package org.kuali.student.core.comments.ui.client.widgets.commenttool;

 import java.text.DateFormat;

 import java.text.SimpleDateFormat;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.Date;

 import java.util.List;

 import java.util.Map;

 import org.kuali.student.common.dto.RichTextInfo;

 import org.kuali.student.common.dto.StatusInfo;

 import org.kuali.student.common.dto.DtoConstants.DtoState;

 import org.kuali.student.common.ui.client.application.Application;

 import org.kuali.student.common.ui.client.application.KSAsyncCallback;

 import org.kuali.student.common.ui.client.configurable.mvc.HasReferenceId;

 import org.kuali.student.common.ui.client.configurable.mvc.SectionTitle;

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

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

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

 import org.kuali.student.common.ui.client.mvc.dto.ReferenceModel;

 import org.kuali.student.common.ui.client.widgets.KSButton;

 import org.kuali.student.common.ui.client.widgets.KSLabel;

 import org.kuali.student.common.ui.client.widgets.KSLightBox;

 import org.kuali.student.common.ui.client.widgets.KSTextArea;

 import org.kuali.student.common.ui.client.widgets.KSButtonAbstract.ButtonStyle;

 import org.kuali.student.common.ui.client.widgets.buttongroups.OkGroup;

 import org.kuali.student.common.ui.client.widgets.buttongroups.ButtonEnumerations.OkEnum;

 import org.kuali.student.common.ui.client.widgets.dialog.ConfirmationDialog;

 import org.kuali.student.common.ui.client.widgets.layout.VerticalFlowPanel;

 import org.kuali.student.core.comment.dto.CommentInfo;

 import org.kuali.student.core.comments.ui.client.service.CommentRpcService;

 import org.kuali.student.core.comments.ui.client.service.CommentRpcServiceAsync;

 import com.google.gwt.core.client.GWT;

 import com.google.gwt.dom.client.Style;

 import com.google.gwt.event.dom.client.ClickEvent;

 import com.google.gwt.event.dom.client.ClickHandler;

 import com.google.gwt.event.dom.client.KeyUpEvent;

 import com.google.gwt.event.dom.client.KeyUpHandler;

 import com.google.gwt.user.client.Window;

 import com.google.gwt.user.client.rpc.AsyncCallback;

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

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

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

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

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

 public class CommentTool implements HasReferenceId {

     private CommentRpcServiceAsync commentServiceAsync = GWT.create(CommentRpcService.class);

     private String referenceId;

     private String referenceTypeKey;

     private String referenceType;

     private String referenceState;

     private KSLightBox commentLightBox;

     private HTML loggedInUserNameHTML = new HTML();

     private String loggedInUserId;

     private KSTextArea commentTextArea = new KSTextArea();

     private KSButton cancelEditButton = new KSButton("Cancel");

     private KSButton submitCommentButton = new KSButton("Submit");

     private FlexTable commentsTableLayout = new FlexTable();

     private static final DateFormat df = new SimpleDateFormat("MMMM dd, yyyy - hh:mmaaa");

     private Controller controller;    

     private Enum<?> viewEnum;

     private String viewName;    //View name is being used as menu item label   

     VerticalFlowPanel loggedInLabelsPanel = new VerticalFlowPanel();

     VerticalFlowPanel commentEditPanel = new VerticalFlowPanel();

     KSLabel notAuthorizedToAddComments = new KSLabel("The document must be saved before Comments can be added.");

     private EditMode editMode = EditMode.ADD_COMMENT;

     private CommentInfo selectedComment;

     private List<Callback<EditMode>> editControlsCallbacks = new ArrayList<Callback<EditMode>>();

     private String commentTypeKey;

     private Map<String, String> referenceAttributes;

     private KSLabel proposalTitle = new KSLabel();

     private String title;

     private HTML htmlLabel;

     private SectionTitle leaveACommentTitle;

     private HorizontalPanel commentSectionPanel;

     private final KSButton editButton = new KSButton("Edit", ButtonStyle.DEFAULT_ANCHOR);

     private final KSButton deleteButton = new KSButton("Delete", ButtonStyle.DEFAULT_ANCHOR);

     public enum EditMode {

         ADD_COMMENT, UPDATE_COMMENT, VIEW_COMMENT

     }

     public CommentTool(Enum<?> viewEnum, String viewName, String commentTypeKey, String title) {

         this.viewName = viewName;

         this.viewEnum = viewEnum;

         this.commentTypeKey = commentTypeKey;

         this.title = title;

         init();

     }

     public Controller getController() {

         return this.controller;

