name: 🛠️ Build PR Preview

on:
  pull_request:

concurrency:
  group: ${{github.event.pull_request.head.ref}}
  cancel-in-progress: true

permissions:
  contents: read

jobs:
  metadata:
    runs-on: ubuntu-latest
    outputs:
      submodules: ${{ steps.submodules-fork.outputs.submodules || steps.submodules-main.outputs.submodules }}
      privileged: ${{ steps.submodules-fork.outputs.privileged || steps.submodules-main.outputs.privileged }}
    env:
      ACTIONS_SSH_KEY: ${{ secrets.ACTIONS_SSH_KEY }}
    steps:
      - name: Save PR metadata
        run: |
          mkdir -p ./metadata
          echo ${{ github.event.number }} > ./metadata/NR
          echo ${{ github.event.pull_request.head.sha }} > ./metadata/SHA

      - name: Set submodules for fork
        if: env.ACTIONS_SSH_KEY == ''
        id: submodules-fork
        run: |
          echo 'submodules={"repo":["brand","i18n"]}' >> "$GITHUB_OUTPUT"
          echo "privileged=false" >> "$GITHUB_OUTPUT"
          echo "false" > ./metadata/PRIVILEGED

      - name: Set submodules for main repo
        if: env.ACTIONS_SSH_KEY != ''
        id: submodules-main
        run: |
          echo 'submodules={"repo":["brand","i18n","mkdocs-material-insiders"]}' >> "$GITHUB_OUTPUT"
          echo "privileged=true" >> "$GITHUB_OUTPUT"
          echo "true" > ./metadata/PRIVILEGED

      - name: Upload metadata as artifact
        uses: actions/upload-artifact@v4
        with:
          name: metadata
          path: metadata

  build_english:
    strategy:
      matrix:
        lang: [en]
      fail-fast: true
    uses: ./.github/workflows/build.yml
    with:
      ref: ${{github.event.pull_request.head.ref}}
      repo: ${{github.event.pull_request.head.repo.full_name}}
      continue-on-error: false

  combine_build:
    needs: build_english
    runs-on: ubuntu-latest
    steps:
      - uses: actions/download-artifact@v4
        with:
          pattern: site-build.tar.gz
          merge-multiple: true

      - run: |
          for file in *.tar.gz; do tar -zxf "$file"; done
          ls -la public/

      - name: Upload Site
        uses: actions/upload-artifact@v4
        with:
          name: site-build-combined
          path: public
          retention-days: 5