import java.util.Arrays;
import java.util.Scanner;

public class Menue {

    // public static void printLeapyear(int year) {
    // for (int i = 0; i <= year; i++) {
    // System.out.println(i + ": " + isLeapyear(i));
    // }
    // }

    private static Calendar calendar = new Calendar();

    public static int[] parseInput() {// Hier wird das Datum eingelesen.

        while (true) {
            System.out.println("Bitte geben Sie das Datum ein (dd.mm.yyyy):");
            Scanner scan = new Scanner(System.in);
            String scanned = scan.nextLine();
            String[] splitted = scanned.split("\\.");
            System.out.println(Arrays.toString(splitted));
            if (splitted.length == 3) {
                try {
                    int day = Integer.parseInt(splitted[0]);
                    int month = Integer.parseInt(splitted[1]);
                    int year = Integer.parseInt(splitted[2]);

                    if (isValidDate(day, month, year)) {
                        int[] dateArray = { day, month, year };
                        return dateArray;
                    } else {
                        System.out.println("Ungültiges Datum");
                        System.out.println();
                    }
                } catch (NumberFormatException e) {
                    System.out
                            .println("Tut mir Leid, das war kein lesbares Datum");
                    System.out.println();
                }
            } else {
                System.out.println("Tut mir Leid, das war kein lesbares Datum");
                System.out.println();
            }
        }

    }

    private static String addDateName() {// Hier wird der Name des Termins
                                            // eingelesen
        System.out.println("Bitte Terminnamen eingeben:");
        Scanner scan = new Scanner(System.in);
        String name = scan.nextLine();

        if (name.isEmpty()) {
            return addDateName();
        } else {

            System.out.println(name);
            return name;
        }

    }

    private static int[] addDateTime() {// Hier wird die Zeit des Termins
                                        // eingelesen
        System.out.println("Bitte Uhrzeit eingeben(hh:mm):");
        Scanner scan = new Scanner(System.in);
        String scannedTime = scan.nextLine();
        String[] splitted = scannedTime.split("\\:");
        if (splitted.length == 2){
        try {
            int hours = Integer.parseInt(splitted[0]);
            int minutes = Integer.parseInt(splitted[1]);
            if (isValidTime(hours, minutes)) {
                System.out.println("Zeit: " + hours + ":" + minutes + " Uhr");
                int[] timeArray = { hours, minutes };
                return timeArray;
            } else {
                System.out.println("Fehler");
                return addDateTime();
            }

        } catch (NumberFormatException e) {
            System.out.println("Ungültige Zeitangabe!");
            return addDateTime();
        }
        }
        else {
            System.out.println("Ungültige Zeitangabe!");
            return addDateTime();
        }

    }

    private static String addDateDescription() {
        System.out.println("Bitte Beschreibung eingeben:");
        Scanner scan = new Scanner(System.in);
        String description = scan.nextLine();
        if (description.isEmpty()) {
            return addDateDescription();
        } else {
            System.out.println("Beschreibung: " + description);
            return description;
        }
    }

    public static boolean isValidTime(int hours, int minutes) {
        if ((hours < 24) && (hours >= 0) && (minutes < 60) && (minutes >= 0)) {
            return true;
        } else {
            return false;
        }
    }

    public static boolean isLeapyear(int year) {
        if ((year % 4) == 0) {
            if ((year % 100) == 0) {
                if ((year % 400) == 0) {
                    return true;
                } else {
                    return false;
                }
            } else {
                return true;
            }
        } else {
            return false;
        }
    }

    public static boolean isValidDate(int day, int month, int year) {

        if (month > 0 && month < 13) {
            switch (month) {
            case 1:
                return ((day <= 31) && (day > 0));

            case 2:
                if ((isLeapyear(year))) {
                    return ((day <= 29) && (day > 0));

                } else {
                    return ((day <= 28) && (day > 0));
                }
            case 3:
                return ((day <= 31) && (day > 0));

            case 4:
                return ((day <= 30) && (day > 0));

            case 5:
                return ((day <= 31) && (day > 0));

            case 6:
                return ((day <= 30) && (day > 0));

            case 7:
                return ((day <= 31) && (day > 0));

            case 8:
                return ((day <= 31) && (day > 0));

            case 9:
                return ((day <= 30) && (day > 0));

            case 10:
                return ((day <= 31) && (day > 0));

            case 11:
                return ((day <= 30) && (day > 0));

            case 12:
                return ((day <= 31) && (day > 0));

            default:
                return false;

            }
        } else {
            return false;
        }

    }

    public static void addDate() {
        Date date = new Date(parseInput(), addDateTime(), addDateName(),
                addDateDescription());
        calendar.addDate(date);

