package com.infragistics.jsf.v81.webgrid.functionality;

import java.util.Date;
import java.util.List;

import javax.faces.component.UICommand;
import javax.faces.context.FacesContext;
import javax.faces.event.ActionEvent;

import com.infragistics.data.ColumnMetaData;
import com.infragistics.data.DAO;
import com.infragistics.data.DataSource;
import com.infragistics.data.Person;
import com.infragistics.faces.grid.component.Column;
import com.infragistics.faces.grid.component.GridView;
import com.infragistics.faces.shared.BaseWebGridPage;

public class DynamicChangingBean extends BaseGridPage {

	private final static short ADD_DATA_SOURCE = 1;
	private final static short REMOVE_DATA_SOURCE = 2;
	private final static short CHANGE_DATA_SOURCE = 3;

	private static int addingId = 8000;
	private static int changedCount = 0;
	private static int removedCount = 0;

	private short actionType = 0;
	private DataSource dataSource;
	private UICommand addButton = null;
	private UICommand removeButton = null;
	private UICommand changeButton = null;

	public void onDataSourceChange(ActionEvent event) {
		String value = (String) ((UICommand) event.getSource()).getValue();
		if ("Add Data".equals(value)) {
			actionType = ADD_DATA_SOURCE;
		} else if ("Remove Data".equals(value)) {
			actionType = REMOVE_DATA_SOURCE;
		} else if ("Change Data".equals(value)) {
			actionType = CHANGE_DATA_SOURCE;
		}
		// initGrid();
	}

	public void setGrid(GridView grid) {
		this.grid = grid;
		// if the grid is empty, it probably means that it hasn't been
		// initialized yet
		if (grid.getChildren().isEmpty()) {
			initGrid();
		}
	}

	private DataSource getDataSource() {
		if (dataSource == null) {
			dataSource = DAO.getDataSourceEmployees();
		}

		switch (actionType) {
		case 1: {
			addToDataSource(dataSource);
			break;
		}
		case 2: {
			removeFromDataSource(dataSource);
			break;
		}
		case 3: {
			changeDataSource(dataSource);
			break;
		}
		
		}
		actionType = 0; 
		return dataSource;
	}

	private void addToDataSource(DataSource dSource) {
		Person employee = new Person(addingId, "Added" + addingId, "Added"
				+ addingId, "Added" + addingId, "Added" + addingId, "Added"
				+ addingId, "Added" + addingId, new Date(), true, addingId);
		addingId++;
		((List) dSource.getRows()).add(employee);
	}

	private void removeFromDataSource(DataSource dSource) {
		((List) dSource.getRows()).remove(0);
		removedCount++;
	}

	private void changeDataSource(DataSource dSource) {
		changedCount++;
		Person employee = (Person) ((List) dSource.getRows()).get(0);
		employee.setAge(changedCount);
		employee.setCity("Changed" + changedCount);
		employee.setCountry("Changed" + changedCount);
		employee.setEmail("Changed" + changedCount);
	}

	public Object getRows() {
		return getDataSource().getRows();
	}

	/**
	 * Clear a grid to rebind it later-on
	 * 
	 */
	private void clearGrid() {
		// clear the grid
		grid.setFooter(null);
		grid.setHeader(null);
		grid.getChildren().clear();
		grid.getTemplateItems().clear();
		grid.setColumnPositions(null);
	}

	private void initGrid() {
		// Thread.dumpStack();
		FacesContext context = FacesContext.getCurrentInstance();

		// clear the grid
		clearGrid();
		grid.setAllowFixedColumns(true); 
		grid.setFixedColumnCount(2);
		// loop through the meta-data defining the columns in the dataModel
		// and create a column in the grid for basic data type

		dataSource = getDataSource();
		if (dataSource != null) {
			ColumnMetaData[] columns = dataSource.getColumMetaData();
			for (int i = 0; i < columns.length; i++) {
				ColumnMetaData columnMetaData = columns[i];
				if (columnMetaData != null) {
					if (columnMetaData.getDatatype() != List.class) {
						// create a column
						Column columnName = createColumn(context,
								columnMetaData.getDisplayName(), "#{DATA_ROW."
										+ columnMetaData.getName() + "}",
								columnMetaData.getName());
						grid.getTemplateItems().add(columnName);
					}
				}
			}
		}

		// ask the grid to rebind itself to its datasource

		// grid.dataBind();
	}

	public UICommand getAddButton() {
		return addButton;
	}

	public void setAddButton(UICommand addButton) {
		this.addButton = addButton;
	}

	public UICommand getRemoveButton() {
		return removeButton;
	}

	public void setRemoveButton(UICommand removeButton) {
		this.removeButton = removeButton;
	}

	public UICommand getChangeButton() {
		return changeButton;
	}

	public void setChangeButton(UICommand changeButton) {
		this.changeButton = changeButton;
	}

}