package preparationuap;
import java.util.*;
import java.security.SecureRandom;

/**
 *
 * @author wilsonsentanoe
 */
public class PreparationUAP {

    /**
     * @param args the command line arguments
     */
    public static Scanner scan = new Scanner(System.in);

    public static ArrayList<String> arrTitle = new ArrayList<String>();
    public static ArrayList<String> arrAuthor = new ArrayList<String>();
    public static ArrayList<String> arrPublisher = new ArrayList<String>();
    public static ArrayList<String> arrYear = new ArrayList<String>();
    public static ArrayList<String> arrISBN = new ArrayList<String>();
    public static ArrayList<String> arrShelf = new ArrayList<String>();
    public static ArrayList<String> arrBookID = new ArrayList<String>();

    public static void clearScreen(){
        for(int i = 0; i < 30; i++){
            System.out.println("");
        }
    }

    public static String getNumeric(int len) {

        char[] ch = "0123456789".toCharArray();

        char[] c = new char[len];
        SecureRandom random = new SecureRandom();
        for (int i = 0; i < len; i++) {
            c[i] = ch[random.nextInt(ch.length)];
        }

        return new String(c);
    }

    public static String getAlpha(int len) {

        char[] ch = "ABCDEFGHIJKLMNOPQRSTUVWXYZ".toCharArray();

        char[] c = new char[len];
        SecureRandom random = new SecureRandom();
        for (int i = 0; i < len; i++) {
            c[i] = ch[random.nextInt(ch.length)];
        }

        return new String(c);
    }

    public static String getAlphaNum(){
        String random = getNumeric(2) + getAlpha(3);

        return random;
    }

    public static void insert(){
        String title = "", author = "", publisher = "";
        int year = 0;
        long isbn = 0;
        String isbnString = "", yearString = "";
        String shelf = "";

        clearScreen();

        do{
            System.out.print("Input Title [not more than 35 characters]: ");
            title = scan.nextLine();
        }while(title.length() > 35);

        do{
            System.out.print("Input Author [lastname, firstname][<30]: ");
            author = scan.nextLine();
        }while((author.length() > 30) || !(author.contains(", ")));

        do{
            System.out.print("Input Publisher [not more than 20 characters]: ");
            publisher = scan.nextLine();
        }while(publisher.length() > 20);

        do{
            System.out.print("Input Year Published [must be newer than 1970]: ");
            try{
                year = scan.nextInt();
            }catch(Exception e){}
            scan.nextLine();
        }while(year < 1970 || year > 2018);

        yearString = Integer.toString(year);

        do{
            System.out.print("Input ISBN: ");
            try{
                isbn = scan.nextLong();
            }catch(Exception e){}
            scan.nextLine();

            isbnString = Long.toString(isbn);
        }while(isbnString.length() != 13);

        do{
            System.out.print("Input Shelf [1-9][A-G]: ");
            shelf = scan.next();
        } while(!shelf.matches("[1-9]+[A-Ga-g]"));

        arrTitle.add(title);
        arrAuthor.add(author);
        arrPublisher.add(publisher);
        arrYear.add(yearString);
        arrISBN.add(isbnString);
        //new
        arrShelf.add(shelf.toUpperCase());
        //endnew

        String bookID = getAlphaNum();

        System.out.println("Book ID: " + bookID);

        arrBookID.add(bookID);

        System.out.println("Data has been successfully inserted!");
        System.out.print("Press enter to continue...");
        scan.nextLine();
        scan.nextLine();
    }

    public static void view(){
        clearScreen();

        if(arrTitle.isEmpty()){
            System.out.println("No Data Available!");
        }else{
            //%-36s --> %-30s at Title
            System.out.printf("%-3s | %-30s | %-31s | %-21s | %-5s | %-14s | %-3s | %-6s", "No", "Title", "Author", "Publisher", "Year", "ISBN", "Shelf Location", "ID");
            for(int i = 0; i < arrTitle.size(); i++){
                System.out.printf("\n%-3d | %-30s | %-31s | %-21s | %-5s | %-14s | %-3s | %-6s",(i+1), arrTitle.get(i), arrAuthor.get(i), arrPublisher.get(i), arrYear.get(i), arrISBN.get(i), arrShelf.get(i), arrBookID.get(i));
            }
        }
    }

    public static void searchGeneral(ArrayList<String> a, String search){
        boolean _isEmpty = true;

        clearScreen();
            System.out.println("Showing search result for keyword: " + search);
            //%-36s --> %-30s at Title
            System.out.printf("\n%-3s | %-30s | %-31s | %-21s | %-5s | %-14s | %-3s | %-6s", "No", "Title", "Author", "Publisher", "Year", "ISBN", "Shelf Location", "ID");
            for(int i = 0; i < arrTitle.size(); i++){
                for(int j = 0; j < a.get(i).length(); j++){
                    if(a.get(i).regionMatches(true, j, search, 0, search.length())){
                        System.out.printf("\n%-3d | %-30s | %-31s | %-21s | %-5s | %-14s | %-3s | %-6s",(i+1), arrTitle.get(i), arrAuthor.get(i), arrPublisher.get(i), arrYear.get(i), arrISBN.get(i), arrShelf.get(i), arrBookID.get(i));
                        _isEmpty = false;
                        break;
                    }
                }
            }

        if(_isEmpty){
            System.out.println("\nNo Data Found");
        }
        System.out.print("\nPress enter to continue...");
            scan.nextLine();
    }

    public static void search(){
        int choose = 0;
        long isbn = 0;
        String search = "";

        clearScreen();

