#include <stdlib.h>
#include "image/transformations.h"

unsigned int*
ppm_flip_h(const unsigned int* buf, const PPM img)
{
	unsigned int* flip = malloc(img.len * sizeof(unsigned int));
	if (!flip)
	{
		return NULL;
	}
	int idx = 0;
	for (int i = 0; i < img.height; i++)
	{
		for (int k = img.width - 1; k >= 0; k--)
		{
			flip[idx] = buf[(i * img.width) + k];
			idx++;
		}
	}

	return flip;
}

unsigned int*
ppm_flip_v(const unsigned int* buf, const PPM img)
{
	unsigned int* flip = malloc(img.len * sizeof(unsigned int));
	if (!flip)
	{
		return NULL;
	}

	int idx = 0;
	for (int i = img.height - 1; i >= 0; i--)
	{
		for (int k = 0; k < img.width; k++)
		{
			flip[idx] = buf[(i * img.width) + k];
			idx++;
		}
	}

	return flip;
}

unsigned int*
u32_rotate(const unsigned int* buf, PPM* m_img, const int len)
{
	unsigned int* mask = malloc(len * sizeof(unsigned int));
	int old_width = m_img->width;
	int old_height = m_img->height;
	for (int row = 0; row < old_height; row++)
	{
		for (int col = 0; col < old_width; col++)
		{
			int new_height = col;
			int new_width = (old_height - 1 - row);

			mask[(new_height * old_height) + new_width] =
			    buf[(row * old_width) + col];
		}
	}
	m_img->width = old_height;
	m_img->height = old_width;
	return mask;
}