    }

    public void editDate() {
        calendar.printCalendar();
        System.out.println("Bitte geben Sie die Terminnummer des zu ändernden Termins ein!");
        Scanner scan = new Scanner(System.in);
        int scanned = scan.nextInt();

        if (scan.hasNextInt()) {
            Date date = calendar.getDate(scanned);
            scanNewDate();
            scanNewTime();
            scanNewName();
            scanNewDescription();
        } else {
            System.out.println("Bitte die Terminnummer eingeben!");
            editDate();
        }

    }

    public int[] scanNewDate() {
        System.out.println("Bitte geben Sie das neue Datum ein (dd.mm.yyyy):");
        Scanner scan = new Scanner(System.in);
        String scanned = scan.nextLine();
        String[] splitted = scanned.split("\\.");
        System.out.println(Arrays.toString(splitted));
        if (splitted.length == 3) {
            try {
                int newDay = Integer.parseInt(splitted[0]);
                int newMonth = Integer.parseInt(splitted[1]);
                int newYear = Integer.parseInt(splitted[2]);

                if (isValidDate(newDay, newMonth, newYear)) {
                    int[] newDateArray = { newDay, newMonth, newYear };
                    Date.setDay(newDay);
                } else {
                    System.out.println("Ungültiges Datum");
                    System.out.println();
                    return scanNewDate();
                }
            } catch (NumberFormatException e) {
                System.out.println("Tut mir Leid, das war kein lesbares Datum");
                System.out.println();
                return scanNewDate();
            }
        } else {
            System.out.println("Tut mir Leid, das war kein lesbares Datum");
            System.out.println();
            return scanNewDate();
        }
    }

    private static String scanNewName() {// Hier wird der neue Name des Termins
                                            // eingelesen
        System.out.println("Bitte neuen Terminnamen eingeben:");
        Scanner scan = new Scanner(System.in);
        String newName = scan.nextLine();

        if (newName.length() > 0) {
            System.out.println(newName);
            return newName;
        } else {
            return scanNewName();
        }

    }

    private static int[] scanNewTime() {// Hier wird die neue Zeit des Termins
                                        // eingelesen
        System.out.println("Bitte Uhrzeit eingeben(hh:mm):");
        Scanner scan = new Scanner(System.in);
        String scannedTime = scan.nextLine();
        String[] splitted = scannedTime.split("\\:");
        if (splitted.length == 2){
        try {
            int newHours = Integer.parseInt(splitted[0]);
            int newMinutes = Integer.parseInt(splitted[1]);
            if (isValidTime(newHours, newMinutes)) {
                System.out.println("Zeit: " + newHours + ":" + newMinutes + " Uhr");
                int[] timeArray = { newHours, newMinutes };
                return timeArray;
            } else {
                System.out.println("Fehler");
                return addDateTime();
            }

        } catch (NumberFormatException e) {
            System.out.println("Ungültige Zeitangabe!");
            return addDateTime();
        }
        }
        else {
            System.out.println("Ungültige Zeitangabe!");
            return addDateTime();
        }

    }

    private static String scanNewDescription() {
        System.out.println("Bitte Beschreibung eingeben:");
        Scanner scan = new Scanner(System.in);
        String newDescription = scan.nextLine();
        if (newDescription.isEmpty()) {
            return scanNewDescription();
        } else {
            System.out.println("Beschreibung: " + newDescription);
            return newDescription;
        }
    }

    public static void main(String[] args) {

        for (int i = 1; i < 8; i++) {
            int[] dateArray = { 12, 1, 2012 };
            int[] timeArray = { 8, 00 };
            String name = "Besprechung " + i;
            String description = "Treffen mit Senfgesicht Nummer " + i;
            Date date = new Date(dateArray, timeArray, name, description);
            calendar.addDate(date);

        }

        boolean running = true;
        while (running) {

            System.out.println("Was möchten Sie machen?");
            System.out.println();
            System.out.println("1. Termine anzeigen");
            System.out.println("2. Termin hinzufügen");
            System.out.println("3. Termine ändern");
            System.out.println("4. Programm beenden");
            Scanner scan = new Scanner(System.in);
            String scanned = scan.nextLine();
            int scannedInt = 0;
            try {
                scannedInt = Integer.parseInt(scanned);
            } catch (NumberFormatException e) {
                System.out.println("Bitte eine Zahl eingeben!");
                System.out.println();
            }

            switch (scannedInt) {
            case 1:
                calendar.printCalendar();
                System.out.println();
                break;
            case 2:
                addDate();
                break;
            case 3:
                System.out.println("Punkt 3");
                System.out.println();

                break;
            case 4:
                System.out.println("Programm beendet");
                running = false;
                break;

            default:
                System.out
                        .println("Bitte einen der oben genannten Menüpunkte eingeben!");
                System.out.println();
                break;

            }
        }
    }
}