name: Regenerate Documentation Index

on:
  push:
    branches:
      - main
    paths:
      - '**.md'
      - 'tools/generate_index.py'

jobs:
  regenerate-index:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Set up Python
        run: |
          apt-get update -qq && apt-get install -y -qq python3 > /dev/null
          ln -sf /usr/bin/python3 /usr/bin/python

      - name: Check if markdown files changed
        id: check_changes
        run: |
          CHANGED_FILES=$(git diff --name-only HEAD^ HEAD)

          if echo "$CHANGED_FILES" | grep -q '\.md$'; then
            echo "md_changed=true" >> $GITHUB_OUTPUT
          else
            echo "md_changed=false" >> $GITHUB_OUTPUT
          fi

      - name: Generate documentation index
        if: steps.check_changes.outputs.md_changed == 'true'
        run: |
          python tools/generate_index.py

      - name: Check if index changed
        if: steps.check_changes.outputs.md_changed == 'true'
        id: check_index
        run: |
          if git diff --quiet .docs-index.json; then
            echo "index_changed=false" >> $GITHUB_OUTPUT
          else
            echo "index_changed=true" >> $GITHUB_OUTPUT
          fi

      - name: Commit and push index
        if: steps.check_index.outputs.index_changed == 'true'
        run: |
          git config user.name "digiBandit"
          git config user.email "joey.king@dbits.ca"
          git add .docs-index.json
          git commit -m "Update documentation index (auto-generated)"
          git push