using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Options;
using System.Collections.Concurrent;

namespace learun.util
{
	/// <summary>
	/// 版 本 EasyCode EC管理后台
	/// Copyright (c) 2019-present EC管理有限公司
	/// 创建人：tobin
	/// 日 期：2019.09.02
	/// 描 述：对HtmlHelper类进行扩展
	/// </summary>
	public static class ConfigHelper
	{
		/// <summary>
		/// 缓存数据（配置信息）
		/// </summary>
		private static readonly ConcurrentDictionary<string, object> _setting =
		   new ConcurrentDictionary<string, object>();

		/// <summary>
		/// 缓存数据
		/// </summary>
		private static readonly ConcurrentDictionary<string, string> _cache =
		  new ConcurrentDictionary<string, string>();

		private static IConfiguration configuration;

		/// <summary>
		/// 获取配置信息
		/// </summary>
		/// <typeparam name="T">数据类型</typeparam>
		/// <param name="key">键</param>
		/// <returns></returns>
		public static T GetAppSettings<T>(string key) where T : class, new()
		{
			if (configuration == null)
			{
				string fileName = "appsettings.json";
				if (GetValue<string>("env") == "dev")
				{
					fileName = "appsettings.Development.json";
				}

				var directory = ConfigHelper.GetValue<string>("baseDir");
				var filePath = $"{directory}/{fileName}";
				var builder = new ConfigurationBuilder();
				builder.AddJsonFile(filePath, false, true);
				configuration = builder.Build();
			}
			// 获取bin目录路径
			//if (!File.Exists(filePath))
			//{
			//    var length = directory.IndexOf("/bin", StringComparison.Ordinal);
			//    filePath = $"{directory.Substring(0, length)}/{fileName}";
			//}
			//IConfiguration configuration;

			var appconfig = new ServiceCollection()
				.AddOptions()
				.Configure<T>(configuration.GetSection(key))
				.BuildServiceProvider()
				.GetService<IOptions<T>>()
				.Value;

			return appconfig;
		}

		/// <summary>
		/// 获取配置信息
		/// </summary>
		/// <returns></returns>
		public static ServerOp GetConfig()
		{
			return GetAppSettings<ServerOp>("ServerOp");
		}

		/// <summary>
		/// 设置信息
		/// </summary>
		/// <param name="key">键</param>
		/// <param name="value">值</param>
		public static void SetValue(string key, object value)
		{
			_setting.GetOrAdd(key, value);
		}

		/// <summary>
		/// 获取数据值
		/// </summary>
		/// <typeparam name="T">类型</typeparam>
		/// <param name="key">键值</param>
		/// <returns></returns>
		public static T GetValue<T>(string key) where T : class
		{
			_setting.TryGetValue(key, out object result);
			return result as T;
		}

		/// <summary>
		/// 设置信息
		/// </summary>
		/// <param name="key">键</param>
		/// <param name="value">值</param>
		public static void SetCache(string key, string value)
		{
			_cache.GetOrAdd(key, value);
		}

		/// <summary>
		/// 获取数据值
		/// </summary>
		/// <param name="key">键值</param>
		/// <returns></returns>
		public static string GetCache(string key)
		{
			_cache.TryGetValue(key, out string result);
			return result;
		}
	}
}