using System;
using System.Collections.Generic;
using System.Text;

namespace NewLife.Serialization
{
    /// <summary>IJson序列化接口</summary>
    public interface IJson : IFormatterX
    {
        #region 属性
        /// <summary>是否缩进</summary>
        Boolean Indented { get; set; }

        /// <summary>处理器列表</summary>
        IList<IJsonHandler> Handlers { get; }
        #endregion

        #region 写入
        /// <summary>写入字符串</summary>
        /// <param name="value"></param>
        void Write(String value);

        /// <summary>写入</summary>
        /// <param name="sb"></param>
        /// <param name="value"></param>
        void Write(StringBuilder sb, Object value);
        #endregion

        #region 读取
        /// <summary>读取</summary>
        /// <param name="value"></param>
        /// <returns></returns>
        Boolean Read(String value);

        /// <summary>读取字节</summary>
        /// <returns></returns>
        Byte ReadByte();
        #endregion
    }

    /// <summary>IJson读写处理器接口</summary>
    public interface IJsonHandler : IHandler<IJson>
    {
        /// <summary>获取对象的Json字符串表示形式。</summary>
        /// <param name="value"></param>
        /// <returns>返回null表示不支持</returns>
        String GetString(Object value);
    }

    /// <summary>IJson读写处理器基类</summary>
    public abstract class JsonHandlerBase : HandlerBase<IJson, IJsonHandler>, IJsonHandler
    {
        /// <summary>获取对象的Json字符串表示形式。</summary>
        /// <param name="value"></param>
        /// <returns>返回null表示不支持</returns>
        public abstract String GetString(Object value);

        /// <summary>写入一个对象</summary>
        /// <param name="value">目标对象</param>
        /// <param name="type">类型</param>
        /// <returns>是否处理成功</returns>
        public override Boolean Write(Object value, Type type)
        {
            var v = GetString(value);
            if (v == null) return false;

            Host.Write(v);

            return true;
        }
    }
}