name: Generate Timeline

on:
  push:
    branches: [ "main", "master" ]
    paths:
      - 'scripts/generate_timeline.py'
      - 'scripts/data/timeline_data.csv'
      - '.github/workflows/generate_timeline.yml'
  workflow_dispatch: # Allows manual trigger from GitHub Actions UI

jobs:
  build-and-release:
    runs-on: ubuntu-latest
    # 赋予 GITHUB_TOKEN 创建/更新 Release 的权限
    permissions:
      contents: write

    steps:
    - name: Checkout repository
      uses: actions/checkout@v4

    - name: Set up Python
      uses: actions/setup-python@v5
      with:
        python-version: '3.10'

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

    - name: Run timeline generation script
      run: |
        python scripts/generate_timeline.py

    - name: Update Latest Release with Image
      uses: softprops/action-gh-release@v2
      with:
        tag_name: latest
        name: Latest Timeline Output
        body: "Auto-generated timeline image. Updated by CI."
        files: assets/timeline_output.png
        make_latest: true