        do{
            System.out.println("Search By ___");
            System.out.println("1. Title");
            System.out.println("2. Author");
            System.out.println("3. Publisher");
            System.out.println("4. ISBN");
            System.out.println("5. Shelf Location");
            System.out.println("6. Cancel Search");
            try{
                System.out.print("Choose: ");
                choose = scan.nextInt();
            }catch(Exception e){}
            scan.nextLine();

            switch(choose){
                case 1:
                    do{
                        System.out.print("Input Title [not more than 35 characters]: ");
                        search = scan.nextLine();
                    }while(search.length() > 35);

                    searchGeneral(arrTitle, search);
                    break;
                case 2:
                    do{
                        System.out.print("Input Author Name [not more than 30 characters]: ");
                        search = scan.nextLine();
                    }while((search.length() > 30));

                    searchGeneral(arrAuthor, search);
                    break;
                case 3:
                    do{
                        System.out.print("Input Publisher [not more than 20 characters]: ");
                        search = scan.nextLine();
                    }while(search.length() > 20);

                    searchGeneral(arrPublisher, search);
                    break;
                case 4:
                    do{
                        System.out.println("Input ISBN: ");
                        try{
                            isbn = scan.nextLong();
                        }catch(Exception e){}
                        scan.nextLine();
                        search = Long.toString(isbn);
                    }while(search.length() != 13);

                    searchGeneral(arrISBN, search);
                    break;
        case 5:
                    do{
                        System.out.print("Input Shelf Location: ");
                        search = scan.next();
                    } while(!search.matches("[1-9]+[A-Ga-g]"));
                    searchGeneral(arrShelf, search);
                    break;
            }break;
        }while(choose != 6);
    }
    //string c for shelf
    public static void SelectionSort(ArrayList<String> x, ArrayList<String> y, ArrayList<String> z, ArrayList<String> a, ArrayList<String> b, ArrayList<String> c){
        for (int i=0; i<x.size()-1; i++) {
            for (int j=i+1; j<x.size(); j++) {
                if (x.get(i).compareTo(x.get(j)) > 0) {
                    //... Exchange elements in first array
                    String temp = x.get(i);
                    x.set(i, x.get(j));
                    x.set(j, temp);

                    //... Exchange elements in second array
                    temp = y.get(i);
                    y.set(i, y.get(j));
                    y.set(j, temp);

                    //... Exchange elements in third array
                    temp = z.get(i);
                    z.set(i, z.get(j));
                    z.set(j, temp);

                    //... Exchange elements in forth array
                    temp = a.get(i);
                    a.set(i, a.get(j));
                    a.set(j, temp);

                    //... Exchange elements in fifth array
                    temp = b.get(i);
                    b.set(i, b.get(j));
                    b.set(j, temp);

                    // Exchange 6th element
                    temp = c.get(i);
                    c.set(i, c.get(j));
                    c.set(j, temp);
                }
            }
        }
    }

    public static void sort(){
        int choose = 0;

        clearScreen();

        do{
            System.out.println("Sort by ____");
            System.out.println("1. Title");
            System.out.println("2. Author");
            System.out.println("3. Publisher");
            System.out.println("4. Year Published");
            System.out.println("5. Cancel Sort");
            try{
                System.out.print("Choose: ");
                choose = scan.nextInt();
            }catch(Exception e){}
            scan.nextLine();

            switch(choose){
            case 1:
                SelectionSort(arrTitle, arrAuthor, arrPublisher, arrYear, arrISBN, arrShelf);
                view();
                break;
            case 2:
                SelectionSort(arrAuthor, arrTitle, arrPublisher, arrYear, arrISBN, arrShelf);
                view();
                break;
            case 3:
                SelectionSort(arrPublisher, arrAuthor, arrTitle, arrYear, arrISBN, arrShelf);
                view();
                break;
            case 4:
                SelectionSort(arrYear, arrAuthor, arrPublisher, arrTitle, arrISBN, arrShelf);
                view();
                break;
            }break;
        }while(choose != 5);

        System.out.print("\nPress enter to continue...");
        scan.nextLine();
    }

    public static void delete(){
        int index = 0;

        clearScreen();
        view();

        do{
            System.out.print("\n\nInput number to be deleted [1-" + arrTitle.size() + "][0 for Cancel]: ");
            try{
                index = scan.nextInt();
            }catch(Exception e){}
            scan.nextLine();

            if(index == 0)
                break;
            else{
                arrTitle.remove(index - 1);
                arrAuthor.remove(index - 1);
                arrPublisher.remove(index - 1);
                arrYear.remove(index - 1);
                arrISBN.remove(index - 1);
                arrShelf.remove(index - 1);

                System.out.println("Data has been successfully deleted!");
                System.out.print("Press enter continue...");
                scan.nextLine();
                break;
            }
        }while(index >= arrTitle.size());
    }

    public static void main(String[] args) {
        int choose = 0;

        do{
            clearScreen();

            System.out.println("=== Library Book Management ===");
            System.out.println("1. Insert New Book");
            System.out.println("2. View Book List");
            System.out.println("3. Search Book");
            System.out.println("4. Sort Book List");
            System.out.println("5. Delete a Book");
            System.out.println("6. Exit");
            try{
                System.out.print("Choose: ");
                choose = scan.nextInt();
            }catch(Exception e){}
            scan.nextLine();

            switch(choose){
                case 1:
                    insert();
                    break;
                case 2:
                    view();
                    System.out.print("\nPress enter continue...");
                    scan.nextLine();
                    break;
                case 3:
                    search();
                    break;
                case 4:
                    sort();
                    break;
                case 5:
                    delete();
                    break;
                case 6:
                    System.out.println("Thank you for using our app.");
                    break;
           }
        }while(choose != 6);
    }

}