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

    File: auOptionalEx.hpp
    Date: 2022-3-23
    Author: Reece
***/
#pragma once

#include "auCopyMoveUtils.hpp"
#include "auHashUtils.hpp"

template <class T>
struct AuOptionalEx
{
    bool hasValue;
    T type;

    AuOptionalEx() : hasValue(false)
    {}

    AuOptionalEx(T &value) : type(value), hasValue(true)
    {}

    AuOptionalEx(T &&value) : type(value), hasValue(true)
    {}

    T &Value()
    {
        return type;
    }

    const T &Value() const
    {
        return type;
    }

    template <class U>
    constexpr T ValueOr(U &&defaultValue) const &
    {
        return bool(*this) ? value() : static_cast<T>(AuForward<U>(defaultValue));

    }
    template <class U>
    constexpr T ValueOr(U &&defaultValue) &&
    {
        return bool(*this) ? AuMove(value()) : static_cast<T>(AuForward<U>(defaultValue));
    }

    bool HasValue() const
    {
        return this->hasValue;
    }

    operator bool() const
    {
        return this->hasValue;
    }

    T &value()
    {
        return this->type;
    }

    const T &value() const
    {
        return this->type;
    }

    bool has_value() const
    {
        return this->hasValue;
    }

    AuUInt HashCode() const
    {
        return AuHashCode(type);
    }

    void Reset()
    {
        this->type = {};
        this->hasValue = {};
    }

    void Swap(AuOptionalEx &&ex)
    {
        AuSwap(this->type, ex.type);
        AuSwap(this->hasValue, ex.hasValue);
    }
};