echo ${lines_percent::-1} - ${master_lines_percent::-1} | bc)
        branches_percent_diff=$(echo ${branches_percent::-1} - ${master_branches_percent::-1} | bc)

        results=\
"|Type|Total|Missed|Master Missed|Missed Change|Coverage|Master Coverage|Coverage Change|
|:---|---:|---:|---:|---:|---:|---:|---:|
|Lines|$lines_total|$lines_missed|$master_lines_missed|$lines_missed_diff|$lines_percent|$master_lines_percent|$lines_percent_diff%|
|Functions|$functions_total|$functions_missed|$master_functions_missed|$functions_missed_diff|$functions_percent|$master_functions_percent|$functions_percent_diff%|
|Regions|$regions_total|$regions_missed|$master_regions_missed|$regions_missed_diff|$regions_percent|$master_regions_percent|$regions_percent_diff%|
|Branches|$branches_total|$branches_missed|$master_branches_missed|$branches_missed_diff|$branches_percent|$master_branches_percent|$branches_percent_diff%|"

        echo "$results" > code_cov_${gpu}.formatted

        #========Create Code Coverage Diff:========

        mv archive/**/code_cov_${gpu}.zip ./code_cov_${gpu}_master_text.zip
        rm -rf ./code_cov_${gpu}_master_text
        unzip ./code_cov_${gpu}_master_text.zip -d ./code_cov_${gpu}_master_text

        tmpdir=$(mktemp -d)
        #Cleanup copies of the txt report for diff. Keep the originals intact.
        if [ -d ./code_cov_${gpu}_text ]; then
            cp -r ./code_cov_${gpu}_text ${tmpdir}/code_cov_${gpu}_text
            find ${tmpdir}/code_cov_${gpu}_text -name "*.txt" -type f | xargs sed -i -f ../scripts/comparable_cov_report.sed
        fi
        if [ -d ./code_cov_${gpu}_master_text/code_cov_${gpu}_text ]; then
            cp -r ./code_cov_${gpu}_master_text ${tmpdir}/code_cov_${gpu}_master_text
            find ${tmpdir}/code_cov_${gpu}_master_text/code_cov_${gpu}_text -name "*.txt" -type f | xargs sed -i -f ../scripts/comparable_cov_report.sed
        fi

        #Don't exit when there is a diff. And make the file non-empty if there isn't.
        (diff -dur --color=never ${tmpdir}/code_cov_${gpu}_master_text/code_cov_${gpu}_text ${tmpdir}/code_cov_${gpu}_text && echo "No diff") > ./code_cov_${gpu}.diff || true
        wc -l ./code_cov_${gpu}.diff

        if [ -s ./code_cov_${gpu}.diff ]; then
            cat ./code_cov_${gpu}.diff | grep -E "^\\+.*-ZERO-\\|" | wc -l > new_uncovered_lines.txt
        else
            mkdir -p ../python_cov_html
            touch ../python_cov_html/index.html
            mkdir -p ./code_cov_${gpu}_html
            touch ./code_cov_${gpu}_html/index.html
            echo "## Error encountered generating coverage report" > ./code_cov_${gpu}.formatted
            echo "There was an empty ./code_cov_${gpu}.diff." >> ./code_cov_${gpu}.formatted
            echo "0" > new_uncovered_lines.txt
            echo "There was an empty ./code_cov_${gpu}.diff."
        fi
        # TODO: Temporarily disabling code_cov_diff_*.html generation
        touch ./code_cov_diff_${gpu}.html
    else
        mkdir -p ../python_cov_html
        touch ../python_cov_html/index.html
        mkdir -p ./code_cov_${gpu}_html
        touch ./code_cov_${gpu}_html/index.html
        touch ./code_cov_diff_${gpu}.html
        echo "## Error encountered generating coverage report" > ./code_cov_${gpu}.formatted
        echo "Skipped code cov for ${gpu}, no archived code_cov_${gpu}.report found." >> ./code_cov_${gpu}.formatted
        echo "0" > new_uncovered_lines.txt
        echo "Skipped code cov for ${gpu}, no archived code_cov_${gpu}.report found."
    fi
fi