#pragma once

#include "RBTree.hpp"

namespace Lenyiin
{
    template <class K, class V>
    class Map
    {
        struct MapKeyOfT
        {
            const K &operator()(const std::pair<K, V> &kv)
            {
                return kv.first;
            }
        };

    public:
        typedef typename RBTree<K, std::pair<K, V>, MapKeyOfT>::iterator iterator;
        typedef typename RBTree<K, std::pair<K, V>, MapKeyOfT>::const_iterator const_iterator;

        iterator begin()
        {
            return _tree.begin();
        }

        iterator end()
        {
            return _tree.end();
        }

        const_iterator begin() const
        {
            return _tree.begin();
        }

        const_iterator end() const
        {
            return _tree.end();
        }

        std::pair<iterator, bool> Insert(const std::pair<K, V> &kv)
        {
            return _tree.Insert(kv);
        }

        bool Erase(const K &key)
        {
            return _tree.Erase(key);
        }

        V &operator[](const K &key)
        {
            std::pair<iterator, bool> ret = _tree.Insert(std::make_pair(key, V()));
            return ret.first->second;
        }

        bool IsRBTree()
        {
            return _tree.IsRBTree();
        }

    private:
        RBTree<K, std::pair<K, V>, MapKeyOfT> _tree;
    };
}