name: Manage labels based on PR body

on:
  pull_request_target:
    types: [opened, edited, reopened, synchronize]

jobs:
  manage-labels:
    runs-on: ubuntu-latest
    steps:
      - name: Analyze PR Body and manage labels
        shell: bash
        run: |
          body=$(jq -r '.pull_request.body' "$GITHUB_EVENT_PATH")
          labels_to_add=()
          labels_to_remove=()
          declare -A label_checks=(
            ["New feature"]="enhancement"
            ["Bug fix|Hotfix|Security patch"]="bug"
            ["Documentation update"]="documentation"
            ["Refactoring"]="refactor"
            ["UI/UX improvement"]="UI/UX"
          )
          for pattern in "${!label_checks[@]}"; do
            label="${label_checks[$pattern]}"
            if echo "$body" | grep -Eq "\- \[x\] ($pattern)"; then
              labels_to_add+=("$label")
            else
              labels_to_remove+=("$label")
            fi
          done

          echo "LABELS_TO_ADD=$(IFS=,; echo "${labels_to_add[*]}")" >> $GITHUB_ENV
          echo "LABELS_TO_REMOVE=$(IFS=,; echo "${labels_to_remove[*]}")" >> $GITHUB_ENV

      - name: Add labels if necessary
        if: env.LABELS_TO_ADD != ''
        run: |
          IFS=',' read -ra labels <<< "${LABELS_TO_ADD}"
          for label in "${labels[@]}"; do
            curl -s -X POST \
              -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github.v3+json" \
              -d "{\"labels\": [\"$label\"]}" \
              https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels
          done
      - name: Remove labels if necessary
        if: env.LABELS_TO_REMOVE != ''
        run: |
          IFS=',' read -ra labels <<< "${LABELS_TO_REMOVE}"
          for label in "${labels[@]}"; do
            curl -s -X DELETE \
              -H "Authorization: token ${{ secrets.GITHUB_TOKEN }}" \
              -H "Accept: application/vnd.github.v3+json" \
              https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels/$label
          done