package tmcsim.cadsimulator.viewer;

import tmcsim.highwaymodel.TrafficEvent;
import java.util.LinkedList;
import java.util.List;
import java.util.Observable;
import java.util.Observer;
import java.util.Vector;
import javax.swing.AbstractListModel;
import javax.swing.JOptionPane;
import tmcsim.cadsimulator.managers.TrafficModelManager;

/**
 * Viewer for the Traffic Model that displays the event queue and the incident
 * list.
 *
 * @author jdalbey
 */
public class TrafficModelViewPanel extends javax.swing.JPanel implements Observer
{

    /**
     * Reference to the driver associated with this GUI
     */
    private TrafficModelManager driver;
    private List<String> incidents;

    /**
     * Creates new form TrafficModelViewPanel
     */
    public TrafficModelViewPanel()
    {
        initComponents();
        lstEvents.setSelectedIndex(0);

    }

    @Override
    /**
     * Refresh the display.
     */
    public void update(Observable obs, Object obj)
    {
        if (obs == null)
        {
            return;
        }
        if (obs instanceof TrafficModelManager)
        {
            // save reference to the model for use by button handlers
            driver = (TrafficModelManager) obs;
        }
        if (obj == null)
        {
            return;
        }
        // Determine what needs updating; time, events, or incidents
        if (obj instanceof String)
        {
            String currentTime = (String) obj;
            txtClockTime.setText(currentTime);
        }
        if (obj instanceof Vector)
        {
            lstIncidents.setListData((Vector) obj);
        }
        if (obj instanceof LinkedList)
        {
            lstEvents.setModel(new MyListModel((LinkedList) obj));
        }
        if (obj instanceof Integer)
        {
            // The manager processed an event so advance the selected item
            int currIdx = lstEvents.getSelectedIndex();
            lstEvents.setSelectedIndex(currIdx+1);
            lstEvents.ensureIndexIsVisible(lstEvents.getSelectedIndex());
        }
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents()
    {

        pnlEvents = new javax.swing.JPanel();
        scrollEvents = new javax.swing.JScrollPane();
        lstEvents = new javax.swing.JList<>();
        txtClockTime = new javax.swing.JLabel();
        btnReload = new javax.swing.JButton();
        pnlIncidents = new javax.swing.JPanel();
        jScrollPane1 = new javax.swing.JScrollPane();
        lstIncidents = new javax.swing.JList<>();
        btnClear = new javax.swing.JButton();

        lstEvents.setFont(new java.awt.Font("Courier New", 0, 12)); // NOI18N
        lstEvents.setModel(new javax.swing.AbstractListModel<String>()
        {
            String[] strings = { "item 1", "item 2" };
            public int getSize() { return strings.length; }
            public String getElementAt(int i) { return strings[i]; }
        });
        scrollEvents.setViewportView(lstEvents);

        txtClockTime.setFont(new java.awt.Font("Noto Sans", 1, 14)); // NOI18N
        txtClockTime.setText("0:00:00");

        btnReload.setText("Reload");
        btnReload.addActionListener(new java.awt.event.ActionListener()
        {
            public void actionPerformed(java.awt.event.ActionEvent evt)
            {
                btnReloadActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout pnlEventsLayout = new javax.swing.GroupLayout(pnlEvents);
        pnlEvents.setLayout(pnlEventsLayout);
        pnlEventsLayout.setHorizontalGroup(
            pnlEventsLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(pnlEventsLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(scrollEvents, javax.swing.GroupLayout.PREFERRED_SIZE, 430, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(20, Short.MAX_VALUE))
            .addGroup(pnlEventsLayout.createSequentialGroup()
                .addGap(112, 112, 112)
                .addComponent(txtClockTime, javax.swing.GroupLayout.PREFERRED_SIZE, 225, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addComponent(btnReload)
                .addGap(32, 32, 32))
        );
        pnlEventsLayout.setVerticalGroup(
            pnlEventsLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, pnlEventsLayout.createSequentialGroup()
                .addGroup(pnlEventsLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(txtClockTime, javax.swing.GroupLayout.PREFERRED_SIZE, 28, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(btnReload))
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(scrollEvents, javax.swing.GroupLayout.DEFAULT_SIZE, 172, Short.MAX_VALUE)
                .addContainerGap())
        );

