package com.onaro.sanscreen.client.view.tabular;

import java.awt.Component;
import java.text.MessageFormat;
import java.util.Date;
import java.util.ResourceBundle;

import javax.swing.JTable;
import javax.swing.table.DefaultTableCellRenderer;

import org.apache.commons.lang3.StringUtils;

import com.onaro.sanscreen.client.view.init.ConfigurableTableModelInitInfo;
import com.onaro.sanscreen.util.Constant;
import com.onaro.util.jfc.tables.filter.StringFilter;
import com.onaro.util.jfc.tables.renderers.SimpleTableCellRenderer;

/**
 * A column that displays dates given as the number of milliseconds since the epoch (given as <code>long</code>).
 * Enumeration support is based on the number of milliseconds and not on the date (because the date is locale depenant).
 */
public class DateColumn extends BasicCachingColumn {

	private static final long serialVersionUID = 1L;
    /**
	 * Formats the dates.
	 */
	MessageFormat formatter;

	/**
	 * Configure a date column. <p/> It gets from the configuration the followig paramters:
	 * <ul>
	 * <li>format - The name of the format in the resource file. Optional, the default is "dateFormat".
	 * </ul>
	 * 
	 * @param tableName
	 *            the name of the table this column belongs to
	 * @param resources
	 *            a locale dependant resource bundle from which the column reads its strings and icons using the table
	 *            name and column name as the resource's name
	 * @param enumerations
	 *            used for translation of enumerated valued
	 * 
	 */
	public DateColumn(String tableName, ConfigurableTableModelInitInfo.DateColumnInitInfo columnInitInfo,
			ResourceBundle resources, com.onaro.util.enumeration.EnumPresentation enumerations) {
		super(tableName, columnInitInfo, resources, enumerations);

		String formatKey = columnInitInfo.getFormat();
		String format = resources.getString(formatKey);
		formatter = new MessageFormat(format);

		initialize();
	}

	private void initialize() {
		// no enum should be defined for dates.
		setFilter(new StringFilter());
	}

	@Override
	protected DefaultTableCellRenderer createCellRenderer() {
		return new DateTableCellRenderer();
	}

	@Override
	protected Object createValue(Row row) {

		Object value = null;

		String valueStr = (String) row.getTabularDataModelValue(getTabularDataModelColumnName());

		if (StringUtils.isNotBlank(valueStr)) {
			try {

				value = new Date(Long.parseLong(valueStr));

			} catch (Exception e) {
				// ignore
			}
		}

		if (value == null) {
			value = super.createValue(row);
		}

		return value;
	}

	class DateTableCellRenderer extends SimpleTableCellRenderer {

		private static final long serialVersionUID = 1L;

		private final Date date;

		private final Date[] dateArgs;

		public DateTableCellRenderer() {
			date = new Date();
			dateArgs = new Date[] { date, date };
		}

		@Override
		public Component getTableCellRendererComponent(JTable table, final Object value, boolean isSelected,
				boolean hasFocus, int row, int column) {

			Object formattedValue = value;
			;

			if (value instanceof Date) {
				Date dateValue = (Date) value;
				if (dateValue.getTime() != Constant.END_DATE) {
					date.setTime(dateValue.getTime());
					formattedValue = formatter.format(dateArgs);
				} else {
					formattedValue = StringUtils.EMPTY;
				}
			}

			return super.getTableCellRendererComponent(table, formattedValue, isSelected, hasFocus, row, column);
		}

	}

	@Override
	protected String getCacheKey() {
		return getTabularDataModelColumnName();
	}
}