using System;
using System.Configuration;

namespace Quanjiang.DigitalScholl.SendSms
{
    internal static class ConfigManager
    {
        private static readonly bool Error;

        private static readonly Configuration AppConfig;
            
        static ConfigManager()
        {
            var dllPath =$"{AppDomain.CurrentDomain.RelativeSearchPath ?? AppDomain.CurrentDomain.BaseDirectory}\\Quanjiang.DigitalScholl.SendSms.dll";
            try
            {
                AppConfig = ConfigurationManager.OpenExeConfiguration(dllPath);
            }
            catch (ConfigurationErrorsException)
            {
                Error = true;
            }
        }

        public static KeyValueConfigurationCollection AppSettings
        {
            get
            {
                if (Error) return null;
                return AppConfig.AppSettings.Settings;
            }
        }

        public static ConnectionStringSettingsCollection ConnectionStrings
        {
            get
            {
                if (Error) return null;
                return AppConfig.ConnectionStrings.ConnectionStrings;
            }
        }

        public static T GetSection<T>(string name) where T : ConfigurationSection
        {
            if (Error) return null;
            return AppConfig.GetSection(name) as T;
        }
    }
}