name: Auto Update Node Version

on:
  schedule:
    - cron: "0 6 * * 1" # Weekly, every Monday
  workflow_dispatch:

jobs:
  update-node:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v6
      - name: Get latest Node versions
        id: node-versions
        run: |
          # Get latest Node.js releases from official GitHub releases
          echo "Fetching latest Node.js releases..."

          # Get latest v20.x release
          LATEST_NODE20=$(curl -s https://api.github.com/repos/nodejs/node/releases | \
            jq -r '.[] | select(.tag_name | startswith("v20.")) | .tag_name' | \
            head -1 | sed 's/^v//')

          # Get latest v24.x release  
          LATEST_NODE24=$(curl -s https://api.github.com/repos/nodejs/node/releases | \
            jq -r '.[] | select(.tag_name | startswith("v24.")) | .tag_name' | \
            head -1 | sed 's/^v//')

          echo "Found Node.js releases: 20=$LATEST_NODE20, 24=$LATEST_NODE24"

          # Verify these versions are available in alpine_nodejs releases
          echo "Verifying availability in alpine_nodejs..."
          ALPINE_RELEASES=$(curl -s https://api.github.com/repos/actions/alpine_nodejs/releases | jq -r '.[].tag_name')

          if ! echo "$ALPINE_RELEASES" | grep -q "^v$LATEST_NODE20$"; then
            echo "::warning title=Node 20 Fallback::Node 20 version $LATEST_NODE20 not found in alpine_nodejs releases, using fallback"
            # Fall back to latest available alpine_nodejs v20 release
            LATEST_NODE20=$(echo "$ALPINE_RELEASES" | grep "^v20\." | head -1 | sed 's/^v//')
            echo "Using latest available alpine_nodejs Node 20: $LATEST_NODE20"
          fi

          if ! echo "$ALPINE_RELEASES" | grep -q "^v$LATEST_NODE24$"; then
            echo "::warning title=Node 24 Fallback::Node 24 version $LATEST_NODE24 not found in alpine_nodejs releases, using fallback"
            # Fall back to latest available alpine_nodejs v24 release
            LATEST_NODE24=$(echo "$ALPINE_RELEASES" | grep "^v24\." | head -1 | sed 's/^v//')
            echo "Using latest available alpine_nodejs Node 24: $LATEST_NODE24"
          fi

          # Validate that we have non-empty version numbers
          if [ -z "$LATEST_NODE20" ] || [ "$LATEST_NODE20" = "" ]; then
            echo "::error title=Invalid Node 20 Version::Failed to determine valid Node 20 version. Got: '$LATEST_NODE20'"
            echo "Available alpine_nodejs releases:"
            echo "$ALPINE_RELEASES" | head -10
            exit 1
          fi

          if [ -z "$LATEST_NODE24" ] || [ "$LATEST_NODE24" = "" ]; then
            echo "::error title=Invalid Node 24 Version::Failed to determine valid Node 24 version. Got: '$LATEST_NODE24'"
            echo "Available alpine_nodejs releases:"
            echo "$ALPINE_RELEASES" | head -10
            exit 1
          fi

          # Additional validation: ensure versions match expected format (x.y.z)
          if ! echo "$LATEST_NODE20" | grep -E '^[0-9]+\.[0-9]+\.[0-9]+$'; then
            echo "::error title=Invalid Node 20 Format::Node 20 version '$LATEST_NODE20' does not match expected format (x.y.z)"
            exit 1
          fi

          if ! echo "$LATEST_NODE24" | grep -E '^[0-9]+\.[0-9]+\.[0-9]+$'; then
            echo "::error title=Invalid Node 24 Format::Node 24 version '$LATEST_NODE24' does not match expected format (x.y.z)"
            exit 1
          fi

          echo "✅ Validated Node versions: 20=$LATEST_NODE20, 24=$LATEST_NODE24"
          echo "latest_node20=$LATEST_NODE20" >> $GITHUB_OUTPUT
          echo "latest_node24=$LATEST_NODE24" >> $GITHUB_OUTPUT

          # Check current versions in externals.sh
          CURRENT_NODE20=$(grep "NODE20_VERSION=" src/Misc/externals.sh | cut -d'"' -f2)
          CURRENT_NODE24=$(grep "NODE24_VERSION=" src/Misc/externals.sh | cut -d'"' -f2)

          echo "current_node20=$CURRENT_NODE20" >> $GITHUB_OUTPUT
          echo "current_node24=$CURRENT_NODE24" >> $GITHUB_OUTPUT

