package com.limegroup.gnutella.stubs;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashSet;
import java.util.Set;

import org.limewire.service.ErrorService;

import com.limegroup.gnutella.FileDesc;
import com.limegroup.gnutella.URN;

@SuppressWarnings("unchecked")
public class FileDescStub extends FileDesc {
    public static final String DEFAULT_URN =
        "urn:sha1:PLSTHIPQGSSZTS5FJUPAKUZWUGYQYPFB";
    public static final URN DEFAULT_SHA1;
    public static final Set DEFAULT_SET;
    public static final int DEFAULT_SIZE = 1126400;
    
    static {
        DEFAULT_SET = new HashSet();
        URN sha1 = null;
        try {
            sha1 = URN.createSHA1Urn(DEFAULT_URN);
        } catch(IOException ioe) {
            ErrorService.error(ioe);
        }
        DEFAULT_SHA1 = sha1;
        DEFAULT_SET.add(DEFAULT_SHA1);
    }
    
    public FileDescStub() {
        this("abc.txt");
    }
    
    public FileDescStub(String name) {
        this(name, DEFAULT_SHA1, 0);
    }
    
    public FileDescStub(String name, URN urn, int index) {
    	super(new File(name), createUrnSet(urn), index);
    }
    
    private static Set createUrnSet(URN urn) {
        Set s = new HashSet();
        s.add(urn);
        return s;
    }

    public InputStream createInputStream() {
        return new InputStream() {
            public int read() {
                return 'a';
            }
            public int read(byte[] b) {
                for(int i=0; i < b.length; i++)
                    b[i] = (byte)'a';
                return b.length;
            }
        };
    }

    public long getFileSize() {
        return DEFAULT_SIZE;
    }
}