name: 'Tools: Check Changelog'

on:
  pull_request:
    types:
      - 'opened'
      - 'synchronize'
      - 'reopened'
      - 'labeled'
      - 'unlabeled'
    branches:
      - 'master'
      - 'v5.*'

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

jobs:
  check-changelog:
    if: contains(github.event.pull_request.labels.*.name, 'no-changelog') == false
    runs-on: ubuntu-latest
    timeout-minutes: 15
    permissions:
      contents: read
      pull-requests: write
    env:
      MONITORED_FOLDERS: 'api ui prowler mcp_server'

    steps:
      - name: Checkout repository
        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
        with:
          fetch-depth: 0

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@24d32ffd492484c1d75e0c0b894501ddb9d30d62 # v47.0.0
        with:
          files: |
            api/**
            ui/**
            prowler/**
            mcp_server/**

      - name: Check for folder changes and changelog presence
        id: check-folders
        run: |
          missing_changelogs=""

          # Check api folder
          if [[ "${{ steps.changed-files.outputs.any_changed }}" == "true" ]]; then
            for folder in $MONITORED_FOLDERS; do
              # Get files changed in this folder
              changed_in_folder=$(echo "${{ steps.changed-files.outputs.all_changed_files }}" | tr ' ' '\n' | grep "^${folder}/" || true)

              if [ -n "$changed_in_folder" ]; then
                echo "Detected changes in ${folder}/"

                # Check if CHANGELOG.md was updated
                if ! echo "$changed_in_folder" | grep -q "^${folder}/CHANGELOG.md$"; then
                  echo "No changelog update found for ${folder}/"
                  missing_changelogs="${missing_changelogs}- \`${folder}\`"$'\n'
                fi
              fi
            done
          fi

          {
            echo "missing_changelogs<<EOF"
            echo -e "${missing_changelogs}"
            echo "EOF"
          } >> $GITHUB_OUTPUT

      - name: Find existing changelog comment
        if: github.event.pull_request.head.repo.full_name == github.repository
        id: find-comment
        uses: peter-evans/find-comment@b30e6a3c0ed37e7c023ccd3f1db5c6c0b0c23aad # v4.0.0
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-author: 'github-actions[bot]'
          body-includes: '<!-- changelog-check -->'

      - name: Update PR comment with changelog status
        if: github.event.pull_request.head.repo.full_name == github.repository
        uses: peter-evans/create-or-update-comment@71345be0265236311c031f5c7866368bd1eff043 # v4.0.0
        with:
          issue-number: ${{ github.event.pull_request.number }}
          comment-id: ${{ steps.find-comment.outputs.comment-id }}
          edit-mode: replace
          body: |
            <!-- changelog-check -->
            ${{ steps.check-folders.outputs.missing_changelogs != '' && format('⚠️ **Changes detected in the following folders without a corresponding update to the `CHANGELOG.md`:**

            {0}

            Please add an entry to the corresponding `CHANGELOG.md` file to maintain a clear history of changes.', steps.check-folders.outputs.missing_changelogs) || '✅ All necessary `CHANGELOG.md` files have been updated.' }}

      - name: Fail if changelog is missing
        if: steps.check-folders.outputs.missing_changelogs != ''
        run: |
          echo "::error::Missing changelog updates in some folders"
          exit 1