        lstIncidents.setFont(new java.awt.Font("Courier New", 0, 15)); // NOI18N
        lstIncidents.setModel(new javax.swing.AbstractListModel<String>()
        {
            String[] strings = { "Item 1", "Item 2", "Item 3", "Item 4", "Item 5" };
            public int getSize() { return strings.length; }
            public String getElementAt(int i) { return strings[i]; }
        });
        lstIncidents.setSelectionMode(javax.swing.ListSelectionModel.SINGLE_SELECTION);
        jScrollPane1.setViewportView(lstIncidents);

        btnClear.setText("Clear Incident");
        btnClear.addActionListener(new java.awt.event.ActionListener()
        {
            public void actionPerformed(java.awt.event.ActionEvent evt)
            {
                btnClearActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout pnlIncidentsLayout = new javax.swing.GroupLayout(pnlIncidents);
        pnlIncidents.setLayout(pnlIncidentsLayout);
        pnlIncidentsLayout.setHorizontalGroup(
            pnlIncidentsLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(pnlIncidentsLayout.createSequentialGroup()
                .addGroup(pnlIncidentsLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(btnClear)
                    .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 211, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addGap(0, 0, Short.MAX_VALUE))
        );
        pnlIncidentsLayout.setVerticalGroup(
            pnlIncidentsLayout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, pnlIncidentsLayout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 179, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(btnClear)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(this);
        this.setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addGroup(layout.createSequentialGroup()
                        .addGap(12, 12, 12)
                        .addComponent(pnlIncidents, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                    .addComponent(pnlEvents, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addComponent(pnlEvents, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(pnlIncidents, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                .addContainerGap())
        );
    }// </editor-fold>//GEN-END:initComponents

    private void btnReloadActionPerformed(java.awt.event.ActionEvent evt)//GEN-FIRST:event_btnReloadActionPerformed
    {//GEN-HEADEREND:event_btnReloadActionPerformed
        String message = "Reload will delete all events in the queue and reload the events file.\n"
                + "This will not effect the simulation manager, and will run all events up to\n"
                + "current simulation time.";
        String title = "Please Confirm";
        // display a confirmation message for the user
        int reply = JOptionPane.showConfirmDialog(this, message, title, JOptionPane.YES_NO_OPTION);
        if (reply == JOptionPane.YES_OPTION)
        {
            if (driver != null)
            {
                driver.loadEvents();
            }
        }
    }//GEN-LAST:event_btnReloadActionPerformed

    private void btnClearActionPerformed(java.awt.event.ActionEvent evt)//GEN-FIRST:event_btnClearActionPerformed
    {//GEN-HEADEREND:event_btnClearActionPerformed
        String selectedItem = lstIncidents.getSelectedValue();
        if (selectedItem == null)
        {
            JOptionPane.showMessageDialog(this, "No Incident Selected", "Warning", JOptionPane.INFORMATION_MESSAGE);
        } else
        {
            System.out.println("Clicked Incident:" + selectedItem);
            if (driver != null)
            {
                driver.clearIncident(selectedItem);
            }
            lstIncidents.clearSelection();
        }
    }//GEN-LAST:event_btnClearActionPerformed

    class MyListModel extends AbstractListModel<String>
    {

        TrafficEvent[] strings;// = { "item 1", "item 2" };

        public MyListModel(List<TrafficEvent> events)
        {
            strings = events.toArray(new TrafficEvent[events.size()]);
        }

        public int getSize()
        {
            return strings.length;
        }

        public String getElementAt(int i)
        {
            return strings[i].rawString;
        }
    }


    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton btnClear;
    private javax.swing.JButton btnReload;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JList<String> lstEvents;
    private javax.swing.JList<String> lstIncidents;
    private javax.swing.JPanel pnlEvents;
    private javax.swing.JPanel pnlIncidents;
    private javax.swing.JScrollPane scrollEvents;
    private javax.swing.JLabel txtClockTime;
    // End of variables declaration//GEN-END:variables
}