package org.cateproject.view.mock;
   
   import java.io.File;
   import java.io.IOException;
   import java.util.ArrayList;
   import java.util.List;
   
   import javax.servlet.http.HttpServletResponse;
   
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.velocity.tools.view.tools.LinkTool;
  import org.cateproject.view.tools.CATELinkTool;
  
  import eu.etaxonomy.cdm.model.common.CdmBase;
  import eu.etaxonomy.cdm.model.common.ICdmBase;
  import eu.etaxonomy.cdm.model.common.User;
  
  public class MockLinkTool extends CATELinkTool {
  	private static Log log = LogFactory.getLog(MockLinkTool.class);
  	private File root;
  	
  	public void setRoot(File root) {
  		this.root = root;
  	}
  	
  	public void setResponse(HttpServletResponse response) {
  		this.response = response;
  	}
  	
  	private String replaceDoWithHtml(String original) {
  		if(original.endsWith("do")) {
  			return original.substring(0, original.length() - 2) + "html";
  		} else {
  			return original;
  		}
  	}
  	@Override
  	public LinkTool setSublist(String resource, ICdmBase cdmBase, String subList) {
  		StringBuffer stringBuffer = new StringBuffer();
  		stringBuffer.append(resource);
  		stringBuffer.append("/" + subList + ".html");
  		return addAuditEvent(setRelative(stringBuffer.toString()),null);
  	}
  	
  	@Override
  	public LinkTool setResource(String resource, ICdmBase cdmBase) {
  		StringBuffer stringBuffer = new StringBuffer();
  		stringBuffer.append(resource);
  		stringBuffer.append("/index.html");
  		return addAuditEvent(setRelative(stringBuffer.toString()),null);
  	}
  	
  	@Override
  	public LinkTool setList(String resource) {
  		StringBuffer stringBuffer = new StringBuffer();
  		stringBuffer.append(resource + "/list.html");
  		return addAuditEvent(setRelative(stringBuffer.toString()),null);
  	}
  	
  	@Override
  	public String toString() {
  		String string = super.toString();
  		
  		if(string.startsWith("/")) {
  			return string.substring(1);
  		} else {
  			return string;
  		}
  	}
  	
  	@Override
  	public LinkTool setURI(String uri) {
  		return super.setURI(replaceDoWithHtml(uri));
  	}
  	
  	@Override
      public LinkTool setRelative(String uri)
      {
  		try {
  	      if(uri.startsWith("http://")) return (LinkTool)super.absolute(uri);
  	      
            String resource = "target/generated-sources/mock" + uri;
            File resourceFile = new File(replaceDoWithHtml(resource));
            return (LinkTool)super.uri(getRelativePath(root,resourceFile));
  		} catch(Exception e) {
  			return null;
  		}
      }
      
      public String getContextURL() {
      	return ".";
      }
      
      public static String getRelativePath(File home,File f){
  		File r;
  		List<String> homelist;
  		List<String> filelist;
  		String s;
         try {
 		    homelist = getPathList(home);
 		    filelist = getPathList(f);
 		    s = matchPathLists(homelist,filelist);
         } catch(IOException ioe) {
         	return f.getName();
         }
 
 		return s;
 	}
 	
 	private static List<String> getPathList(File f) throws IOException {
 		List<String> l = new ArrayList<String>();
 		File r;
 		
 		r = f.getCanonicalFile();
 		while(r != null) {
 			l.add(r.getName());
 			r = r.getParentFile();
 		}
 		
 		return l;
 	}
 	
 	private static String matchPathLists(List<String> r,List<String> f) {
 		int i;
 		int j;
 		String s;
 		// start at the beginning of the lists
 		// iterate while both lists are equal
 		s = "";
 		i = r.size()-1;
 		j = f.size()-1;
 
 		// first eliminate common root
 		while((i >= 0)&&(j >= 0)&&(r.get(i).equals(f.get(j)))) {
 			i--;
 			j--;
 		}
 
 		// for each remaining level in the home path, add a ..
 		for(;i>=0;i--) {
 			s += ".." + "/";
 		}
 
 		// for each level in the file path, add the path
 		for(;j>=1;j--) {
 			s += f.get(j) + "/";
 		}
 
 		// file name
 		s += f.get(j);
 		return s;
 	}
 }