name: Prepare Crypto-Node.js Release
# 
#  This is a helper workflow to craft a new Node.js release, trigger this via
#  the Github Workflow UI by dispatching it manually. Provide the version, the 
#  matrix-sdk-crypto-nodejs npm package should be set to, and a optionally the
#  old version (as used in the git tag) this release should be compared to.
#
#  This will then:
#    1. bump the npm version to the one you specified
#    2. commit that change together with the changelog (if it changed, see below)
#    3. create the appropriate tag on that commit
#    4. create the Github draft release, including the changes (if given, see below)
#    5. push these to a new branch, including tag, triggering the `release-crypto-nodejs` workflow
#    6. create a PR to merge these back into `main`
#
#  Additionally, if you provide a tag to comapare this tag to, this will:
#    1. create a changelog between the two releases, used for the github release
#    2. update the Changelog.md and include it in the commit
#
#  The remaining tasks are done by the release-crypto-nodejs workflow.

on:
  workflow_dispatch:
    inputs:
      version:
        description: 'New Node.js SemVer version to create'
        required: true 
        type: string
      previous_version:
        description: 'Create the changelog by comparing to this old SemVer Version (as used in the tag) '
        type: string

env:
  PKG_PATH: "bindings/matrix-sdk-crypto-nodejs"
  TAG_PREFIX: "matrix-sdk-crypto-nodejs-v"

jobs:
  prepare-release:
    name: "Preparing crypto-nodejs release tag"
    runs-on: ubuntu-latest
    outputs:
      tag: "${{ env.TAG_PREFIX }}${{ inputs.version }}"
    steps:
      - uses: actions/checkout@v3
      - uses: actions/setup-node@v3

      # Generate changelog since last tag, if given
      - name: Generate a changelog for upload
        if: inputs.previous_version
        uses: orhun/git-cliff-action@v1
        with:
          config: "${{ env.PKG_PATH }}/cliff.toml"
          args: --strip header "${{env.TAG_PREFIX}}${{ inputs.previous_version }}..HEAD"
        env:
          GIT_CLIFF_TAG: "Changes ${{ inputs.previous_version }} -> ${{ inputs.version }}"
          GIT_CLIFF_OUTPUT: "${{ env.PKG_PATH }}/CHANGES-${{ inputs.version }}.md"

      # Update changelog since last tag, if given
      - name: Update existing Changelog
        if: inputs.previous_version
        uses: orhun/git-cliff-action@v1
        with:
          config: "${{ env.PKG_PATH }}/cliff.toml"
          args: "${{env.TAG_PREFIX}}${{ inputs.previous_version }}..HEAD"
        env:
          GIT_CLIFF_TAG: "${{ inputs.version }}"
          GIT_CLIFF_PREPEND: "${{ env.PKG_PATH }}/CHANGELOG.md"

      - name: Set version
        id: package_version
        working-directory: ${{ env.PKG_PATH }}
        run: npm version ${{ inputs.version }}

      - uses: EndBug/add-and-commit@v9
        with:
          default_author: github_actions
          message: "Tagging Crypto-Node.js for release"
          tag: "${{env.TAG_PREFIX}}${{ inputs.version }}"
          new_branch: "gh-action/release-${{ env.TAG_PREFIX }}${{ inputs.version }}"
          push: true
          add: |
            ${{ env.PKG_PATH }}/package.json
            ${{ env.PKG_PATH }}/CHANGELOG.md

      # if we have generated changes
      - name: Update Github Release notes
        if: inputs.previous_version
        uses: softprops/action-gh-release@v1
        with:
          draft: true
          tag_name: ${{ env.TAG_PREFIX }}${{ inputs.version }}
          body_path: "${{ env.PKG_PATH }}/CHANGES-${{ inputs.version }}.md"

      # no changes, use the default changelog for the body
      - name: Update Github Release notes
        if: ${{!inputs.previous_version}}
        uses: softprops/action-gh-release@v1
        with:
          draft: true
          tag_name: ${{ env.TAG_PREFIX }}${{ inputs.version }}
          body_path: "${{ env.PKG_PATH }}/CHANGELOG.md"

      # let's create a PR for all this, too
      - name: Create Pull Request
        uses: peter-evans/create-pull-request@v4
        with:
          title: "Preparing Release ${{ env.TAG_PREFIX }}${{ inputs.version }}"
          body: |
            Automatic Pull-Request to merge release ${{ env.TAG_PREFIX }}${{ inputs.version }}

  trigger-release:
    # and trigger the tagging release workflow
    uses: ./.github/workflows/release-crypto-nodejs.yml
    needs: ['prepare-release']
    name: "Trigger release Workflow"
    with:
      tag: ${{needs.prepare-release.outputs.tag}}
    secrets:
        NPM_TOKEN: ${{ secrets.NPM_TOKEN }}