#!/bin/bash
    set -e

    # ==================== 记录开始时间 ====================
    START_TIME=$(date +%s)  # 开始时间

    # ==================== 配置变量 ====================
    PROJECT_DEPLOY_SUBDIR="jenkins_test"                               # 部署项目目录名【按项目更改】
    BACKUP_SUB_DIR="jenkins_test_backup"                               # 备份子目录名【按项目更改】
    DIST_DIR="dist"                                                    # 构建产物目录【按项目更改】
    DEPLOY_PARENT_DIR="/www/wwwroot/frontend"                          # 部署父目录
    BACKUP_BASE_DIR="/www/wwwroot/frontend/backup"                     # 备份根目录
    DEPLOY_DIR="$DEPLOY_PARENT_DIR/$PROJECT_DEPLOY_SUBDIR"             # 完整部署路径
    BACKUP_DIR="$BACKUP_BASE_DIR/$BACKUP_SUB_DIR"                      # 完整备份路径
    MAX_BACKUPS=3                                                      # 最多保留的备份份数
    TIMESTAMP=$(date +"%Y%m%d_%H%M%S")                                 # 备份时间戳
    BACKUP_TAR_GZ="$BACKUP_DIR/${PROJECT_DEPLOY_SUBDIR}_${TIMESTAMP}.tar.gz" # 本次备份压缩包

    # ==================== 获取 Git 信息 ====================
    GIT_URL="${GIT_URL:-$(git config --get remote.origin.url 2>/dev/null || echo 'Unknown')}"
    GIT_BRANCH="${GIT_BRANCH:-$(git rev-parse --abbrev-ref HEAD 2>/dev/null || echo 'Unknown')}"
    GIT_BRANCH_CLEAN=$(echo "$GIT_BRANCH" | sed 's|refs/heads/||')

    # ==================== 输出部署信息 ====================
    echo "========================================"
    echo "?? 开始部署流程"
    echo "?? 仓库: $GIT_URL"
    echo "?? 分支: $GIT_BRANCH_CLEAN"
    echo "?? dist目录: $DIST_DIR"
    echo "?? 部署目录: $DEPLOY_DIR"
    echo "?? 备份目录: $BACKUP_DIR"
    echo "?? 本次备份: $BACKUP_TAR_GZ"
    echo "?? 最多保留: $MAX_BACKUPS 份备份"
    echo "========================================"

    # ================== （前端）代码编译 =====================
    # 按需自行修改
    yarn
    yarn build

    # ==================== 1. 检查 dist 目录 ====================
    if [ ! -d "$DIST_DIR" ]; then
        echo "?? 错误: 构建产物目录 '$DIST_DIR' 不存在！"
        exit 1
    fi

    if [ -z "$(ls -A $DIST_DIR)" ]; then
        echo "?? 错误: '$DIST_DIR' 目录为空！没有文件可部署。"
        exit 1
    fi

    # ==================== 2. 创建部署目录 ====================
    echo "?? 检查部署目录是否存在..."
    sudo mkdir -p "$DEPLOY_DIR"

    # ==================== 3. 备份现有文件为压缩包（如果存在）====================
    echo "?? 正在备份现有文件为压缩包..."

    if [ -n "$(ls -A $DEPLOY_DIR 2>/dev/null)" ]; then
        sudo mkdir -p "$BACKUP_DIR"
        cd "$DEPLOY_PARENT_DIR" || { echo "?? 无法进入目录: $DEPLOY_PARENT_DIR"; exit 1; }
        sudo tar -czf "$BACKUP_TAR_GZ" "$PROJECT_DEPLOY_SUBDIR" && \
        echo "?? 备份成功" || \
        { echo "?? 打包失败！"; exit 1; }
        cd - > /dev/null
    else
        echo "????  部署目录为空，无需备份。"
    fi

    # ==================== 4. 清理旧备份 ====================
    echo "?? 清理旧备份，保留最新的 $MAX_BACKUPS 个压缩包..."
    OLD_BACKUP_FILES=$(ls -1 "$BACKUP_DIR/${PROJECT_DEPLOY_SUBDIR}"_*.tar.gz 2>/dev/null | sort | head -n -$MAX_BACKUPS 2>/dev/null || true)

    if [ -n "$OLD_BACKUP_FILES" ]; then
        echo "??  将删除以下旧备份文件:"
        echo "$OLD_BACKUP_FILES"
        echo "$OLD_BACKUP_FILES" | xargs sudo rm -f && \
        echo "?? 旧备份清理完成" || \
        { echo "?? 删除旧备份失败！"; exit 1; }
    else
        echo "?? 无需清理，当前备份数量未超过 $MAX_BACKUPS 份。"
    fi

    # ==================== 5. 清空部署目录 ====================
    echo "?? 清空部署目录..."
    sudo find "$DEPLOY_DIR" -mindepth 1 -delete && \
    echo "?? 清空成功" || \
    { echo "?? 清空目录失败！"; exit 1; }

    # ==================== 6. 复制新文件 ====================
    echo "?? 复制新构建文件到部署目录..."
    sudo cp -rp "$DIST_DIR"/* "$DEPLOY_DIR"/ && \
    echo "?? 文件复制成功" || \
    { echo "?? 文件复制失败！"; exit 1; }

    # ==================== 7. 设置权限（可选）====================


    # ==================== 8. 部署时间计算 ====================
    END_TIME=$(date +%s)
    DURATION=$((END_TIME - START_TIME))
    HOURS=$((DURATION / 3600))
    MINUTES=$(((DURATION % 3600) / 60))
    SECONDS=$((DURATION % 60))

    echo "========================================"
    echo "?? 部署成功！"
    echo "?? 新版本已部署到: $DEPLOY_DIR"
    echo "?? 执行耗时: ${HOURS}h ${MINUTES}m ${SECONDS}s"
    echo "========================================"