/* 
 * jayDSP, A cross-platform Digital Signal Processing library written in modern C++.
 * Copyright (C) 2025 Jens Ahrensfeld, All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all 
 * copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 * File: delay.hpp
 * Author Jens Ahrensfeld on 26.10.2025.
 */

#ifndef DSP_MULTIDELAY_H
#define DSP_MULTIDELAY_H

#include <iostream>

#include <delay/buffer_multi.hpp>

template<typename T, size_t numCh>
class MultiDelay
{
	dsp::BufferMulti<T, numCh> m_buf;
	int m_delay_spec[numCh];
	uint m_delaySize;

	void print_delays()
	{
		std::cout << "delays" << std::endl;
		for (int i=0; i < numCh; i++)
		{
			std::cout << m_delay_spec[i] << " ";
		}
		std::cout << std::endl;
	}
	public:
	MultiDelay(uint delayCapacity, int delayOffset)
	: m_buf(delayCapacity)
	{
		setDelay(delayCapacity, delayOffset);
	}

	void setDelay(uint delaySize, int delayOffset)
	{
		float delayRagePerWindow = (float)(delaySize-delayOffset)/(float)numCh;

		if (delayRagePerWindow < 0)
		{
			return;
		}

		// Delay spec
		for (int i=0; i < numCh; i++)
		{
			float base_delay = i*delayRagePerWindow + delayOffset;
			float z = (float)rand()/(float)RAND_MAX;
			int delay = (int)(base_delay + z*delayRagePerWindow);

			m_delay_spec[i] = -delay;
		}
		m_delaySize = delaySize;
		print_delays();
	}

	uint getDelay()
	{
		return m_delaySize;
	}

	void process(T in, T out[numCh])
	{
		m_buf = in;
		m_buf.quer(out, m_delay_spec);
		++m_buf;
	}

	void process(T data[numCh])
	{
		m_buf = data;
		m_buf.quer(data, m_delay_spec);
		++m_buf;
	}

	void process(T in[numCh], T out[numCh])
	{
		m_buf = in;
		m_buf.quer(out, m_delay_spec);
		++m_buf;
	}
};

#endif // DSP_MULTIDELAY_H