using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;

namespace BITKit
{
    /// <summary>
    /// 属性接口，用于序列化引用
    /// </summary>
    public interface IProperty
    {
    }
    /// <summary>
    ///     属性接口
    ///     GetOrCreate(√)
    ///     GetOrAdd(√)
    ///     TryGet(√)
    ///     TryRemove(√)
    ///     TrySet(√)
    ///     GetProperties(√)
    /// </summary>
    public interface IPropertable
    {
        /// <summary>
        /// 是否拥有属性
        /// </summary>
        bool Contains<T>();
        /// <summary>
        /// 获取或创建属性
        /// </summary>
        T GetOrCreateProperty<T>();
        /// <summary>
        /// 获取或通过工厂方法添加属性
        /// </summary>
        T GetOrAddProperty<T>(Func<T> addFactory);
        /// <summary>
        /// 尝试获取属性
        /// </summary>
        bool TryGetProperty<T>(out T value);
        /// <summary>
        /// 尝试移除属性
        /// </summary>
        bool TryRemoveProperty<T>();
        /// <summary>
        /// 尝试设置属性
        /// </summary>
        bool TrySetProperty<T>(T value);
        /// <summary>
        /// 获取所有属性
        /// </summary>
        object[] GetProperties();
        /// <summary>
        /// 清除所有属性
        /// </summary>
        /// <returns></returns>
        bool ClearProperties();
        /// <summary>
        /// 从其他对象复制属性
        /// </summary>
        /// <param name="propertable"></param>
        /// <returns></returns>
        bool CopyPropertiesFrom(IPropertable propertable);
    }
    public class Property : IPropertable
    {
        public Property() { }
        public Property(IEnumerable<object> factory) 
        {
            foreach (var x in factory)
            {
                properties.Add(x);
            }
        }
        private readonly List<object> properties=new();
        public T GetProperty<T>()
        {
            return properties.OfType<T>().First();
        }
        public void SetProperty<T>(T value)
        {
            for (var i = 0; i < properties.Count; i++)
            {
                if (properties[i] is T)
                    properties[i] = value;
            }
        }
        public bool Contains<T>()
        {
            return properties.OfType<T>().FirstOrDefault() is not null;
        }

        public T GetOrCreateProperty<T>()
        {
            return GetOrAddProperty(Activator.CreateInstance<T>);
        }

        public T GetOrAddProperty<T>(Func<T> addFactory)
        {
            foreach (var obj in properties)
            {
                if (obj is T t) return t;
            }
            T x;
            properties.Add(x = addFactory.Invoke());
            return x;
        }

        public bool TryGetProperty<T>(out T value)
        {
            try
            {
                value =  properties.OfType<T>().First();
                return true;
            }
            catch (InvalidOperationException)
            {
                value = default;
                return false;
            }
        }
        public bool TryRemoveProperty<T>()
        {
            var removed=false;
            foreach (var value in properties.OfType<T>().ToArray())
            {
                properties.Remove(value);
                removed = true;
            }
            // if(properties.TryGetValue(typeof(T).FullName, out var x))
            // {
            //     properties.Remove(typeof(T).Name);
            //     return true;
            // }
            return removed;
        }
        public bool TrySetProperty<T>(T value)
        {
            var current = properties.OfType<T>().FirstOrDefault();
            if (current is not null)
            {
                properties.Remove(current);
                return true;
            }
            properties.Add(value);
            return false;
        }

        public object[] GetProperties() => properties.ToArray();

        public void Read(BinaryReader r)
        {
            foreach (var x in properties)
            {

            }
        }

        public void Write(BinaryWriter w)
        {
            throw new NotImplementedException();
        }

        public bool ClearProperties()
        {
            properties.Clear();
            return true;
        }

        public bool CopyPropertiesFrom(IPropertable propertable)
        {
            ClearProperties();
            properties.AddRange( propertable.GetProperties());;
            return true;
        }
    }
}