# This workflow helps to keep configuration files for such tools as ESLint and Prettier in your repo up to date with the reference configuration files from the actions/reusable-workflows repository.
# Once the reference configuration files are changed in the https://github.com/actions/reusable-workflows/tree/main/reusable-configurations, the workflow will automatically create PR with updates in your repo.

name: Update configuration files

on:
  workflow_call:
    inputs:
      base-pr-branch:
        description: "Optional input to specify the branch where PR changes should be integrated."
        required: false
        type: string
        default: "main"
      head-pr-branch:
        description: "Optional input to specify the branch where PR changes should be made."
        required: false
        type: string
        default: "tool-config-auto-update"
      target-folder:
        description: "Optional input to set a relative path to a folder where updated configuration files should be placed."
        required: false
        type: string
        default: "./"
      reference-files:
        description: "Optional input to specify which files should be used as references. Files can be supplied in comma-separated format, wildcards are supported."
        required: false
        type: string
        default: "*"

jobs:
  update-configuration-files:
    runs-on: "ubuntu-latest"
    steps:
      - name: Checkout ${{github.repository}} repository
        uses: actions/checkout@v4
        with:
          ref: "${{inputs.base-pr-branch}}"
          path: "target"

      - name: Checkout actions/reusable-workflows repository
        uses: actions/checkout@v4
        with:
          repository: "actions/reusable-workflows"
          ref: "main"
          path: "source"

      - name: Configure git service account
        run: |
          git config --global user.name 'github-actions[bot]'
          git config --global user.email 'github-actions[bot]@users.noreply.github.com'

      - name: Update configuration files
        working-directory: ./target
        id: successful-update
        run: |
          if [ ! -d "${{inputs.target-folder}}" ]; then
            echo "::error::Directory: '${{inputs.target-folder}}' supplied to the 'target-folder' input does not exist in the ${{github.repository}} repository on the branch: ${{inputs.base-pr-branch}}."
            exit 1
          fi

          git checkout -b ${{inputs.head-pr-branch}}

          filePatterns="${{inputs.reference-files}}"
          mapfile -td ',' arrOfFilePatterns < <(echo -n "${filePatterns//, /,}")

          for filePattern in "${arrOfFilePatterns[@]}"; do
            if [ "$(find ${{github.workspace}}/source/reusable-configurations -name "$filePattern")" ]; then
              rsync -a --include="$filePattern" --exclude="*" ${{github.workspace}}/source/reusable-configurations/ ${{github.workspace}}/target/${{inputs.target-folder}}
            else
              echo "::error::Files corresponding to the specified file pattern: '$filePattern' do not exist in the reference https://github.com/actions/reusable-workflows/tree/main/reusable-configurations folder."
              exit 1
            fi
          done

          git add .

          if [ "$(git diff --ignore-space-at-eol --staged ${{github.workspace}}/target/${{inputs.target-folder}} | wc -l)" -gt "0" ]; then
            echo "Configuration files update is successful."
            echo "STATUS=true" >> $GITHUB_OUTPUT
          else
            echo "::notice::Referenced configuration files are up to date with the files from https://github.com/actions/reusable-workflows/tree/main/reusable-configurations folder."
            echo "STATUS=false" >> $GITHUB_OUTPUT
          fi

      - name: Install Node.js
        if: ${{ steps.successful-update.outputs.STATUS == 'true' }}
        uses: actions/setup-node@v4
        with:
          node-version: 20

      - name: Install dependencies
        if: ${{ steps.successful-update.outputs.STATUS == 'true' }}
        working-directory: ./target
        continue-on-error: true
        run: npm ci

      - name: Automatically apply the updated configuration files
        if: ${{ steps.successful-update.outputs.STATUS == 'true' }}
        working-directory: ./target
        id: automatic-apply
        continue-on-error: true
        run: |
          npm run format; npm run lint:fix

      - name: Create commit and push changes to ${{github.repository}}
        if: ${{ steps.successful-update.outputs.STATUS == 'true' }}
        working-directory: ./target
        run: |
          git add .
          git commit -m "Update configuration files" --no-verify
          git push origin ${{inputs.head-pr-branch}} -f --no-verify

      - name: Check PR existence
        if: ${{ steps.successful-update.outputs.STATUS == 'true' }}
        id: pr-existence
        run: |
          response=$(curl \
            --no-progress-meter \
            -H "Accept: application/vnd.github+json" \
            -H "Authorization: Bearer ${{github.token}}" \
            -H "X-GitHub-Api-Version: 2022-11-28" \
            https://api.github.com/repos/${{github.repository}}/pulls?head=${{github.repository_owner}}:${{inputs.head-pr-branch}}&base=${{inputs.base-pr-branch}})

          if [ "$( echo "$response" | jq length)" != "0" ]; then
            prNumber=$( echo "$response" | jq -r '.[0].number' )
            echo "STATUS=true" >> $GITHUB_OUTPUT
            echo "PR_NUMBER=$prNumber" >> $GITHUB_OUTPUT
            echo "Existed PR №$prNumber with configuration files update is found in the ${{github.repository}} repository."
          else
            echo "STATUS=false" >> $GITHUB_OUTPUT
            echo "Existed PR with configuration files update is not found in the ${{github.repository}} repository."
          fi

      - name: Create/update pull request
        if: ${{ steps.successful-update.outputs.STATUS == 'true' }}
        run: |
          if [ "${{ steps.automatic-apply.outcome }}" == "success" ]; then
            bodyText=$'In the scope of this PR, configuration files should be updated to match examples stored in the '"[reusable-workflows](https://github.com/actions/reusable-workflows/tree/main/reusable-configurations)"' repository. The updated configuration files are applied to the repository files automatically.'
          else
            bodyText=$'In the scope of this PR, configuration files should be updated to match examples stored in the '"[reusable-workflows](https://github.com/actions/reusable-workflows/tree/main/reusable-configurations)"' repository.\n>**Warning**\n> The updated configuration files can not be applied to the repository automatically. Please apply the updated configuration files to the repository manually.'
          fi

          if [ "${{ steps.pr-existence.outputs.STATUS }}" == "true" ]; then
            echo "::group::GitHub API response"
              curl \
              --no-progress-meter \
              -X PATCH \
              -H "Accept: application/vnd.github+json" \
              -H "Authorization: Bearer ${{github.token}}" \
              -H "X-GitHub-Api-Version: 2022-11-28" \
              https://api.github.com/repos/${{github.repository}}/pulls/${{ steps.pr-existence.outputs.PR_NUMBER }} \
              -d '{"title":"'"Automatic update of configuration files from $(date +'%m/%d/%Y')"'","body":"'"$bodyText"'","state":"open","base":"${{inputs.base-pr-branch}}"}'
              echo "::endgroup::"
            echo "PR №${{ steps.pr-existence.outputs.PR_NUMBER }} in the ${{ github.repository }} repository is successfully updated."
          else
            echo "::group::GitHub API response"
              curl \
              --no-progress-meter \
              -X POST \
              -H "Accept: application/vnd.github+json" \
              -H "Authorization: Bearer ${{github.token}}" \
              -H "X-GitHub-Api-Version: 2022-11-28" \
              https://api.github.com/repos/${{github.repository}}/pulls \
              -d '{"title":"'"Automatic update of configuration files from $(date +'%m/%d/%Y')"'","body":"'"$bodyText"'","head":"${{inputs.head-pr-branch}}","base":"${{inputs.base-pr-branch}}"}'
            echo "::endgroup::"
            echo "PR is successfully created in the ${{ github.repository }} repository"
          fi