# Copyright (C) 2022 Sebastian Thomschke and contributors
# SPDX-License-Identifier: AGPL-3.0-or-later
#
# https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions
name: Update Python Dependencies

on:
  schedule:
    # https://docs.github.com/en/free-pro-team@latest/actions/reference/events-that-trigger-workflows
    - cron: '0 5 * * *' # daily at 5 a.m.
  workflow_dispatch:
    # https://github.blog/changelog/2020-07-06-github-actions-manual-triggers-with-workflow_dispatch/

defaults:
  run:
    shell: bash

env:
  PYTHON_VERSION: "3.12"

jobs:

  ###########################################################
  update-python-deps:
  ###########################################################
    runs-on: ubuntu-latest

    steps:

    - name: Generate GitHub Access Token
      uses: tibdex/github-app-token@v2 #https://github.com/tibdex/github-app-token
      id: generate_token
      # see https://github.com/peter-evans/create-pull-request/blob/main/docs/concepts-guidelines.md#authenticating-with-github-app-generated-tokens
      with:
        # see https://github.com/organizations/Second-Hand-Friends/settings/apps/kleinanzeigen-bot-tu
        app_id: ${{ secrets.DEPS_UPDATER_APP_ID }}
        private_key: ${{ secrets.DEPS_UPDATER_PRIVATE_KEY }}

    - name: Git Checkout
      uses: actions/checkout@v4 # https://github.com/actions/checkout
      with:
        token: ${{ steps.generate_token.outputs.token }}

    - uses: actions/setup-python@v4
      with:
        python-version: "${{ env.PYTHON_VERSION }}"

    - name: Install Python dependencies
      run: |
        set -eux

        python --version

        python -m pip install --upgrade pip

        # pin packaging to 21.3 for now to prevent: packaging.specifiers.InvalidSpecifier: Invalid specifier: '>=3.4.*'
        # see https://github.com/pdm-project/pdm/issues/1556
        pip install --upgrade pdm packaging==21.3

        # https://github.com/pdm-project/pdm/issues/728#issuecomment-1021771200
        pip install -t __pypackages__/${{ env.PYTHON_VERSION }}/lib selenium

        pdm install -v

    - name: Update Python Dependencies 
      id: update_deps
      run: |
        set -euo pipefail

        exec 5>&1
        updates=$(pdm update --update-all 2>&1 |tee /dev/fd/5)

        if git diff --exit-code pdm.lock; then
          echo "updates=" >> "$GITHUB_OUTPUT"
        else
          # https://github.com/orgs/community/discussions/26288#discussioncomment-3876281
          delimiter="$(openssl rand -hex 8)"
          echo "updates<<${delimiter}" >> "${GITHUB_OUTPUT}"
          echo "$(echo "$updates" | grep Update | grep -v kleinanzeigen-bot)" >> "${GITHUB_OUTPUT}"
          echo "${delimiter}" >> "${GITHUB_OUTPUT}"
        fi

    - name: Create PR
      id: create-pr
      uses: peter-evans/create-pull-request@v5 # https://github.com/peter-evans/create-pull-request
      if: "${{ steps.update_deps.outputs.updates != '' }}"
      with:
        title: "chore: Update Python dependencies"
        author: "github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>"
        committer: "github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>"
        commit-message: "chore: Update Python dependencies"
        body: ${{ steps.update_deps.outputs.updates }}
        add-paths: pdm.lock
        branch: dependencies/pdm
        delete-branch: true
        token: ${{ steps.generate_token.outputs.token }}