     }

     public void setController(Controller controller){

         this.controller = controller;

     }

     public Widget asWidget(){

         return commentLightBox.getWidget();

     }

     private OkGroup buttonPanel = new OkGroup(new Callback<OkEnum>(){

         @Override

         public void exec(OkEnum result) {

             if(result == OkEnum.Ok){

             }

         }

     });

     private void init() {

         commentLightBox = new KSLightBox();

         VerticalFlowPanel contentPanel = new VerticalFlowPanel();

         // light box title and instructions

         SectionTitle title = SectionTitle.generateH2Title(this.title);

         title.addStyleName("ks-layout-header");

         htmlLabel = new HTML("<b>All comments posted here will be visible to authors, and " +

                         "to reviewers after you submit the proposal.</b>");

         title.setStyleName("cluProposalTitleSection");

         proposalTitle.setVisible(false);

         contentPanel.add(proposalTitle);

         contentPanel.add(title);

         contentPanel.add(htmlLabel);

         // comments section title

         leaveACommentTitle = SectionTitle.generateH3Title("Leave a Comment");

         leaveACommentTitle.getElement().getStyle().setProperty("borderBottom", "1px solid #D8D8D8");

         leaveACommentTitle.getElement().getStyle().setProperty("marginTop", "2em");

         contentPanel.add(leaveACommentTitle);

         // comments section

         HTML loggedInAsLabel = new HTML("<b>Logged in as:<b/>");

         loggedInLabelsPanel.add(loggedInAsLabel);

         final String userId = Application.getApplicationContext().getUserId();

         commentServiceAsync.getUserRealName(userId, new AsyncCallback<String>() {

             @Override

             public void onFailure(Throwable caught) {

                 loggedInUserNameHTML.setHTML("<b>" + userId + "</b>");

             }

             @Override

             public void onSuccess(String result) {

                 if (result != null && !result.isEmpty()) {

                     loggedInUserNameHTML.setHTML("<b>" + result + "</b>");

                 } else {

                     loggedInUserNameHTML.setHTML("<b>" + userId + "</b>");

                 }

             }

         });

         loggedInUserId = userId;

         loggedInLabelsPanel.add(loggedInUserNameHTML);

         commentTextArea.setSize("500", "100");

         commentEditPanel.add(commentTextArea);

         FlowPanel buttonsPanel = new FlowPanel();

         buttonsPanel.add(cancelEditButton);

         cancelEditButton.addClickHandler(new ClickHandler() {

             @Override

             public void onClick(ClickEvent event) {

                 setEditMode(EditMode.ADD_COMMENT);

             }

         });

         buttonsPanel.add(submitCommentButton);

         submitCommentButton.setEnabled(false);

         commentEditPanel.add(buttonsPanel);

         buttonsPanel.addStyleName("KS-Comment-Button-Panel");

         commentTextArea.addKeyUpHandler(new KeyUpHandler() {

             @Override

             public void onKeyUp(KeyUpEvent event) {

                 submitCommentButton.setEnabled(true);

             }

         });

         // if edit mode is add coment call addComment

         // if edit mode is edit comment call updateComment

         submitCommentButton.addClickHandler(new ClickHandler() {

             @Override

             public void onClick(ClickEvent event) {

                 switch (editMode) {

                     case ADD_COMMENT: {

                         CommentInfo newComment = new CommentInfo();

                         RichTextInfo text = new RichTextInfo();

                         text.setFormatted(commentTextArea.getText());

                         text.setPlain(commentTextArea.getText());

                         newComment.setType(commentTypeKey);

                         newComment.setReferenceId(referenceId);

                         newComment.setReferenceTypeKey(referenceTypeKey);

                         newComment.setState(DtoState.ACTIVE.toString());

                         newComment.setCommentText(text);

                         try {

                             commentServiceAsync.addComment(referenceId, referenceTypeKey, newComment, new KSAsyncCallback<CommentInfo>(){

                                 @Override

                                 public void handleFailure(Throwable caught) {

                                     GWT.log("Add Comment Failed", caught);

                                 }

                                 @Override

                                 public void onSuccess(CommentInfo result) {

                                     refreshComments();

                                 }

                             });

                         } catch (Exception e) {

                             GWT.log("Add Comment Failed", e);

                         }

                         break;

                     }

                     case UPDATE_COMMENT: {

                         if (selectedComment != null) {

                             RichTextInfo text = new RichTextInfo();

                             text.setFormatted(commentTextArea.getText());

                             text.setPlain(commentTextArea.getText());

