package com.onaro.sanscreen.client.prefs;

import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;

import com.onaro.commons.beans.IPropertyChangeSupport;
import com.onaro.sanscreen.client.ejb.SessionsManager;
import com.onaro.sanscreen.client.ejb.logging.UsageLog;
import com.onaro.sanscreen.client.ejb.logging.UsageLogType;
import com.onaro.sanscreen.client.ejb.logging.UsageLog.MessageBuilder;
import com.onaro.sanscreen.server.interfaces.data.ServerInterfaceException;
import com.onaro.sanscreen.server.sessions.ParamSession;

public class BusinessEntityPreferenceManager implements IPropertyChangeSupport {
        
    /* Preferences that are stored on the server.  These should match what is created in createdb.sql 
     * on the server side since these are persisted on the server
     */
    public static final String SERVER_PREF_TENANT_ENABLED = "TENANT_ENABLED"; //$NON-NLS-1$
    public static final String SERVER_PREF_LOB_ENABLED = "LOB_ENABLED"; //$NON-NLS-1$
    public static final String SERVER_PREF_BU_ENABLED = "BU_ENABLED"; //$NON-NLS-1$
    public static final String SERVER_PREF_PROJECT_ENABLED = "PROJECT_ENABLED"; //$NON-NLS-1$

    /* Use for UsageLog.  Values are resource keys */
    private static final String SERVER_PREF_TENANT_ENABLED_KEY = "be.tenant.enabled"; //$NON-NLS-1$
    private static final String SERVER_PREF_LOB_ENABLED_KEY = "be.lob.enabled"; //$NON-NLS-1$
    private static final String SERVER_PREF_BU_ENABLED_KEY = "be.bu.enabled"; //$NON-NLS-1$
    private static final String SERVER_PREF_PROJECT_ENABLED_KEY = "be.project.enabled"; //$NON-NLS-1$

    // Initialize preference values with their defaults
    private boolean tenantEnabled = false;
    private boolean lobEnabled = true;
    private boolean buEnabled = true;
    private boolean projectEnabled = true;
    
    private PropertyChangeSupport propertyChangeSupport = new PropertyChangeSupport(this);

    private static final BusinessEntityPreferenceManager INSTANCE = new BusinessEntityPreferenceManager();
    
    
    public static BusinessEntityPreferenceManager getInstance() {
        return INSTANCE;
    }
    
    private BusinessEntityPreferenceManager() {
        registerListeners();
        readPreferences();
    }
    
    private void registerListeners() {
//        addPropertyChangeListener(PROP_PROGRESS_DIALOG_ENABLED, new PropertyChangeListener() {
//            // TODO: Determine a non-deprecated substitute for setAutoPopupProgressDialog(). 
//            @SuppressWarnings("deprecation")
//            public void propertyChange(PropertyChangeEvent evt) {
//                com.onaro.client.leekui.ui.compatibility.CompatibilityUtils.setAutoPopupProgressDialog(isProgressDialogEnabled());
//            }
//        });
    }
    
    /**
     * 
     * @return true if the tenant component of a business entity will be in use.
     */
    public boolean isTenantEnabled() {
        return tenantEnabled;
    }
    
    /**
     * Fires property change of {@link BusinessEntityPreferenceManager#SERVER_PREF_TENANT_ENABLED}
     * 
     * @param tenantEnabled flag that indicates if the tenant component of a business entity will be in use.
     */
    void setTenantEnabled(boolean tenantEnabled) {
        boolean oldValue = this.tenantEnabled;
        this.tenantEnabled = tenantEnabled;
        firePropertyChange(SERVER_PREF_TENANT_ENABLED_KEY, oldValue, tenantEnabled);
    }
    
    /**
     * 
     * @return true if the LOB component of a business entity will be in use.
     */
    public boolean isLOBEnabled() {
        return lobEnabled;
    }
    
    /**
     * Fires property change of {@link BusinessEntityPreferenceManager#SERVER_PREF_LOB_ENABLED}
     * 
     * @param lobEnabled flag that indicates if the LOB component of a business entity will be in use.
     */
    void setLOBEnabled(boolean lobEnabled) {
        boolean oldValue = this.lobEnabled;
        this.lobEnabled = lobEnabled;
        firePropertyChange(SERVER_PREF_LOB_ENABLED_KEY, oldValue, lobEnabled);
    }
    
