//
// Created by william on 17/05/24.
//

#include "pattern_table.h"
#include "ppu.h"
#include "../gui/canvas.h"
#include "../gui/gui.h"

void pt_debug() {
    Canvas *canvas = gui_get_canvas(WINDOW_ID_PATTERN);

    for (int palette = 0; palette < 2; palette++) {
        address palette_addr = palette * 0x1000;
        int palette_canvas_offset = palette * (PATTERN_TABLE_WIDTH * PATTERN_TILE_SIZE);

        for (int y = 0; y < PATTERN_TABLE_WIDTH; y++) {
            for (int x = 0; x < PATTERN_TABLE_WIDTH; x++) {
                address tile_addr = palette_addr + (x + y * PATTERN_TABLE_WIDTH) * PATTERN_TILE_MEM_SIZE;

                for (int tile_y = 0; tile_y < PATTERN_TILE_SIZE; tile_y++) {
                    byte p1_data = ppu_read(tile_addr + tile_y);
                    byte p2_data = ppu_read(tile_addr + tile_y + PATTERN_TILE_SIZE);

                    for (int tile_x = 0; tile_x < PATTERN_TILE_SIZE; tile_x++) {
                        byte bitmask = 1 << (PATTERN_TILE_SIZE - tile_x - 1);
                        byte p1_byte = p1_data & bitmask;
                        byte p2_byte = p2_data & bitmask;

                        Pixel pixel;
                        if (p1_byte && p2_byte) {
                            pixel.r = 255;
                            pixel.g = 255;
                            pixel.b = 255;
                        } else if (p2_byte) {
                            pixel.r = 255;
                            pixel.g = 0;
                            pixel.b = 0;
                        } else if (p1_byte) {
                            pixel.r = 0;
                            pixel.g = 255;
                            pixel.b = 255;
                        } else {
                            pixel.r = 0;
                            pixel.g = 0;
                            pixel.b = 0;
                        }

                        int canvas_x = x * PATTERN_TILE_SIZE + tile_x;
                        int canvas_y = y * PATTERN_TILE_SIZE + tile_y + palette_canvas_offset;
                        canvas_draw_pos(canvas, pixel, canvas_x, canvas_y);
                    }
                }
            }
        }
    }
}