                             selectedComment.setReferenceId(referenceId);

                             selectedComment.setReferenceTypeKey(referenceTypeKey);

                             selectedComment.setCommentText(text);

 //                            selectedComment.setType("commentType." + referenceType + "." + referenceState);

                             selectedComment.setType(commentTypeKey);

                         }

                         try {

                             commentServiceAsync.updateComment(referenceId, referenceTypeKey, selectedComment, new KSAsyncCallback<CommentInfo>(){

                                 @Override

                                 public void handleFailure(Throwable caught) {

                                     GWT.log("Add Comment Failed", caught);

                                 }

                                 @Override

                                 public void onSuccess(CommentInfo result) {

                                     refreshComments();

                                     setEditMode(EditMode.ADD_COMMENT);

                                 }

                             });

                         } catch (Exception e) {

                             GWT.log("Add Comment Failed", e);

                         }

                         break;

                     }

                 }

             }

         });

         commentSectionPanel = new HorizontalPanel();

         commentSectionPanel.add(loggedInLabelsPanel);

         commentSectionPanel.add(commentEditPanel);

         commentSectionPanel.add(notAuthorizedToAddComments);

         contentPanel.add(commentSectionPanel);

         // comments table

         contentPanel.add(commentsTableLayout);

 //        scrollPanel.setHeight(height)

         commentLightBox.setWidget(contentPanel);

         setEditMode(EditMode.ADD_COMMENT);

     }

     private void checkPermissionsAndRedrawTable(final List<CommentInfo> commentInfos) {

         // check permission to see if user can comment

         commentServiceAsync.isAuthorizedAddComment(referenceId, referenceTypeKey, new KSAsyncCallback<Boolean>() {

             @Override

             public void onFailure(Throwable caught) {

                 GWT.log("Error checking permission for adding comments: ", caught);

                 throw new RuntimeException("Error checking Permissions: ", caught);

             }

             @Override

             public void onSuccess(Boolean result) {

                 GWT.log("User is " + ((result) ? "" : "not ") + 

                         "authorized to add comment.", null);

                 if(referenceId != null && !(referenceId.isEmpty())){

                     notAuthorizedToAddComments.setVisible(false);

                     commentEditPanel.setVisible(result);

                     commentsTableLayout.setVisible(true);

                     redrawCommentsTable(commentInfos);

                 }

                 else{

                     notAuthorizedToAddComments.setVisible(true);

                     commentEditPanel.setVisible(false);

                     commentsTableLayout.setVisible(false);

                 }

             }

         });

     }

     private void redrawCommentsTable(List<CommentInfo> commentInfos) {

         commentsTableLayout.clear();

         editControlsCallbacks.clear();

         if (commentInfos != null) {

             int rowIndex = 0;

             int commentCounter = 0;

             for (final CommentInfo commentInfo : commentInfos) {

                 int columnIndex = 0;

                 if (commentInfo.getType() != null && 

                         commentInfo.getType().startsWith("kuali.comment.type.workflowDecisionRationale")) {

                     // do not display comments for workflow decision rationale.

                     continue;

                 }

                 if (rowIndex == 0) {

                     StringBuilder titleTextSb = new StringBuilder();

                     titleTextSb.append("Comments (").append(commentInfos.size()).append(")");

                     SectionTitle commentsSectionHeader = SectionTitle.generateH3Title(titleTextSb.toString());

                     commentsSectionHeader.getElement().getStyle().setProperty("borderBottom", "1px solid #D8D8D8");

                     commentsTableLayout.setWidget(rowIndex, columnIndex, commentsSectionHeader);

                     commentsTableLayout.getFlexCellFormatter().setColSpan(rowIndex, columnIndex, 3);

                     rowIndex++;

                 }

                 if (commentCounter > 0) {

                     VerticalFlowPanel space = new VerticalFlowPanel();

                     space.getElement().getStyle().setPaddingBottom(5d, Style.Unit.PX);

                     commentsTableLayout.setWidget(rowIndex, columnIndex, space);

                     commentsTableLayout.getFlexCellFormatter().setColSpan(rowIndex, columnIndex, 3);

                     rowIndex++;

                 }

                 VerticalFlowPanel userNameAndTime = new VerticalFlowPanel();

                 final HTML userNameLabel = new HTML();

                 // TODO use user id for now change to user name

                 final String userId = commentInfo.getMetaInfo().getUpdateId();

                 commentServiceAsync.getUserRealName(userId, new AsyncCallback<String>() {

                     @Override

                     public void onFailure(Throwable caught) {

                         userNameLabel.setHTML("<b>" + userId + "</b>");

