package envoy.client.ui.control;

import java.io.ByteArrayInputStream;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
import java.util.Map;
import java.util.logging.*;

import javafx.geometry.*;
import javafx.scene.control.*;
import javafx.scene.image.*;
import javafx.scene.layout.*;

import envoy.data.*;
import envoy.data.Message.MessageStatus;
import envoy.util.EnvoyLog;

import envoy.client.data.*;
import envoy.client.net.Client;
import envoy.client.util.*;

/**
 * This class transforms a single {@link Message} into a UI component.
 *
 * @author Leon Hofmeister
 * @author Maximilian Käfer
 * @since Envoy Client v0.1-beta
 */
public final class MessageControl extends Label {

	private final boolean ownMessage;

	private final LocalDB	localDB	= context.getLocalDB();
	private final Client	client	= context.getClient();

	private static final Context					context			= Context.getInstance();
	private static final DateTimeFormatter			dateFormat		=
		DateTimeFormatter.ofPattern("dd.MM.yyyy HH:mm:ss")
			.withZone(ZoneId.systemDefault());
	private static final Map<MessageStatus, Image>	statusImages	=
		IconUtil.loadByEnum(MessageStatus.class, 16);
	private static final Logger						logger			=
		EnvoyLog.getLogger(MessageControl.class);

	/**
	 * @param message the message that should be formatted
	 * @since Envoy Client v0.1-beta
	 */
	public MessageControl(Message message) {
		ownMessage = message.getSenderID() == localDB.getUser().getID();

		// Creating the underlying VBox and the dateLabel
		final var hbox = new HBox();
		if (message.getSenderID() != localDB.getUser().getID() && message instanceof GroupMessage) {
			// Displaying the name of the sender in a group
			final var label = new Label();
			label.getStyleClass().add("group-member-names");
			label.setText(localDB.getUsers()
				.values()
				.stream()
				.filter(c -> c.getID() == message.getSenderID())
				.findFirst()
				.map(User::getName)
				.orElse("Unknown User"));
			label.setPadding(new Insets(0, 5, 0, 0));
			hbox.getChildren().add(label);
		}
		hbox.getChildren().add(new Label(dateFormat.format(message.getCreationDate())));
		final var vbox = new VBox(hbox);

		// Creating the actions for the MenuItems
		final var	contextMenu	= new ContextMenu();
		final var	items		= contextMenu.getItems();

		// Copy message action
		if (!message.getText().isEmpty()) {
			final var copyMenuItem = new MenuItem("Copy Text");
			copyMenuItem.setOnAction(e -> MessageUtil.copyMessageText(message));
			items.add(copyMenuItem);
		}

		// Delete message
		final var deleteMenuItem = new MenuItem("Delete locally");
		deleteMenuItem.setOnAction(e -> MessageUtil.deleteMessage(message));
		items.add(deleteMenuItem);

		// As long as these types of messages are not implemented and no caches are
		// defined for them, we only want them to appear when being online
		if (client.isOnline()) {

			// Forward menu item
			final var forwardMenuItem = new MenuItem("Forward");
			forwardMenuItem.setOnAction(e -> MessageUtil.forwardMessage(message));
			items.add(forwardMenuItem);

			// Quote menu item
			final var quoteMenuItem = new MenuItem("Quote");
			quoteMenuItem.setOnAction(e -> MessageUtil.quoteMessage(message));
			items.add(quoteMenuItem);
		}

		// Info actions
		final var infoMenuItem = new MenuItem("Info");
		infoMenuItem.setOnAction(e -> loadMessageInfoScene(message));
		items.add(infoMenuItem);

		// Handling message attachment display
		// TODO: Add missing attachment types
		if (message.hasAttachment()) {
			switch (message.getAttachment().getType()) {
				case PICTURE:
					vbox.getChildren()
						.add(new ImageView(
							new Image(new ByteArrayInputStream(message.getAttachment().getData()),
								256, 256, true, true)));
					break;
				case VIDEO:
					break;
				case VOICE:
					vbox.getChildren().add(new AudioControl(message.getAttachment().getData()));
					break;
				case DOCUMENT:
					break;
			}
			final var saveAttachment = new MenuItem("Save attachment");
			saveAttachment.setOnAction(e -> MessageUtil.saveAttachment(message));
			items.add(saveAttachment);
		}
		// Creating the textLabel
		final var textLabel = new Label(message.getText());
		textLabel.setMaxWidth(430);
		textLabel.setWrapText(true);
		final var hBoxBottom = new HBox();
		hBoxBottom.getChildren().add(textLabel);
		// Setting the message status icon and background color
		if (message.getSenderID() == localDB.getUser().getID()) {
			final var statusIcon = new ImageView(statusImages.get(message.getStatus()));
			statusIcon.setPreserveRatio(true);
			final var space = new Region();
			HBox.setHgrow(space, Priority.ALWAYS);
			hBoxBottom.getChildren().add(space);
			hBoxBottom.getChildren().add(statusIcon);
			hBoxBottom.setAlignment(Pos.BOTTOM_RIGHT);
			getStyleClass().add("own-message");
			hbox.setAlignment(Pos.CENTER_RIGHT);
		} else
			getStyleClass().add("received-message");
		vbox.getChildren().add(hBoxBottom);
		// Adjusting height and weight of the cell to the corresponding ListView
		paddingProperty().setValue(new Insets(5, 20, 5, 20));
		setContextMenu(contextMenu);
		setGraphic(vbox);
	}

	private void loadMessageInfoScene(Message message) {
		logger.log(Level.FINEST, "message info scene was requested for " + message);
	}

	/**
	 * @return whether the message stored by this {@code MessageControl} has been sent by this user
	 *         of Envoy
	 * @since Envoy Client v0.1-beta
	 */
	public boolean isOwnMessage() { return ownMessage; }
}