on:
  schedule:
    - cron: "7 23 * * *"
  workflow_dispatch:

jobs:
  update:
    runs-on: nix-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Update flake.lock
        run: nix flake update

      - name: Create PR if changed
        env:
          GITEA_TOKEN: ${{ secrets.KLAATU_TOKEN }}
          GITEA_URL: https://src.thehellings.com
          REPO: greg/mingw-sword-build
        run: |
          if git diff --quiet flake.lock; then
            echo "flake.lock unchanged, nothing to do"
            exit 0
          fi

          BRANCH="auto/update-flake-lock-$(date +%Y%m%d)"
          git config user.email "klaatu@thehellings.com"
          git config user.name "klaatu"
          git checkout -b "$BRANCH"
          git add flake.lock
          git commit -m "chore: update flake.lock $(date +%Y-%m-%d)"

          # Push branch using token auth
          git remote set-url origin "https://klaatu:${GITEA_TOKEN}@${GITEA_URL#https://}/${REPO}.git"
          git push origin "$BRANCH"

          # Create PR via Gitea API
          curl -s -X POST \
            -H "Authorization: token ${GITEA_TOKEN}" \
            -H "Content-Type: application/json" \
            "${GITEA_URL}/api/v1/repos/${REPO}/pulls" \
            -d "{
              \"title\": \"chore: update flake.lock $(date +%Y-%m-%d)\",
              \"head\": \"$BRANCH\",
              \"base\": \"main\",
              \"body\": \"Automated weekly flake.lock update.\\n\\nGenerated by Gitea Actions.\",
              \"assignees\": [\"greg\"]
            }"