                     }

                     @Override

                     public void onSuccess(String result) {

                         if (result != null && !result.isEmpty()) {

                             userNameLabel.setHTML("<b>" + result + "</b>");

                         } else {

                             userNameLabel.setHTML("<b>" + userId + "</b>");

                         }

                     }

                 });

                 Date createTime = commentInfo.getMetaInfo().getCreateTime();

                 userNameAndTime.add(userNameLabel);

                 userNameAndTime.add(new KSLabel(df.format(createTime)));

                 userNameAndTime.getElement().getStyle().setPaddingRight(20d, Style.Unit.PX);

                 commentsTableLayout.setWidget(rowIndex, columnIndex, userNameAndTime);

                 columnIndex++;

                 RichTextInfo commentRT = commentInfo.getCommentText();

                 String commentText = commentRT.getPlain();

                 KSLabel commentTextLabel = new KSLabel(commentText);

                 commentTextLabel.getElement().getStyle().setPaddingRight(20d, Style.Unit.PX);

                 commentTextLabel.setWidth("120px");

                 commentTextLabel.getElement().getStyle().setProperty("wordWrap", "break-word");

                 commentsTableLayout.setWidget(rowIndex, columnIndex, commentTextLabel);

                 columnIndex++;

                 editButton.getElement().getStyle().setPadding(5d, Style.Unit.PX);

                 editControlsCallbacks.add(new Callback<EditMode>() {

                     @Override

                     public void exec(EditMode result) {

                         switch (editMode) {

                             case UPDATE_COMMENT:

 //                                editButton.setStyleName("KS-CommentButtonDisabled");

 //                                deleteButton.setStyleName("KS-CommentButtonDisabled");

                                 editButton.setEnabled(false);

                                 deleteButton.setEnabled(false);

                                 break;

                             case ADD_COMMENT:

 //                                editButton.setStyleName("KS-CommentButton");

 //                                deleteButton.setStyleName("KS-CommentButton");

                                 editButton.setEnabled(true);

                                 deleteButton.setEnabled(true);

                                 break;

                         }

                     }

                 });

                 editButton.addClickHandler(new ClickHandler() {

                     @Override

                     public void onClick(ClickEvent event) {

                         String commentText = (commentInfo == null ||

                                 commentInfo.getCommentText() == null)? "" :

                                     commentInfo.getCommentText().getPlain();

                         selectedComment = commentInfo;

                         commentTextArea.setText(commentText);

                         commentTextArea.setFocus(true);

                         setEditMode(EditMode.UPDATE_COMMENT);

                     }

                 });

                 deleteButton.addClickHandler(new ClickHandler() {

                     @Override

                     public void onClick(ClickEvent event) {

                             final ConfirmationDialog confirmDeletion =

                                 new ConfirmationDialog("Delete Comment",  

                                     "You are about to delete a comment.  Are you sure?");

                             confirmDeletion.getConfirmButton().addClickHandler(new ClickHandler(){

                                 @Override

                                 public void onClick(ClickEvent event) {

                                     try {

                                         commentServiceAsync.removeComment(commentInfo.getId(), 

                                                 referenceId, referenceTypeKey, 

                                                 new KSAsyncCallback<StatusInfo>(){

                                             @Override

                                             public void handleFailure(Throwable caught) {

                                                 GWT.log("remove Comment Failed", caught);

                                             }

                                             @Override

                                             public void onSuccess(StatusInfo result) {

                                                 confirmDeletion.hide();

                                                 refreshComments();

                                             }

                                         });

                                     } catch (Exception e) {

                                         GWT.log("remove Comment Failed", e);

                                     }

                                 }

                             });

                             confirmDeletion.show();

                     }

                 });

                 commentsTableLayout.setWidget(rowIndex, columnIndex, editButton);

                 columnIndex++;

                 commentsTableLayout.setWidget(rowIndex, columnIndex, deleteButton);

                 columnIndex++;

                 if (userId == null || !userId.equals(this.loggedInUserId)) {

                     editButton.setVisible(false);

                     deleteButton.setVisible(false);

                 }

                 rowIndex++;

                 commentCounter++;

             }

             setEditMode(EditMode.ADD_COMMENT);

         }

     }

     public void setEditMode(EditMode editMode) {

         this.editMode = editMode;

         switch (editMode) {

             case UPDATE_COMMENT:

                 cancelEditButton.setVisible(true);

                 if (editControlsCallbacks != null) {

                     for (Callback<EditMode> callback : editControlsCallbacks) {

                         callback.exec(EditMode.UPDATE_COMMENT);

