name: Pre build step - Compile changelog file
on:
  workflow_dispatch:
    inputs:
      version:
        description: 'Version override. Default version is fetched from the base branch name, you can override the version but make sure the that the branch release/{version} exists on remote. Format: X.Y (Major.Minor)'
        required: false
        default: ''

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'

jobs:
  build-prep:
    name: Create changelog PR
    runs-on: ubuntu-20.04
    permissions:
      contents: write
      pull-requests: write
    steps:
      - name: Get version from the branch name workflow is running on
        if: ${{ github.event.inputs.version == '' }}
        uses: actions/github-script@v7
        id: extract-version
        with:
          script: |
            const refName = process.env.GITHUB_REF_NAME;
            const versionMatch = refName.match(/^release\/(\d+\.\d+)$/);
            if (versionMatch) {
              const version = versionMatch[1];
              console.log(`Extracted version: ${version}`);
              core.setOutput('version', version);
            } else {
              core.setFailed(`Branch name ${refName} does not match the expected pattern 'release/x.y'`);
              process.exit(1);
            }

      - name: Validate version input override
        if: ${{ github.event.inputs.version != '' }}
        uses: actions/github-script@v7
        env:
          VERSION: ${{ github.event.inputs.version }}
        with:
          script: |
            const version = process.env.VERSION;
            if (!/^\d+\.\d+$/.test(version)) {
              core.setFailed('Invalid version format. The version must be in the format X.Y');
              core.info(`Version you entered: ${version}`);
              process.exit(1);
            }

      - name: Checkout code
        uses: actions/checkout@v3
        with:
            fetch-depth: 0

      - name: Setup PNPM
        uses: pnpm/action-setup@a3252b78c470c02df07e9d59298aecedc3ccdd6d

      - name: Setup Node
        uses: actions/setup-node@64ed1c7eab4cce3362f8c340dee64e5eaeef8f7c
        with:
            node-version-file: .nvmrc
            cache: pnpm
            registry-url: 'https://registry.npmjs.org'

      - name: Install prerequisites
        run: |
            pnpm install --filter monorepo-utils --ignore-scripts
            # ignore scripts speeds up setup signficantly, but we still need to build monorepo utils
            pnpm build
        working-directory: tools/monorepo-utils

      - name: Generate changelog changes and create PR
        id: changelog
        env:
            GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: pnpm utils code-freeze changelog -o ${{ github.repository_owner }} -v ${{ github.event.inputs.version || steps.extract-version.outputs.version }}