package com.planet_ink.coffee_mud.WebMacros;

import com.planet_ink.coffee_web.interfaces.*;
import com.planet_ink.coffee_mud.core.interfaces.*;
import com.planet_ink.coffee_mud.core.*;
import com.planet_ink.coffee_mud.core.collections.*;
import com.planet_ink.coffee_mud.Abilities.interfaces.*;
import com.planet_ink.coffee_mud.Areas.interfaces.*;
import com.planet_ink.coffee_mud.Behaviors.interfaces.*;
import com.planet_ink.coffee_mud.CharClasses.interfaces.*;
import com.planet_ink.coffee_mud.Libraries.interfaces.*;
import com.planet_ink.coffee_mud.Common.interfaces.*;
import com.planet_ink.coffee_mud.Exits.interfaces.*;
import com.planet_ink.coffee_mud.Items.interfaces.*;
import com.planet_ink.coffee_mud.Locales.interfaces.*;
import com.planet_ink.coffee_mud.MOBS.interfaces.*;
import com.planet_ink.coffee_mud.Races.interfaces.*;

import java.util.*;

/*
   Copyright 2003-2020 Bo Zimmerman

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

	   http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
*/
public class FileNext extends StdWebMacro
{
	@Override
	public String name()
	{
		return "FileNext";
	}

	@Override
	public boolean isAdminMacro()
	{
		return true;
	}

	public String trimSlash(String path)
	{
		path=path.trim();
		while(path.startsWith("/"))
			path=path.substring(1);
		while(path.endsWith("/"))
			path=path.substring(0,path.length()-1);
		return path;
	}

	@Override
	public String runMacro(final HTTPRequest httpReq, final String parm, final HTTPResponse httpResp)
	{
		final java.util.Map<String,String> parms=parseParms(parm);
		String path=httpReq.getUrlParameter("PATH");
		if(path==null)
			path="";
		final String last=httpReq.getUrlParameter("FILE");
		final MOB M = Authenticate.getAuthenticatedMob(httpReq);
		if(M==null)
			return "[authentication error]";
		if(parms.containsKey("RESET"))
		{
			if(last!=null)
				httpReq.removeUrlParameter("FILE");
			return "";
		}
		final String fileKey="CMFSFILE_"+trimSlash(path);
		final String pathKey="DIRECTORYFILES_"+trimSlash(path);
		CMFile directory=(CMFile)httpReq.getRequestObjects().get(fileKey);
		if(directory==null)
		{
			directory=new CMFile(path,M);
			httpReq.getRequestObjects().put(fileKey, directory);
		}
		final XVector<String> fileList=new XVector<String>();
		if((directory.canRead())&&(directory.isDirectory()))
		{
			httpReq.addFakeUrlParameter("PATH",directory.getVFSPathAndName());
			CMFile[] dirs=(CMFile[])httpReq.getRequestObjects().get(pathKey);
			if(dirs==null)
			{
				dirs=CMFile.getFileList(path,M,false,true,null);
				Arrays.sort(dirs, new Comparator<CMFile>()
				{
					@Override
					public int compare(final CMFile o1, final CMFile o2)
					{
						if(o1.isDirectory())
						{
							if(o2.isDirectory())
								return o1.getName().compareToIgnoreCase(o2.getName());
							return -1;
						}
						else
						{
							if(!o2.isDirectory())
								return o1.getName().compareToIgnoreCase(o2.getName());
							return 1;
						}
					}
				});
				httpReq.getRequestObjects().put(pathKey, dirs);
				for(final CMFile file : dirs)
				{
					final String filepath=path.endsWith("/")?(path+file.getName()):(path+"/"+file.getName());
					httpReq.getRequestObjects().put("CMFSFILE_"+trimSlash(filepath), file);
				}
			}
			for (final CMFile dir : dirs)
				fileList.addElement(dir.getName());
		}

		String lastID="";
		for(int q=0;q<fileList.size();q++)
		{
			final String name=fileList.elementAt(q);
			if((last==null)||((last.length()>0)&&(last.equals(lastID))&&(!name.equals(lastID))))
			{
				httpReq.addFakeUrlParameter("FILE",name);
				return "";
			}
			lastID=name;
		}
		httpReq.addFakeUrlParameter("FILE","");
		if(parms.containsKey("EMPTYOK"))
			return "<!--EMPTY-->";
		return " @break@";
	}

}
