package org.kuali.student.common.ui.client.widgets.rules;

 import java.util.HashMap;

 import java.util.Map;

 import org.kuali.student.common.ui.client.mvc.Callback;

 import org.kuali.student.common.ui.client.widgets.tabs.KSTabPanel;

 import org.kuali.student.core.statement.dto.ReqComponentInfo;

 import org.kuali.student.core.statement.dto.StatementTreeViewInfo;

 import com.google.gwt.user.client.ui.FlowPanel;

 import com.google.gwt.user.client.ui.Widget;

 public class RuleManageWidget extends FlowPanel {

     private RuleTableManipulationWidget editObject = new RuleTableManipulationWidget();

     private RuleExpressionEditor editLogic = new RuleExpressionEditor(this);

     private SubrulePreviewWidget preview = new SubrulePreviewWidget(null, true, null);

     private KSTabPanel panel = new KSTabPanel(KSTabPanel.TabPanelStyle.SMALL);

     //widget's data

     private StatementTreeViewInfo rule = null;

     private static final String objectView = "Edit with Object";

     private static final String logicView = "Edit with Logic";

     private static final String previewView = "Preview";

     //TODO use application context for all labels

     public RuleManageWidget() {

         super();

         Map<String, Widget> tabLayoutMap = new HashMap<String, Widget>();

         tabLayoutMap.put(objectView, editObject);

         panel.addTab(objectView, objectView, editObject);

         panel.addTabCustomCallback(objectView, new Callback<String>() {

             @Override

             public void exec(String result) {

                 //updateObjectView(false, null);

                 editObject.redraw();

             }

         });

         tabLayoutMap.put(logicView, editLogic);

         panel.addTab(logicView, logicView, editLogic);

         panel.addTabCustomCallback(logicView, new Callback<String>() {

             @Override

             public void exec(String result) {

                 updateLogicView();

             }

         });

         tabLayoutMap.put(previewView, preview);

         panel.addTab(previewView, previewView, preview);

         panel.addTabCustomCallback(previewView, new Callback<String>() {

             @Override

             public void exec(String result) {

                 updatePreview();

             }

         });

         panel.selectTab(objectView);

         add(panel);

     }

     public void redraw(StatementTreeViewInfo rule, Boolean ruleChanged) {

         this.rule = rule;

         updateObjectView(ruleChanged);    //update object view first as other views depend on it

         updateLogicView();

         //if we are coming from summary view then make sure object view is the default view

         if (!ruleChanged) {

             panel.selectTab(objectView);        

         }

     }

     private void updateObjectView(Boolean ruleChanged) {

         if (rule != null) {

             editObject.redraw(rule, true, ruleChanged);

         }

     }

     private void updateLogicView() {

         if (rule != null) {

             editLogic.setRule(editObject.getRule());

         }

     }

     private void updatePreview() {

         preview.showSubrule(getStatementTreeViewInfo());

     }

     //called when user clicks 'update' or 'undo' on rule in rule expression editor

     protected void updateObjectRule(RuleInfo rule) {

         //this.rule = rule.getStatementVO().getStatementTreeViewInfo();

         editObject.setRule(rule);

     }

     public void setReqCompEditButtonClickCallback(Callback<ReqComponentInfo> callback) {

         editObject.addReqCompEditButtonClickCallback(callback);

         editLogic.addReqCompEditButtonClickCallback(callback);

     }

     public void setRuleChangedButtonClickCallback(Callback<Boolean> callback) {

         editObject.addRuleChangedButtonClickCallback(callback);

         editLogic.addRuleChangedButtonClickCallback(callback);

     }

     public StatementTreeViewInfo getStatementTreeViewInfo() {

         return editObject.getRule().getStatementVO().getStatementTreeViewInfo();

     }

     public void setEnabled(boolean enabled) {

         editObject.setEnabledView(enabled);

         editLogic.setEnabledView(enabled);

     }

 }