package org.richfaces.renderkit;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Set;

import javax.faces.application.FacesMessage;
import javax.faces.application.FacesMessage.Severity;
import javax.faces.component.NamingContainer;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;

import org.ajax4jsf.renderkit.HeaderResourcesRendererBase;
import org.ajax4jsf.resource.InternetResource;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.richfaces.renderkit.html.HtmlRichMessageRenderer;

/**
 * @author Anton Belevich
 *
 */

public abstract class RichMessageBaseRenderer extends HeaderResourcesRendererBase{
	
	protected static final Log log = LogFactory.getLog(HtmlRichMessageRenderer.class);
	
	public static final String NULL_PARAMETER_ERROR_MESSAGE = "null parameter ERROR";
	
	public static final String COMPONENT_NOT_FOUND_IN_VIEW_WARN_MESSAGE = "component not found in the view WARNING";
	
	private static final String ERROR_NAME = "ERROR";
	
	private static final String WARN_NAME = "WARN";
	
	private static final String FATAL_NAME = "FATAL";
	
	private static final String INFO_NAME = "INFO";
	
	private static final String ALL_NAME = "ALL";
	
	protected List acceptLevels = new ArrayList();
	
	
	private final InternetResource[] styles = {getResource("/org/richfaces/renderkit/html/css/msg.css"),getResource("/org/richfaces/renderkit/html/css/msgs.css")};
	
	private InternetResource[] stylesAll = null;
	
	
	protected InternetResource[] getStyles(){
		synchronized (this){
			if(stylesAll == null){
				
				InternetResource[] rsrcs = super.getStyles();
				boolean ignoreSuper = rsrcs == null || rsrcs.length == 0;
				boolean ignoreThis = styles == null || styles.length == 0;
				
				if(ignoreSuper){
					
					if (ignoreThis) {
						stylesAll = new InternetResource[0];	
					} else {
						stylesAll = styles;
					}
					
				}else{
				
					if(ignoreThis){
						stylesAll = rsrcs;
					}else{
						Set rsrcsSet = new java.util.LinkedHashSet();
						for(int i = 0; i < rsrcs.length; i++ ){
							rsrcsSet.add(rsrcs[i]);
						}

						for(int i = 0; i < styles.length; i++ ){
							rsrcsSet.add(styles[i]);
						}
						stylesAll = (InternetResource[]) rsrcsSet.toArray(new InternetResource[rsrcsSet.size()]);
					}
				}
			}
		}
		
		return stylesAll;
	}
		
	protected Iterator getMessageIterator(FacesContext context, String forClientId, UIComponent component) throws IOException{
		
		Iterator msgIter = null;
		
		if(forClientId != null){
			
			if(forClientId.length() != 0){
				
				UIComponent result = findForComponent(context, forClientId,component);
				if (result == null) {
					msgIter = CollectionUtils.EMPTY_COLLECTION.iterator();
				} else {
					msgIter = context.getMessages(result.getClientId(context));
				}
				
			}else{
				msgIter = context.getMessages(null);
			}
			
		}else{
			msgIter = context.getMessages();
		}
				
		return msgIter;
	}
	
	protected void renderMarkerFacet(UIComponent uiMsg, FacesContext context, ResponseWriter writer,FacesMessage facesMsg) throws IOException{

		UIComponent marker = null;
		
		String markerClass = null;
		
		String markerStyle = null;
		
		Severity severity = null;
		
		
		if(facesMsg != null){
			
			severity = facesMsg.getSeverity(); 
			
			if(severity == FacesMessage.SEVERITY_ERROR){
				
				markerClass = (String)uiMsg.getAttributes().get("errorMarkerClass");
				markerStyle = (String)uiMsg.getAttributes().get("errorMarkerStyle");
				marker = uiMsg.getFacet("errorMarker");
					
			}else if (severity == FacesMessage.SEVERITY_FATAL) {
				
				markerClass = (String)uiMsg.getAttributes().get("fatalMarkerClass");
				markerStyle = (String)uiMsg.getAttributes().get("fatalMarkerStyle");
				marker = uiMsg.getFacet("fatalMarker");
				
			}else if (severity == FacesMessage.SEVERITY_INFO) {
				
				markerClass = (String)uiMsg.getAttributes().get("infoMarkerClass");
				markerStyle = (String)uiMsg.getAttributes().get("infoMarkerStyle");
				marker = uiMsg.getFacet("infoMarker");
					
			}else if (severity == FacesMessage.SEVERITY_WARN) {
				
				markerClass = (String)uiMsg.getAttributes().get("warnMarkerClass");
				markerStyle = (String)uiMsg.getAttributes().get("warnMarkerStyle");
				marker = uiMsg.getFacet("warnMarker");
				
			}
			
		}else if(uiMsg.getFacet("passedMarker") != null){
			
			marker = uiMsg.getFacet("passedMarker");
			markerClass = (String) uiMsg.getAttributes().get("markerClass");
			markerStyle = (String) uiMsg.getAttributes().get("markerStyle");
				
		}
		
		if(marker == null){
			return;
		}
		
		if(!marker.isRendered()){
			return;
		}
		
		renderMarkerHtml(uiMsg, marker, context, writer, markerClass, markerStyle);
	}
	
	protected void renderLabel(UIComponent component, FacesContext context, ResponseWriter writer,FacesMessage facesMsg) throws IOException{
		
		String labelClass = null;
		   
		String labelStyle = null;
		   
		String passLabel = null;
		   
		Severity severity = null;
		   
		       
		if(facesMsg != null){
		   
			severity = facesMsg.getSeverity();
			   
			if(severity == FacesMessage.SEVERITY_ERROR){
					
				labelClass = (String)component.getAttributes().get("errorLabelClass");
				labelStyle = (String)component.getAttributes().get("errorLabelStyle");
							
