#include "collide.h"
#include "draw.h"
#include "shared_define.h"

#define SPIKE_SCAM 2

char collide(int x, int y, char level[], char tile)
{
	if ((level[(int)(x/16) + (int)(y/16) * LEVEL_WIDTH] == tile) ||
	(level[(int)(x/16) + (int)((y+PLAYER_H)/16) * LEVEL_WIDTH] == tile) ||
	(level[(int)((x+PLAYER_W)/16) + (int)((y+PLAYER_H)/16) *
	LEVEL_WIDTH] == tile) || (level[(int)((x+PLAYER_W)/16) + (int)(y/16) *
	LEVEL_WIDTH] == tile)) return 1;
	return 0;
}

char collide_spike(int x, int y, char level[])
{
	return (collide_point(x + SPIKE_SCAM, y + SPIKE_SCAM, level, 'v') ||
			collide_point(x + PLAYER_W - SPIKE_SCAM, y + SPIKE_SCAM, level, 'v') ||
			collide_point(x + SPIKE_SCAM, y + PLAYER_H - SPIKE_SCAM, level, 'v') ||
			collide_point(x + PLAYER_W - SPIKE_SCAM, y + PLAYER_H - SPIKE_SCAM, level, 'v'));
}

char collide_point(int x, int y, char level[], char tile)
{
	return (level[(int)(x/16) + (int)(y/16) * LEVEL_WIDTH] == tile);
}

char collide_solid(int x, int y, char level[], char polarity,
	char test_semi_solid)
{
	char collided;
	if (polarity) collided = collide(x, y, level, 'b');
	else collided = collide(x, y, level, 'r');
	if (!collided && test_semi_solid && ((y + PLAYER_H) % 16) <= 5)
	{
		collided = (collide_point(x, y + PLAYER_H, level, '/') ||
			collide_point(x + PLAYER_W, y + PLAYER_H, level, '/'));
	}
	return (collided ||
		collide(x, y, level, '0') ||
		collide(x, y, level, '1') ||
		collide(x, y, level, '^') ||
		collide(x, y, level, 'd') ||
		collide(x, y, level, '~'));
}

char collide_and_erase(int x, int y, char level[], char tile)
{
	char collided = 0;
	if (collide_point(x, y, level, tile))
	{
		erase_tile(x, y, level);
		collided = 1;
	}
	if (collide_point(x + PLAYER_W, y, level, tile))
	{
		erase_tile(x + PLAYER_W, y, level);
		collided = 1;
	}
	if (collide_point(x, y + PLAYER_H, level, tile))
	{
		erase_tile(x, y + PLAYER_H, level);
		collided = 1;
	}
	if (collide_point(x + PLAYER_W, y + PLAYER_H, level, tile))
	{
		erase_tile(x + PLAYER_W, y + PLAYER_H, level);
		collided = 1;
	}
	return collided;
}