name: Generate Documentation

on:
  push:
    branches:
      - main
      - '*.*.*'
  workflow_dispatch:

permissions:
  contents: write

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout Repository
        uses: actions/checkout@v3

      - name: Install Rust Toolchain
        uses: rs-workspace/rust-toolchain@v0.1.0
        with:
          toolchain: nightly

      - name: Generate Documentation
        run: RUSTDOCFLAGS="--enable-index-page -Zunstable-options" cargo doc --workspace --no-deps

      - name: Prepare Documentation
        run: |
          BRANCH_NAME=$(echo "${GITHUB_REF##*/}" | tr '/' '_')  # Get branch name safely
          mkdir -p versioned_docs/$BRANCH_NAME
          cp -r target/doc/* versioned_docs/$BRANCH_NAME

      - name: Checkout to Docs Branch
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          git fetch origin docs || git checkout --orphan docs
          git checkout docs
          cp -r versioned_docs/* ./  # Copy docs to branch root
          rm -rf versioned_docs  # Clean up
          rm -rf target # Clean up

      - name: Generate README.md
        run: |
          VERSIONS=$(ls -d */ | sed 's#/##' | sort -r)  # Get all version directories and sort them (latest first)
          rm README.md # Delete README.md and generate a new one
          echo "# Azalea Docs" > README.md
          echo "Welcome to the documentation for Azalea Crate." >> README.md
          echo "" >> README.md
          
          # Update README.md with available versions
          echo "## Available Versions" >> README.md
          for VERSION in $VERSIONS; do
            echo "- [$VERSION](./$VERSION/index.html)" >> README.md
          done

          echo "README.md updated successfully."

      - name: Deploy Documentation to Docs Branch
        run: |
          git add .
          git commit -m "Update documentation for $GITHUB_REF_NAME" || echo "No changes to commit"
          git push origin docs