import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;

public final class GenerateBlockTextures {
    private static final Path OUT = Path.of("src/main/resources/assets/blocodex/textures/block");

    private static final int BODY = 0xFFE0D7C6;
    private static final int BODY_MID = 0xFFCABFAC;
    private static final int BODY_DARK = 0xFF80776A;
    private static final int BODY_LIGHT = 0xFFF8F0DD;
    private static final int OUTLINE = 0xFF2A2723;
    private static final int BLACK = 0xFF050706;
    private static final int SCREEN = 0xFF0B2A25;
    private static final int SCREEN_GLOW = 0xFF5BFFB5;
    private static final int SLOT = 0xFF191611;
    private static final int RED = 0xFFC8403C;
    private static final int GREEN = 0xFF5DC462;
    private static final int YELLOW = 0xFFE3C34B;
    private static final int WHITE = 0xFFEAE3D5;
    private static final int METAL = 0xFF9FA5A2;

    private GenerateBlockTextures() {
    }

    public static void main(String[] args) throws Exception {
        Files.createDirectories(OUT);
        write("computer_front.png", front());
        write("computer_right.png", right());
        write("computer_left.png", left());
        write("computer_back.png", back());
        write("computer_top.png", top());
        write("computer_bottom.png", bottom());
    }

    private static BufferedImage front() {
        BufferedImage image = base();
        rect(image, 2, 2, 12, 10, OUTLINE);
        rect(image, 3, 3, 11, 9, BLACK);
        rect(image, 4, 4, 10, 8, SCREEN);
        set(image, 4, 4, 0xFF17463C);
        set(image, 9, 7, SCREEN_GLOW);
        set(image, 8, 7, SCREEN_GLOW);
        set(image, 5, 5, 0xFF2E836D);

        rect(image, 2, 11, 10, 13, BODY_LIGHT);
        line(image, 3, 12, 9, 12, SLOT);
        set(image, 8, 11, 0xFF6DA6C8);
        set(image, 9, 11, 0xFF3B657D);

        rect(image, 12, 11, 14, 13, GREEN);
        set(image, 12, 11, 0xFFA9F1A7);
        rect(image, 14, 11, 15, 13, RED);

        line(image, 3, 14, 7, 14, SLOT);
        line(image, 9, 14, 13, 14, SLOT);
        set(image, 2, 14, BODY_DARK);
        return image;
    }

    private static BufferedImage right() {
        BufferedImage image = base();
        rect(image, 2, 2, 14, 14, BODY_MID);
        line(image, 3, 3, 13, 3, BODY_LIGHT);
        line(image, 13, 3, 13, 13, BODY_DARK);

        line(image, 3, 5, 7, 5, BODY_DARK);
        line(image, 3, 8, 7, 8, BODY_DARK);
        line(image, 3, 11, 7, 11, BODY_DARK);
        rca(image, 10, 4, YELLOW);
        rca(image, 10, 8, WHITE);
        rca(image, 10, 12, RED);

        screw(image, 3, 3);
        screw(image, 3, 12);
        return image;
    }

    private static BufferedImage left() {
        BufferedImage image = base();
        rect(image, 2, 2, 14, 14, BODY_MID);
        line(image, 3, 3, 13, 3, BODY_LIGHT);
        line(image, 13, 3, 13, 13, BODY_DARK);

        line(image, 3, 5, 12, 5, SLOT);
        line(image, 3, 7, 12, 7, SLOT);
        line(image, 3, 9, 12, 9, SLOT);
        line(image, 3, 11, 12, 11, SLOT);
        set(image, 12, 5, BODY_LIGHT);
        set(image, 12, 7, BODY_LIGHT);
        set(image, 12, 9, BODY_LIGHT);
        set(image, 12, 11, BODY_LIGHT);

        screw(image, 3, 3);
        screw(image, 12, 12);
        return image;
    }

    private static BufferedImage back() {
        BufferedImage image = base();
        rect(image, 2, 2, 14, 14, BODY_MID);
        line(image, 3, 3, 13, 3, BODY_LIGHT);

