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# to you under the Apache License, Version 2.0 (the
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#
#   http://www.apache.org/licenses/LICENSE-2.0
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# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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# specific language governing permissions and limitations
# under the License.

name: Error Prone Analysis

on:
  push:
    branches: [ main, add-errorprone ]
  pull_request:
    branches: [ main, '4.20' ]

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  errorprone:
    runs-on: ubuntu-22.04
    steps:
      - uses: actions/checkout@v4

      - name: Set up JDK 11
        uses: actions/setup-java@v4
        with:
          java-version: '11'
          distribution: 'adopt'
          architecture: x64
          cache: maven

      - name: Run Error Prone Static Analysis (Strict Mode)
        id: errorprone
        run: |
          echo "::group::Error Prone Analysis"
          # Temporarily remove -XepAllErrorsAsWarnings to run in strict mode
          sed -i 's/-Xplugin:ErrorProne -XepAllErrorsAsWarnings/-Xplugin:ErrorProne/g' pom.xml

          set -o pipefail

          # Use -fae (fail-at-end) to build all modules and report failures at the end
          # Run 'test' phase to compile and test all modules
          mvn -fae clean test -T$(nproc) 2>&1 | tee errorprone.log
          MVN_EXIT=${PIPESTATUS[0]}

          echo "mvn_exit=${MVN_EXIT}" >> $GITHUB_OUTPUT
          echo "::endgroup::"

          exit 0
        continue-on-error: true

      - name: Check for Error Prone Issues
        id: check-errors
        run: |
          HAS_ERRORS=false

          if [ "${{ steps.errorprone.outputs.mvn_exit }}" != "0" ]; then
            HAS_ERRORS=true
            echo "Maven build exited with code ${{ steps.errorprone.outputs.mvn_exit }}"
          fi

          if grep -q "error: \[" errorprone.log; then
            HAS_ERRORS=true
          fi

          if grep -q "^\[ERROR\]" errorprone.log; then
            HAS_ERRORS=true
          fi

          if [ "$HAS_ERRORS" = "true" ]; then
            echo "has_errors=true" >> $GITHUB_OUTPUT
            echo "::error::Error Prone and/or compilation issues found in the code"
            echo ""
            echo "=== Error Prone Issues ==="
            grep -n "error: \[" errorprone.log | head -50 || echo "No Error Prone specific issues"
            echo ""
            echo "=== Maven [ERROR] Lines ==="
            grep -n "^\[ERROR\]" errorprone.log | head -50 || echo "No Maven errors"
            echo ""

            echo "## ⚠️ Error Prone Analysis Failed" >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "Error Prone static analysis and/or compilation detected issues in this PR." >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "### Error Prone Issues (first 50):" >> $GITHUB_STEP_SUMMARY
            echo '```' >> $GITHUB_STEP_SUMMARY
            grep -n "error: \[" errorprone.log | head -50 >> $GITHUB_STEP_SUMMARY || echo "None" >> $GITHUB_STEP_SUMMARY
            echo '```' >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "### Maven Compilation Errors (first 50):" >> $GITHUB_STEP_SUMMARY
            echo '```' >> $GITHUB_STEP_SUMMARY
            grep -n "^\[ERROR\]" errorprone.log | head -50 >> $GITHUB_STEP_SUMMARY || echo "None" >> $GITHUB_STEP_SUMMARY
            echo '```' >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "See the [Error Prone documentation](https://errorprone.info/) for details on each bug pattern." >> $GITHUB_STEP_SUMMARY
          else
            echo "has_errors=false" >> $GITHUB_OUTPUT
            echo "✅ No Error Prone issues found"

            echo "## ✅ Error Prone Analysis Passed" >> $GITHUB_STEP_SUMMARY
            echo "" >> $GITHUB_STEP_SUMMARY
            echo "No issues detected by Error Prone static analysis." >> $GITHUB_STEP_SUMMARY
          fi

      - name: Fail if errors found
        if: steps.check-errors.outputs.has_errors == 'true'
        run: exit 1