name: Check Kernel 6.12 Release

on:
  workflow_dispatch: # Allow manual triggering

jobs:
  check-kernel:
    runs-on: ubuntu-latest

    steps:
      - name: Check out infix repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.KERNEL_UPDATE_TOKEN }}

      - name: Check out linux repository
        uses: actions/checkout@v4
        with:
          repository: kernelkit/linux
          path: linux
          fetch-depth: 0
          token: ${{ secrets.KERNEL_UPDATE_TOKEN }}

      - name: Fetch kernel.org and check for 6.12 release
        id: check
        run: |
          set -e -o pipefail
          # Fetch the kernel.org frontpage and extract 6.12 version
          CURRENT_VERSION=$(curl -s https://www.kernel.org/ | grep -oP '6\.12\.\d+' | head -n1)

          if [ -z "$CURRENT_VERSION" ]; then
            echo "Failed to fetch kernel version"
            exit 1
          fi

          echo "current_version=$CURRENT_VERSION" >> $GITHUB_OUTPUT
          echo "Current 6.12 kernel version: $CURRENT_VERSION"

          # Get the latest tag from our linux tree
          cd linux
          git fetch origin
          LATEST_TAG=$(git tag -l "v6.12.*" | sort -V | tail -n1 | sed 's/^v//')
          cd ..

          echo "latest_tag=$LATEST_TAG" >> $GITHUB_OUTPUT
          echo "Latest tag in our tree: $LATEST_TAG"

          if [ "$CURRENT_VERSION" != "$LATEST_TAG" ]; then
            echo "new_release=true" >> $GITHUB_OUTPUT
            echo "🎉 New 6.12 kernel released: $CURRENT_VERSION (our version: $LATEST_TAG)"
          else
            echo "new_release=false" >> $GITHUB_OUTPUT
            echo "No change - still at $CURRENT_VERSION"
          fi

      - name: Set up git credentials
        if: steps.check.outputs.new_release == 'true'
        run: |
          set -e -o pipefail
          git config --global user.email "ael-bot@users.noreply.github.com"
          git config --global user.name "ael-bot"

          # Configure git to use the token for HTTPS operations
          git config --global url."https://ael-bot:${{ secrets.KERNEL_UPDATE_TOKEN }}@github.com/".insteadOf "git@github.com:"
          git config --global url."https://ael-bot:${{ secrets.KERNEL_UPDATE_TOKEN }}@github.com/".insteadOf "https://github.com/"

      - name: Run kernel upgrade script
        if: steps.check.outputs.new_release == 'true'
        env:
          GIT_TERMINAL_PROMPT: 0
        run: |
          set -e -o pipefail
          ./utils/kernel-upgrade.sh linux

      - name: Create pull request
        if: steps.check.outputs.new_release == 'true'
        uses: actions/github-script@v7
        with:
          github-token: ${{ secrets.KERNEL_UPDATE_TOKEN }}
          script: |
            // Check if PR already exists
            const { data: pulls } = await github.rest.pulls.list({
              owner: context.repo.owner,
              repo: context.repo.repo,
              head: `${context.repo.owner}:kernel-upgrade`,
              state: 'open'
            });

            if (pulls.length === 0) {
              const { data: pr } = await github.rest.pulls.create({
                owner: context.repo.owner,
                repo: context.repo.repo,
                title: `Upgrade to kernel ${{ steps.check.outputs.current_version }}`,
                head: 'kernel-upgrade',
                base: 'main',
                body: `Automated kernel upgrade to version ${{ steps.check.outputs.current_version }}.\n\n**Previous version:** ${{ steps.check.outputs.latest_tag }}\n**New version:** ${{ steps.check.outputs.current_version }}\n**Source:** https://www.kernel.org/\n\nThis PR was automatically created by the kernel release monitoring workflow.`
              });

              // Add label
              await github.rest.issues.addLabels({
                owner: context.repo.owner,
                repo: context.repo.repo,
                issue_number: pr.number,
                labels: ['ci:main']
              });

              // Request reviews
              await github.rest.pulls.requestReviewers({
                owner: context.repo.owner,
                repo: context.repo.repo,
                pull_number: pr.number,
                reviewers: ['troglobit', 'wkz', 'mattiaswal']
              });
            }