//MAIN SHIT
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URL;
import java.util.ArrayDeque;
import java.util.Iterator;
import java.util.Queue;

public class Loader {
    public static byte[] loadAsset(String localPath, ObjectReturn<String> retreveUrl, String name){
        return loadAsset(localPath, retreveUrl, name, true);
    }
    public static byte[] loadAsset(String localPath, ObjectReturn<String> retreveUrl, String name, boolean shouldSaveToFile){
        File local=new File(localPath);
        try{
            System.out.println("Loading "+name+"...");

            FileInputStream in=new FileInputStream(local);
            Queue<Byte> buff=new ArrayDeque<>();
            byte[] b={0},actual;
            while(in.read(b)>-1)buff.add(b[0]);
            in.close();
            actual=new byte[buff.size()];
            Iterator<Byte> buf=buff.iterator();
            for(int i=0;i<actual.length;i++){
                actual[i]=buf.next();
            }


            System.out.println(name+" loaded!");
            return actual;
        }catch(IOException e1){
            System.out.println(name+" not found. Loading from internet...");
            try{
                URL src=new URL(retreveUrl.process());
                InputStream in=src.openStream();

                Queue<Byte> buff=new ArrayDeque<>();
                byte[] b={0},actual;
                while(in.read(b)>-1)buff.add(b[0]);
                in.close();
                actual=new byte[buff.size()];
                Iterator<Byte> buf=buff.iterator();
                for(int i=0;i<actual.length;i++){
                    actual[i]=buf.next();
                }
                System.out.println(name+" loaded!");
                if(shouldSaveToFile){
                    System.out.println("Saving "+name+" to local file...");
                    local.createNewFile();
                    OutputStream out=new FileOutputStream(local);
                    out.write(actual, 0, actual.length);
                    out.close();
                    System.out.println("Saved!");
                }
                return actual;
            }catch(IOException e2){
                System.out.println(name+" failed to load!");
                return null;
            }
        }

    }
}


public interface ObjectReturn<T>{
    public abstract T process();
}

//EXAMPLE
try{
    setIconImage(ImageIO.read(new ByteArrayInputStream(Loader.loadAsset("LapisAnimatorIcon.png", ()->"http://i.imgur.com/idpF9O7.png", "Icon"))));
}catch(Exception e1){
    e1.printStackTrace();
}
try{
    byte[] data=Loader.loadAsset("ComfortaaFont.tff", ()->{
        String src=new String(Loader.loadAsset("ew7futgaw0 ertgwzegfydvfu[cb xa3/", ()->"https://fonts.googleapis.com/css?family=Comfortaa", "Comfortaa-font-src-getter-dummy",false));
        return src.substring(src.lastIndexOf("url(")+4, src.lastIndexOf(") "));
    }, "ComfortaaFont.tff");

    GraphicsEnvironment ge=GraphicsEnvironment.getLocalGraphicsEnvironment();
    ge.registerFont(Font.createFont(Font.TRUETYPE_FONT, new ByteArrayInputStream(data)));
}catch(Exception e1){
    e1.printStackTrace();
    System.err.println("CRITICAL ASSET FAILED TO LOAD!");
    System.out.println("Exiting!");
    System.exit(0);
}