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

    This file was auto-generated!

    It contains the basic framework code for a JUCE plugin processor.

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

#include "PluginProcessor.h"
#include "PluginEditor.h"

//==============================================================================
SpaceDistortionAudioProcessor::SpaceDistortionAudioProcessor()
#ifndef JucePlugin_PreferredChannelConfigurations
     : AudioProcessor (BusesProperties()
                     #if ! JucePlugin_IsMidiEffect
                      #if ! JucePlugin_IsSynth
                       .withInput  ("Input",  AudioChannelSet::stereo(), true)
                      #endif
                       .withOutput ("Output", AudioChannelSet::stereo(), true)
                     #endif
                       )
#endif
, processorDelay (new PluginParameter (Identifier ("delaytime"),
                                       0.f,
                                       0.f,
                                       15.f,
                                       "Delay Time",
                                       String(),
                                       2,
                                       [this] (float actualValue) {}))
, mainProcessor (new AudioProcessorGraph())     // instantiate main AudioProcessorGraph
{
    
    //==============================================================================
    // Initialisation of delay
    addParameter (processorDelay);
}


SpaceDistortionAudioProcessor::~SpaceDistortionAudioProcessor()
{
}

//==============================================================================
const String SpaceDistortionAudioProcessor::getName() const
{
    return JucePlugin_Name;
}

bool SpaceDistortionAudioProcessor::acceptsMidi() const
{
   #if JucePlugin_WantsMidiInput
    return true;
   #else
    return false;
   #endif
}

bool SpaceDistortionAudioProcessor::producesMidi() const
{
   #if JucePlugin_ProducesMidiOutput
    return true;
   #else
    return false;
   #endif
}

bool SpaceDistortionAudioProcessor::isMidiEffect() const
{
   #if JucePlugin_IsMidiEffect
    return true;
   #else
    return false;
   #endif
}

double SpaceDistortionAudioProcessor::getTailLengthSeconds() const
{
    return 0.0;
}

int SpaceDistortionAudioProcessor::getNumPrograms()
{
    return 1;   // NB: some hosts don't cope very well if you tell them there are 0 programs,
                // so this should be at least 1, even if you're not really implementing programs.
}

int SpaceDistortionAudioProcessor::getCurrentProgram()
{
    return 0;
}

void SpaceDistortionAudioProcessor::setCurrentProgram (int index)
{
}

const String SpaceDistortionAudioProcessor::getProgramName (int index)
{
    return {};
}

void SpaceDistortionAudioProcessor::changeProgramName (int index, const String& newName)
{
}

//==============================================================================
void SpaceDistortionAudioProcessor::prepareToPlay (double sampleRate, int samplesPerBlock)
{
    // Use this method as the place to do any pre-playback
    // initialisation that you need..
    
    //==============================================================================
    // Inform the AudioProcessorGraph on the number of I/O channels
    mainProcessor->setPlayConfigDetails (getMainBusNumInputChannels(),
                                         getMainBusNumOutputChannels(),
                                         sampleRate,
                                         samplesPerBlock);
    
    mainProcessor->prepareToPlay (sampleRate, samplesPerBlock);
    
    initialiseGraph();
}

void SpaceDistortionAudioProcessor::releaseResources()
{
    // When playback stops, you can use this as an opportunity to free up any
    // spare memory, etc.
    mainProcessor->releaseResources();
}

#ifndef JucePlugin_PreferredChannelConfigurations
bool SpaceDistortionAudioProcessor::isBusesLayoutSupported (const BusesLayout& layouts) const
{
  #if JucePlugin_IsMidiEffect
    ignoreUnused (layouts);
    return true;
  #else
    // This is the place where you check if the layout is supported.
    // In this template code we only support mono or stereo.
    if (layouts.getMainOutputChannelSet() != AudioChannelSet::mono()
     && layouts.getMainOutputChannelSet() != AudioChannelSet::stereo())
        return false;

    // This checks if the input layout matches the output layout
   #if ! JucePlugin_IsSynth
    if (layouts.getMainOutputChannelSet() != layouts.getMainInputChannelSet())
        return false;
   #endif

    return true;
  #endif
}
#endif

void SpaceDistortionAudioProcessor::processBlock (AudioBuffer<float>& buffer, MidiBuffer& midiMessages)
{
    ScopedNoDenormals noDenormals;
    auto totalNumInputChannels  = getTotalNumInputChannels();
    auto totalNumOutputChannels = getTotalNumOutputChannels();

