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/*----------------------------------------------------------

This Source Code Form is subject to the terms of the

Mozilla Public License, v.2.0. If a copy of the MPL

was not distributed with this file, You can obtain one

at http://mozilla.org/MPL/2.0/.

----------------------------------------------------------*/

using System;

using System.Collections;

using System.Collections.Generic;

namespace OneScript.Language

{

public class IdentifiersTrie<T> : IDictionary<string, T>

{

private readonly TrieNode _root = new TrieNode();

private class TrieNode

{

public char charL;

public char charU;

public TrieNode sibl;

public TrieNode next;

private T _value;

public T Value

{

get => _value;

set

{

HasValue = true;

_value = value;

}

}

public bool HasValue { get; private set; }

public TrieNode Find(char ch)

{

var node = sibl;

while (node != null)

{

if (node.charL == ch || node.charU == ch)

return node;

node = node.sibl;

}

return null;

}

}

public void Add(string str, T val)

{

var node = _root;

foreach (char ch in str)

{

var key = node.Find(ch);

if (key == null)

{

key = new TrieNode

{

charL = char.ToLower(ch),

charU = char.ToUpper(ch),

Value = default(T),

sibl = node.sibl

};

node.sibl = key;

key.next = new TrieNode();

}

node = key.next;

}

node.Value = val;

}

public bool ContainsKey(string key)

{

var node = _root;

foreach (char ch in key)

{

var keyNode = node.Find(ch);

if (keyNode == null)

{

return false;

}

node = keyNode.next;

}

return node.next == null && node.HasValue;

}

public bool Remove(string key)

{

throw new System.NotImplementedException();

}

public T Get(string str)

{

var node = _root;

foreach (char ch in str)

{

TrieNode key = node.Find(ch);

if (key == null)

throw new KeyNotFoundException();

node = key.next;

}

if (!node.HasValue)

throw new KeyNotFoundException();

return node.Value;

}

public T this[string index]

{

get => Get(index);

set => Add(index, value);

}

public ICollection<string> Keys => throw new NotSupportedException();

public ICollection<T> Values => throw new NotSupportedException();

public bool TryGetValue(string str, out T value)

{

var node = _root;

foreach (char ch in str)

{

var key = node.Find(ch);

if (key == null)

{

value = default;

return false;

}

node = key.next;

}

if (!node.HasValue)

{

value = default;

return false;

}

value = node.Value;

return true;

}

public IEnumerator<KeyValuePair<string, T>> GetEnumerator()

{

throw new System.NotImplementedException();

}

IEnumerator IEnumerable.GetEnumerator()

{

return GetEnumerator();

}

public void Add(KeyValuePair<string, T> item)

{

throw new System.NotImplementedException();

}

public void Clear()

{

throw new System.NotImplementedException();

}

public bool Contains(KeyValuePair<string, T> item)

{

throw new System.NotImplementedException();

}

public void CopyTo(KeyValuePair<string, T>[] array, int arrayIndex)

{

throw new System.NotImplementedException();

}

public bool Remove(KeyValuePair<string, T> item)

{

throw new System.NotImplementedException();

}

public int Count { get; }

public bool IsReadOnly { get; }

}

}