/********************************************************************
	文件: LinkedSequence.cs
	作者: 梦语
	邮箱: 1982614048@qq.com
	创建时间: 2024/03/29 17:28:19
	最后修改: 梦语
	最后修改时间: 2024/04/03 16:04:31
	功能: 自定义顺序链表
*********************************************************************/
using System.Collections;
using System.Linq;
using System.Collections.Generic;
using UnityEngine;
using System;

namespace Ether
{
    public class LinkedNode<TKey, TValue> where TKey : IComparable
    {
        public LinkedSequence<TKey, TValue> Sequence;
        public TKey Key { get; set; }
        public TValue Value { get; set; }

        public void SetAsLastSibling()
        {
            Sequence.SetAsLastSibling(Key);
        }

        public void SetAsFirstSibling()
        {
            Sequence.SetAsFirstSibling(Key);
        }

    }

    public class LinkedNode<TValue> where TValue : IComparable
    {
        public LinkedSequence<TValue> Sequence;
        public TValue Value { get; set; }

        public void SetAsLastSibling()
        {
            Sequence.SetAsLastSibling(this);
        }

        public void SetAsFirstSibling()
        {
            Sequence.SetAsFirstSibling(this);
        }

    }

    public class LinkedSequence<TValue> : IEnumerable<LinkedNode<TValue>> where TValue : IComparable
    {
        private List<LinkedNode<TValue>> linkedList = new List<LinkedNode<TValue>>();

        public LinkedNode<TValue> this[int index]
        {
            get
            {
                return linkedList[index];
            }
            set
            {
                linkedList[index] = value;
            }
        }

        public LinkedNode<TValue> this[TValue tvalue]
        {
            get
            {
                foreach (var node in linkedList)
                {
                    if (node.Value.CompareTo(tvalue) == 0)
                    {
                        return node;
                    }
                }
                return null;
            }
            set
            {
                int index = 0;
                LinkedNode<TValue> tempNode = null;

                for (int i = 0; i < linkedList.Count; i++)
                {
                    var node = linkedList[i];
                    if (node.Value.CompareTo(tvalue) == 0)
                    {
                        index = i;
                        tempNode = node;
                        break;
                    }
                }

                if (tempNode == null)
                {
                    linkedList.Add(value);
                }
                else
                {
                    linkedList[index] = value;
                }
            }
        }

        public int Count { get { return linkedList.Count; } }

        public LinkedNode<TValue> Add(TValue value)
        {
            LinkedNode<TValue> node;
            if (Contains(value))
            {
                node = GetLinkedNode(value);
                node.SetAsLastSibling();
            }
            else
            {
                node = new LinkedNode<TValue>();
                node.Sequence = this;
                node.Value = value;
            }
            linkedList.Add(node);

            return node;
        }

        public void Remove(TValue value)
        {
            linkedList.Remove(GetLinkedNode(value));
        }

        public LinkedNode<TValue> GetLinkedNode(TValue value)
        {
            foreach (var node in linkedList)
            {
                if (node.Value.Equals(value))
                {
                    return node;
                }
            }

            return null;
        }

        public bool Contains(TValue value)
        {
            foreach (var node in linkedList)
            {
                if (node.Value.Equals(value))
                {
                    return true;
                }
            }

            return false;
        }

        public void SetAsLastSibling(LinkedNode<TValue> node)
        {
            int index = linkedList.IndexOf(node);
            if (index != -1 && index != linkedList.Count - 1)
            {
                linkedList.Remove(node);
                linkedList.Add(node);
            }
        }

        public void SetAsFirstSibling(LinkedNode<TValue> node)
        {
            int index = linkedList.IndexOf(node);
            if (index != -1 && index != 0)
            {
                linkedList.Remove(node);
                linkedList.Insert(0, node);
            }
        }

        public IEnumerator<LinkedNode<TValue>> GetEnumerator()
        {
            for (int i = 0; i < linkedList.Count; i++)
            {
                LinkedNode<TValue> node = linkedList[i];
                yield return node;
            }
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            for (int i = 0; i < linkedList.Count; i++)
            {
                LinkedNode<TValue> node = linkedList[i];
                yield return node;
            }
        }

        public void Clear()
        {
            linkedList.Clear();
        }
    }

    public class LinkedSequence<TKey, TValue> : IEnumerable<KeyValuePair<TKey, LinkedNode<TKey, TValue>>> where TKey : IComparable
    {
        private DictionaryEx<TKey, LinkedNode<TKey, TValue>> linkedDic = new DictionaryEx<TKey, LinkedNode<TKey, TValue>>();
        //private List<LinkedNode> LinkedList;

        public LinkedNode<TKey, TValue> this[TKey key]
        {
            get
            {
                return linkedDic[key];
            }
            set
            {
                linkedDic[key] = value;
            }
        }

        public int Count { get { return linkedDic.Count; } }

        public LinkedNode<TKey, TValue> Add(TKey key, TValue value)
        {
            LinkedNode<TKey, TValue> node;
            if (linkedDic.ContainsKey(key))
            {
                node = linkedDic[key];
                node.Value = value;
            }
            else
            {
                node = new LinkedNode<TKey, TValue>();
                node.Sequence = this;
                node.Key = key;
                node.Value = value;
            }
            linkedDic.Add(key, node);

            return node;
        }

        public void Remove(TKey key)
        {
            linkedDic.Remove(key);
        }

        public bool ContainsKey(TKey key)
        {
            return linkedDic.ContainsKey(key);
        }

        public void Clear()
        {
            linkedDic.Clear();
        }

        public void SetAsLastSibling(TKey key)
        {
            linkedDic.SetAsLastSibling(key);
        }

        public void SetAsFirstSibling(TKey key)
        {
            linkedDic.SetAsFirstSibling(key);
        }

        public IEnumerator<KeyValuePair<TKey, LinkedNode<TKey, TValue>>> GetEnumerator()
        {
            for (int i = 0; i < linkedDic.Count; i++)
            {
                KeyValuePair<TKey, LinkedNode<TKey, TValue>> dicPair = linkedDic.ElementAt(i);
                yield return dicPair;
            }
        }

        IEnumerator IEnumerable.GetEnumerator()
        {
            for (int i = 0; i < linkedDic.Count; i++)
            {
                KeyValuePair<TKey, LinkedNode<TKey, TValue>> dicPair = linkedDic.ElementAt(i);
                yield return dicPair;
            }
        }

    }
}