name: Deploy Website to GitHub Pages

on:
  push:
    branches: [ main, master ]
    paths:
      - 'website/**'
      - '.github/workflows/deploy-website.yml'
  pull_request:
    branches: [ main, master ]
    paths:
      - 'website/**'
      - '.github/workflows/deploy-website.yml'

# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
permissions:
  contents: read
  pages: write
  id-token: write

# Allow only one concurrent deployment, skipping runs queued between the run in-progress and latest queued.
# However, do NOT cancel in-progress runs as we want to allow these production deployments to complete.
concurrency:
  group: "pages"
  cancel-in-progress: false

jobs:
  # Build job
  build:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0 # Not needed if the latest version of actions/checkout is used

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: '18'
          cache: 'npm'

      - name: Install dependencies (if any)
        run: |
          if [ -f "package.json" ]; then
            npm ci
          fi
          if [ -f "website/package.json" ]; then
            cd website && npm ci
          fi

      - name: Validate HTML
        run: |
          # Install html-validate if not already installed
          npm install -g html-validate
          
          # Validate all HTML files in the website directory
          html-validate website/**/*.html

      - name: Validate CSS
        run: |
          # Install stylelint if not already installed
          npm install -g stylelint stylelint-config-standard
          
          # Create a basic stylelint config if it doesn't exist
          if [ ! -f ".stylelintrc.json" ]; then
            echo '{"extends": "stylelint-config-standard"}' > .stylelintrc.json
          fi
          
          # Validate CSS files
          stylelint "website/**/*.css"

      - name: Check for broken links
        run: |
          # Install linkchecker if available
          if command -v linkchecker &> /dev/null; then
            linkchecker --check-extern --no-robots --ignore-url="^https://httpbin.org" website/index.html
          else
            echo "linkchecker not available, skipping link validation"
          fi

      - name: Optimize images (if any)
        run: |
          # Install imagemin if there are images to optimize
          if find website -name "*.jpg" -o -name "*.jpeg" -o -name "*.png" -o -name "*.gif" | grep -q .; then
            npm install -g imagemin-cli imagemin-mozjpeg imagemin-pngquant
            find website -name "*.jpg" -o -name "*.jpeg" | xargs imagemin --out-dir=website
            find website -name "*.png" | xargs imagemin --out-dir=website
          fi

      - name: Create sitemap
        run: |
          # Get the repository name and owner for the GitHub Pages URL
          REPO_NAME=$(echo "${{ github.repository }}" | cut -d'/' -f2)
          OWNER_NAME=$(echo "${{ github.repository }}" | cut -d'/' -f1)
          
          # Create a simple sitemap
          cat > website/sitemap.xml << EOF
          <?xml version="1.0" encoding="UTF-8"?>
          <urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
            <url>
              <loc>https://${OWNER_NAME}.github.io/${REPO_NAME}/</loc>
              <lastmod>$(date -u +%Y-%m-%d)</lastmod>
              <changefreq>weekly</changefreq>
              <priority>1.0</priority>
            </url>
            <url>
              <loc>https://${OWNER_NAME}.github.io/${REPO_NAME}/docs/getting-started.html</loc>
              <lastmod>$(date -u +%Y-%m-%d)</lastmod>
              <changefreq>monthly</changefreq>
              <priority>0.8</priority>
            </url>
            <url>
              <loc>https://${OWNER_NAME}.github.io/${REPO_NAME}/docs/configuration.html</loc>
              <lastmod>$(date -u +%Y-%m-%d)</lastmod>
              <changefreq>monthly</changefreq>
              <priority>0.8</priority>
            </url>
            <url>
              <loc>https://${OWNER_NAME}.github.io/${REPO_NAME}/docs/alerting.html</loc>
              <lastmod>$(date -u +%Y-%m-%d)</lastmod>
              <changefreq>monthly</changefreq>
              <priority>0.8</priority>
            </url>
            <url>
              <loc>https://${OWNER_NAME}.github.io/${REPO_NAME}/docs/checkers.html</loc>
              <lastmod>$(date -u +%Y-%m-%d)</lastmod>
              <changefreq>monthly</changefreq>
              <priority>0.8</priority>
            </url>
          </urlset>
          EOF

      - name: Add robots.txt
        run: |
          # Get the repository name and owner for the GitHub Pages URL
          REPO_NAME=$(echo "${{ github.repository }}" | cut -d'/' -f2)
          OWNER_NAME=$(echo "${{ github.repository }}" | cut -d'/' -f1)
          
          cat > website/robots.txt << EOF
          User-agent: *
          Allow: /
          
          Sitemap: https://${OWNER_NAME}.github.io/${REPO_NAME}/sitemap.xml
          EOF

      - name: Setup Pages
        uses: actions/configure-pages@v4

      - name: Upload artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: './website'

  # Deployment job
  deploy:
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    runs-on: ubuntu-latest
    needs: build
    if: github.ref == 'refs/heads/main' || github.ref == 'refs/heads/master'
    steps:
      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4