AuroraRuntime/Include/auROXTL/auContainerUtils.hpp

/***
    Copyright (C) 2022 J Reece Wilson (a/k/a "Reece"). All rights reserved.

    File: auContainerUtils.hpp
    Date: 2022-2-1
    File: AuroraUtils.hpp
    File: auROXTLUtils.hpp
    Date: 2021-6-9
    Author: Reece
***/
#pragma once

#include <auROXTL/auTupleUtils.hpp>

namespace __audetail
{
    template <class T>
    struct AuHascapacity
    {
        template <class C> static constexpr AuTrueType  Test(decltype(&C::capacity));
        template <class C> static constexpr AuFalseType Test(...);
        using type = decltype(Test<T>(0));
    };

    template <class T>
    constexpr inline bool AuHascapacity_v = AuHascapacity<T>::type::value;

    template <class T>
    struct AuHasreserve
    {
        template <class C> static constexpr AuTrueType  Test(decltype(&C::reserve));
        template <class C> static constexpr AuFalseType Test(...);
        using type = decltype(Test<T>(0));
    };

    template <class T>
    constexpr inline bool AuHasreserve_v = AuHasreserve<T>::type::value;

    template <class T>
    constexpr inline bool AuIsPreallocatable_v = AuHascapacity_v<T> && AuHasreserve_v<T>;

    template <class T>
    struct AuHastry_emplace
    {
        template <class C> static constexpr AuTrueType  Test(decltype(&C::try_emplace));
        template <class C> static constexpr AuFalseType Test(...);
        using type = decltype(Test<T>(0));
    };

    template <class T>
    constexpr inline bool AuHastry_emplace_v = false;// <T>::type::value;

    template <class T>
    struct AuHasemplace
    {
        template <class C> static constexpr AuTrueType  Test(decltype(&C::emplace));
        template <class C> static constexpr AuFalseType Test(...);
        using type = decltype(Test<T>(0));
    };

    template <class T>
    constexpr inline bool AuHasemplace_v = true;//AuHasemplace<T>::type::value;

    template <class T>
    struct AuHasfind
    {
        template <class C> static constexpr AuTrueType  Test(decltype(static_cast<C::const_iterator(C:: *)(const C::key_type &) const>(&C::find)));
        template <class C> static constexpr AuTrueType  Test(decltype(static_cast<C::const_iterator(C:: *)(const C::element_type &) const>(&C::find)));
        template <class C> static constexpr AuFalseType Test(...);
        using type = decltype(Test<T>(0));
    };

    template <class T>
    constexpr inline bool AuHasfind_v = AuHasfind<T>::type::value;

    template <class T>
    struct AuHasend
    {
        template <class C> static constexpr AuTrueType  Test(decltype(static_cast<C::const_iterator(C:: *)() const>(&C::end)));
        template <class C> static constexpr AuFalseType Test(...);
        using type = decltype(Test<T>(0));
    };

    template <class T>
    constexpr inline bool AuHasend_v = AuHasend<T>::type::value;
}

template <class T, bool all>
inline bool _AuRemoveIfBase(T &in, const AuPredicate<const AuToValueType_t<T> &> &predicate);

template <class T>
inline bool AuRemoveAllIf(T &in, const AuPredicate<const AuToValueType_t<T> &> &predicate)
{
    return _AuRemoveIfBase<T, true>(in, predicate);
}

template <class T>
inline bool AuRemoveIf(T &in, const AuPredicate<const AuToValueType_t<T> &> &predicate)
{
    return _AuRemoveIfBase<T, false>(in, predicate);
}

template <class T, typename Z>
inline void AuRemove(T &in, const Z &type)
{
    auto itr = in.find(type);
    if (itr == in.end())
    {
        return;
    }
    in.erase(itr);
}

template <class T>
inline void AuRemoveRange(T &in, AuUInt index, AuUInt length)
{
    if (index + length > in.size())
    {
        return;
    }

    auto begin = in.begin();
    auto end   = begin;

    std::advance(begin, index);
    std::advance(end, index + length);

    while (begin != end)
    {
        in.erase(begin++);
    }
}

template <class T>
inline bool AuTryRemoveRange(T &in, AuUInt index, AuUInt length)
{
    AUROXTL_COMMODITY_TRY
    {
        if (index + length > in.size())
        {
            return false;
        }

        auto begin = in.begin();
        auto end = begin;

        std::advance(begin, index);
        std::advance(end, index + length);

