name: Detect PR Pipeline Type

on:
  pull_request:
    branches: [main, dev, uat]
  workflow_call:

permissions:
  contents: read
  pull-requests: write

jobs:
  detect-pipeline:
    runs-on: runners-privilegedescalation
    timeout-minutes: 5
    outputs:
      pipeline-type: ${{ steps.detect.outputs.pipeline-type }}

    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          fetch-depth: 0

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v44
        with:
          files_separator: '\n'

      - name: Detect pipeline type
        id: detect
        run: |
          echo "Changed files:"
          echo "${{ steps.changed-files.outputs.all_changed_files }}"

          pipeline="pipeline-a"

          if [ -n "${{ steps.changed-files.outputs.all_changed_files }}" ]; then
            all_infra=true
            while IFS= read -r file; do
              filename=$(basename "$file")
              dirname=$(dirname "$file")

              if [ "$dirname" = ".github" ] || \
                 [[ "$filename" == *.md ]] || \
                 [[ "$filename" == .eslintrc* ]] || \
                 [[ "$filename" == .prettierrc* ]] || \
                 [[ "$filename" == renovate.json* ]] || \
                 [[ "$filename" == .gitignore ]] || \
                 [[ "$filename" == .editorconfig ]] || \
                 [[ "$filename" == LICENSE ]]; then
                continue
              else
                all_infra=false
                echo "Non-infra file found: $file"
                break
              fi
            done <<< "${{ steps.changed-files.outputs.all_changed_files }}"

            if [ "$all_infra" = true ]; then
              pipeline="pipeline-b"
            fi
          fi

          echo "pipeline-type=$pipeline" >> $GITHUB_OUTPUT
          echo "Detected pipeline: $pipeline"

      - name: Set PR label
        if: github.event_name == 'pull_request'
        env:
          GH_TOKEN: ${{ github.token }}
          REPO: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.pull_request.number }}
          PIPELINE_TYPE: ${{ steps.detect.outputs.pipeline-type }}
        run: |
          curl -sf \
            -X POST \
            -H "Authorization: Bearer ${GH_TOKEN}" \
            -H "Accept: application/vnd.github.v3+json" \
            "https://api.github.com/repos/${REPO}/issues/${PR_NUMBER}/labels" \
            -d "{\"labels\":[\"${PIPELINE_TYPE}\"]}"