/*
  Copyright (c) 2021 Alex Diener
  
  This software is provided 'as-is', without any express or implied
  warranty. In no event will the authors be held liable for any damages
  arising from the use of this software.
  
  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:
  
  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
  
  Alex Diener alex@ludobloom.com
*/

#include "audiosynth/MusicPattern.h"
#include "utilities/IOUtilities.h"

#define stemobject_implementation MusicPattern

stemobject_vtable_begin();
stemobject_vtable_entry(dispose);
stemobject_vtable_end();

MusicPattern * MusicPattern_create(unsigned int measureCount, unsigned int meterSize, unsigned int meterBasicNote) {
	stemobject_create_implementation(init, measureCount, meterSize, meterBasicNote)
}

bool MusicPattern_init(MusicPattern * self, unsigned int measureCount, unsigned int meterSize, unsigned int meterBasicNote) {
	call_super(init, self);
	self->meterSize = meterSize;
	self->meterBasicNote = meterBasicNote;
	self->measureCount = measureCount;
	if (measureCount == 0) {
		self->measures = NULL;
	} else {
		self->measures = calloc(measureCount, sizeof(*self->measures));
	}
	return true;
}

void MusicPattern_dispose(MusicPattern * self) {
	for (unsigned int measureIndex = 0; measureIndex < self->measureCount; measureIndex++) {
		free(self->measures[measureIndex].notes);
	}
	free(self->measures);
	call_super_virtual(dispose, self);
}

MusicPattern * MusicPattern_copy(MusicPattern * self) {
	stemobject_copy_implementation(initCopy)
}

void MusicPattern_initCopy(MusicPattern * self, MusicPattern * original) {
	call_super(init, self);
	self->meterSize = original->meterSize;
	self->meterBasicNote = original->meterBasicNote;
	self->measureCount = original->measureCount;
	if (self->measureCount == 0) {
		self->measures = NULL;
	} else {
		self->measures = malloc(self->measureCount * sizeof(*self->measures));
		for (unsigned int measureIndex = 0; measureIndex < self->measureCount; measureIndex++) {
			self->measures[measureIndex].noteCount = original->measures[measureIndex].noteCount;
			if (self->measures[measureIndex].noteCount == 0) {
				self->measures[measureIndex].notes = NULL;
			} else {
				self->measures[measureIndex].notes = malloc(self->measures[measureIndex].noteCount * sizeof(*self->measures[measureIndex].notes));
				memcpy(self->measures[measureIndex].notes, original->measures[measureIndex].notes, self->measures[measureIndex].noteCount * sizeof(*self->measures[measureIndex].notes));
			}
		}
	}
}

void MusicPattern_addNote(MusicPattern * self, unsigned int measureIndex, MusicPattern_note note) {
	if (measureIndex >= self->measureCount) {
		self->measures = realloc(self->measures, (measureIndex + 1) * sizeof(*self->measures));
		for (unsigned int emptyMeasureIndex = self->measureCount; emptyMeasureIndex <= measureIndex; emptyMeasureIndex++) {
			self->measures[emptyMeasureIndex].noteCount = 0;
			self->measures[emptyMeasureIndex].notes = NULL;
		}
		self->measureCount = measureIndex + 1;
	}
	self->measures[measureIndex].notes = realloc(self->measures[measureIndex].notes, (self->measures[measureIndex].noteCount + 1) * sizeof(*self->measures[measureIndex].notes));
	unsigned int insertionIndex = self->measures[measureIndex].noteCount;
	for (unsigned int noteIndex = 0; noteIndex < self->measures[measureIndex].noteCount; noteIndex++) {
		MusicPattern_note compareNote = self->measures[measureIndex].notes[noteIndex];
		int beatComparison = ifrac_cmp(note.beat, compareNote.beat);
		if (beatComparison < 0 || (beatComparison == 0 && note.note < compareNote.note)) {
			insertionIndex = noteIndex;
			break;
		}
	}
	for (unsigned int noteIndex = self->measures[measureIndex].noteCount; noteIndex > insertionIndex; noteIndex--) {
		self->measures[measureIndex].notes[noteIndex] = self->measures[measureIndex].notes[noteIndex - 1];
	}
	self->measures[measureIndex].notes[insertionIndex] = note;
	self->measures[measureIndex].noteCount++;
}

void MusicPattern_addMeasure(MusicPattern * self, MusicPattern_measure measure) {
	self->measures = realloc(self->measures, (self->measureCount + 1) * sizeof(*self->measures));
	self->measures[self->measureCount].noteCount = measure.noteCount;
	self->measures[self->measureCount].notes = memdup(measure.notes, self->measures[self->measureCount].noteCount * sizeof(*measure.notes));
	self->measureCount++;
}

void MusicPattern_deleteMeasureAtIndex(MusicPattern * self, unsigned int measureIndex) {
	if (measureIndex >= self->measureCount) {
		return;
	}
	self->measureCount--;
	free(self->measures[measureIndex].notes);
	for (; measureIndex < self->measureCount; measureIndex++) {
		self->measures[measureIndex] = self->measures[measureIndex + 1];
	}
}