package de.tammo.util;

import de.tammo.model.details.Address;
import de.tammo.model.member.Student;

import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import java.util.UUID;

public class DataGenerator {

    private static List<String> names = new ArrayList<>();

    private static List<String> streets = new ArrayList<>();

    private static List<String> houseNumbers = new ArrayList<>();

    private static List<Integer> postCodes = new ArrayList<>();

    private static Random random = new Random();

    public static void init() {
        names.add("Tammo");
        names.add("Alex");
        names.add("Fahad");
        names.add("André");
        names.add("Julian");

        streets.add("Haupstraße");
        streets.add("Tannenweg");
        streets.add("Steinstraße");
        streets.add("Tischzulauf");
        streets.add("Mühlenstraße");

        houseNumbers.add("10");
        houseNumbers.add("13a");
        houseNumbers.add("3d");
        houseNumbers.add("199");
        houseNumbers.add("18");

        postCodes.add(12002);
        postCodes.add(2924);
        postCodes.add(92929);
        postCodes.add(329729);
    }

    public static Student generateStudent() {
        String name = names.get(random.nextInt(names.size()));
        return new Student(
                name,
                new Address(
                        streets.get(random.nextInt(streets.size())),
                        houseNumbers.get(random.nextInt(houseNumbers.size())),
                        postCodes.get(random.nextInt(postCodes.size())),
                        "Bremen",
                        "Germany"
                ),
                generatePhoneNumber(),
                name + "." + new StringBuilder(name).reverse().toString() + "@uni.de",
                generateMatrikelNumber(),
                random.nextInt(10000) + 1000
        );
    }

    private static String generatePhoneNumber() {
        StringBuilder number = new StringBuilder();

        for (int i = 0; i < 10; i++) {
            number.append(random.nextInt(9));
        }

        return number.toString();
    }

    private static String generateMatrikelNumber() {
        return UUID.randomUUID().toString().replace("-", "").substring(0, 7);
    }

}