    // In case we have more outputs than inputs, this code clears any output
    // channels that didn't contain input data, (because these aren't
    // guaranteed to be empty - they may contain garbage).
    // This is here to avoid people getting screaming feedback
    // when they first compile a plugin, but obviously you don't need to keep
    // this code if your algorithm always overwrites all the output channels.
    for (auto i = totalNumInputChannels; i < totalNumOutputChannels; ++i)
        buffer.clear (i, 0, buffer.getNumSamples());

    // This is the place where you'd normally do the guts of your plugin's
    // audio processing...
    // Make sure to reset the state if your inner loop is processing
    // the samples and the outer loop is handling the channels.
    // Alternatively, you can process the samples with the channels
    // interleaved by keeping the same state.
    mainProcessor->processBlock (buffer, midiMessages);
    
    updateGraph();
    

}

//==============================================================================
bool SpaceDistortionAudioProcessor::hasEditor() const
{
    return true; // (change this to false if you choose to not supply an editor)
}

AudioProcessorEditor* SpaceDistortionAudioProcessor::createEditor()
{
    return new SpaceDistortionAudioProcessorEditor (*this);
}

//==============================================================================
void SpaceDistortionAudioProcessor::getStateInformation (MemoryBlock& destData)
{
    // You should use this method to store your parameters in the memory block.
    // You could do that either as raw data, or use the XML or ValueTree classes
    // as intermediaries to make it easy to save and load complex data.
}

void SpaceDistortionAudioProcessor::setStateInformation (const void* data, int sizeInBytes)
{
    // You should use this method to restore your parameters from this memory block,
    // whose contents will have been created by the getStateInformation() call.
}

//==============================================================================
// Helper functions implementations
void SpaceDistortionAudioProcessor::initialiseGraph()
{
    mainProcessor->clear();
    
    audioInputNode  = mainProcessor->addNode (new AudioGraphIOProcessor (AudioGraphIOProcessor::audioInputNode));
    audioOutputNode = mainProcessor->addNode (new AudioGraphIOProcessor (AudioGraphIOProcessor::audioOutputNode));
    midiInputNode   = mainProcessor->addNode (new AudioGraphIOProcessor (AudioGraphIOProcessor::midiInputNode));
    midiOutputNode  = mainProcessor->addNode (new AudioGraphIOProcessor (AudioGraphIOProcessor::midiOutputNode));
    
    connectAudioNodes();
    connectMidiNodes();
}

void SpaceDistortionAudioProcessor::connectAudioNodes()
{
    for (int channel = 0; channel < 2; ++channel)
        mainProcessor->addConnection ({ { audioInputNode->nodeID,  channel },
            { audioOutputNode->nodeID, channel } });
}

void SpaceDistortionAudioProcessor::connectMidiNodes()
{
    mainProcessor->addConnection ({ { midiInputNode->nodeID,  AudioProcessorGraph::midiChannelIndex },
        { midiOutputNode->nodeID, AudioProcessorGraph::midiChannelIndex } });
}

void SpaceDistortionAudioProcessor::updateGraph()
{
    ReferenceCountedArray<Node> slots;
    slots.add (delayNode);
    
    auto slot = slots.getUnchecked (0);
    
    slots.set (0, mainProcessor->addNode (new DelayProcessor()));
    
    for (auto connection : mainProcessor->getConnections())
            mainProcessor->removeConnection (connection);
        
        ReferenceCountedArray<Node> activeSlots;
        
        for (auto slot : slots)
        {
            if (slot != nullptr)
            {
                activeSlots.add (slot);
                
                slot->getProcessor()->setPlayConfigDetails (getMainBusNumInputChannels(),
                                                            getMainBusNumOutputChannels(),
                                                            getSampleRate(), getBlockSize());
            }
        }
        
        if (activeSlots.isEmpty())
        {
            connectAudioNodes();
        }
        else
        {
            for (int i = 0; i < activeSlots.size() - 1; ++i)
            {
                for (int channel = 0; channel < 2; ++channel)
                    mainProcessor->addConnection ({ { activeSlots.getUnchecked (i)->nodeID,      channel },
                        { activeSlots.getUnchecked (i + 1)->nodeID,  channel } });
            }
            
            for (int channel = 0; channel < 2; ++channel)
            {
                mainProcessor->addConnection ({ { audioInputNode->nodeID,         channel },
                    { activeSlots.getFirst()->nodeID, channel } });
                mainProcessor->addConnection ({ { activeSlots.getLast()->nodeID,  channel },
                    { audioOutputNode->nodeID,        channel } });
            }
        }
        
        connectMidiNodes();
        
        for (auto node : mainProcessor->getNodes())
            node->getProcessor()->enableAllBuses();
}

//==============================================================================
// This creates new instances of the plugin..
AudioProcessor* JUCE_CALLTYPE createPluginFilter()
{
    return new SpaceDistortionAudioProcessor();
}