package uk.co.wingpath.modbusgui;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import java.io.*;
import uk.co.wingpath.util.*;
import uk.co.wingpath.gui.*;
import uk.co.wingpath.modbus.*;
import uk.co.wingpath.event.*;
import uk.co.wingpath.event.Event;

public class Command1Panel
    implements CommandPanel
{
    private final Frontend frontend;
    private final Settings settings;
    private final ValueEventSource listeners;
    private final boolean isTester;
    private final boolean isEditor;

    private final StatusBar statusBar;
    private final GridBagPanel panel;
    private final CommandDiscreteTableModel model;
    private final CommandValuePanel valuePanel;
    private final WComponent<Integer> addressField;
    private final WComponent<Integer> countField;
    private final WComponent<Integer> slaveIdField;

    private Command1.Result actualResult;

    public Command1Panel (Frontend frontend, Settings settings,
        final StatusBar statusBar, MirrorField mirror, boolean isTester, boolean isEditor)
    {
        Event.checkIsEventDispatchThread ();
        this.frontend = frontend;
        this.settings = settings;
        this.statusBar = statusBar;
        this.isTester = isTester;
        this.isEditor = isEditor;
        listeners = new ValueEventSource ();
        actualResult = null;

        panel = new GridBagPanel ();
        panel.addTitle (Command1.typeName, 3);

        GridBagPanel leftPanel = new GridBagPanel ();
        GridBagConstraints constraints = panel.createConstraints ();
        constraints.insets = new Insets (2, 0, 2, 5);
        constraints.gridwidth = 2;
        panel.add (leftPanel, constraints);

        int slaveId = settings.getGeneral ().getSlaveId ().getValue ();
        slaveIdField = new WIntegerField (statusBar, "Slave ID",
            0, 255, slaveId);
        slaveIdField.setToolTipText ("Slave identifier");
        slaveIdField.setWidthChars (4);
        slaveIdField.setMnemonic (KeyEvent.VK_I);
        slaveIdField.setMirror (mirror);
        leftPanel.addComponent (slaveIdField);

        addressField = new WIntegerField (statusBar, "Address", 0, 65535, 0);
        addressField.setToolTipText ("Address of first coil");
        addressField.setWidthChars (8);
        addressField.setMnemonic (KeyEvent.VK_A);
        addressField.setMirror (mirror);
        leftPanel.addComponent (addressField);

        countField = new WIntegerField (statusBar, "Count", 0, 65535, 1);
        countField.setToolTipText ("Number of coils");
        countField.setWidthChars (8);
        countField.setMnemonic (KeyEvent.VK_O);
        countField.setMirror (mirror);
        leftPanel.addComponent (countField);

        model = new CommandDiscreteTableModel (
            addressField.getValue (),
            countField.getValue (),
            isTester, isEditor, false);
        valuePanel = new CommandValuePanel ("Received Data", model,
            statusBar, null, 10, isEditor);
        constraints.gridx = 2;
        constraints.gridwidth = 1;
        constraints.insets = new Insets (2, 5, 2, 5);
        panel.add (valuePanel, constraints);

        ValueListener listener = new ValueListener ()
        {
            public void valueChanged (ValueEvent e)
            {
                Event.checkIsEventDispatchThread ();
                listeners.fireValueChanged (e);
            }
        };

        slaveIdField.addValueListener (listener);
        valuePanel.addValueListener (listener);

        addressField.addValueListener (new ValueListener ()
        {
            public void valueChanged (ValueEvent e)
            {
                if (!e.isChanging ())
                    model.setBase (addressField.getValue ());
                listeners.fireValueChanged (e);
            }
        });

        countField.addValueListener (new ValueListener ()
        {
            public void valueChanged (ValueEvent e)
            {
                if (!e.isChanging ())
                    model.setSize (countField.getValue ());
                listeners.fireValueChanged (e);
            }
        });
    }

    public JPanel getPanel ()
    {
        return panel;
    }

    public String getTitle ()
    {
        return Command1.typeName;
    }

    public String getTag ()
    {
        return Command1.tag;
    }

    public String getName ()
    {
        return Command1.typeName;
    }

    public Action getHelpAction ()
    {
        return frontend.getHelpAction ("command_define");
    }

    public void initialize ()
    {
    }

    @Override
    public void setEnabled (boolean enabled, boolean enExpected)
    {
        slaveIdField.setEnabled (enabled);
        countField.setEnabled (enabled);
        addressField.setEnabled (enabled);
        valuePanel.setEnabled (enabled);
        if (!enabled || !enExpected)
            valuePanel.cancelEditing ();
        model.enableExpected (enExpected);
    }

