using System;
using System.Configuration;
using System.Linq;

namespace DataPro.Core.Config
{
    public static class DataProConfig
    {
        private static readonly Configuration Config;

        // static constructor
        static DataProConfig()
        {
            var dataProConfig = new ExeConfigurationFileMap
            {
                ExeConfigFilename = DataProConstants.CustomConfigPath
            };

            Config = ConfigurationManager.OpenMappedExeConfiguration(dataProConfig, ConfigurationUserLevel.None, true);
        }

        /// <summary>
        /// Static variable to hold alternate configuration file
        /// </summary>
        public static Configuration AltConfig
        {
            get { return Config; }
        }

        /// <summary>
        /// Static method to retrieve a setting from config file
        /// </summary>
        /// <param name="key">string</param>
        /// <returns>string</returns>
        public static string GetAppSetting(string key)
        {
            var appSetting = Config.AppSettings.Settings.Cast<KeyValueConfigurationElement>().FirstOrDefault(setting => setting.Key == key);

            return appSetting == null ? String.Empty : appSetting.Value;
        }

        /// <summary>
        /// Static method to get a section from config file. Used by plugin code to get plugin library section.
        /// </summary>
        /// <param name="sectionName">string</param>
        /// <returns>object</returns>
        public static object GetSection(string sectionName)
        {
            return Config.GetSection(sectionName);
        }
    }
}