# ============================================================
# Build & Deploy — toozhao.com blog
# Trigger: push to hexo-source (source/config changes) or manual
# Flow: hexo generate -> push static build to master (GitHub Pages auto-deploys)
# ============================================================
name: Build & Deploy Blog

on:
  push:
    branches: [hexo-source]
    paths:
      - 'source/**'
      - '_config*.yml'
      - 'package.json'
      - 'package-lock.json'
  workflow_dispatch:

permissions:
  contents: write

jobs:
  build-and-deploy:
    runs-on: ubuntu-latest
    concurrency:
      group: blog-deploy
      cancel-in-progress: true
    steps:
      - name: Checkout source
        uses: actions/checkout@v4
        with:
          ref: hexo-source

      - name: Setup Node
        uses: actions/setup-node@v4
        with:
          node-version: 20
          cache: npm
          cache-dependency-path: package-lock.json

      - name: Install dependencies
        run: npm ci

      - name: Build site
        run: npx hexo generate

      - name: Deploy to master
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          set -euo pipefail
          rm -rf /tmp/deploy
          git clone --depth 1 -b master "https://x-access-token:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY}.git" /tmp/deploy
          cd /tmp/deploy
          # clean old build (keep .git)
          find . -path ./.git -prune -o -type f -print0 | xargs -0 rm -f
          find . -path ./.git -prune -o -type d -empty -print0 | xargs -0 rmdir
          # copy fresh build
          cp -r "${GITHUB_WORKSPACE}/public/." .
          git add -A
          if git diff --cached --quiet; then
            echo "No changes to deploy."
          else
            git -c user.name="github-actions[bot]" -c user.email="41898282+github-actions[bot]@users.noreply.github.com" \
              commit -m "Site updated: $(date -u '+%Y-%m-%d %H:%M:%S') [ci]"
            git push origin master
          fi