        rect(image, 4, 4, 12, 10, OUTLINE);
        rect(image, 5, 5, 11, 9, BLACK);
        set(image, 7, 6, METAL);
        set(image, 9, 6, METAL);
        set(image, 8, 8, BODY_DARK);

        line(image, 4, 12, 7, 12, SLOT);
        line(image, 9, 12, 12, 12, SLOT);
        line(image, 4, 14, 12, 14, SLOT);
        screw(image, 3, 3);
        screw(image, 13, 3);
        return image;
    }

    private static BufferedImage top() {
        BufferedImage image = base();
        rect(image, 2, 2, 14, 14, BODY);
        line(image, 3, 3, 13, 3, BODY_LIGHT);
        line(image, 3, 3, 3, 13, BODY_LIGHT);
        line(image, 3, 13, 13, 13, BODY_DARK);
        line(image, 13, 3, 13, 13, BODY_DARK);
        line(image, 5, 6, 11, 6, SLOT);
        line(image, 5, 8, 11, 8, SLOT);
        line(image, 5, 10, 11, 10, SLOT);
        set(image, 12, 12, BODY_LIGHT);
        return image;
    }

    private static BufferedImage bottom() {
        BufferedImage image = base();
        rect(image, 2, 2, 14, 14, BODY_DARK);
        rect(image, 4, 4, 7, 7, OUTLINE);
        rect(image, 10, 4, 13, 7, OUTLINE);
        rect(image, 4, 10, 7, 13, OUTLINE);
        rect(image, 10, 10, 13, 13, OUTLINE);
        line(image, 7, 8, 9, 8, SLOT);
        line(image, 7, 9, 9, 9, SLOT);
        return image;
    }

    private static BufferedImage base() {
        BufferedImage image = new BufferedImage(16, 16, BufferedImage.TYPE_INT_ARGB);
        rect(image, 0, 0, 16, 16, BODY);
        line(image, 0, 0, 15, 0, OUTLINE);
        line(image, 0, 0, 0, 15, OUTLINE);
        line(image, 0, 15, 15, 15, OUTLINE);
        line(image, 15, 0, 15, 15, OUTLINE);
        line(image, 1, 1, 14, 1, BODY_LIGHT);
        line(image, 1, 1, 1, 14, BODY_LIGHT);
        line(image, 1, 14, 14, 14, BODY_DARK);
        line(image, 14, 1, 14, 14, BODY_DARK);
        return image;
    }

    private static void rca(BufferedImage image, int x, int y, int color) {
        set(image, x, y - 1, OUTLINE);
        set(image, x - 1, y, OUTLINE);
        set(image, x, y, color);
        set(image, x + 1, y, OUTLINE);
        set(image, x, y + 1, OUTLINE);
        set(image, x - 1, y - 1, METAL);
    }

    private static void screw(BufferedImage image, int x, int y) {
        set(image, x, y, OUTLINE);
        set(image, x + 1, y, METAL);
        set(image, x, y + 1, METAL);
        set(image, x + 1, y + 1, BODY_DARK);
    }

    private static void rect(BufferedImage image, int x1, int y1, int x2, int y2, int color) {
        for (int y = Math.max(0, y1); y < Math.min(image.getHeight(), y2); y++) {
            for (int x = Math.max(0, x1); x < Math.min(image.getWidth(), x2); x++) {
                image.setRGB(x, y, color);
            }
        }
    }

    private static void line(BufferedImage image, int x1, int y1, int x2, int y2, int color) {
        if (x1 == x2) {
            rect(image, x1, Math.min(y1, y2), x1 + 1, Math.max(y1, y2) + 1, color);
            return;
        }
        if (y1 == y2) {
            rect(image, Math.min(x1, x2), y1, Math.max(x1, x2) + 1, y1 + 1, color);
        }
    }

    private static void set(BufferedImage image, int x, int y, int color) {
        if (x >= 0 && y >= 0 && x < image.getWidth() && y < image.getHeight()) {
            image.setRGB(x, y, color);
        }
    }

    private static void write(String name, BufferedImage image) throws IOException {
        ImageIO.write(image, "png", OUT.resolve(name).toFile());
    }
}