name: Prepare

on:
  push:
    branches:
      - main
  workflow_dispatch:

jobs:
  prepare:
    runs-on: standard-ubuntu-22
    steps:
      - name: 准备复用仓库（强制全量拉取 + 丢弃本地改动）
        run: |
          set -e
          REPO_DIR=/tmp/reused-repo
          REPO_URL="${{ github.server_url }}/${{ github.repository }}.git"
          BRANCH="${{ github.ref_name }}"

          echo "===== [$(date '+%F %T')] 开始准备仓库 ====="
          echo "复用目录: $REPO_DIR"
          echo "仓库地址: $REPO_URL"
          echo "目标分支: $BRANCH"

          if [ ! -d "$REPO_DIR/.git" ]; then
            echo "首次使用，克隆仓库..."
            git clone "$REPO_URL" "$REPO_DIR"
          fi

          cd "$REPO_DIR"

          echo "----- 丢弃本地所有更改 -----"
          git reset --hard
          git clean -fdx

          echo "----- 强制拉取最新（含 tag，删除已消失的远端 ref）-----"
          git remote set-url origin "$REPO_URL"
          git fetch origin --prune --prune-tags --tags --force

          echo "----- 强制对齐到远端分支 -----"
          git checkout -B "$BRANCH" "origin/$BRANCH"
          git reset --hard "origin/$BRANCH"
          git clean -fdx

          echo "----- 当前状态 -----"
          git log -1 --oneline
          echo "本地 tags:"
          git tag

      - name: 模拟准备耗时
        run: |
          echo "[$(date '+%F %T')] Prepare 开始 sleep 10s ..."
          sleep 10
          echo "[$(date '+%F %T')] Prepare 完成"