name: Deploy Docusaurus Documentation (Dual Sites)

on:
  push:
    branches: [main]
    paths:
      - 'docs/**'
      - '.github/workflows/docusaurus.yml'
    tags:
      - 'v*.*.*'
  workflow_dispatch:

# Concurrency control: cancel in-progress deployments
# Pattern from GitHub Actions best practices for deployment workflows
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: write
  pages: write
  id-token: write

jobs:
  deploy:
    name: Build and Deploy Documentation Sites
    runs-on: ubuntu-latest
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    steps:
      - uses: actions/checkout@v6
        with:
          fetch-depth: 0  # Needed for version timestamps

      - name: Detect prerelease tag (beta/rc)
        id: taginfo
        run: |
          if [[ "${GITHUB_REF}" =~ ^refs/tags/v[0-9]+\.[0-9]+\.[0-9]+(b[0-9]+|rc[0-9]+)$ ]]; then
            echo "is_prerelease=true" >> "$GITHUB_OUTPUT"
            echo "Detected prerelease tag: ${GITHUB_REF}"
          else
            echo "is_prerelease=false" >> "$GITHUB_OUTPUT"
            echo "Stable tag or branch: ${GITHUB_REF}"
          fi

      - uses: actions/setup-node@v6
        with:
          node-version: 24
          cache: 'npm'
          cache-dependency-path: |
            docs/user/package-lock.json
            docs/developer/package-lock.json

      # USER DOCS BUILD
      - name: Install user docs dependencies
        working-directory: docs/user
        run: npm ci

      - name: Create user docs version snapshot on tag
        if: startsWith(github.ref, 'refs/tags/v') && steps.taginfo.outputs.is_prerelease != 'true'
        working-directory: docs/user
        run: |
          TAG_VERSION=${GITHUB_REF#refs/tags/}
          echo "Creating user documentation version: $TAG_VERSION"

          npm run docusaurus docs:version $TAG_VERSION || echo "Version already exists"

          # Update GitHub links in versioned docs
          if [ -d "versioned_docs/version-$TAG_VERSION" ]; then
            find versioned_docs/version-$TAG_VERSION -name "*.md" -type f -exec sed -i "s|github.com/jpawlowski/hass.tibber_prices/blob/main/|github.com/jpawlowski/hass.tibber_prices/blob/$TAG_VERSION/|g" {} \; || true
          fi

      - name: Cleanup old user docs versions
        if: startsWith(github.ref, 'refs/tags/v') && steps.taginfo.outputs.is_prerelease != 'true'
        working-directory: docs/user
        run: |
          chmod +x ../cleanup-old-versions.sh
          # Adapt script for single-instance mode (versioned_docs/ instead of user_versioned_docs/)
          sed 's/user_versioned_docs/versioned_docs/g; s/user_versions.json/versions.json/g; s/developer_versioned_docs/versioned_docs/g; s/developer_versions.json/versions.json/g' ../cleanup-old-versions.sh > cleanup-single.sh
          chmod +x cleanup-single.sh
          ./cleanup-single.sh

      - name: Build user docs website
        working-directory: docs/user
        run: npm run build

      # DEVELOPER DOCS BUILD
      - name: Install developer docs dependencies
        working-directory: docs/developer
        run: npm ci

      - name: Create developer docs version snapshot on tag
        if: startsWith(github.ref, 'refs/tags/v') && steps.taginfo.outputs.is_prerelease != 'true'
        working-directory: docs/developer
        run: |
          TAG_VERSION=${GITHUB_REF#refs/tags/}
          echo "Creating developer documentation version: $TAG_VERSION"

          npm run docusaurus docs:version $TAG_VERSION || echo "Version already exists"

          # Update GitHub links in versioned docs
          if [ -d "versioned_docs/version-$TAG_VERSION" ]; then
            find versioned_docs/version-$TAG_VERSION -name "*.md" -type f -exec sed -i "s|github.com/jpawlowski/hass.tibber_prices/blob/main/|github.com/jpawlowski/hass.tibber_prices/blob/$TAG_VERSION/|g" {} \; || true
          fi

      - name: Cleanup old developer docs versions
        if: startsWith(github.ref, 'refs/tags/v') && steps.taginfo.outputs.is_prerelease != 'true'
        working-directory: docs/developer
        run: |
          chmod +x ../cleanup-old-versions.sh
          # Adapt script for single-instance mode
          sed 's/user_versioned_docs/versioned_docs/g; s/user_versions.json/versions.json/g; s/developer_versioned_docs/versioned_docs/g; s/developer_versions.json/versions.json/g' ../cleanup-old-versions.sh > cleanup-single.sh
          chmod +x cleanup-single.sh
          ./cleanup-single.sh

      - name: Build developer docs website
        working-directory: docs/developer
        run: npm run build

      # MERGE BUILDS
      - name: Merge both documentation sites
        run: |
          mkdir -p deploy-root/user
          mkdir -p deploy-root/developer
          cp docs/index.html deploy-root/
          cp -r docs/user/build/* deploy-root/user/
          cp -r docs/developer/build/* deploy-root/developer/

      # COMMIT VERSION SNAPSHOTS
      - name: Commit version snapshots back to repository
        if: startsWith(github.ref, 'refs/tags/v') && steps.taginfo.outputs.is_prerelease != 'true'
        run: |
          TAG_VERSION=${GITHUB_REF#refs/tags/}

          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

          # Add version files from both docs
          git add docs/user/versioned_docs/ docs/user/versions.json 2>/dev/null || true
          git add docs/developer/versioned_docs/ docs/developer/versions.json 2>/dev/null || true

          # Commit if there are changes
          if git diff --staged --quiet; then
            echo "No version snapshot changes to commit"
          else
            git commit -m "docs: add version snapshot $TAG_VERSION and cleanup old versions [skip ci]"
            git push origin HEAD:main
            echo "Version snapshots committed and pushed to main"
          fi

      # DEPLOY TO GITHUB PAGES
      - name: Setup Pages
        uses: actions/configure-pages@v6

      - name: Upload artifact
        uses: actions/upload-pages-artifact@v4
        with:
          path: ./deploy-root

      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v5