name: Sync Wiki

on:
  workflow_dispatch:
  workflow_call:

permissions:
  contents: write

jobs:
  sync-wiki:
    runs-on: ubuntu-latest
    continue-on-error: true
    steps:
      - name: Checkout main repo
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Checkout wiki repo
        id: checkout-wiki
        continue-on-error: true
        run: |
          if git clone "https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}.wiki.git" wiki; then
            echo "wiki_exists=true" >> $GITHUB_OUTPUT
          else
            echo "wiki_exists=false" >> $GITHUB_OUTPUT
            echo "::warning::Wiki repository not found. Create the first wiki page at https://github.com/${GITHUB_REPOSITORY}/wiki to enable auto-sync."
          fi

      - name: Sync WIKI.md to Wiki/Home.md
        if: steps.checkout-wiki.outputs.wiki_exists == 'true'
        run: |
          SRC_FILE="WIKI.md"
          DEST_FILE="wiki/Home.md"

          if [ ! -f "$SRC_FILE" ]; then
            echo "No $SRC_FILE in main repo; skipping."
            exit 0
          fi

          if ! cmp -s "$SRC_FILE" "$DEST_FILE"; then
            echo "Changes found, updating wiki..."
            cp "$SRC_FILE" "$DEST_FILE"
            cd wiki
            git config user.name "github-actions[bot]"
            git config user.email "github-actions[bot]@users.noreply.github.com"
            git add Home.md
            git commit -m "Sync WIKI.md from main repo [skip ci]" || echo "No changes to commit"
            git push
          else
            echo "No changes in $SRC_FILE; wiki is up to date."
          fi