name: SDLC / Label PR
run-name: Label PR ${{ github.event.pull_request.number || inputs.pr-number }}${{ github.event_name == 'workflow_dispatch' && format(' / mode "{0}" dry-run "{1}"', inputs.mode, inputs.dry-run) || '' }}
on:
  pull_request:
    types: [opened, synchronize]
  workflow_dispatch:
    inputs:
      pr-number:
        description: "Pull Request Number"
        required: true
        type: number
      mode:
        description: "Labeling Mode"
        type: choice
        options:
          - add
          - replace
        default: add
      dry-run:
        description: "Dry Run - Don't apply labels"
        type: boolean
        default: false

env:
  _PR_NUMBER: ${{ github.event.pull_request.number || inputs.pr-number }}

jobs:
  label-pr:
    name: Label PR by Changed Files
    runs-on: ubuntu-24.04
    permissions:
      pull-requests: write # required to update labels
      contents: read

    steps:
      - name: Check out repository
        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
        with:
          persist-credentials: false

      - name: Determine label mode for Pull Request
        id: label-mode
        env:
          GH_TOKEN: ${{ github.token }}
          _PR_USER: ${{ github.event.pull_request.user.login }}
          _IS_FORK: ${{ github.event.pull_request.head.repo.fork }}
        run: |
          # Support workflow_dispatch testing by retrieving PR data
          if [ -z "$_PR_USER" ]; then
            echo "👀 PR User is empty, retrieving PR data for PR #$_PR_NUMBER..."
            PR_DATA=$(gh pr view "$_PR_NUMBER" --json author,isCrossRepository)
            _PR_USER=$(echo "$PR_DATA" | jq -r '.author.login')
            _IS_FORK=$(echo "$PR_DATA" | jq -r '.isCrossRepository')
          fi

          echo "📋 PR User: $_PR_USER"
          echo "📋 Is Fork: $_IS_FORK"

          # Handle PRs with labels set by other automations by adding instead of replacing
          if [ "$_IS_FORK" = "true" ]; then
            echo "➡️ Fork PR ($_PR_USER). Label mode: --add"
            echo "label_mode=--add" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          if [[ "$_PR_USER" == app/* || "$_PR_USER" == *\[bot\] ]]; then
            echo "➡️ Bot PR ($_PR_USER). Label mode: --add"
            echo "label_mode=--add" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          echo "➡️ Normal PR. Label mode: --replace"
          echo "label_mode=--replace" >> "$GITHUB_OUTPUT"

      - name: Label PR based on changed files
        env:
          GH_TOKEN: ${{ github.token }}
          _LABEL_MODE: ${{ inputs.mode && format('--{0}', inputs.mode) || steps.label-mode.outputs.label_mode }}
          _DRY_RUN: ${{ inputs.dry-run == true && '--dry-run' || '' }}
          _PR_LABELS: ${{ toJSON(github.event.pull_request.labels) }}
        run: |
          if [ -z "$_PR_LABELS" ] || [ "$_PR_LABELS" = "null" ] || [ "$_PR_LABELS" = "[]" ]; then
            echo "🔍 No current PR labels found, retrieving PR data for PR #$_PR_NUMBER..."
            _PR_LABELS=$(gh pr view "$_PR_NUMBER" --json labels --jq '.labels')
          fi
          echo "🔍 Labeling PR #$_PR_NUMBER with mode: \"$_LABEL_MODE\" and dry-run: \"$_DRY_RUN\" and current PR labels: \"$_PR_LABELS\"..."
          echo "🐍 Running label-pr.py script..."
          echo ""
          python3 .github/scripts/label-pr.py "$_PR_NUMBER" "$_PR_LABELS" "$_LABEL_MODE" "$_DRY_RUN"