#include "color.h"

struct console_color colors[] = { //Standard VGA colors
	{0, 0, 0,	"30"}, //Black
	{170, 0, 0,	"31"}, //red
	{0, 170, 0, 	"32"}, //Green
	{170, 85, 0,	"33"}, //Brown
	{0, 0, 170, 	"34"}, //blue
	{170, 0, 170, 	"35"}, //Magenta
	{0, 170, 170, 	"36"}, //Cyan
	{170,170,170,	"37"}, //Grey
	{85,85,85, 	"30;1"},
	{255,85,85, 	"31;1"},
	{85,255,85, 	"32;1"},
	{255,255,85, 	"33;1"},
	{85,85,255, 	"34;1"},
	{255,85,255,	"35;1"},
	{85,255,255,	"36;1"},
	{255, 255, 255,	"37;1"}
};

uint8_t rgb_luminance(uint8_t R, uint8_t G, uint8_t B)
{
	uint8_t ret;

	ret = sqrt( 0.299*pow(R,2) + 0.587*pow(G,2) + 0.114*pow(B,2) ); //(char)(R+R+B+G+G+G)/6;

	return ret;
}

char* calc_col(uint8_t R, uint8_t G, uint8_t B)
{
	unsigned int nearest_num = 0;
	uint8_t a2[3];
	a2[0] = colors[0].R;
	a2[1] = colors[0].G; 
	a2[2] = colors[0].B;

	uint8_t a1[] = {R,G,B};

	//Normalize the color
	//Does not really work all that well
	/*while(a1[0] < 255 && a1[1] < 255 && a1[2] < 255)
	{
		a1[0]++;
		a1[1]++;
		a1[2]++;
	}*/

	float nearest_val = distance( a1, a2 );
	
	for( unsigned int i = 1; i < _COLORS_SIZE; i++)
	{
		a2[0] = colors[i].R;
		a2[1] = colors[i].G; 
		a2[2] = colors[i].B;

		float dist = distance(a1, a2);
		if(dist < nearest_val){
			nearest_num = i;
			nearest_val = dist;
		}
	}
	return colors[ nearest_num ].no;
}
char* calc_col_ansi(uint8_t R, uint8_t G, uint8_t B)
{
	int num = 36 * (R/51) + 6 * (G/51) + (B/51);
	char *c = malloc(9);
	snprintf( c, 6, "38;5;" );
	snprintf( c + 5, 4, "%i", num + 16 );

	return c;
}
char* calc_bg_col_ansi(uint8_t R, uint8_t G, uint8_t B)
{
	int num = 36 * (R/51) + 6 * (G/51) + (B/51);
	char *c = malloc(9);
	snprintf( c, 6, "48;5;" );
	snprintf( c + 5, 4, "%i", num + 16 );

	return c;
}