using System.Text;

namespace OMS.NET.Common
{
    public sealed class ServerConfig
    {
        private Dictionary<string, string> _config = new();
        /// <summary>
        /// 连接数据库的连接字符串 default Empty
        /// 默认不带数据库名称
        /// </summary>
        public string ConnectionString => _config.TryGetValue("ConnectionString", out string? value)
        ? value
        : "";

        /// <summary>
        /// 数据库名称 default map_db
        /// </summary>
        public string DataBaseName => _config.TryGetValue("DataBaseName", out string? value)
        ? value
        : "map_db";

        /// <summary>
        /// 监听端口 default 8080
        /// </summary>
        public string ListenPort => _config.TryGetValue("ListenPort", out string? value)
        ? value
        : "8080";

        /// <summary>
        /// 是否开启匿名登录 default false
        /// </summary>
        public string AnonymousLogin => _config.TryGetValue("AnonymousLogin", out string? value)
        ? value
        : "false";

        /// <summary>
        /// 服务器最大在线人数
        /// default 20
        /// </summary>
        public string MaxUser => _config.TryGetValue("ServerConfigMaxUser", out string? value)
        ? value
        : "20";

        public ServerConfig()
        {
            //do nothing,everything default 
        }
        public ServerConfig(string configPath)
        {
            if (!File.Exists(configPath))
            {
                throw new FileNotFoundException("服务器配置文件未找到, path: " + configPath);
            }
            foreach (var line in File.ReadLines(configPath))
            {
                // 忽略空行和注释行
                var trimmedLine = line.Trim();
                if (string.IsNullOrEmpty(trimmedLine) || trimmedLine.StartsWith("#"))
                {
                    continue;
                }

                // 去掉行尾的注释
                var commentIndex = trimmedLine.IndexOf('#');
                if (commentIndex > -1)
                {
                    trimmedLine = trimmedLine[..commentIndex].Trim();
                }

                // 查找冒号的位置
                var separatorIndex = trimmedLine.IndexOf(':');
                if (separatorIndex > -1)
                {
                    // 获取键和值，并去除冒号前后的空格
                    var key = trimmedLine[..separatorIndex].Trim();
                    var value = trimmedLine[(separatorIndex + 1)..].Trim();

                    // 将键值对添加到字典中
                    _config[key] = value;
                }
            }
        }

        public override string ToString()
        {
            StringBuilder stringBuilder = new();
            foreach (var key in _config.Keys)
            {
                stringBuilder.AppendLine($"{key}:{_config[key]}");
            }
            //通过属性访问
            // stringBuilder.AppendLine("====加载默认值后的配置项====");
            // Type type = this.GetType();
            // PropertyInfo[] properties = type.GetProperties(BindingFlags.Public | BindingFlags.Instance);
            // foreach (PropertyInfo property in properties)
            // {
            //     if (property.CanRead && !property.CanWrite)
            //     {
            //         object? value = property.GetValue(this);
            //         stringBuilder.AppendLine($"{property.Name} = {value}");
            //     }
            // }
            return stringBuilder.ToString();
        }
    }
}