/*
 * FindBugs - Find bugs in Java programs
 * Copyright (C) 2003-2005 William Pugh
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package edu.umd.cs.findbugs.workflow;

import java.io.IOException;
import java.util.Map;
import java.util.TreeMap;

import org.dom4j.DocumentException;

import edu.umd.cs.findbugs.BugCollection;
import edu.umd.cs.findbugs.BugInstance;
import edu.umd.cs.findbugs.DetectorFactoryCollection;
import edu.umd.cs.findbugs.PackageStats;
import edu.umd.cs.findbugs.Project;
import edu.umd.cs.findbugs.SortedBugCollection;
import edu.umd.cs.findbugs.PackageStats.ClassStats;
import edu.umd.cs.findbugs.util.ClassName;

/**
 * Java main application to compute update a historical bug collection with
 * results from another build/analysis.
 * 
 * @author William Pugh
 */

public class CountByPackagePrefix {

	/**
	 * 
	 */
	private static final String USAGE = "Usage: <cmd> "
			+ " <prefixLength> [<bugs.xml>]";

	public static void main(String[] args) throws IOException,
			DocumentException {

		DetectorFactoryCollection.instance();
		if (args.length != 1 && args.length != 2) {
			System.out.println(USAGE);
			return;
		}

		int prefixLength = Integer.parseInt(args[0]);
		Project project = new Project();
		BugCollection origCollection = new SortedBugCollection();
		if (args.length == 1)
		  origCollection.readXML(System.in, project);
		else
			origCollection.readXML(args[1], project);
		Map<String, Integer> map = new TreeMap<String,Integer>();
		Map<String, Integer> ncss = new TreeMap<String,Integer>();
		
		for(BugInstance b : origCollection.getCollection()) {
			String prefix = ClassName.extractPackagePrefix(b.getPrimaryClass().getPackageName(), prefixLength);
			Integer v = map.get(prefix);
			if (v == null)
				map.put(prefix,1);
			else map.put(prefix,v+1);
		}
		for(PackageStats ps : origCollection.getProjectStats().getPackageStats()) {
			String prefix  = ClassName.extractPackagePrefix(ps.getPackageName(), prefixLength);

			Integer v = ncss.get(prefix);
			if (v == null)
				ncss.put(prefix, ps.size());
			else 
				ncss.put(prefix, v + ps.size());
			
		}
		for(Map.Entry<String,Integer> e : map.entrySet()) {
			String prefix = e.getKey();
			int warnings = e.getValue();
			if (warnings == 0) 
				continue;
			Integer v = ncss.get(prefix);
			if (v == null || v.intValue() == 0)
				v = 1;

			int density = warnings * 1000000 / v;
			if (warnings < 3 || v < 2000)
				System.out.printf("%4s %4d %4d %s\n"," ", warnings, v/1000, prefix);
			else
				System.out.printf("%4d %4d %4d %s\n",density, warnings, v/1000, prefix);
		}
		

	}
}
