name: Deploy Docs

on:
  push:
    branches: ["1.x"]
    paths:
      - 'docs/**'
      - '.github/workflows/deploy-docs.yml'
  workflow_dispatch:
    inputs:
      version:
        description: 'Version branch to deploy (e.g., 1.x)'
        required: true
        type: choice
        options:
          - '1.x'

# Prevent concurrent deploys to avoid push conflicts
concurrency:
  group: deploy-docs
  cancel-in-progress: false

permissions:
  contents: write

jobs:
  deploy:
    runs-on: ubuntu-latest
    steps:
      - name: Determine version
        id: version
        run: |
          if [ "${{ github.event_name }}" == "workflow_dispatch" ]; then
            echo "branch=${{ inputs.version }}" >> $GITHUB_OUTPUT
          else
            echo "branch=${GITHUB_REF#refs/heads/}" >> $GITHUB_OUTPUT
          fi

      - name: Set version config
        id: config
        run: |
          BRANCH="${{ steps.version.outputs.branch }}"
          case $BRANCH in
            1.x)
              echo "dest_folder=." >> $GITHUB_OUTPUT
              echo "base_url=/comments/" >> $GITHUB_OUTPUT
              echo "is_latest=true" >> $GITHUB_OUTPUT
              ;;
            *)
              echo "Unknown branch: $BRANCH"
              exit 1
              ;;
          esac

      - name: Checkout source branch
        uses: actions/checkout@v6
        with:
          ref: ${{ steps.version.outputs.branch }}

      - name: Checkout gh-pages
        uses: actions/checkout@v6
        with:
          ref: gh-pages
          path: gh-pages

      - name: Setup Node.js
        uses: actions/setup-node@v6
        with:
          node-version: '20'
          cache: 'npm'
          cache-dependency-path: 'docs/package-lock.json'

      - name: Install dependencies
        working-directory: ./docs
        run: npm ci

      - name: Build documentation
        working-directory: ./docs
        run: npm run generate
        env:
          NUXT_APP_BASE_URL: ${{ steps.config.outputs.base_url }}
          NUXT_SITE_URL: https://relaticle.github.io
          DOCS_VERSION: ${{ steps.version.outputs.branch }}
          NUXT_PUBLIC_FATHOM_SITE_ID: ${{ secrets.FATHOM_SITE_ID }}

      - name: Deploy to gh-pages
        run: |
          DEST="${{ steps.config.outputs.dest_folder }}"
          IS_LATEST="${{ steps.config.outputs.is_latest }}"

          if [ "$IS_LATEST" == "true" ]; then
            echo "Deploying latest version to root..."
            cd gh-pages
            # List of items to preserve
            PRESERVE="versions.json .nojekyll README.md .git"
            # Remove everything except preserved items
            for item in *; do
              if [ -e "$item" ]; then
                SKIP=false
                for keep in $PRESERVE; do
                  if [ "$item" == "$keep" ]; then
                    SKIP=true
                    break
                  fi
                done
                if [ "$SKIP" == "false" ]; then
                  rm -rf "$item"
                fi
              fi
            done
            # Also remove hidden files except .git, .nojekyll
            for item in .[!.]*; do
              if [ -e "$item" ] && [ "$item" != ".git" ] && [ "$item" != ".nojekyll" ]; then
                rm -rf "$item"
              fi
            done
            cd ..
            # Copy new build to root
            cp -r docs/.output/public/* gh-pages/
          else
            echo "Deploying to $DEST subfolder..."
            rm -rf "gh-pages/$DEST"
            cp -r docs/.output/public "gh-pages/$DEST"
          fi

      - name: Commit and push
        working-directory: ./gh-pages
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add -A
          if git diff --staged --quiet; then
            echo "No changes to deploy"
          else
            git commit -m "Deploy ${{ steps.version.outputs.branch }} docs"
            git push
          fi