package ru.indvdum.mywork.vaadin;

 import static ru.indvdum.mywork.MyWork.EM;

 import java.util.Calendar;

 import java.util.List;

 import javax.persistence.Query;

 import ru.indvdum.mywork.openjpa.model.Day;

 import ru.indvdum.mywork.openjpa.model.Task;

 import ru.indvdum.mywork.openjpa.model.Work;

 import com.vaadin.data.Property.ValueChangeEvent;

 import com.vaadin.data.Property.ValueChangeListener;

 import com.vaadin.ui.Alignment;

 import com.vaadin.ui.Button;

 import com.vaadin.ui.ComboBox;

 import com.vaadin.ui.HorizontalLayout;

 import com.vaadin.ui.Label;

 import com.vaadin.ui.RichTextArea;

 import com.vaadin.ui.TextField;

 import com.vaadin.ui.VerticalLayout;

 import com.vaadin.ui.Window;

 import com.vaadin.ui.AbstractSelect.Filtering;

 import com.vaadin.ui.Button.ClickEvent;

 import com.vaadin.ui.Button.ClickListener;

 public class EditWorkDialog extends Window implements ClickListener {

 	private MyWorkApplication myApp = null;

 	private EditState state = null;

 	private Work work = null;

 	private ComboBox workDay = null;

 	private ComboBox workTask = null;

 	private TextField workHours = null;

 	private RichTextArea workResult = null;

 	public EditWorkDialog(MyWorkApplication myApp, EditState state, Work work) throws Exception {

 		super();

 		this.myApp = myApp;

 		this.state = state;

 		switch(state){

 		case CREATE:

 			setCaption("Creating new work");

 			if(work != null)

 				throw new Exception("Illegal argument: work must be null in creating state.");

 			work = new Work();

 			work.setHours(0f);

 			work.setResult("");

 			this.work = work;

 			break;

 		case EDIT:

 			setCaption("Editing work");

 			if(work == null)

 				throw new Exception("Illegal argument: work must be not null in editing state.");

 			this.work = work;

 			break;

 		}

 		init();

 	}

 	private void init(){

 		setModal(true);

 		setWidth("640px");

 		setHeight("480px");

 		VerticalLayout vl = new VerticalLayout();

 		vl.setSizeFull();

 		vl.setSpacing(true);

 		vl.setMargin(true);

 		setContent(vl);

 		HorizontalLayout hlDay = new HorizontalLayout();

 		hlDay.setWidth("100%");

 		Label lblDay = new Label("Day:");

 		lblDay.setWidth("100%");

 		hlDay.addComponent(lblDay);

 		hlDay.setExpandRatio(lblDay, 1f);

 		workDay = new ComboBox();

 		workDay.setWidth("100%");

 		workDay.setImmediate(true);

 		workDay.setFilteringMode(Filtering.FILTERINGMODE_CONTAINS);

 		updateDays("select d from " + Day.class.getName() + " d order by d.day");

 		workDay.addListener(new ValueChangeListener(){

 			@Override

 			public void valueChange(ValueChangeEvent event) {

 				Day day = (Day)event.getProperty().getValue();

 				if(day == null)

 					updateTasks("select t from " + Task.class.getName() + " t order by t.id desc");

 				else

 					updateTasks("select t from " + Task.class.getName() + " t where t.id not in (select w.task.id from " + Work.class.getName() + " w where w.day.id = " + day.getId() + ") order by t.id desc");

 			}

 		});

 		hlDay.addComponent(workDay);

 		hlDay.setExpandRatio(workDay, 5f);

 		vl.addComponent(hlDay);

 		HorizontalLayout hlTask = new HorizontalLayout();

 		hlTask.setWidth("100%");

 		Label lblStart = new Label("Task:");

 		lblStart.setWidth("100%");

 		hlTask.addComponent(lblStart);

 		hlTask.setExpandRatio(lblStart, 1f);

 		workTask = new ComboBox();

 		workTask.setWidth("100%");

 		workTask.setImmediate(true);

 		workTask.setFilteringMode(Filtering.FILTERINGMODE_CONTAINS);

