using friaLabbar.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace friaLabbar
{
    public class RandomPersonGenerator
    {
        Random rnd = new Random();

        string[] streetAddresses = new string[] { "Stensvedsgatan 7", "Rydsvägen 332B", "Kläppen 12", "Barkaby 98", "Myrbacka 18" };
        string[] cities = new string[] { "Borlänge", "Linköping", "Leksand", "Dala-Järna", "Sälen", "Stockholm" };
        string[] states = new string[] { "Dalarna", "Östergötland", "Värmland", "Skåne", "Uppland" };
        string[] zipCodes = new string[] { "42314", "58330", "79330", "44231" };

        string[] firstNames = new string[] { "Sten", "Sture", "Bertil", "Greta", "Lisa", "Fia", "Sven" };
        string[] lastNames = new string[] { "Karlsson", "Svensson", "Rödluva", "Ekdal", "Melander" };
        bool[] aliveStatuses = new bool[] { true, false };
        DateTime lowEndDate = new DateTime(1943, 1, 1);
        int daysFromLowDate;

        public RandomPersonGenerator()
        {
            daysFromLowDate = (DateTime.Today - lowEndDate).Days;
        }

        public List<PersonModel> GetPeople(int total = 10)
        {
            List<PersonModel> result = new List<PersonModel>();

            for (int i = 0; i < total; i++)
            {
                result.Add(GetPerson(i + 1));
            }

            return result;
        }

        private PersonModel GetPerson(int id)
        {
            PersonModel result = new PersonModel();

            result.PersonId = id;
            result.FirstName = GetRandomItem(firstNames);
            result.LastName = GetRandomItem(lastNames);
            result.IsAlive = GetRandomItem(aliveStatuses);
            result.DateOfBirth = GetRandomDate();
            result.Age = GetAgeInYears(result.DateOfBirth);
            result.AccountBalance = ((decimal)rnd.Next(1, 1000000) / 100);

            int addressCount = rnd.Next(1, 5);

            for (int i = 0; i < addressCount; i++)
            {
                result.Addresses.Add(GetAddress(((id - 1) * 5) + i + 1));
            }


            return result;
        }

        private AddressModel GetAddress(int id)
        {
            AddressModel result = new AddressModel();

            result.AddressId = id;
            result.StreetAddress = GetRandomItem(streetAddresses);
            result.City = GetRandomItem(cities);
            result.State = GetRandomItem(states);
            result.ZipCode = GetRandomItem(zipCodes);

            return result;
        }

        private T GetRandomItem<T>(T[] obj)
        {
            return obj[rnd.Next(0, obj.Length)];
        }

        private DateTime GetRandomDate()
        {
            return lowEndDate.AddDays(rnd.Next(daysFromLowDate));
        }

        private int GetAgeInYears(DateTime birthday)
        {
            DateTime now = DateTime.Today;
            int age = now.Year - birthday.Year;
            if (now < birthday.AddYears(age))
            {
                age--;
            }
            return age;
        }
    }
}