/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
   copyrightable work, you agree to the terms of the JUCE End User Licence
   Agreement, and all incorporated terms including the JUCE Privacy Policy and
   the JUCE Website Terms of Service, as applicable, which will bind you. If you
   do not agree to the terms of these agreements, we will not license the JUCE
   framework to you, and you must discontinue the installation or download
   process and cease use of the JUCE framework.

   JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
   JUCE Privacy Policy: https://juce.com/juce-privacy-policy
   JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/

   Or:

   You may also use this code under the terms of the AGPLv3:
   https://www.gnu.org/licenses/agpl-3.0.en.html

   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
   WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

#ifndef DOXYGEN

namespace juce
{

//==============================================================================
/**
    This class is deprecated. You should use std::unique_ptr instead.
*/
template <class ObjectType>
class ScopedPointer
{
public:
    //==============================================================================
    JUCE_BEGIN_IGNORE_DEPRECATION_WARNINGS

    inline ScopedPointer() {}

    inline ScopedPointer (decltype (nullptr)) noexcept {}

    inline ScopedPointer (ObjectType* objectToTakePossessionOf) noexcept
        : object (objectToTakePossessionOf)
    {
    }

    ScopedPointer (ScopedPointer& objectToTransferFrom) noexcept
        : object (objectToTransferFrom.release())
    {
    }

    inline ~ScopedPointer()         { reset(); }

    ScopedPointer& operator= (ScopedPointer& objectToTransferFrom)
    {
        if (this != objectToTransferFrom.getAddress())
        {
            // Two ScopedPointers should never be able to refer to the same object - if
            // this happens, you must have done something dodgy!
            jassert (object == nullptr || object != objectToTransferFrom.object);
            reset (objectToTransferFrom.release());
        }

        return *this;
    }

    ScopedPointer& operator= (ObjectType* newObjectToTakePossessionOf)
    {
        reset (newObjectToTakePossessionOf);
        return *this;
    }

    ScopedPointer (ScopedPointer&& other) noexcept  : object (other.object)
    {
        other.object = nullptr;
    }

    ScopedPointer& operator= (ScopedPointer&& other) noexcept
    {
        reset (other.release());
        return *this;
    }

    //==============================================================================
    inline operator ObjectType*() const noexcept                                    { return object; }
    inline ObjectType* get() const noexcept                                         { return object; }
    inline ObjectType& operator*() const noexcept                                   { return *object; }
    inline ObjectType* operator->() const noexcept                                  { return object; }

    void reset()
    {
        auto* oldObject = object;
        object = {};
        ContainerDeletePolicy<ObjectType>::destroy (oldObject);
    }

    void reset (ObjectType* newObject)
    {
        if (object != newObject)
        {
            auto* oldObject = object;
            object = newObject;
            ContainerDeletePolicy<ObjectType>::destroy (oldObject);
        }
        else
        {
            // You're trying to reset this ScopedPointer to itself! This will work here as ScopedPointer does an equality check
            // but be aware that std::unique_ptr won't do this and you could end up with some nasty, subtle bugs!
            jassert (newObject == nullptr);
        }
    }

    void reset (ScopedPointer& newObject)
    {
        reset (newObject.release());
    }

    ObjectType* release() noexcept  { auto* o = object; object = {}; return o; }

    //==============================================================================
    void swapWith (ScopedPointer<ObjectType>& other) noexcept
    {
        // Two ScopedPointers should never be able to refer to the same object - if
        // this happens, you must have done something dodgy!
        jassert (object != other.object || this == other.getAddress() || object == nullptr);

        std::swap (object, other.object);
    }

    inline ObjectType* createCopy() const { return createCopyIfNotNull (object); }

private:
    //==============================================================================
    ObjectType* object = nullptr;

    const ScopedPointer* getAddress() const noexcept  { return this; } // Used internally to avoid the & operator

   #if ! JUCE_MSVC  // (MSVC can't deal with multiple copy constructors)
    ScopedPointer (const ScopedPointer&) = delete;
    ScopedPointer& operator= (const ScopedPointer&) = delete;
   #endif

    JUCE_END_IGNORE_DEPRECATION_WARNINGS
};

//==============================================================================
JUCE_BEGIN_IGNORE_DEPRECATION_WARNINGS

template <typename ObjectType1, typename ObjectType2>
bool operator== (ObjectType1* pointer1, const ScopedPointer<ObjectType2>& pointer2) noexcept
{
    return pointer1 == pointer2.get();
}

template <typename ObjectType1, typename ObjectType2>
bool operator!= (ObjectType1* pointer1, const ScopedPointer<ObjectType2>& pointer2) noexcept
{
    return pointer1 != pointer2.get();
}

template <typename ObjectType1, typename ObjectType2>
bool operator== (const ScopedPointer<ObjectType1>& pointer1, ObjectType2* pointer2) noexcept
{
    return pointer1.get() == pointer2;
}

template <typename ObjectType1, typename ObjectType2>
bool operator!= (const ScopedPointer<ObjectType1>& pointer1, ObjectType2* pointer2) noexcept
{
    return pointer1.get() != pointer2;
}

template <typename ObjectType1, typename ObjectType2>
bool operator== (const ScopedPointer<ObjectType1>& pointer1, const ScopedPointer<ObjectType2>& pointer2) noexcept
{
    return pointer1.get() == pointer2.get();
}

template <typename ObjectType1, typename ObjectType2>
bool operator!= (const ScopedPointer<ObjectType1>& pointer1, const ScopedPointer<ObjectType2>& pointer2) noexcept
{
    return pointer1.get() != pointer2.get();
}

template <class ObjectType>
bool operator== (decltype (nullptr), const ScopedPointer<ObjectType>& pointer) noexcept
{
    return pointer.get() == nullptr;
}

template <class ObjectType>
bool operator!= (decltype (nullptr), const ScopedPointer<ObjectType>& pointer) noexcept
{
    return pointer.get() != nullptr;
}

template <class ObjectType>
bool operator== (const ScopedPointer<ObjectType>& pointer, decltype (nullptr)) noexcept
{
    return pointer.get() == nullptr;
}

template <class ObjectType>
bool operator!= (const ScopedPointer<ObjectType>& pointer, decltype (nullptr)) noexcept
{
    return pointer.get() != nullptr;
}

//==============================================================================
// NB: This is just here to prevent any silly attempts to call deleteAndZero() on a ScopedPointer.
template <typename Type>
void deleteAndZero (ScopedPointer<Type>&)  { static_assert (sizeof (Type) == 12345,
                                                            "Attempt to call deleteAndZero() on a ScopedPointer"); }

JUCE_END_IGNORE_DEPRECATION_WARNINGS

} // namespace juce

#endif