    /**
     * 
     * @return true if the BU component of a business entity will be in use.
     */
    public boolean isBUEnabled() {
        return buEnabled;
    }
    
    /**
     * Fires property change of {@link BusinessEntityPreferenceManager#SERVER_PREF_BU_ENABLED}
     * 
     * @param buEnabled flag that indicates if the BU component of a business entity will be in use.
     */
    void setBUEnabled(boolean buEnabled) {
        boolean oldValue = this.buEnabled;
        this.buEnabled = buEnabled;
        firePropertyChange(SERVER_PREF_BU_ENABLED_KEY, oldValue, buEnabled);
    }
    
    /**
     * 
     * @return true if the project component of a business entity will be in use.
     */
    public boolean isProjectEnabled() {
        return projectEnabled;
    }
    
    /**
     * Fires property change of {@link BusinessEntityPreferenceManager#SERVER_PREF_PROJECT_ENABLED}
     * 
     * @param projectEnabled flag that indicates if the project component of a business entity will be in use.
     */
    void setProjectEnabled(boolean projectEnabled) {
        boolean oldValue = this.projectEnabled;
        this.projectEnabled = projectEnabled;
        firePropertyChange(SERVER_PREF_PROJECT_ENABLED_KEY, oldValue, projectEnabled);
    }
    
    void readPreferences() {
        /* Preferences on server */
        ParamSession paramSession = SessionsManager.getInstance().getSession(ParamSession.class);

        setTenantEnabled(paramSession.get(SERVER_PREF_TENANT_ENABLED, isTenantEnabled()));
        setLOBEnabled(paramSession.get(SERVER_PREF_LOB_ENABLED, isLOBEnabled()));
        setBUEnabled(paramSession.get(SERVER_PREF_BU_ENABLED, isBUEnabled()));
        setProjectEnabled(paramSession.get(SERVER_PREF_PROJECT_ENABLED, isProjectEnabled()));
    }
    
    void writePreferences() {
        try {
            /* Save server preferences */
            ParamSession paramSession = SessionsManager.getInstance().getSession(ParamSession.class);
            
            paramSession.set(SERVER_PREF_TENANT_ENABLED, isTenantEnabled());
            paramSession.set(SERVER_PREF_LOB_ENABLED, isLOBEnabled());
            paramSession.set(SERVER_PREF_BU_ENABLED, isBUEnabled());
            paramSession.set(SERVER_PREF_PROJECT_ENABLED, isProjectEnabled());
            
            if (UsageLog.isEnabled()) {
                MessageBuilder builder = UsageLog.builder(UsageLogType.BUSINESS_ENTITY_PREFERENCES_CHANGE);
                builder.append(SERVER_PREF_TENANT_ENABLED_KEY, isTenantEnabled());
                builder.append(SERVER_PREF_LOB_ENABLED_KEY, isLOBEnabled());
                builder.append(SERVER_PREF_BU_ENABLED_KEY, isBUEnabled());
                builder.append(SERVER_PREF_PROJECT_ENABLED_KEY, isProjectEnabled());
                builder.log();
            }
        }
        catch(ServerInterfaceException pe) 
        {
            //TODO: handle ServerInterfaceException
            pe.printStackTrace();
        }
    }

    private void firePropertyChange(String propertyName, boolean oldValue, boolean newValue) {
        propertyChangeSupport.firePropertyChange(propertyName, oldValue, newValue);
    }
    
    public void addPropertyChangeListener(PropertyChangeListener listener) {
        propertyChangeSupport.addPropertyChangeListener(listener);
    }

    public void addPropertyChangeListener(String propertyName, PropertyChangeListener listener) {
        propertyChangeSupport.addPropertyChangeListener(propertyName, listener);
    }

    public void removePropertyChangeListener(PropertyChangeListener listener) {
        propertyChangeSupport.removePropertyChangeListener(listener);
    }

    public void removePropertyChangeListener(String propertyName, PropertyChangeListener listener) {
        propertyChangeSupport.removePropertyChangeListener(propertyName, listener);
    }

}