package sandbox.changeset;

import java.io.File;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.EnumMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class ChangeSet{
		
	private final String[] keyList;
	private final Status[] statusList;

	private final EnumMap<Status, ArrayList<String>> byStatus;
	
	public ChangeSet(Map<String,Status> change_set){
		keyList = change_set.keySet().toArray(new String[]{});
		Arrays.sort(keyList);
		statusList = new Status[keyList.length];
		byStatus = new EnumMap<Status, ArrayList<String>>(Status.class);
		for(Status s : Status.values())
			byStatus.put(s, new ArrayList<String>(keyList.length));
		for (int i = 0; i < keyList.length; i++) {
			statusList[i] = change_set.get(keyList[i]);
			keyList[i] = toClassName(keyList[i]);
			byStatus.get(statusList[i]).add(keyList[i]);
		}		
	}
	
	@Override
	public String toString() {
		// TODO Auto-generated method stub
		return super.toString();
	}
	
	public void printTo(PrintStream out,Status... order){
		for(Status s : order){
			for(String id : byStatus.get(s)){
				out.print(s); out.print(" ");
				out.println(id);
			}
		}
		out.format("# %d changed, %d new, %d old, %d same, (total: %d)\n",
				byStatus.get(Status.CHANGED).size(),
				byStatus.get(Status.NEW).size(),
				byStatus.get(Status.OLD).size(),
				byStatus.get(Status.SAME).size(),
				keyList.length
				);
	}
	
	public List<String> getClasses(Set<Status> status_filter){
		ArrayList<String> ret = new ArrayList<String>(keyList.length);
		for(Status s:status_filter){
			ret.addAll(byStatus.get(s));
		}
		return ret;
	}
	
	private String toClassName(final String s){
		//".class".length() == 6
		return s.substring(0, s.length()-6).replace(File.separatorChar, '.');
	}
	
}