using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace WxOrder.Framework.Commons;
public class EnvironmentHelper
{
	private static string? _currentEnvironment;

	// 获取当前环境
	public static string CurrentEnvironment
	{
		get
		{
			if (_currentEnvironment == null)
			{
				_currentEnvironment = DetermineEnvironment();
			}
			return _currentEnvironment;
		}
	}
	public static bool IsTest => CurrentEnvironment.Equals("Test", StringComparison.OrdinalIgnoreCase);
	public static bool IsDevelopment => CurrentEnvironment.Equals("Development", StringComparison.OrdinalIgnoreCase);

	public static bool IsProduction => CurrentEnvironment.Equals("Production", StringComparison.OrdinalIgnoreCase);

	private static string DetermineEnvironment()
	{
#if RELEASE
		// Release 构建：只允许生产环境，不允许其他环境
		return "Production";
#else
		// 1. 检查环境变量
		var envVar = Environment.GetEnvironmentVariable("DOTNET_ENVIRONMENT") ??
					Environment.GetEnvironmentVariable("ENVIRONMENT");

		if (!string.IsNullOrEmpty(envVar))
		{
			return envVar;
		}


		// 检查当前机器名
		string machineName = Environment.MachineName.ToLower();
		if (machineName.Contains("dev") ||
			machineName.Contains("test"))
		{
			return machineName.Contains("TEST") ? "Test" : "Development";
		}

		// 4. 默认返回 Production
		return "Production";
#endif
	}

	// 获取环境描述
	public static string EnvironmentDescription
	{
		get
		{
			if (IsTest) return "测试环境";
			if (IsDevelopment) return "开发环境";
			if (IsProduction) return "生产环境";
			return $"未知环境 ({CurrentEnvironment})";
		}
	}
}