                     }

                 }

                 break;

             case ADD_COMMENT:

                 cancelEditButton.setVisible(false);

                 commentTextArea.setText("");

                 if (editControlsCallbacks != null) {

                     for (Callback<EditMode> callback : editControlsCallbacks) {

                         callback.exec(EditMode.ADD_COMMENT);

                     }

                 }

                 break;

             case VIEW_COMMENT:

                 htmlLabel.setVisible(false);

                 leaveACommentTitle.setVisible(false);

                 commentSectionPanel.setVisible(false);

                 editButton.setVisible(false);

                 deleteButton.setVisible(false);

                 break;

         }

     }

     public void refreshComments(){

         //rpc call to get all current comments and populate into comment list

         try {

             commentServiceAsync.getComments(referenceId, referenceTypeKey, new KSAsyncCallback<List<CommentInfo>>(){

                 @Override

                 public void handleFailure(Throwable caught) {

                     GWT.log("getComments failed", caught);

                 }

                 @Override

                 public void onSuccess(List<CommentInfo> result) {

                     if (result != null && !result.isEmpty()) {

                         Collections.sort(result, new Comparator<CommentInfo>(){

                             @Override

                             public int compare(CommentInfo comment1, CommentInfo comment2) {

                                 if(comment1.getMetaInfo().getCreateTime().after(comment2.getMetaInfo().getCreateTime())){

                                     return -1;

                                 }

                                 else if(comment1.getMetaInfo().getCreateTime().before(comment2.getMetaInfo().getCreateTime())){

                                     return 1;

                                 }

                                 else{

                                     //equal

                                     return 0;

                                 }

                             }

                         });

                     }

                     checkPermissionsAndRedrawTable(result);

                 }

             });

         } catch (Exception e) {

             Window.alert("Failed to refresh Comments");

             GWT.log("refresh Comments Failed",e);

         }

     }

 //    private void redrawCommentsTable(FlexTable tableLayout) {

 //        StringBuilder titleTextSb = new StringBuilder();

 //        titleTextSb.append("Comments (").append(docInfos.size()).append(")");

 //        SectionTitle uploadedFileSectionHeader = SectionTitle.generateH3Title(titleTextSb.toString());

 //        uploadedFileSectionHeader.getElement().getStyle().setProperty("borderBottom", "1px solid #D8D8D8");

 //        tableLayout.setWidget(rowIndex, columnIndex, uploadedFileSectionHeader);

 //        tableLayout.getFlexCellFormatter().setColSpan(rowIndex, columnIndex, 3);

 //    }

     @Override

     public String getReferenceId() {

         return referenceId;

     }

     @Override

     public String getReferenceState() {

         return referenceState;

     }

     @Override

     public String getReferenceType() {

         return referenceType;

     }

     @Override

     public String getReferenceTypeKey() {

         return referenceTypeKey;

     }

     @Override

     public void setReferenceId(String id) {

         this.referenceId = id;

     }

     @Override

     public void setReferenceState(String state) {

         this.referenceState = state;

     }

     @Override

     public void setReferenceType(String type) {

         this.referenceType = type;

     }

     @Override

     public void setReferenceTypeKey(String key) {

         this.referenceTypeKey = key;

     }

     public void setReferenceAttributes(Map<String, String> referenceAttributes) {

         this.referenceAttributes = referenceAttributes;

     }

     public void show() {

         controller.requestModel(ReferenceModel.class, 

                 new ModelRequestCallback<ReferenceModel>(){

             public void onModelReady(ReferenceModel model) {

                 String proposalTitleString = null;

                 setReferenceId(model.getReferenceId());

                 setReferenceTypeKey(model.getReferenceTypeKey());

                 setReferenceType(model.getReferenceType());

                 setReferenceState(model.getReferenceState());

                 setReferenceAttributes(model.getReferenceAttributes());

                 proposalTitleString = (model.getReferenceAttributes() == null)? null : 

                     model.getReferenceAttributes().get("name");

                 if (proposalTitleString != null && !proposalTitleString.trim().isEmpty()) {

                     proposalTitle.setText(proposalTitleString);

                     proposalTitle.setVisible(true);

                 } else {

                     proposalTitle.setText("");

                     proposalTitle.setVisible(false);

                 }

                 refreshComments();

                 commentLightBox.show();

             }

             public void onRequestFail(Throwable cause) {

                 Window.alert(cause.toString());

             }

         });

     }

 }