HW-07-JavaFX/src/main/java/sbu/javafx/MusicController.java

package sbu.javafx;

import javafx.collections.FXCollections;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.control.cell.PropertyValueFactory;
import javafx.scene.media.Media;
import javafx.scene.media.MediaPlayer;
import javafx.stage.Stage;

import java.io.IOException;

public class MusicController {

    @FXML private Label nowPlayingLabel;
    @FXML private TableView<Song> songsTable;
    @FXML private TableColumn<Song, String> titleCol;
    @FXML private TableColumn<Song, String> artistCol;
    @FXML private TableColumn<Song, String> durationCol;

    // There is no connection between Song and Button so we should use void
    @FXML private TableColumn<Song, Void> addCol;
    @FXML private TableColumn<Song, Void> playCol;

    private Song nowPlayingSong = null;
    private final ObservableList<Song> playlist = FXCollections.observableArrayList();
    private MediaPlayer mediaPlayer;

    @FXML
    public void initialize() {
        // connect song name,artist name,duration to song class
        titleCol.setCellValueFactory(new PropertyValueFactory<>("title"));
        artistCol.setCellValueFactory(new PropertyValueFactory<>("artistName"));
        durationCol.setCellValueFactory(new PropertyValueFactory<>("duration"));

        // Add button
        addCol.setCellFactory(param -> new TableCell<>() {
            private final Button btn = new Button("Add");

            {
                btn.getStyleClass().add("add-button");

                btn.setOnAction(event -> {
                    Song song = getTableView().getItems().get(getIndex());
                    addToPlaylist(song);
                });
            }

            @Override
            protected void updateItem(Void item, boolean empty) {
                super.updateItem(item, empty);

                if (empty) {
                    setGraphic(null);
                    setText(null);
                } else {
                    Song song = getTableView().getItems().get(getIndex());

                    if (song.isAdded()) {
                        setGraphic(null);
                        setText("Added ✓");
                        setStyle("-fx-text-fill: #2ecc71; -fx-font-weight: bold;");
                    } else {
                        setGraphic(btn);
                        setText(null);
                        setStyle("");
                    }
                }
            }
        });

        // Play button cell
        playCol.setCellFactory(param -> new TableCell<>() {
            private final Button btn = new Button("Play");
            {
                btn.setOnAction(e -> {
                    nowPlayingSong = getTableView().getItems().get(getIndex());
                   handlePlayAction();
                });
            }
            @Override
            protected void updateItem(Void item, boolean empty) {
                super.updateItem(item, empty);
                setGraphic(empty ? null : btn);
            }
        });

        ObservableList<Song> songList = FXCollections.observableArrayList(
                new Song("Vasiat2", "Naaji", "5:26", "/Musics/Naaji.mp3"),
                new Song("SogandBe", "Unknown", "1:55", "/Musics/SogandBe.mp3"),
                new Song("Telo", "Hossein", "3:07", "/Musics/Telo.mp3")
        );
        songsTable.setItems(songList);

    }

    @FXML
    public void handlePlayAction() {
        if (nowPlayingSong == null) return;

        try {
            if (mediaPlayer != null) {
                mediaPlayer.stop();
                mediaPlayer.dispose();
            }

            String filePath = nowPlayingSong.getFilePath();
            var resource = getClass().getResource(filePath);

            if (resource == null) {
                System.out.println("Error: File not found in resource path! Path checked: " + filePath);
                return;
            }

            String mediaUrl = resource.toExternalForm();

            Media media = new Media(mediaUrl);
            mediaPlayer = new MediaPlayer(media);

            nowPlayingLabel.setText(nowPlayingSong.getTitle() + " - " + nowPlayingSong.getArtistName());
            mediaPlayer.play();

        } catch (Exception e) {
            System.out.println("Error while playing audio file: ");
            e.printStackTrace();
        }
    }


    public void addToPlaylist(Song song) {
        if (!playlist.contains(song)) {
            playlist.add(song);
            song.setAdded(true);
            songsTable.refresh();
        }
    }


    public void openPlaylistWindow() {
        try {
            FXMLLoader loader = new FXMLLoader(getClass().getResource("Playlist.fxml"));
            Parent root = loader.load();

            PlaylistController controller = loader.getController();
            controller.setPlaylist(playlist);

            Stage stage = new Stage();
            stage.setTitle("Playlist");
            Scene scene = new Scene(root);
            stage.setScene(scene);
            stage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}