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

    This file contains the basic framework code for a JUCE plugin processor.

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

#pragma once

#include <JuceHeader.h>

//==============================================================================
/**
*/
class DelayPluginAudioProcessor  : public juce::AudioProcessor
{
public:
    //==============================================================================
    DelayPluginAudioProcessor();
    ~DelayPluginAudioProcessor() override;

    //==============================================================================
    void prepareToPlay (double sampleRate, int samplesPerBlock) override;
    void releaseResources() override;

   #ifndef JucePlugin_PreferredChannelConfigurations
    bool isBusesLayoutSupported (const BusesLayout& layouts) const override;
   #endif

    void processBlock (juce::AudioBuffer<float>&, juce::MidiBuffer&) override;

    //==============================================================================
    juce::AudioProcessorEditor* createEditor() override;
    bool hasEditor() const override;

    //==============================================================================
    const juce::String getName() const override;

    bool acceptsMidi() const override;
    bool producesMidi() const override;
    bool isMidiEffect() const override;
    double getTailLengthSeconds() const override;

    //==============================================================================
    int getNumPrograms() override;
    int getCurrentProgram() override;
    void setCurrentProgram (int index) override;
    const juce::String getProgramName (int index) override;
    void changeProgramName (int index, const juce::String& newName) override;

    //==============================================================================
    void getStateInformation (juce::MemoryBlock& destData) override;
    void setStateInformation (const void* data, int sizeInBytes) override;
    
    void fillDelayBuffer(int channel, const int iBufferLength, const int iDelayBufferLength, const float* fBufferData, const float* fDelayBufferData);
    void getFromDelayBuffer(juce::AudioBuffer<float>& buffer, int channel, const int iBufferLength, const int iDelayBufferLength, const float* fBufferData, const float* fDelayBufferData);
    void feedbackDelay(int channel, const int iBufferLength, const int iDelayBufferLength, float* fDryBuffer);

    void updateFilter(float cutoff, float res);
    
    float fFeedbackGain { 0.0 };
    float fDelayTime { 1000.0 };
    
private:
    juce::AudioBuffer<float> delayBuffer;
    int iWritePosition { 0 };
    int iSampleRate = { 44100 };
    
    juce::dsp::ProcessorDuplicator<juce::dsp::IIR::Filter<float>, juce::dsp::IIR::Coefficients<float>> lowPassFilter;
    
    //==============================================================================
    JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (DelayPluginAudioProcessor)
};