package org.honours.greenstone;

import java.util.List;

import org.apache.log4j.Logger;
import org.expeditee.items.Item;
import org.expeditee.items.Picture;
import org.expeditee.items.Text;
import org.honours.collection.CollectionItem;
import org.honours.collection.NoteLayer;

public class CollectionContentEditor {

	static Logger logger = Logger.getLogger(org.honours.greenstone.CollectionContentEditor.class.getName());
	
	private CollectionItem _collectionItem;
	private ArchiveFileEditor _archiveFileEditor;
	//private HtmlForDocXML _htmlForDocXML;
	
	public CollectionContentEditor(CollectionItem currCI, String _collectionPath) {
		_collectionItem = currCI;
		_archiveFileEditor = new ArchiveFileEditor(_collectionItem.getDocXML());
	}

	public void editCollectionItems() {
		
		List<Item> items = _collectionItem.getFrame().getItems();
		boolean noChange = true;
		ArchiveFileReader afr = new ArchiveFileReader(_collectionItem.getDocXML());
		
		for(Item item : items){
			
			if(item instanceof Text){
				if(item.isAnnotation()){
					//TODO: Deal with annotation items correctly.
					
				}else{
					
					Text text = (Text)item;

					if(text.getData() != null)
					if(text.getData().size() > 0){
						String elemText = afr.obtainElementText(text.getData().get(0));
					
						if(!elemText.equals(null)){
							if(elemText.equals(text.getText()))
								continue;
							else
								noChange = false;
						}
					}
					
					if(!noChange)
						_archiveFileEditor.editArchiveDocFile(text);

				}
			}else if(item instanceof Picture){
				//TODO: Deal with picture items correctly.
			}
		}
		
		noChange = writeFrameID(afr,noChange);
		noChange = addNotes();
		//addNotes();
		
		if(!noChange)
			_archiveFileEditor.write();
	}

	/**
	 * Method for adding/editing the framID metadata value
	 * @param afr
	 * @param noChange
	 */
	private boolean writeFrameID(ArchiveFileReader afr, boolean noChange){
		
		//Write code to write frame number.
		String frameID = afr.obtainElementText("frameID");
		String currentFrameID = Integer.toString(_collectionItem.getFrame().getNumber());
		Text frameIDtext = null;
				
		if(frameID == null){
			//create a new frameID element
			frameIDtext = new Text(currentFrameID);
			frameIDtext.setData("frameID");
					
		}else{
			//check if frameID is the same as the current frame name/number.
			if(!frameID.equals(currentFrameID)){
			
				frameIDtext = new Text(currentFrameID);
				frameIDtext.setData("frameID");
					
			}
					
		}
				
		if(frameIDtext != null){
			System.err.println("Setting frame metadata... " + frameIDtext.getText());
			_archiveFileEditor.editArchiveDocFile(frameIDtext);
			noChange = false;
		}
		
		return noChange;
	}

	/**
	 * Method to output any notes associated with an item to the
	 * doc.xml file.
	 */
	private boolean addNotes() {
		//Add notes to docXML file.
		NoteLayer noteLayer = _collectionItem.getNoteLayer();
		
		if(noteLayer != null){
			StringBuffer notesStringBuffer = new StringBuffer("");
			
			notesStringBuffer.append("<table attr=\"norect\" cellpadding=\"0\" width=\"100%\">");
			notesStringBuffer.append("<tbody attr=\"norect\">");

			for(Text t : noteLayer.getFrame().getTextItems()){
				notesStringBuffer.append("<tr attr=\"norect\">");
				notesStringBuffer.append("<td attr=\"norect\">");
				
				notesStringBuffer.append(t.getText() + "<br/>");
				
				notesStringBuffer.append("</td>");
				notesStringBuffer.append("</tr>");
			}
			
			notesStringBuffer.append("</tbody>");
			notesStringBuffer.append("</table>");
			
			if(!notesStringBuffer.toString().equals(""))
			{
				//Write a "Notes" metadata element to the doc.xml file.
				Text notesText = new Text(notesStringBuffer.toString());
				notesText.setData("Notes");
				_archiveFileEditor.editArchiveDocFile(notesText);
			}
			
			System.err.println("Writing out notes...");
			return false;		//false equates to a change.
		}
		
		return true;	//true equates to "no change"
	}

}