name: "Create PR custom action"
description: "Create a PR and a temporary branch, close duplicates"

# PROCESS
#
# 1. Setup git client using Powertools for AWS Lambda (Python) bot username
# 2. Pushes staged files to a temporary branch
# 3. Creates a PR from temporary branch against a target branch (typically trunk: develop, main, etc.)
# 4. Searches for duplicate PRs with the same title
# 5. If duplicates are found, link to the most recent one, close and delete their branches so we keep a single PR
# 6. In the event of failure, we delete the now orphaned branch (if any), and propagate the failure

# USAGE
#
# - name: Create PR
#   id: create-pr
#   uses: ./.github/actions/create-pr
#   with:
#     files: "CHANGELOG.md"
#     temp_branch_prefix: "ci-changelog"
#     pull_request_title: "chore(ci): changelog rebuild"
#     github_token: ${{ secrets.GITHUB_TOKEN }}
# - name: Step to demonstrate how to access outputs (no need for this)
#   run: |
#     echo "PR number: ${PR_ID}"
#     echo "Branch: ${BRANCH}"
#   env:
#     PR_ID: ${{ steps.create-pr.outputs.pull_request_id}}
#     BRANCH: ${{ steps.create-pr.outputs.temp_branch}}

inputs:
  files:
    description: "Files to add separated by space"
    required: true
  temp_branch_prefix:
    description: "Prefix for temporary git branch to be created, e.g, ci-docs"
    required: true
  pull_request_title:
    description: "Pull Request title to use"
    required: true
  github_token:
    description: "GitHub token for GitHub CLI"
    required: true
  target_branch:
    description: "Branch to target when creating a PR against (develop, by default)"
    required: false
    default: develop

outputs:
  pull_request_id:
    description: "Pull request ID created"
    value: ${{ steps.create-pr.outputs.pull_request_id }}
  temp_branch:
    description: "Temporary branch created with staged changed"
    value: ${{ steps.create-pr.outputs.temp_branch }}

runs:
  using: "composite"
  steps:
    - id: adjust-path
      run: echo "${{ github.action_path }}" >> $GITHUB_PATH
      shell: bash
    - id: setup-git
      name: Git client setup and refresh tip
      run: |
        git config user.name "Powertools for AWS Lambda (Python) bot"
        git config user.email "151832416+aws-powertools-bot@users.noreply.github.com"
        git config pull.rebase true
        git config remote.origin.url >&-
      shell: bash
    - id: create-pr
      working-directory: ${{ env.GITHUB_WORKSPACE }}
      run: create_pr_for_staged_changes.sh "${FILES}"
      env:
        FILES: ${{ inputs.files }}
        TEMP_BRANCH_PREFIX: ${{ inputs.temp_branch_prefix }}
        PR_TITLE: ${{ inputs.pull_request_title }}
        BASE_BRANCH: ${{ inputs.target_branch }}
        GH_TOKEN: ${{ inputs.github_token }}
      shell: bash
    - id: cleanup
      name: Cleanup orphaned branch
      if: failure()
      run: git push origin --delete "${TEMP_BRANCH_PREFIX}-${GITHUB_RUN_ID}" || echo "Must have failed before creating temporary branch; no cleanup needed."
      env:
        TEMP_BRANCH_PREFIX: ${{ inputs.temp_branch_prefix }}
        GITHUB_RUN_ID: ${{ github.run_id }}
      shell: bash