#!/bin/bash

red(){
  echo -e "\033[31m$1\033[0m"
}

green(){
  echo -e "\033[32m$1\033[0m"
}


# 获取系统包管理器
get_package_manager(){
  if command -v apt-get &> /dev/null; then
    echo "apt-get"
  elif command -v yum &> /dev/null; then
    echo "yum"
  else
    echo "未知的系统包管理器"
    return 1  # 返回错误状态码
  fi
}

# 检查 jq 是否已安装
check_jq() {
    if command -v jq >/dev/null 2>&1; then
        return 0
    else
        echo "jq 未安装"
        return 1
    fi
}

# 动态安装软件包
install_package() {
  local package_name=$1
  if command -v "$package_name" &> /dev/null; then
    echo "$package_name 已安装, 跳过."
    return 0
  fi

  echo "安装 $package_name..."
  local package_manager=$(get_package_manager)
  if [ "$package_manager" == "apt-get" ]; then
    sudo apt-get update
    sudo apt-get install -y "$package_name"
  elif [ "$package_manager" == "yum" ]; then
    sudo yum install -y "$package_name"
  else
    echo "未知的包管理器, 请手动安装 $package_name."
    return 1
  fi
}

check_config(){
    local script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)/../"  # 脚本文件夹绝对路径
    local config_file="$script_dir/../conf/config.json"

    # 如果配置文件不存在或者空白
    if [ ! -e "$config_file" ] || [ ! -s "$config_file" ];then
        echo "请先'创建配置'"
        exit 1
    fi

    # 如果配置未初始化
    local uuid=$(jq -r '.inbounds[0].settings.clients[0].id' "$config_file")
    if [ "$uuid" = "你的UUID" ] || [ -z "$uuid" ]; then
        echo "请先'创建配置'"
        exit 1
    fi

    # 检查配置文件是否为有效的JSON格式    
    if ! jq '.' "$config_file" >/dev/null 2>&1; then
        echo "配置文件不是有效的JSON格式, 请重新生成配置文件."
        exit 1
    fi
}   

# 通用：展示当前值并询问新值
# 用法: ask_input "提示语" "当前值(当前配置文件的值)"
# 示例: 
#  new_port=$(ask_input "请输入新的端口号" "$(jq -r '.inbounds[0].port' $config_dir/config.json)")
ask_input() {
    local prompt="$1" # 提示语
    local current_value="$2" 
    local input

    read -p "${prompt} [当前: ${current_value}]: " input
    # 用户直接回车则保留当前值，否则使用新输入
    echo "${input:-$current_value}"
}