 		Day day = (Day)workDay.getValue();

 		if(day == null)

 			updateTasks("select t from " + Task.class.getName() + " t order by t.id desc");

 		else

 			updateTasks("select t from " + Task.class.getName() + " t where t.id not in (select w.task.id from " + Work.class.getName() + " w where w.day.id = " + day.getId() + ") order by t.id desc");

 		workTask.addListener(new ValueChangeListener(){

 			@Override

 			public void valueChange(ValueChangeEvent event) {

 				Task task = (Task)event.getProperty().getValue();

 				if(task == null)

 					updateDays("select d from " + Day.class.getName() + " d order by d.day");

 				else

 					updateDays("select d from " + Day.class.getName() + " d where d.id not in (select w.day.id from " + Work.class.getName() + " w where w.task.id = " + task.getId() + ") order by d.day");

 			}

 		});

 		hlTask.addComponent(workTask);

 		hlTask.setExpandRatio(workTask, 5f);

 		vl.addComponent(hlTask);

 		HorizontalLayout hlHours = new HorizontalLayout();

 		hlHours.setWidth("100%");

 		Label lblHours = new Label("Hours:");

 		lblHours.setWidth("100%");

 		hlHours.addComponent(lblHours);

 		hlHours.setExpandRatio(lblHours, 1f);

 		workHours = new TextField();

 		workHours.setWidth("100%");

 		workHours.setValue(work.getHours());

 		workHours.setImmediate(true);

 		hlHours.addComponent(workHours);

 		hlHours.setExpandRatio(workHours, 5f);

 		vl.addComponent(hlHours);

 		workResult = new RichTextArea("Result");

 		workResult.setValue(work.getResult());

 		workResult.setSizeFull();

 		vl.addComponent(workResult);

 		vl.setExpandRatio(workResult, 5f);

 		HorizontalLayout hlOk = new HorizontalLayout();

 		hlOk.setWidth("100%");

 		Button okButton = new Button();

 		switch(state){

 		case CREATE:

 			okButton.setCaption("Create");

 			break;

 		case EDIT:

 			okButton.setCaption("Save");

 			break;

 		}

 		okButton.addListener((ClickListener)this);

 		hlOk.addComponent(okButton);

 		hlOk.setComponentAlignment(okButton, Alignment.MIDDLE_RIGHT);

 		vl.addComponent(hlOk);

 	}

 	private void updateDays(String jpql){

 		if(workTask != null && workTask.getValue() != null && workDay != null && workDay.getValue() != null)

 			return;

 		workDay.removeAllItems();

 		Query query = EM.createQuery(jpql);

 		List list = query.getResultList();

 		for(Day day: (List<Day>)list){

 			workDay.addItem(day);

 			Calendar currCal = Calendar.getInstance();

 			currCal.set(Calendar.HOUR_OF_DAY, 0);

 			currCal.set(Calendar.MINUTE, 0);

 			currCal.set(Calendar.SECOND, 0);

 			currCal.set(Calendar.MILLISECOND, 0);

 			if(day.getDay().equals(currCal.getTime()))

 				workDay.select(day);

 		}

 	}

 	private void updateTasks(String jpql){

 		if(workTask != null && workTask.getValue() != null && workDay != null && workDay.getValue() != null)

 			return;

 		workTask.removeAllItems();

 		Query query = EM.createQuery(jpql);

 		List list = query.getResultList();

 		for(Task task: (List<Task>)list)

 			workTask.addItem(task);

 	}

 	@Override

 	public void buttonClick(ClickEvent event) {

 		Object dayObj = workDay.getValue();

 		Object taskObj = workTask.getValue();

 		Object hoursObj = workHours.getValue();

 		String result = workResult.getValue().toString();

 		if (

 				!(dayObj instanceof Day) 

 				|| !(taskObj instanceof Task) 

 				|| !(hoursObj.toString().matches("^[0-9]+[\\.]{0,1}[0-9]*"))

 				) {

 			getWindow().showNotification("Invalid information entered");

 		} else {

 			Day day = (Day)dayObj;

 			Task task = (Task)taskObj;

 			Float hours = Float.parseFloat(hoursObj.toString());

 			work.setDay(day);

 			work.setTask(task);

 			work.setHours(hours);

 			work.setResult(result);

 			try{

 				EM.getTransaction().begin();

 				EM.persist(work);

 				EM.getTransaction().commit();

 				EM.clear();

 			} finally {

 				if(EM.getTransaction().isActive())

 					EM.getTransaction().rollback();

 			}

 			getParent().removeWindow(this);

 			myApp.getWorkTable().requestRepaint();

 		}

 	}

 }