name: 'Release: Generate changelog'
on:
    workflow_dispatch:
        inputs:
            releaseBranch:
                description: 'The name of the release branch, in the format `release/x.y`'
                required: true
            releaseVersion:
                description: 'The version of the release, in the format `x.y`'
                required: true

env:
    GIT_COMMITTER_NAME: 'WooCommerce Bot'
    GIT_COMMITTER_EMAIL: 'no-reply@woocommerce.com'
    GIT_AUTHOR_NAME: 'WooCommerce Bot'
    GIT_AUTHOR_EMAIL: 'no-reply@woocommerce.com'

permissions: {}

jobs:
    create-changelog-prs:
        runs-on: ubuntu-20.04
        permissions:
          contents: read
          pull-requests: write
        steps:
            - name: Checkout code
              uses: actions/checkout@v3
              with:
                  fetch-depth: 0

            - name: Setup WooCommerce Monorepo
              uses: ./.github/actions/setup-woocommerce-monorepo
              with:
                  build: false

            - name: 'Git fetch the release branch'
              run: git fetch origin ${{ inputs.releaseBranch }}

            - name: 'Checkout the release branch'
              run: git checkout ${{ inputs.releaseBranch }}

            - name: 'Create a new branch for the changelog update PR'
              run: git checkout -b ${{ format( 'update/{0}-changelog', inputs.releaseVersion ) }}

            - name: 'Generate the changelog file'
              run: pnpm --filter=woocommerce run changelog write --add-pr-num -n -vvv --use-version ${{ inputs.releaseVersion }}

            - name: 'git rm deleted files'
              run: git rm $(git ls-files --deleted)

            - name: 'Commit deletion'
              run: git commit -m "Delete changelog files from ${{ inputs.releaseVersion }} release"

            - name: 'Remember the deletion commit hash'
              id: rev-parse
              run: echo "hash=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT

            - name: 'Insert NEXT_CHANGELOG contents into readme.txt'
              run: php .github/workflows/scripts/release-changelog.php

            - name: 'git add readme.txt'
              run: git add plugins/woocommerce/readme.txt

            - name: 'Commit readme'
              run: git commit -m "Update the readme files for the ${{ inputs.releaseVersion }} release"

            - name: 'Push update branch to origin'
              run: git push origin ${{ format( 'update/{0}-changelog', inputs.releaseVersion ) }}

            - name: 'Stash any other undesired changes'
              run: git stash

            - name: 'Checkout trunk'
              run: git checkout trunk

            - name: 'Create a branch for the changelog files deletion'
              run: git checkout -b ${{ format( 'delete/{0}-changelog', inputs.releaseVersion ) }}

            - name: 'Cherry-pick the deletion commit'
              run: git cherry-pick ${{ steps.rev-parse.outputs.hash }}

            - name: 'Push deletion branch to origin'
              run: git push origin ${{ format( 'delete/{0}-changelog', inputs.releaseVersion ) }}

            - name: 'Create release branch PR'
              id: release-pr
              uses: actions/github-script@v6
              with:
                  script: |
                      const result = await github.rest.pulls.create( {
                        owner: "${{ github.repository_owner }}",
                        repo: "${{ github.event.repository.name }}",
                        head: "${{ format( 'update/{0}-changelog', inputs.releaseVersion ) }}",
                        base: "${{ inputs.releaseBranch }}",
                        title: "${{ format( 'Release: Prepare the changelog for {0}', inputs.releaseVersion ) }}",
                        body: "${{ format( 'This pull request was automatically generated during the code freeze to prepare the changelog for {0}', inputs.releaseVersion ) }}"
                      } );

                      return result.data.number;

            - name: 'Create trunk PR'
              id: trunk-pr
              uses: actions/github-script@v6
              with:
                  script: |
                      const result = await github.rest.pulls.create( {
                        owner: "${{ github.repository_owner }}",
                        repo: "${{ github.event.repository.name }}",
                        head: "${{ format( 'delete/{0}-changelog', inputs.releaseVersion ) }}",
                        base: "trunk",
                        title: "${{ format( 'Release: Remove {0} change files', inputs.releaseVersion ) }}",
                        body: "${{ format( 'This pull request was automatically generated during the code freeze to remove the changefiles from {0} that are compiled into the `{1}` branch via #{2}', inputs.releaseVersion, inputs.releaseBranch, steps.release-pr.outputs.result ) }}"
                      } );

                      return result.data.number;