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package cn.mapway.document.ui.client.main;

import com.google.gwt.core.client.GWT;
import com.google.gwt.event.logical.shared.HasSelectionHandlers;
import com.google.gwt.event.logical.shared.SelectionEvent;
import com.google.gwt.event.logical.shared.SelectionHandler;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.client.ui.*;
import cn.mapway.document.ui.client.module.GenInfo;
import cn.mapway.document.ui.client.module.ObjectInfo;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * The type Output parameter.
 */
public class OutputParameter extends Composite implements
HasSelectionHandlers  {

	private static OutputParameterUiBinder uiBinder = GWT
			.create(OutputParameterUiBinder.class);

    /**
     * The interface Output parameter ui binder.
     */
    interface OutputParameterUiBinder extends UiBinder {
	}

    /**
     * Instantiates a new Output parameter.
     */
    public OutputParameter() {
		initWidget(uiBinder.createAndBindUi(this));
		tbl.addSelectionHandler(fieldTypeSelectionHandler);
	}

    /**
     * The Lb type.
     */
    @UiField
	Label lbType;
    /**
     * The Lb summary.
     */
    @UiField
	Label lbSummary;

    /**
     * The Tbl.
     */
    @UiField
	ObjectInfoPanel tbl;

    /**
     * The Json panel.
     */
    @UiField
	JsonPanel jsonPanel;

    /**
     * The Obj info panel.
     */
    @UiField
	HTMLPanel objInfoPanel;

    /**
     * Parse.
     *
     * @param output the output
     */
    public void parse(ObjectInfo output) {
		gens =new ArrayList();
		mapper=new HashMap();
		lbType.setText(output.type());
		lbSummary.setText(output.summary());
		
		if(tbl.isPrimitive(output.type()))
		{
			lbSummary.setVisible(true);
			tbl.setVisible(false);
			//原始數據類型
			objInfoPanel.setVisible(false);
			jsonPanel.setString(output.example());
		}
		else
		{
			//複雜類型
			tbl.setVisible(true);
			tbl.parse(output, gens, mapper);
			lbSummary.setVisible(false);
			
			objInfoPanel.clear();
			while (needContinue(gens)) {
				List gens2 = new ArrayList();
				for (GenInfo info : gens) {
					if (info.gen == false) {

						ObjectInfoPanel p = new ObjectInfoPanel();
						p.addSelectionHandler(fieldTypeSelectionHandler);
						p.parse(info.obj, gens2, mapper);
						objInfoPanel.add(p);
						info.gen = true;
						
						Anchor a = new Anchor();
						a.setName(info.type);
						mapper.put(info.type, a);
						objInfoPanel.add(a);
					}
				}
				merge(gens, gens2);
			}

			jsonPanel.setJson(output.json());
		}
	}
	/**
	 * Merge.
	 *
	 * @param gens the gens
	 * @param gens2 the gens 2
	 */
	private void merge(List gens, List gens2) {
		for (GenInfo info : gens2) {
			boolean find = false;
			for (GenInfo gen : gens) {
				if (gen.type.equals(info.type)) {
					find = true;
					break;
				}
			}

			if (find == false) {
				gens.add(info);
			}
		}
	}

	/**
	 * Need continue.
	 *
	 * @param gens2 the gens 2
	 * @return true, if successful
	 */
	private boolean needContinue(List gens2) {
		for (GenInfo info : gens2) {
			if (info.gen == false) {
				return true;
			}
		}
		return false;
	}
	
	/** The field type selection handler. */
	private SelectionHandler fieldTypeSelectionHandler = new SelectionHandler() {

		@Override
		public void onSelection(SelectionEvent arg0) {
			if (mapper != null) {
				ObjectInfo info = arg0.getSelectedItem();
				Anchor a = mapper.get(info.type());
				if (a != null) {
					a.getElement().scrollIntoView();
				}
			}
		}
	};

    /**
     * The mapper.
     */
    Map mapper;

    /**
     * The gens.
     */
    List gens;

	/* (non-Javadoc)
	 * @see com.google.gwt.event.logical.shared.HasSelectionHandlers#addSelectionHandler(com.google.gwt.event.logical.shared.SelectionHandler)
	 */
	@Override
	public HandlerRegistration addSelectionHandler(
			SelectionHandler arg0) {
		return addHandler(arg0, SelectionEvent.getType());
	}

	
	

}