package org.simantics.scl.compiler.internal.decompiler.impl;

import java.io.IOException;
import java.io.Writer;

import org.simantics.scl.compiler.internal.decompilation.IDecompiler;
import org.simantics.scl.compiler.runtime.MutableClassLoader;

import com.strobel.assembler.metadata.Buffer;
import com.strobel.assembler.metadata.ITypeLoader;
import com.strobel.core.VerifyArgument;
import com.strobel.decompiler.Decompiler;
import com.strobel.decompiler.DecompilerSettings;
import com.strobel.decompiler.PlainTextOutput;

public class DecompilerImpl implements IDecompiler {
    @Override
    public void decompile(MutableClassLoader classLoader, String className, Writer output) {
        VerifyArgument.isNonNegative(3.0, "asd");
        DecompilerSettings settings = DecompilerSettings.javaDefaults();
        settings.setTypeLoader(new ITypeLoader() {
            @Override
            public boolean tryLoadType(String internalName, Buffer buffer) {
                byte[] bytes = classLoader.getBytes(internalName.replace('/', '.'));
                if(bytes == null)
                    return false;
                
                buffer.reset(bytes.length);
                System.arraycopy(bytes, 0, buffer.array(), 0, bytes.length);
                return true;
            }
        });
        Decompiler.decompile(
                className,
                new PlainTextOutput(output),
                settings);
        try {
            output.flush();
        } catch (IOException e) {
        }
    }
    
}