package id.co.gtc.erhacam;

import javafx.animation.PauseTransition;
import javafx.application.Platform;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Screen;
import javafx.stage.Stage;
import javafx.stage.StageStyle;
import javafx.util.Duration;

import java.util.Optional;

public class AutoCloseAlert {

    private static Stage currentAlertStage;
    public static String shownTitle  = "";
    public static String shownContent = "";
    public static String shownHeader = "";

    private static void clear(){
        shownTitle = "";
        shownContent = "";
        shownHeader = "";
    }

    /**
     * Close the current alert if it is shown
     */
    public static void close(){
        Optional.ofNullable(currentAlertStage).ifPresent(Stage::close);
        currentAlertStage = null;
        clear();
    }

    /**
     * Show an alert with a title, header, content, and automatically close after a few seconds
     * If called several times, the previous alert will be closed before showing a new one
     * @param title the title of the alert
     * @param header the header of the alert
     * @param content the content of the alert
     * @param seconds the number of seconds before the alert is closed, or put 0 to keep it open
     */
    public static void show(String title, String header, String content, int seconds) {
        Platform.runLater(()->{
            // close previous alert before showing a new one
            Optional.ofNullable(currentAlertStage).ifPresent(Stage::close);

            Stage alertStage = new Stage();
            alertStage.initModality(Modality.APPLICATION_MODAL);
            alertStage.initStyle(StageStyle.UTILITY);
            alertStage.setAlwaysOnTop(true);
            alertStage.setResizable(false);

            double screenwidth = Screen.getPrimary().getVisualBounds().getWidth();
            double width = screenwidth/4;
            double height = width * 9 / 16;
            Label headerLabel = new Label(header);
            headerLabel.setStyle("-fx-font-weight: bold; -fx-font-size: 16px;");
            headerLabel.setMinHeight(height*0.25);
            Label contentLabel = new Label(content);
            contentLabel.setStyle("-fx-font-size: 12px;");
            contentLabel.setMinHeight(height*0.75);

            VBox root = new VBox(10, headerLabel, contentLabel);
            root.setPrefSize(width, height);
            root.setAlignment(Pos.CENTER);

            Scene scene = new Scene(root);
            alertStage.setScene(scene);

            alertStage.setTitle(title);
            currentAlertStage = alertStage;

            alertStage.show();

            shownHeader = header;
            shownContent = content;
            shownTitle = title;

            if (seconds>0){
                PauseTransition delay = new PauseTransition(Duration.seconds(seconds));
                delay.setOnFinished(e -> {
                    alertStage.close();
                    if (currentAlertStage == alertStage) {
                        currentAlertStage = null;
                    }
                    clear();
                } );
                delay.play();
            }

        });

    }
}