name: Deploy Design System Docs to Production

on:
  push:
    branches:
      - trunk
    paths:
      - apps/design-system-docs/**
      - .github/actions/build-design-system-docs/action.yml
      - .github/workflows/ds-docs-deploy-production.yml

concurrency:
  group: deploy-production-design-system-docs
  cancel-in-progress: true

jobs:
  deploy:
    runs-on: ubuntu-latest

    steps:
      # 1. Checkout the PR code
      - uses: actions/checkout@v4

      # 2. Build the Design System Docs site
      - uses: ./.github/actions/build-design-system-docs

      # 3. Upload over SSH to the production server
      - name: Sync to production server
        env:
          # See: https://wp.me/p9o2xV-5Da#comment-11607
          SSH_USER: ${{ secrets.DESIGN_SYSTEM_PRODUCTION_SSH_USER }}
          SSH_PRIVATE_KEY: ${{ secrets.DESIGN_SYSTEM_PRODUCTION_SSH_KEY }}
          # Generated via: `ssh-keyscan -t ssh-ed25519 sftp.wp.com`. Stored as a secret not because
          # it's sensitive, but to make it easier to change without code revisions.
          SSH_HOST_PUBLIC_KEY: ${{ secrets.DESIGN_SYSTEM_PRODUCTION_SSH_PUBLIC_KEY }}
        run: |
          printf '%s' "$SSH_PRIVATE_KEY" > key.pem
          chmod 600 key.pem

          # Write known_hosts with public key for strict key checking
          mkdir -p ~/.ssh
          echo "sftp.wp.com ssh-ed25519 $SSH_HOST_PUBLIC_KEY" > ~/.ssh/known_hosts

          # Copy the built site to the production server
          scp -r -i key.pem \
            -o UserKnownHostsFile=~/.ssh/known_hosts \
            -o StrictHostKeyChecking=yes \
            apps/design-system-docs/dist/* \
            "$SSH_USER@sftp.wp.com:/srv/htdocs/"

          rm key.pem