    @Override
    public void highlightErrors (boolean highlight)
    {
        valuePanel.highlightErrors (highlight);
    }

    public boolean checkFields ()
    {
        Event.checkIsEventDispatchThread ();
        if (!slaveIdField.checkValue ())
            return false;
        if (!countField.checkValue ())
            return false;
        if (!addressField.checkValue ())
            return false;
        if (!valuePanel.stopEditing ())
            return false;
        return true;
    }

    public void setSlaveId (int slaveId)
    {
        slaveIdField.setValue (slaveId);
    }

    public void setCommand (Command command)
    {
        if (command == null)
        {
            int slaveId = settings.getGeneral ().getSlaveId ().getValue ();
            slaveIdField.setValue (slaveId);
            addressField.setValue (0);
            countField.setValue (1);
            model.setBase (0);
            model.setSize (1);
            setActualResult (null);
            setExpectedResult (null);
        }
        else
        {
            Command1 cmd = (Command1) command;
            slaveIdField.setValue (cmd.getSlaveId ());
            addressField.setValue (cmd.getAddress ());
            countField.setValue (cmd.getCount ());
            model.setBase (cmd.getAddress ());
            model.setSize (cmd.getCount ());
            setActualResult (cmd.getActualResult ());
            setExpectedResult (cmd.getExpectedResult ());
        }
    }

    public void setActualResult (Command.Result result)
    {
        actualResult = (Command1.Result) result;
        if (result == null)
        {
            model.reset ();
        }
        else
        {
            model.setActualData (actualResult.getActualData ());
            ModbusException exception = actualResult.getException ();
            if (exception != null)
                statusBar.showException (exception);
        }
    }

    private void setExpectedResult (Command1.Result result)
    {
        if (isTester)
        {
            valuePanel.cancelEditing ();
            if (result == null)
            {
                model.resetExpected ();
            }
            else
            {
                model.setExpectedData (result.getExpectedData ());
            }
        }
    }

    @Override
    public void expectActual ()
    {
        if (!isTester)
            return;
        model.setExpectedData (model.getActualData ());
    }

    public Command1 createCommand (String name, String description,
        ModbusException exception)
    {
        Command1 cmd;
        if (isTester)
        {
            cmd = new Command1 (
                name,
                description,
                slaveIdField.getValue (),
                addressField.getValue (),
                countField.getValue (),
                exception,
                model.getExpectedData ());
        }
        else
        {
            cmd = new Command1 (
                name,
                description,
                slaveIdField.getValue (),
                addressField.getValue (),
                countField.getValue ());
        }
        cmd.setActualResult (actualResult);
        return cmd;
    }

    public boolean haveValuesChanged (Command command)
    {
        boolean changed = false;
        Command1 cmd = (Command1) command;
        if (slaveIdField.hasValueChanged (cmd.getSlaveId ()))
            changed = true;
        if (addressField.hasValueChanged (cmd.getAddress ()))
            changed = true;
        if (countField.hasValueChanged (cmd.getCount ()))
            changed = true;
        if (isTester)
        {
            Command1.Result result = cmd.getExpectedResult ();
            if (valuePanel.haveExpectedValuesChanged (
                result.getExpectedData ()))
            {
                changed = true;
            }
        }
        return changed;
    }

    public void addValueListener (ValueListener l)
    {
        listeners.addListener (l);
    }

    public void removeValueListener (ValueListener l)
    {
        listeners.removeListener (l);
    }
}