			}else if(severity == FacesMessage.SEVERITY_FATAL){
					
				labelClass = (String)component.getAttributes().get("fatalLabelClass");
				labelStyle = (String)component.getAttributes().get("fatalLabelStyle");
							
			}else if(severity == FacesMessage.SEVERITY_WARN){
					
				labelClass = (String)component.getAttributes().get("warnLabelClass");
				labelStyle = (String)component.getAttributes().get("warnLabelStyle");
							
			}else if(severity == FacesMessage.SEVERITY_INFO){
					
				labelClass = (String)component.getAttributes().get("infoLabelClass");
				labelStyle = (String)component.getAttributes().get("infoLabelStyle");
					
			}
			   
		}else if(component.getAttributes().get("passedLabel") != null){
			
			passLabel = (String) component.getAttributes().get("passedLabel");				
			labelClass = (String) component.getAttributes().get("labelClass");
			labelStyle = (String) component.getAttributes().get("labelStyle");
				
		}

		renderLabelHtml(component, context, writer, facesMsg, labelClass, labelStyle, passLabel);
	}
	
	protected void  outerStyles(UIComponent component, FacesContext context, ResponseWriter writer,FacesMessage facesMsg) throws IOException{
		
		String outerClass = null;
		   
		String outerStyle = null;
		   
		Severity severity = null;
		   
		   
		if(facesMsg != null){
			   
			severity = facesMsg.getSeverity();
			if(severity == FacesMessage.SEVERITY_ERROR){
					
				outerClass = (String)component.getAttributes().get("errorClass");
				outerStyle = (String)component.getAttributes().get("errorStyle");
							
			}else if(severity == FacesMessage.SEVERITY_FATAL){
					
				outerClass = (String)component.getAttributes().get("fatalClass");
				outerStyle = (String)component.getAttributes().get("fatalStyle");
								
			}else if(severity == FacesMessage.SEVERITY_WARN){
					
				outerClass = (String)component.getAttributes().get("warnClass");
				outerStyle = (String)component.getAttributes().get("warnStyle");
							
			}else if(severity == FacesMessage.SEVERITY_INFO){
					
				outerClass = (String)component.getAttributes().get("infoClass");
				outerStyle = (String)component.getAttributes().get("infoStyle");
			}
		}
		
		renderOuterStyles(component, context, writer, outerStyle, outerClass);
		
	}
	
	protected UIComponent findForComponent(FacesContext context, String forClientId, UIComponent component) throws IOException{
		
		 if(null == forClientId || forClientId.length() == 0){
	            return null;
	     }
		 	
		 UIComponent result = null;
		 UIComponent parent = component;

		  while(parent != null){
			 result = parent.findComponent(forClientId);
			 
			 if(result != null){
				 break;
			 }
			 parent = parent.getParent();
		 }                   

		 if(result == null){
			 result = findComponentBelow(context.getViewRoot(), forClientId);
		 }
	        	
		 if(result == null){
			 if(log.isWarnEnabled()){
				 log.warn(COMPONENT_NOT_FOUND_IN_VIEW_WARN_MESSAGE + ":"+ forClientId);
			 }
		 }
	        
		 return result;
	}
	
	protected UIComponent findComponentBelow(UIComponent startComponent, String forClientId){
		 	
		UIComponent retComp = null;
	
		if(startComponent.getChildCount() == 0){
			return null;
		}
		
		List children = startComponent.getChildren();
	    
	    for(int i = 0, size = children.size(); i < size; i++){
	    	UIComponent comp = (UIComponent) children.get(i);

	    	if(comp instanceof NamingContainer){
	    		retComp = comp.findComponent(forClientId);
	    	}

	    	if(retComp == null){
	    		if(comp.getChildCount() > 0){
	    			retComp = findComponentBelow(comp, forClientId);
	    		}
	    	}

	    	if(retComp != null)
	    		break;
	    }
	    
	    return retComp;
	};
	
	protected boolean isAcceptableMessage(FacesMessage message){
		
		boolean accept = false;
		
		if(acceptLevels.contains(ALL_NAME) || message == null){
			return true;
		}
		
		Severity severity = message.getSeverity();
		
		if(severity == FacesMessage.SEVERITY_ERROR 
				&& acceptLevels.contains(ERROR_NAME)){
			accept = true;
			
		}else if(severity == FacesMessage.SEVERITY_FATAL 
				&& acceptLevels.contains(FATAL_NAME)){
			accept = true;
			
		}else if(severity == FacesMessage.SEVERITY_INFO 
				&& acceptLevels.contains(INFO_NAME)){
			accept = true;
			
		}else if(severity == FacesMessage.SEVERITY_WARN 
				&& acceptLevels.contains(WARN_NAME)){
			accept = true;
		}
		
		return accept;
	}
	
	protected List creatAcceptLevels(String [] levels){

		List acceptLevels = new ArrayList();

		for (int i = 0; i < levels.length; i++) {
			acceptLevels.add(levels[i].toUpperCase());
		}
	
		return acceptLevels;
	}
	
	 
	
	public abstract void renderMarkerHtml(UIComponent component, UIComponent markerFacet, FacesContext context, ResponseWriter writer, 
			  							  String markerClass, String markerStyle) throws IOException;

	public abstract void renderLabelHtml(UIComponent component, FacesContext context, ResponseWriter writer,
										 FacesMessage facesMsg, String labelClass, String labelStyle, String passLabel) throws IOException;
	
	public abstract void renderOuterStyles(UIComponent component, FacesContext context, ResponseWriter writer, String outerStyle, String outerClass) throws IOException;
}
