name: Generate banlist history graph

on:
  push:
    branches: [ main ]
    paths:
      - 'banned.txt'
      - 'scripts/banlist_metrics.py'
      - '.github/workflows/generate-banlist-graph.yml'
  schedule:
    - cron: '17 3 * * *'
  workflow_dispatch: {}

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.x'

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install matplotlib

      - name: Generate metrics and chart
        run: |
          python scripts/banlist_metrics.py \
            --file banned.txt \
            --csv metrics/banlist_counts.csv \
            --image assets/banlist_history.svg

      - name: Commit changes (if any)
        run: |
          git config user.name "actions-bot"
          git config user.email "actions@users.noreply.github.com"
          if [ -n "$(git status --porcelain -- metrics assets)" ]; then
            git add metrics assets
            git commit -m "chore: update banlist history graph [skip ci]"
            git push
          else
            echo "No changes to commit."
          fi