import java.util.*;
import java.io.*;

/** <h1>jMusicHub</h1>
 *
 * The jMusicHub class is basically the app.
 * It is used to launch the whole process.
 *
 * @author  Aimeric ADJUTOR
 * @version 1.0
 * @since   2020-11-13
 * */

public class jMusicHub {

	/** <h2>addSong</h2>
	 * add Song is used to add songs thanks to the "c" option
	 * @param scan Scanner Object
	 */
	public static Song addSong(Scanner scan){
		System.out.println("Adding a song...");
		System.out.printf("Title : ");
		String title = scan.nextLine();
		System.out.printf("Duration (in seconds) : ");
		int duration = scan.nextInt();
		System.out.printf("Content path : ");
		String trash = scan.nextLine(); //Using this because the content scan is skip after a nexInt
		String content = scan.nextLine();
		System.out.printf("Artist : ");
		String artist = scan.nextLine();
		System.out.printf("Genre (JAZZ, CLASSICAL, HIPHOP, ROCK, POP, RAP) : ");
		String choosedGenre = scan.nextLine();
		choosedGenre = choosedGenre.toUpperCase();
		Genre genre = Genre.valueOf(choosedGenre);
		System.out.println("");

		System.out.println("Do you confirm the addition of the following song ?");
		System.out.println("Title : " + title);
		System.out.println("Duration : " + duration);
		System.out.println("Content path : " + content);
		System.out.println("Artist : " + artist);
		System.out.println("Genre : " + genre);
		System.out.println("[Y/n]");
		String confirm = scan.nextLine();

		if (confirm.equalsIgnoreCase("Y")){ //if the user is ok with what he typed, create a song obj
			Song newSong = new Song(title, duration, content, artist,genre);
			return newSong;
		} else {
			System.out.println("Aborting...");
			System.out.println("");
			return null;
		}
	}

/** <h2>addAudioBook</h2>
	 * add Song is used to add songs thanks to the "l" option
	 * @param scan Scanner Object
	 */
	public static AudioBook addAudioBook(Scanner scan){
		System.out.println("Adding an audiobook...");
		System.out.printf("Title : ");
		String title = scan.nextLine();
		System.out.printf("Duration (in seconds) : ");
		int duration = scan.nextInt();
		System.out.printf("Content path : ");
		String trash = scan.nextLine(); //Using this because the content scan is skip after a nexInt
		String content = scan.nextLine();
		System.out.printf("Author : ");
		String author = scan.nextLine();
		System.out.printf("Language (FRENCH, ENGLISH, ITALIAN, SPANISH, GERMAN) : ");
		String choosedLanguage = scan.nextLine();
		choosedLanguage = choosedLanguage.toUpperCase();
		Language language = Language.valueOf(choosedLanguage);
		System.out.printf("Category (TEEN, NOVEL, THEATER, SPEECH, DOCUMENTARY) : ");
		String choosedCategory = scan.nextLine();
		choosedCategory = choosedCategory.toUpperCase();
		Category category = Category.valueOf(choosedCategory);
		System.out.println("");

		System.out.println("Do you confirm the addition of the following song ?");
		System.out.println("Title : " + title);
		System.out.println("Duration : " + duration);
		System.out.println("Content path : " + content);
		System.out.println("Author : " + author);
		System.out.println("Language : " + language);
		System.out.println("Category : " + category);
		System.out.println("[Y/n]");
		String confirm = scan.nextLine();

		if (confirm.equalsIgnoreCase("Y")){ //if the user is ok with what he typed, create a audiobook obj
			AudioBook newAudioBook = new AudioBook(title, duration, content, author, language, category);
			return newAudioBook;
		} else {
			System.out.println("Aborting...");
			System.out.println("");
			return null;
		}
	}

/**<h2>save</h2>
 * save is used by the command "s"
 * @param filename String
 * @param elements ArrayList
 * */
	@SuppressWarnings ("rawtypes")
	public static void save(String filename, ArrayList elements){

		// Serialization
		try {

		    // Saving of object in a file
		    FileOutputStream file = new FileOutputStream(filename);
		    ObjectOutputStream out = new ObjectOutputStream(file);

		    // Method for serialization of object
		    out.writeObject(elements);

		    out.close();
		    file.close();

		    System.out.println("Your " + filename + " have been saved.");
		}
		catch (IOException ex) {
		    System.out.println("IOException is caught");
		}
	}

/**<h2>list</h2>
 * list is called when using the "AB" and "S" commands in order to list the elements in respective files.
 * @param filename String
 * */

	public static void list(String filename){

		// Deserialization
	        try {
			// Reading the object from a file
			FileInputStream file = new FileInputStream(filename);
			ObjectInputStream in = new ObjectInputStream(file);


			// Method for deserialization of object
			switch(filename) {
				case "songs":
					@SuppressWarnings("unchecked")
					ArrayList<Song> songs = (ArrayList<Song>)in.readObject();
					in.close();
					file.close();

