#include <tice.h>
#include <graphx.h>

#include "draw.h"
#include "main.h"
#include "items.h"

#include "gfx/gfx.h"
#include "gfx/tiles.h"
#define SPRITES_COUNT ITEM_COUNT


uint8_t draw_tileset;
uint8_t draw_palette = 0;


void draw_init_palette(void) {
	gfx_SetPalette(draw_palette ? grayscale_palette : global_palette, sizeof_global_palette, 0);
}

void draw_init(void) {
	gfx_Begin();
	draw_init_palette();
	// gfx_FillScreen(0); // not actually required
	gfx_SetDrawBuffer();
}

void draw_toggle_palette(void) {
	draw_palette = !draw_palette;
	draw_init_palette();	
}

void draw_exit(void) {
	gfx_End();
}

void draw_sprite(uint8_t item, uint8_t spriteX, uint8_t spriteY) {
	// if (item > ITEM_COUNT) return; // not actually required

	gfx_Sprite_NoClip(
		(gfx_sprite_t*) tiles_tiles_data[(draw_tileset*SPRITES_COUNT)+item],
		spriteX*SPRITES_SIZE,
		spriteY*SPRITES_SIZE
	);
}

void draw_view(uint8_t* level_data, uint8_t level_width, uint8_t level_height, uint8_t viewX, uint8_t viewY) {
	uint16_t spriteX, spriteY;
	for (spriteX = 0; spriteX < SCREEN_SPRITES_X; spriteX++) {
		uint8_t cellX = viewX + spriteX;
		for (spriteY = 0; spriteY < SCREEN_SPRITES_Y; spriteY++) {
			uint8_t cellY = viewY + spriteY;
			uint8_t item = ITEM_DIRT;
			if (cellX < level_width && cellY < level_height) {
				item = level_data[cellY * level_width + cellX] & ITEM_MASK;
			}
			draw_sprite(item, spriteX, spriteY);
		}
	}
	gfx_SwapDraw();
}