package com.coder.client.gui.selectProject;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;

import zutil.log.LogUtil;

import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.ListCell;
import javafx.scene.control.ListView;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.input.MouseButton;
import javafx.scene.input.MouseEvent;
import javafx.util.Callback;

import com.coder.client.CoderClient;
import com.coder.client.gui.GuiWindow;
import com.coder.client.session.ProjectListRspMsgListener;
import com.coder.client.session.ProjectRspMsgListener;
import com.coder.server.message.CoderMessage;
import com.coder.server.message.ProjectListData;
import com.coder.server.message.ProjectListReqMsg;
import com.coder.server.message.ProjectListRspMsg;
import com.coder.server.message.ProjectRspMsg;

public class SelectProjectDialog extends GuiWindow {
	public static final Logger logger = LogUtil.getLogger();
	private ObservableList<ProjectListItem> projectList;
	private CoderClient client;

	@FXML private ListView<ProjectListItem> projectListView;
	@FXML private Button newProjectButton;
	@FXML private Button cancelButton;
	@FXML private Button openButton;
	@FXML private Label errorLabel;

	public SelectProjectDialog(final CoderClient client) throws IOException {
		super(SelectProjectDialog.class.getResource("SelectProjectDialog.fxml"));		
		this.client = client;
		
		client.getSessionHandler().addMessageListener(new ProjectListRspMsgListener() {
			@Override
			public void messageReceived(final ProjectListRspMsg msg) {
				logger.fine("a ProjectListRsp received");
				for(String projectName : msg.keySet()){
					ProjectListData projectData = msg.get(projectName);
					addProjectToList(projectName, projectData);
				}
			}
		});
		
		client.getSessionHandler().addMessageListener(new ProjectRspMsgListener() {
			@Override
			public void messageReceived(final ProjectRspMsg msg) {
				logger.fine("a ProjectRspMsg received");
				if(msg.error != null){
					logger.severe("Server responded on the project request with the following error message: " + msg.error);
					client.getProjectHandler().setProject(null);
					setErrorMessage("ERROR: " + msg.error);
				}else{
					setErrorMessage("");
					client.getProjectHandler().setProject(msg.name);
				}
			}
		});
	}

	@Override
	protected void willShow() {
		clearProjectList();
		if(!client.getProjectHandler().isProjectSet()){
			sendProjectListReq();
		}else{
			logger.fine("will outofire the open button since all parameters are already set");
			openButton.setDisable(false);
			openButton.fire();
		}
		openButton.setDisable(true);
		projectListView.requestFocus();
	}

	@Override
	public void initialize(URL fxmlFileLocation, ResourceBundle resources) {
		errorLabel.setText("");
		projectList = FXCollections.observableArrayList();
		projectListView.setItems(projectList);
		projectListView.setCellFactory(new Callback<ListView<ProjectListItem>, ListCell<ProjectListItem>>(){
			@Override
			public ListCell<ProjectListItem> call(ListView<ProjectListItem> arg0) {
				try {
					return new ProjectListCell();
				} catch (IOException e) {
					logger.log(Level.SEVERE, "could not crate a ProjectListCell instance", e);
				}
				return null;
			}
		});
		projectListView.getSelectionModel().selectedItemProperty().addListener(new ChangeListener<ProjectListItem>() {
			@Override
			public void changed(ObservableValue<? extends ProjectListItem> observable, ProjectListItem oldValue, ProjectListItem vewValue) {
				if(observable.getValue() != null){
					logger.fine("ProjectListItem [" + observable.getValue() + "] selected in the project list");
					openButton.setDisable(false);
				}else{
					openButton.setDisable(true);
				}
			}
		});
	}
	
	private void sendProjectListReq(){
		//send a request for a new list of projects
		CoderMessage msg = new CoderMessage();
		msg.ProjectListReq = new ProjectListReqMsg();
		client.getSessionHandler().sendMessage(msg);
	}
	
	@FXML
	protected void mouseClickedOnList(MouseEvent event){
		if(event.getButton().equals(MouseButton.PRIMARY)){
            if(event.getClickCount() == 2){	//if doublecklick
                openButton.fire();
            }
        }
	}
	
	@FXML
    protected void keyPressed(KeyEvent event) {
		if(event.getCode() == KeyCode.ENTER){
			logger.fine("User pressed the ENTER key");
			openButton.fire();
		}else if(event.getCode() == KeyCode.ESCAPE){
			logger.fine("User pressed the ESCAPE key");
			cancelButton.fire();
		}else if(event.getCode() == KeyCode.N && event.isControlDown()){	//CTRL+N
			logger.fine("User pressed CTRL+N");
			newProjectButton.fire();
		}
    }
	
	@FXML
	protected void newProject(ActionEvent event){
		logger.fine("new project button triggered");
		client.getProjectHandler().createNewProject();
	}
	
	@FXML
	protected void cancel(ActionEvent event){
		logger.fine("cancel button triggered");
		client.getSessionHandler().closeCurrentSession(false);
	}
	
	@FXML
	protected void refresh(ActionEvent event){
		logger.fine("refresh button triggered");
		clearProjectList();
		sendProjectListReq();
	}
	
	@FXML
	protected void open(ActionEvent event){
		logger.fine("open button triggered");
		if(!client.getProjectHandler().isProjectSet()){
			ProjectListItem selectedItem = projectListView.getSelectionModel().getSelectedItem();
			client.getProjectHandler().setProject(selectedItem.getName());
		}
		client.getProjectHandler().openProject();
	}
	
	public void clearProjectList(){
		logger.fine("Clearing project list");
		projectList.clear();
	}

	public void addProjectToList(String projectName, ProjectListData projectData) {
		logger.fine("Adding project \"" + projectName + "\" of type " + projectData.type + " to the project list");
		ProjectListItem item = new ProjectListItem(projectName, projectData.type, projectData.description);
		this.projectList.add(item);
	}

	@Override
	protected String getTitle() {
		return "Open Project";
	}

	private void setErrorMessage(String errorMsg){
		this.errorLabel.setText(errorMsg);
	}

	@Override
	protected String getDescriptiveName() {
		return "Select Project Dialog";
	}
	
}