					System.out.println("\nSaved "+filename+" :\n");

					for (Song s : songs ){
						System.out.println(s);
					}
					break;
				case "audiobooks" :
					@SuppressWarnings("unchecked")
					ArrayList<AudioBook> audiobooks = (ArrayList<AudioBook>)in.readObject();
					in.close();
					file.close();

					System.out.println("\nSaved "+filename+" :\n");

					for (AudioBook ab : audiobooks ){
						System.out.println(ab);
					}

					break;
			}



		}
 		catch (IOException ex) {System.out.println(filename+ " file missing.");}
		catch (ClassNotFoundException ex) {System.out.println("ClassNotFoundException is caught");}
	}

/**<h2>extract</h2>
 * Extract is used to print the content of the files and put them in the ArrayList used to add elements.
 * @param String filename
 * */
	@SuppressWarnings("rawtypes")
	public static ArrayList extract(String filename){

		// Deserialization
	        try {
					FileInputStream file = new FileInputStream(filename);
					ObjectInputStream in = new ObjectInputStream(file);

			switch (filename) {
				case "songs" :
					@SuppressWarnings("unchecked")
					ArrayList<Song> songs = (ArrayList<Song>)in.readObject();

					in.close();
					file.close();

					return new ArrayList<Song>(songs);
				case "audiobooks" :
					@SuppressWarnings("unchecked")
					ArrayList<AudioBook> audiobooks = (ArrayList<AudioBook>)in.readObject();

					in.close();
					file.close();

					return new ArrayList<AudioBook>(audiobooks);
				default :
					return new ArrayList();
			}
		}
 		catch (IOException ex) { //mainly occur bc file is missing, leading to an empty ListArray
			System.out.println("\n"+filename+" file missing.\n");
			return new ArrayList() ;}
		catch (ClassNotFoundException ex) {System.out.println("ClassNotFoundException is caught");return null;
		}
	}

	public jMusicHub() {

		System.out.println("Welcome to the jMusicHub !\n");

		Scanner scan = new Scanner(System.in);
		String userInput; //Used to get the user's inputs.

		System.out.println("Extraction beginning...");
		@SuppressWarnings("unchecked")
		ArrayList<Song> songs = extract("songs");
		@SuppressWarnings("unchecked")
		ArrayList<AudioBook> audiobooks = extract("audiobooks");

		list("songs");
		list("audiobooks");
		System.out.println("\nExtraction done.");

		do {
			System.out.println("What do you want to do? [h for help]");
			userInput = scan.nextLine();
			switch(userInput) {
				case "h" : //page help
					System.out.printf("c: add a new song\na: add a new album\n+: add an existing song to an album\nl: add a new audiobook\np: create a new playlist from existing songs and audiobooks\n-: delete a playlist\ns: save playlists, albums, songs and audiobooks into the concerned files\nS: List all your saved songs\nAB : List all your saved audiobooks\nh: print this help screen\nq: quit the program\n");
					break;
				case "q" : //quit
					System.out.println("Goodbye !");
					break;

				case "c": //add a new song
					try { //If something goes wrong, abort
						Song newSong=addSong(scan);
						if (newSong != null){
							int songsSize = songs.size();
							newSong.setId(songsSize);
							songs.add(newSong);
							System.out.println("\nActual content of your songs list (you must save it (s) to do anything else with your songs) :");
							for (Song iSong : songs){
							   System.out.println(iSong);
							}
							System.out.println("");

						}
					} catch (InputMismatchException | IllegalArgumentException e) {
						System.out.println("You typed something wrong... I'm aborting..");
						System.out.println("");
					}
					break;

				case "a": //add a new album
					break;
				case "+":
					break;
				case "l": //add a new audiobook
					try { //If something goes wrong, abort
						AudioBook newAudioBook=addAudioBook(scan);
						if (newAudioBook != null){
							int audiobookSize = audiobooks.size();
							newAudioBook.setId(audiobookSize);
							audiobooks.add(newAudioBook);
							System.out.println("\nActual content of your audiobook list (you must save it (s) to do anything else with your audiobooks) :");
							for (AudioBook iAudioBook : audiobooks){
							   System.out.println(iAudioBook);
							}
							System.out.println("");

						}
					} catch (InputMismatchException | IllegalArgumentException e) {
						System.out.println("You typed something wrong... I'm aborting..");
						System.out.println("");
					}
					break;
				case "p":
					break;
				case "-":
					break;
				case "s": //save songs, audiobooks, playlist and albums
					save("songs", songs);
					save("audiobooks", audiobooks);
					break;
				case "S": //print songs contained in songs
					list("songs");
					break;
				case "AB": //print audiobooks containd in audiobooks
					list("audiobooks");
					break;
				default :
					System.out.println("Unknown command. Type h for help.");

			}
		} while(!userInput.equals("q"));

	}

	public static void main(String[] args) {
		new jMusicHub();
	}
}