on:
  workflow_call:
    inputs:
      label-format-list:
        description: 'The Regex formats expected for the labels; must be a JSON list'
        default: '[
          ".*"
        ]'
        type: string
        required: false
      label-error-message:
        description: 'Error message to be posted when the labels set don''t match the required list of formats.'
        default: 'At least one label is required.'
        type: string
        required: false
      label-success-message:
        description: 'Message to be posted when the labels set fulfill the entire list of expected formats.'
        default: '✅ Yay, issue looks great!'
        type: string
        required: false
    secrets:
      github-token:
        required: true

concurrency:
  group: danger-${{ github.event.issue.number }}
  cancel-in-progress: true

jobs:
  check-issue-labels:
    runs-on: ubuntu-latest
    permissions:
      issues: write
    steps:
      - name: "🏷️ Check Issue Labels"
        env:
          GITHUB_TOKEN: ${{ secrets.github-token }}
          GH_REPO: ${{ github.repository }}
          ISSUE_NUMBER: ${{ github.event.issue.number }}
          ISSUE_LABELS: ${{ toJSON(github.event.issue.labels.*.name) }}
          LABEL_REGEX_LIST: ${{ inputs.label-format-list }}
          ISSUE_SUCCESS_COMMENT: >
            ${{ inputs.label-success-message }}
            <!-- generated_by_dangermattic -->
          ISSUE_ERROR_COMMENT: >
            ${{ inputs.label-error-message }}
            <!-- generated_by_dangermattic -->
        run: |
          #!/bin/bash

          readarray -t labels < <(echo "$ISSUE_LABELS" | jq -r '.[]')
          readarray -t label_regex_list < <(echo "$LABEL_REGEX_LIST" | jq -r '.[]')

          all_patterns_matched=true

          for regex in "${label_regex_list[@]}"; do
            pattern_matched=false

            for label in "${labels[@]}"; do
              if [[ "$label" =~ $regex ]]; then
                pattern_matched=true
                echo "👍 Match found for regex '$regex': $label"
                break
              fi
            done

            if [ "$pattern_matched" = false ]; then
              all_patterns_matched=false
              echo "⚠️ No match found for regex '$regex'"
            fi
          done

          ISSUE_COMMENT=''
          if [ "$all_patterns_matched" = true ]; then
            echo "✅ All regex patterns have at least one match."
            ISSUE_COMMENT="$ISSUE_SUCCESS_COMMENT"
          else
            echo "❌ Not all regex patterns have at least one match."
            ISSUE_COMMENT="$ISSUE_ERROR_COMMENT"
          fi

          set +e
          echo "✍️ Attempting to edit existing comment on issue $ISSUE_NUMBER, if it exists:"
          gh issue comment $ISSUE_NUMBER --body "$ISSUE_COMMENT" --edit-last
          comment_update_status=$?
          set -e

          if [ $comment_update_status -ne 0 ]; then
            echo "✍️ Adding new comment on issue $ISSUE_NUMBER:"
            gh issue comment $ISSUE_NUMBER --body "$ISSUE_COMMENT"
          fi