name: Sync to GitHub Pages

on:
  workflow_dispatch:
  push:
    branches:
      - main
    paths:
      - 'mt5/MQL5/**'
      - 'docs/**'
      - 'README.md'
      - '.github/workflows/github-pages-sync.yml'

permissions:
  contents: write

concurrency:
  group: github-pages-sync-main
  cancel-in-progress: false

jobs:
  sync-to-pages:
    runs-on: ubuntu-latest
    env:
      PAGES_REPO: Mouy-leng/-LengKundee-mql5.github.io.git
      PAGES_BRANCH: main
    steps:
      - name: Checkout main repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Check GitHub Pages sync configuration
        env:
          PAGES_SYNC_TOKEN: ${{ secrets.PAGES_SYNC_TOKEN }}
        run: |
          if [[ -z "${PAGES_SYNC_TOKEN:-}" ]]; then
            echo "PAGES_SYNC_ENABLED=false" >> "$GITHUB_ENV"
            echo "⚠️ Skipping GitHub Pages sync: PAGES_SYNC_TOKEN not configured."
            echo "To enable sync, add a Personal Access Token as PAGES_SYNC_TOKEN secret with repo permissions."
            exit 0
          fi
          echo "PAGES_SYNC_ENABLED=true" >> "$GITHUB_ENV"

      - name: Setup Git
        if: env.PAGES_SYNC_ENABLED == 'true'
        run: |
          git config --global user.name "github-actions[bot]"
          git config --global user.email "github-actions[bot]@users.noreply.github.com"

      - name: Clone GitHub Pages repository
        if: env.PAGES_SYNC_ENABLED == 'true'
        env:
          PAGES_SYNC_TOKEN: ${{ secrets.PAGES_SYNC_TOKEN }}
        run: |
          git clone https://${PAGES_SYNC_TOKEN}@github.com/${PAGES_REPO} pages-repo
          cd pages-repo
          git checkout ${PAGES_BRANCH} || git checkout -b ${PAGES_BRANCH}

      - name: Sync MQL5 files to GitHub Pages
        if: env.PAGES_SYNC_ENABLED == 'true'
        run: |
          # Copy MQL5 files
          mkdir -p pages-repo/mql5
          cp -r mt5/MQL5/* pages-repo/mql5/ || true
          
          # Copy documentation
          mkdir -p pages-repo/docs
          cp -r docs/* pages-repo/docs/ || true
          
          # Copy README if it exists
          cp README.md pages-repo/ || true

      - name: Commit and push to GitHub Pages
        if: env.PAGES_SYNC_ENABLED == 'true'
        env:
          PAGES_SYNC_TOKEN: ${{ secrets.PAGES_SYNC_TOKEN }}
        run: |
          cd pages-repo
          git add -A
          git diff --staged --quiet || {
            git commit -m "Auto-sync from MQL5-Google-Onedrive: $(date +'%Y-%m-%d %H:%M:%S')"
            git push https://${PAGES_SYNC_TOKEN}@github.com/${PAGES_REPO} ${PAGES_BRANCH}
          }

      - name: Summary
        if: env.PAGES_SYNC_ENABLED == 'true'
        run: |
          echo "✅ Successfully synced to GitHub Pages repository"
          echo "Repository: https://github.com/${PAGES_REPO}"
          echo "Branch: ${PAGES_BRANCH}"