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

   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.

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

namespace juce
{

//==============================================================================
/**
    This maintains a list of known AudioPluginFormats.

    @see AudioPluginFormat

    @tags{Audio}
*/
class JUCE_API  AudioPluginFormatManager
{
public:
    //==============================================================================
    AudioPluginFormatManager();

    /** Destructor. */
    ~AudioPluginFormatManager();

    //==============================================================================
    /** Adds the set of available standard formats, e.g. VST. */
    void addDefaultFormats();

    //==============================================================================
    /** Returns the number of types of format that are available.
        Use getFormat() to get one of them.
    */
    int getNumFormats() const;

    /** Returns one of the available formats.
        @see getNumFormats
    */
    AudioPluginFormat* getFormat (int index) const;

    /** Returns a list of all the registered formats. */
    Array<AudioPluginFormat*> getFormats() const;

    //==============================================================================
    /** Adds a format to the list.
        The object passed in will be owned and deleted by the manager.
    */
    void addFormat (AudioPluginFormat*);

    //==============================================================================
    /** Tries to load the type for this description, by trying all the formats
        that this manager knows about.

        If it can't load the plugin, it returns nullptr and leaves a message in the
        errorMessage string.

        If you intend to instantiate a AudioUnit v3 plug-in then you must either
        use the non-blocking asynchronous version below - or call this method from a
        thread other than the message thread and without blocking the message
        thread.
    */
    std::unique_ptr<AudioPluginInstance> createPluginInstance (const PluginDescription& description,
                                                               double initialSampleRate, int initialBufferSize,
                                                               String& errorMessage) const;

    /** Tries to asynchronously load the type for this description, by trying
        all the formats that this manager knows about.

        The caller must supply a callback object which will be called when
        the instantiation has completed.

        If it can't load the plugin then the callback function will be called
        passing a nullptr as the instance argument along with an error message.

        The callback function will be called on the message thread so the caller
        must not block the message thread.

        The callback object will be deleted automatically after it has been
        invoked.

        The caller is responsible for deleting the instance that is passed to
        the callback function.

        If you intend to instantiate a AudioUnit v3 plug-in then you must use
        this non-blocking asynchronous version - or call the synchronous method
        from an auxiliary thread.
    */
    void createPluginInstanceAsync (const PluginDescription& description,
                                    double initialSampleRate, int initialBufferSize,
                                    AudioPluginFormat::PluginCreationCallback callback);

    /** Tries to create an ::ARAFactoryWrapper for this description.

        The result of the operation will be wrapped into an ARAFactoryResult,
        which will be passed to a callback object supplied by the caller.

        The operation may fail, in which case the callback will be called with
        with a result object where ARAFactoryResult::araFactory.get() will return
        a nullptr.

        In case of success the returned ::ARAFactoryWrapper will ensure that
        modules required for the correct functioning of the ARAFactory will remain
        loaded for the lifetime of the object.
    */
    void createARAFactoryAsync (const PluginDescription& description,
                                AudioPluginFormat::ARAFactoryCreationCallback callback) const;

    /** Checks that the file or component for this plugin actually still exists.
        (This won't try to load the plugin)
    */
    bool doesPluginStillExist (const PluginDescription&) const;

private:
    //==============================================================================
    AudioPluginFormat* findFormatForDescription (const PluginDescription&, String& errorMessage) const;

    OwnedArray<AudioPluginFormat> formats;

    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (AudioPluginFormatManager)
};

} // namespace juce
