/*******************************************************************************
 * Copyright (c) 2011, 2012 Formal Mind GmbH and University of Dusseldorf.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     Michael Jastram - initial API and implementation
 ******************************************************************************/
package org.eclipse.rmf.reqif10.pror.editor.agilegrid;

import java.util.HashMap;

import org.agilemore.agilegrid.AgileGrid;
import org.agilemore.agilegrid.DefaultLayoutAdvisor;
import org.agilemore.agilegrid.ICellRenderer;
import org.eclipse.rmf.reqif10.SpecHierarchy;
import org.eclipse.rmf.reqif10.Specification;

public class ProrLayoutAdvisor extends DefaultLayoutAdvisor {

	private final HashMap<Integer, String> topHeaderLabel = new HashMap<Integer, String>();
	private int columnCount;
	private int rowCount;

	private final HashMap<Integer, HashMap<Integer, Integer>> cachedCellHeights = new HashMap<Integer, HashMap<Integer, Integer>>();

	public ProrLayoutAdvisor(AgileGrid agileGrid) {
		super(agileGrid);

	}

	@Override
	public String getTopHeaderLabel(int col) {
		String label;
		if (col == columnCount - 1) {
			label = "Link";
		} else {
			label = topHeaderLabel.get(col);
		}
		return label != null ? label : ("Column " + (col + 1));
	}

	@Override
	protected void doSetTopHeaderLabel(int col, String label) {
		topHeaderLabel.put(col, label);
	}

	@Override
	protected void doSetColumnCount(int columnCount) {
		this.columnCount = columnCount;
	}

	@Override
	public int getColumnCount() {
		return columnCount;
	}

	@Override
	protected void doSetRowCount(int rowCount) {
		this.rowCount = rowCount;
	}

	@Override
	public int getRowCount() {
		return rowCount;
	}

	/**
	 * Used by some {@link ICellRenderer}s to store the cell's height. The
	 * method checks whether the row height has changed and notifies the
	 * associated {@link ProrAgileGrid}.
	 */
	void setCellHeight(int row, int col, int height) {
		int oldRowHeight = getRowHeight(row);
		HashMap<Integer, Integer> cols = cachedCellHeights.get(row);
		if (cols == null) {
			cols = new HashMap<Integer, Integer>();
			cachedCellHeights.put(row, cols);
		}
		cols.put(col, height);

		int newRowHeight = getRowHeight(row);
		if (oldRowHeight != newRowHeight) {
			super.setRowHeight(row, newRowHeight);
			agileGrid.redraw();
		}
	}
	

	@Override
	public int getRowHeight(int row) {
		ProrRow prorRow = ((ProrAgileGridContentProvider) agileGrid
				.getContentProvider()).getProrRow(row);
		if (prorRow != null && ! prorRow.isVisible()) return 1;

		int height = 18;
		if (cachedCellHeights.get(row) == null) {
			return height;
		}
		HashMap<Integer, Integer> cols = cachedCellHeights.get(row);
		if (cols == null) {
			return height;
		}
		for (Integer h : cols.values()) {
			if (h > height) {
				height = h;
			}
		}
		return height;
	}

	@Override
	public String getLeftHeaderLabel(int row) {
		StringBuffer sb = new StringBuffer();
		
		ProrRow prorRow = ((ProrAgileGridContentProvider) agileGrid
				.getContentProvider()).getProrRow(row);
		if (!(prorRow instanceof ProrRow.ProrRowSpecHierarchy)) {
			return "";			
		}
		SpecHierarchy specHierarchy = ((ProrRow.ProrRowSpecHierarchy) prorRow).getSpecHierarchy();

		while (specHierarchy.eContainer() instanceof SpecHierarchy) {
			SpecHierarchy parent = (SpecHierarchy) specHierarchy.eContainer();
			int level = parent.getChildren().indexOf(specHierarchy) + 1;
			sb.insert(0, level);
			sb.insert(0, ".");
			specHierarchy = parent;
		}
		if (specHierarchy.eContainer() instanceof Specification) {
			Specification parent = (Specification) specHierarchy
					.eContainer();
			int level = parent.getChildren().indexOf(specHierarchy) + 1;
			sb.insert(0, level);
		}
		return sb.toString();
	}

}