package org.hedgewars.hedgeroid.netplay;

import java.io.UnsupportedEncodingException;

import com.sun.jna.DefaultTypeMapper;

import com.sun.jna.FromNativeContext;

import com.sun.jna.FromNativeConverter;

import com.sun.jna.Native;

import com.sun.jna.Pointer;

import com.sun.jna.ToNativeContext;

import com.sun.jna.ToNativeConverter;

import com.sun.jna.TypeConverter;

import com.sun.jna.TypeMapper;

public class FrontlibTypeMapper extends DefaultTypeMapper {

    public static final TypeMapper INSTANCE = new FrontlibTypeMapper();

    protected FrontlibTypeMapper() {

        addTypeConverter(Boolean.class, new BooleanConverter());

		addToNativeConverter(String.class, new StringToNativeConverter());

		addFromNativeConverter(String.class, new StringFromNativeConverter());

    }

}

class BooleanConverter implements TypeConverter {

    public Class<Byte> nativeType() {

        return Byte.class;

    }

	public Object fromNative(Object value, FromNativeContext context) {

		return ((Byte)value).intValue() != 0 ? Boolean.TRUE : Boolean.FALSE;

	}

	public Object toNative(Object value, ToNativeContext context) {

		return Byte.valueOf((byte)(Boolean.TRUE.equals(value) ? 1 : 0));

	}

}

class StringToNativeConverter implements ToNativeConverter {

	public byte[] toNative(Object value, ToNativeContext context) {

    	try {

			return value==null ? null : Native.toByteArray((String)value, "UTF-8");

		} catch (UnsupportedEncodingException e) {

			throw new AssertionError(e); // Never happens

		}

	}

	public Class<byte[]> nativeType() {

		return byte[].class;

	}

}

class StringFromNativeConverter implements FromNativeConverter {

	public String fromNative(Object value, FromNativeContext context) {

		Pointer p = (Pointer)value;

		if(p==null) {

			return null;

		}

		int i=0;

		while(p.getByte(i) != 0) {

			i++;

		}

    	try {

			return new String(p.getByteArray(0, i), "UTF-8");

		} catch (UnsupportedEncodingException e) {

			throw new AssertionError(e); // Never happens

		}

	}

	public Class<Pointer> nativeType() {

		return Pointer.class;

	}

}