          # Determine if updates are needed
          NEEDS_UPDATE20="false"
          NEEDS_UPDATE24="false"

          if [ "$CURRENT_NODE20" != "$LATEST_NODE20" ]; then
            NEEDS_UPDATE20="true"
            echo "::notice title=Node 20 Update Available::Current: $CURRENT_NODE20 → Latest: $LATEST_NODE20"
          fi

          if [ "$CURRENT_NODE24" != "$LATEST_NODE24" ]; then
            NEEDS_UPDATE24="true"
            echo "::notice title=Node 24 Update Available::Current: $CURRENT_NODE24 → Latest: $LATEST_NODE24"
          fi

          if [ "$NEEDS_UPDATE20" == "false" ] && [ "$NEEDS_UPDATE24" == "false" ]; then
            echo "::notice title=No Updates Needed::All Node.js versions are up to date"
          fi

          echo "needs_update20=$NEEDS_UPDATE20" >> $GITHUB_OUTPUT
          echo "needs_update24=$NEEDS_UPDATE24" >> $GITHUB_OUTPUT

      - name: Update externals.sh and create PR
        if: steps.node-versions.outputs.needs_update20 == 'true' || steps.node-versions.outputs.needs_update24 == 'true'
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Final validation before making changes
          NODE20_VERSION="${{ steps.node-versions.outputs.latest_node20 }}"
          NODE24_VERSION="${{ steps.node-versions.outputs.latest_node24 }}"
          
          echo "Final validation of versions before PR creation:"
          echo "Node 20: '$NODE20_VERSION'"
          echo "Node 24: '$NODE24_VERSION'"
          
          # Validate versions are not empty and match expected format
          if [ -z "$NODE20_VERSION" ] || ! echo "$NODE20_VERSION" | grep -E '^[0-9]+\.[0-9]+\.[0-9]+$'; then
            echo "::error title=Invalid Node 20 Version::Refusing to create PR with invalid Node 20 version: '$NODE20_VERSION'"
            exit 1
          fi
          
          if [ -z "$NODE24_VERSION" ] || ! echo "$NODE24_VERSION" | grep -E '^[0-9]+\.[0-9]+\.[0-9]+$'; then
            echo "::error title=Invalid Node 24 Version::Refusing to create PR with invalid Node 24 version: '$NODE24_VERSION'"
            exit 1
          fi
          
          echo "✅ All versions validated successfully"

          # Update the files
          if [ "${{ steps.node-versions.outputs.needs_update20 }}" == "true" ]; then
            sed -i 's/NODE20_VERSION="[^"]*"/NODE20_VERSION="'"$NODE20_VERSION"'"/' src/Misc/externals.sh
          fi

          if [ "${{ steps.node-versions.outputs.needs_update24 }}" == "true" ]; then
            sed -i 's/NODE24_VERSION="[^"]*"/NODE24_VERSION="'"$NODE24_VERSION"'"/' src/Misc/externals.sh
          fi

          # Verify the changes were applied correctly
          echo "Verifying changes in externals.sh:"
          grep "NODE20_VERSION=" src/Misc/externals.sh
          grep "NODE24_VERSION=" src/Misc/externals.sh
          
          # Ensure we actually have valid versions in the file
          UPDATED_NODE20=$(grep "NODE20_VERSION=" src/Misc/externals.sh | cut -d'"' -f2)
          UPDATED_NODE24=$(grep "NODE24_VERSION=" src/Misc/externals.sh | cut -d'"' -f2)
          
          if [ -z "$UPDATED_NODE20" ] || [ -z "$UPDATED_NODE24" ]; then
            echo "::error title=Update Failed::Failed to properly update externals.sh"
            echo "Updated Node 20: '$UPDATED_NODE20'"
            echo "Updated Node 24: '$UPDATED_NODE24'"
            exit 1
          fi

          # Configure git
          git config --global user.name "github-actions[bot]"
          git config --global user.email "<41898282+github-actions[bot]@users.noreply.github.com>"

          # Create branch and commit changes
          branch_name="chore/update-node"
          git checkout -b "$branch_name"
          git commit -a -m "chore: update Node versions (20: $NODE20_VERSION, 24: $NODE24_VERSION)"
          git push --force origin "$branch_name"

          # Create PR body using here-doc for proper formatting
          cat > pr_body.txt << EOF
          Automated Node.js version update:

          - Node 20: ${{ steps.node-versions.outputs.current_node20 }} → $NODE20_VERSION
          - Node 24: ${{ steps.node-versions.outputs.current_node24 }} → $NODE24_VERSION

          This update ensures we're using the latest stable Node.js versions for security and performance improvements.

          **Note**: When updating Node versions, remember to also create a new release of alpine_nodejs at the updated version following the instructions at: https://github.com/actions/alpine_nodejs

          ---

          Autogenerated by [Node Version Upgrade Workflow](https://github.com/actions/runner/blob/main/.github/workflows/node-upgrade.yml)
          EOF

          # Create PR
          gh pr create -B main -H "$branch_name" \
            --title "chore: update Node versions" \
            --label "dependencies" \
            --label "dependencies-weekly-check" \
            --label "dependencies-not-dependabot" \
            --label "node" \
            --label "javascript" \
            --body-file pr_body.txt

          echo "::notice title=PR Created::Successfully created Node.js version update PR on branch $branch_name"