name: Render PlantUML Diagrams

on:
  push:
    branches: ["main", "develop", "release/**"]
    paths:
      - "docs/diagrams/**.puml"

jobs:
  render:
    name: Render .puml → .png
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          token: ${{ secrets.BOT_TOKEN }}

      - name: Install Java & Graphviz
        run: |
          sudo apt-get update -qq
          sudo apt-get install -y --no-install-recommends default-jre-headless graphviz

      - name: Download PlantUML jar
        run: |
          curl -sSL -o /usr/local/bin/plantuml.jar \
            https://github.com/plantuml/plantuml/releases/download/v1.2024.6/plantuml-1.2024.6.jar

      - name: Render diagrams
        run: |
          java -jar /usr/local/bin/plantuml.jar -tpng -o . docs/diagrams/*.puml

      - name: Commit rendered PNGs
        run: |
          git config user.name  "gitea-actions[bot]"
          git config user.email "gitea-actions[bot]@i3omb.com"
          git add docs/diagrams/*.png
          if git diff --cached --quiet; then
            echo "No diagram changes to commit."
          else
            git commit -m "ci: render PlantUML diagrams [skip ci]"
            git push
          fi