using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Configuration;

namespace Mesnac.Basic
{
    /// <summary>
    /// 应用程序配置文件访问辅助类
    /// </summary>
    public class AppConfigHelper
    {
        /// <summary>
        /// 读取string配置项
        /// </summary>
        /// <param name="appSettingKey">AppSetting配置项的Key值</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>返回对应配置项的string类型value值</returns>
        public static string GetAppSettingValue(string appSettingKey, string defaultValue)
        {
            string result = ConfigurationManager.AppSettings[appSettingKey];
            if (String.IsNullOrEmpty(result))
            {
                return defaultValue;
            }
            return result;
        }

        /// <summary>
        /// 读取bool配置项
        /// </summary>
        /// <param name="appSettingKey">AppSetting配置项的Key值</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>返回对应配置项的bool类型value值</returns>
        public static bool GetAppSettingValue(string appSettingKey, bool defaultValue)
        {
            string result = ConfigurationManager.AppSettings[appSettingKey];
            if (String.IsNullOrEmpty(result))
            {
                return defaultValue;
            }
            bool boolResult = false;
            if (bool.TryParse(result, out boolResult))
            {
                return boolResult;
            }
            else
            {
                return defaultValue;
            }
        }

        /// <summary>
        /// 读取int配置项
        /// </summary>
        /// <param name="appSettingKey">AppSetting配置项的Key值</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>返回对应配置项的int类型value值</returns>
        public static int GetAppSettingValue(string appSettingKey, int defaultValue)
        {
            string result = ConfigurationManager.AppSettings[appSettingKey];
            if (String.IsNullOrEmpty(result))
            {
                return defaultValue;
            }
            int intResult = 0;
            if (int.TryParse(result, out intResult))
            {
                return intResult;
            }
            else
            {
                return defaultValue;
            }
        }

        /// <summary>
        /// 读取double类型配置项
        /// </summary>
        /// <param name="appSettingKey">AppSetting配置项的Key值</param>
        /// <param name="defaultValue">默认值</param>
        /// <returns>返回对应配置项的double类型value值</returns>
        public static double GetAppSettingValue(string appSettingKey, double defaultValue)
        {
            string result = ConfigurationManager.AppSettings[appSettingKey];
            if (String.IsNullOrEmpty(result))
            {
                return defaultValue;
            }
            double doubleResult = 0.0;
            if (double.TryParse(result, out doubleResult))
            {
                return doubleResult;
            }
            else
            {
                return defaultValue;
            }
        }
    }
}