        while (begin != end)
        {
            in.erase(begin++);
        }
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }

    return true;
}

template <class Map, class Key, class Value, AU_TEMPLATE_ENABLE_WHEN(__audetail::AuHasfind_v<Map>)>
inline bool AuTryFind(Map &map, const Key &key, Value *&ptr)
{
    auto itr = map.find(key);
    if (itr != map.end())
    {
        ptr = &itr->second;
        return true;
    }
    else
    {
        ptr = nullptr;
        return false;
    }
}

template <class Map, class Key, typename Value>
inline bool AuTryFind(Map *map, const Key &key, Value *&ptr)
{
    return AuTryFind(*map, key, ptr);
}

template <AuUInt N, typename List, class Key>
inline auto AuTryFindByTupleN(List &list, const Key &key)
{
    for (auto itr = list.begin(); itr != list.end(); )
    {
        if (AuGet<N>(*itr) == key)
        {
            return itr;
        }
        else
        {
            itr++;
        }
    }
    return list.end();
}

template <class Range, class Key, AU_TEMPLATE_ENABLE_WHEN(!__audetail::AuHasfind_v<Range>)>
inline bool AuExists(const Range &a, const Key &key)
{
    return std::find(a.begin(), a.end(), key) != a.end();
}

template <class Map, class Key, AU_TEMPLATE_ENABLE_WHEN(__audetail::AuHasfind_v<Map>)>
inline bool AuExists(const Map &map, const Key &key)
{
    auto itr = map.find(key);
    if (itr != map.end())
    {
        return true;
    }
    else
    {
        return false;
    }
}

template <class Map, class Key>
inline bool AuExists(const Map *map, const Key &key)
{
    return AuExists(*map, key);
}

template <class Container>
inline bool AuTryClear(Container &container)
{
    container.clear();
    return true;
}

template <class Range, class Key, AU_TEMPLATE_ENABLE_WHEN(!__audetail::AuHasfind_v<Range>)>
inline bool AuTryRemove(Range &list, const Key &key)
{
    auto itr = std::find(list.begin(), list.end(), key);
    if (itr != list.end())
    {
        list.erase(itr);
        return true;
    }
    else
    {
        return false;
    }
}

template <class Map, class Key, AU_TEMPLATE_ENABLE_WHEN(__audetail::AuHasfind_v<Map>)>
inline bool AuTryRemove(Map &map, const Key &key)
{
    auto itr = map.find(key);
    if (itr != map.end())
    {
        map.erase(itr);
        return true;
    }
    else
    {
        return false;
    }
}

template <class Map, class Key>
inline bool AuTryRemove(Map *map, const Key &key)
{
    return AuTryRemove(*map, key);
}

template <AuUInt N, typename List, class Key>
inline bool AuTryRemoveByTupleN(List &list, const Key &key)
{
    for (auto itr = list.begin(); itr != list.end(); )
    {
        if (AuGet<N>(*itr) == key)
        {
            itr = list.erase(itr);
            return true;
        }
        else
        {
            itr++;
        }
    }
    
    return false;
}

template <class Container, typename Key_t, typename Type_t>
inline bool AuTryInsert(Container &container, Key_t &&key, Type_t &&value)
{
    AUROXTL_COMMODITY_TRY
    {
        auto itr = container.find(key);
        if (itr == container.end())
        {
        #if defined(_AURORA_NULLEXPT_USE_TRY_EMPLACE_AFTER_FIND)
            if constexpr (__audetail::AuHastry_emplace_v<Container>)
            {
                auto [iterator, success] = container.try_emplace(AuMove(key), AuMove(value));
                return success;
            }
            else
        #endif
            if constexpr (__audetail::AuHasemplace_v<Container>)
            {
                container.emplace(AuMove(key), AuMove(value));
                return true;
            }
            else
            {
                container.insert(AuMakePair(AuMove(key), AuMove(value)));
            }
        }
        else
        {
            itr->second = value;
        }
        return true;
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class Container, typename Key_t, typename Type_t>
inline bool AuTryInsert(Container &container, const Key_t &key, Type_t &&value)
{
    AUROXTL_COMMODITY_TRY
    {
        auto itr = container.find(key);
        if (itr == container.end())
        {
        #if defined(_AURORA_NULLEXPT_USE_TRY_EMPLACE_AFTER_FIND)
            if constexpr (__audetail::AuHastry_emplace_v<Container>)
            {
                auto [iterator, success] = container.try_emplace(key, AuMove(value));
                return success;
            }
            else
        #endif
            if constexpr (__audetail::AuHasemplace_v<Container>)
            {
                container.emplace(key, AuMove(value));
                return true;
            }
            else
            {
                container.insert(AuMakePair(key, AuMove(value)));
            }
        }
        else
        {
            itr->second = value;
        }
        return true;
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class Container>
inline bool AuContainerExpandOne(Container &container)
{
    auto required = container.size() + 1;
    if (container.capacity() >= required)
    {
        return true;
    }
    
