name: Update JSON Date in PR

on:
  schedule:
    - cron: '0 0,6,12,18 * * *'  # Viermal täglich (Mitternacht, 6 Uhr, 12 Uhr, 18 Uhr UTC)
  pull_request:
    branches:
      - main  # Der PR muss gegen den Main-Branch geöffnet werden

jobs:
  update-json-date:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v4
        with:
          ref: ${{ github.head_ref }}  # Den PR-Branch auschecken

      - name: Set up authentication
        env:
          GH_TOKEN: ${{ secrets.GH_TOKEN }}
        run: |
          git config --global user.name "json-updater-bot"
          git config --global user.email "json-updater-bot@users.noreply.github.com"
          git config --global credential.helper 'store'
          echo "https://json-updater-bot:$GH_TOKEN@github.com" > ~/.git-credentials

      - name: Check and modify JSON files
        run: |
          TODAY=$(date -u +%Y-%m-%d)
          # Überprüfen, ob JSON-Dateien vorhanden sind und das Datum setzen
          for json_file in $(find . -name "*.json"); do
            if jq -e 'type == "object"' "$json_file" > /dev/null 2>&1; then
              current_date=$(jq -r '.date_created' "$json_file")
              if [ "$current_date" != "$TODAY" ]; then
                jq --arg today "$TODAY" '.date_created = $today' "$json_file" > tmp.json && mv tmp.json "$json_file"
                git add "$json_file"
              fi
            fi
          done

      - name: Commit changes if necessary
        run: |
          git diff --quiet || (git commit -m "Update date_created to $TODAY" && git push origin ${{ github.head_ref }})