name: Release - RC automation
on:
  push:
    branches:
      # Catches release-polkadot-v1.2.3, release-v1.2.3-rc1, etc
      - release-v[0-9]+.[0-9]+.[0-9]+*
      - release-cumulus-v[0-9]+*
      - release-polkadot-v[0-9]+*

  workflow_dispatch:

jobs:
  tag_rc:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        channel:
          - name: "RelEng: Polkadot Release Coordination"
            room: '!cqAmzdIcbOFwrdrubV:parity.io'
    environment: release

    steps:
      - name: Checkout sources
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
        with:
          fetch-depth: 0

      - name: Get release product
        id: get_rel_product
        shell: bash
        run: |
          current_branch=$(git branch --show-current)
          echo "Current branch: $current_branch"
          if [[ "$current_branch" =~ "release-polkadot" ]]; then
            echo "product=polkadot" >> $GITHUB_OUTPUT
          elif [[ "$current_branch" =~ "release-cumulus" ]]; then
            echo "product=polkadot-parachain" >> $GITHUB_OUTPUT
          fi


      - name: Compute next rc tag for polkadot
        if: ${{ steps.get_rel_product.outputs.product == 'polkadot' }}
        id: compute_tag_polkadot
        shell: bash
        run: |
          . ./.github/scripts/common/lib.sh

          # Get last rc tag if exists, else set it to {version}-rc1
          version=$(get_version_from_ghref ${GITHUB_REF})
          echo "$version"
          echo "version=$version" >> $GITHUB_OUTPUT

          last_rc=$(get_latest_rc_tag $version polkadot)

          if [ -n "$last_rc" ]; then
            suffix=$(increment_rc_tag $last_rc)
            echo "new_tag=$version-rc$suffix" >> $GITHUB_OUTPUT
            echo "first_rc=false" >> $GITHUB_OUTPUT
          else
            echo "new_tag=$version-rc1" >> $GITHUB_OUTPUT
            echo "first_rc=true" >> $GITHUB_OUTPUT
          fi

      - name: Compute next rc tag for polkadot-parachain
        if: ${{ steps.get_rel_product.outputs.product == 'polkadot-parachain' }}
        id: compute_tag_cumulus
        shell: bash
        run: |
          . ./.github/scripts/common/lib.sh

          # Get last rc tag if exists, else set it to polkadot-parachains-{version}-rc1
          version=$(get_version_from_ghref ${GITHUB_REF})
          echo "$version"
          echo "version=$version" >> $GITHUB_OUTPUT

          last_rc=$(get_latest_rc_tag $version polkadot-parachain)
          if [ -n "$last_rc" ]; then
            suffix=$(increment_rc_tag $last_rc)
            echo "new_tag=polkadot-parachains-$version-rc$suffix" >> $GITHUB_OUTPUT
            echo "first_rc=false" >> $GITHUB_OUTPUT
          else
            echo "new_tag=polkadot-parachain-$version-rc1" >> $GITHUB_OUTPUT
            echo "first_rc=true" >> $GITHUB_OUTPUT
          fi

      - name: Apply new tag
        uses: tvdias/github-tagger@ed7350546e3e503b5e942dffd65bc8751a95e49d # v0.0.2
        with:
          # We can't use the normal GITHUB_TOKEN for the following reason:
          # https://docs.github.com/en/actions/reference/events-that-trigger-workflows#triggering-new-workflows-using-a-personal-access-token
          # RELEASE_BRANCH_TOKEN requires public_repo OAuth scope
          repo-token: "${{ secrets.RELEASE_BRANCH_TOKEN }}"
          tag: ${{ steps.compute_tag_polkadot.outputs.new_tag || steps.compute_tag_cumulus.outputs.new_tag }}

      # - id: create-issue
      #   uses: JasonEtco/create-an-issue@e27dddc79c92bc6e4562f268fffa5ed752639abd # v2.9.1
      #   # Only create the issue if it's the first release candidate
      #   if: steps.compute_tag.outputs.first_rc == 'true'
      #   env:
      #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
      #     VERSION: ${{ steps.compute_tag.outputs.version }}
      #   with:
      #     filename: .github/ISSUE_TEMPLATE/release.md

      - name: Send Matrix message to ${{ matrix.channel.name }}
        uses: s3krit/matrix-message-action@70ad3fb812ee0e45ff8999d6af11cafad11a6ecf # v0.0.3
        # if: steps.create-issue.outputs.url != ''
        with:
          room_id: ${{ matrix.channel.room }}
          access_token: ${{ secrets.RELEASENOTES_MATRIX_V2_ACCESS_TOKEN }}
          server: m.parity.io
          message: |
            Release process for polkadot ${{ steps.compute_tag_polkadot.outputs.new_tag || steps.compute_tag_cumulus.outputs.new_tag }} has been started.<br/>