    container.reserve(required);
    return container.capacity() >= required;
}

template <class Container>
inline bool AuContainerExpandOne(Container *container)
{
    return AuContainerExpandOne(*container);
}

template <class Container, typename Value, AU_TEMPLATE_ENABLE_WHEN(!__audetail::AuHasend_v<Container>)>
inline bool AuTryInsert(Container &container, const Value &value)
{
    AUROXTL_COMMODITY_TRY
    {
        if constexpr (__audetail::AuIsPreallocatable_v<AuRemoveReference_t<Container>>)
        {
            if (!AuContainerExpandOne(container))
            {
                return false;
            }
        }
        
        container.insert(AuReference(value));

        return true;
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class Container, typename Value, AU_TEMPLATE_ENABLE_WHEN(!__audetail::AuHasend_v<Container>)>
inline bool AuTryInsert(Container &container, Value &&value)
{
    AUROXTL_COMMODITY_TRY
    {
        if constexpr (__audetail::AuIsPreallocatable_v<AuRemoveReference_t<Container>>)
        {
            if (!AuContainerExpandOne(container))
            {
                return false;
            }
        }

        container.insert(AuMove(value));

        return true;
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class Container, typename Value, AU_TEMPLATE_ENABLE_WHEN(__audetail::AuHasend_v<Container>)>
inline bool AuTryInsert(Container &container, Value &&value)
{
    AUROXTL_COMMODITY_TRY
    {
        if constexpr (__audetail::AuIsPreallocatable_v<AuRemoveReference_t<Container>>)
        {
            if (!AuContainerExpandOne(container))
            {
                return false;
            }
        }

        container.insert(container.end(), AuMove(value));

        return true;
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class Container, typename Value, AU_TEMPLATE_ENABLE_WHEN(__audetail::AuHasend_v<Container>)>
inline bool AuTryInsert(Container &container, const Value &value)
{
    AUROXTL_COMMODITY_TRY
    {
        if constexpr (__audetail::AuIsPreallocatable_v<AuRemoveReference_t<Container>>)
        {
            if (!AuContainerExpandOne(container))
            {
                return false;
            }
        }
        
        container.insert(container.end(), value);

        return true;
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class Map, class Value>
inline bool AuTryInsert(const Map *map, Value &&value)
{
    return AuTryInsert(*map, AuMove(value));
}

template <class Map, class Value>
inline bool AuTryInsert(const Map *map, const Value &value)
{
    return AuTryInsert(*map, value);
}

namespace Aurora::Memory
{
    struct ByteBuffer;
}

template <class T>
inline bool AuTryResize(T &list, AuUInt length)
{
    AUROXTL_COMMODITY_TRY
    {
        if constexpr (AuIsSame_v<T, Aurora::Memory::ByteBuffer>)
        {
            return list.Resize(length);
        }
        else
        {
            list.resize(length);
            return true;
        }
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class T>
inline bool AuTryDownsize(T &list, AuUInt length)
{
    AUROXTL_COMMODITY_TRY
    {
        if constexpr (AuIsSame_v<T, Aurora::Memory::ByteBuffer>)
        {
            if (!list.Resize(length))
            {
                return false;
            }

            list.GC();
            return true;
        }
        else
        {
            list.resize(length);
            list.shrink_to_fit();
            return true;
        }
    }
    AUROXTL_COMMODITY_CATCH
    {
        return false;
    }
}

template <class T, bool all>
inline bool _AuRemoveIfBase(T &in, const AuPredicate<const AuToValueType_t<T> &> &predicate)
{
    bool retOne {};

    for (auto itr = in.begin(); itr != in.end(); )
    {
        if (predicate(*itr))
        {
            itr = in.erase(itr);
            if constexpr (!all)
            {
                return true;
            }

            retOne = true;
        }
        else
        {
            itr++;
        }
    }

    // optimization hint
    if constexpr (all) return retOne;
    return {};
}