name: Update Documentation

on:
  push:
    branches:
      - main
    paths:
      - 'Casks/**'
      - 'Formula/**'
      - '.github/workflows/docs.yml'
      - 'scripts/generate-docs.sh'
  workflow_dispatch:

permissions:
  contents: write
  pages: write
  id-token: write

concurrency:
  group: update-docs
  cancel-in-progress: false

jobs:
  update-docs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Generate documentation
        run: |
          chmod +x scripts/generate-docs.sh
          ./scripts/generate-docs.sh

      - name: Check for changes
        id: check-changes
        run: |
          if git diff --quiet docs/index.html; then
            echo "changed=false" >> "$GITHUB_OUTPUT"
          else
            echo "changed=true" >> "$GITHUB_OUTPUT"
          fi

      - name: Commit and push changes
        if: steps.check-changes.outputs.changed == 'true'
        run: |
          git config --local user.email "github-actions[bot]@users.noreply.github.com"
          git config --local user.name "github-actions[bot]"
          git add docs/
          git commit -m "docs: auto-update documentation from casks"
          for attempt in 1 2 3 4; do
            if git pull --rebase origin main; then
              git push && exit 0
            else
              git rebase --abort || true
              git reset --hard origin/main
              ./scripts/generate-docs.sh
              git diff --quiet docs/index.html && exit 0
              git add docs/
              git commit -m "docs: auto-update documentation from casks"
              git push && exit 0
            fi
            sleep $((attempt * 5))
          done
          echo "could not push after 4 attempts" >&2
          exit 1

  deploy-pages:
    needs: update-docs
    runs-on: ubuntu-latest
    environment:
      name: github-pages
      url: ${{ steps.deployment.outputs.page_url }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          ref: main

      - name: Setup Pages
        uses: actions/configure-pages@v4

      - name: Upload artifact
        uses: actions/upload-pages-artifact@v3
        with:
          path: 'docs'

      - name: Deploy to GitHub Pages
        id: deployment
        uses: actions/deploy-pages@v4