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();

		}

	}

}