using PersonalFinance;
using PersonalFinance.Entity;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;

namespace PersonalFinanceWindow.ViewModel
{
    class ScheduledViewModel : ViewModelBase
    {
        ScheduledItemService schsrv;

        BindingList<ScheduledPayment> scheduledItems;
        public BindingList<ScheduledPayment> ScheduledItems { get { return scheduledItems; } set { Set(ref scheduledItems, value); } }

        ScheduledPayment selected;
        public ScheduledPayment Selected { get { return selected; } set { Set(ref selected, value); } }

        public BindingList<Frequency> Frequencies { get; set; }

        public BindingList<PaymentGroup> Groups { get; set; }

        public BindingList<PaymentCurrency> Currencies { get; set; }

        public RelayCommand AddScheduled { get; set; }

        public RelayCommand DeleteScheduled { get; set; }

        public ScheduledViewModel()
        {
            AddScheduled = new RelayCommand(AddScheduledAction);
            DeleteScheduled = new RelayCommand(DeleteScheduledAction);
            schsrv = new ScheduledItemService(ctx);
            GetEnums();
            if ((bool)(DesignerProperties.IsInDesignModeProperty.GetMetadata(typeof(DependencyObject)).DefaultValue))
            {
                ScheduledItems = new BindingList<ScheduledPayment>(new List<ScheduledPayment> {
                    new ScheduledPayment() { ScheduledItemId= 1, Frequency = Frequency.Monthly, LastUse = DateTime.Now,
                        Currency = PaymentCurrency.CZK, Price = 1700, Purpose = "Elektřina", Group = PaymentGroup.Family, 
                        Until = DateTime.Now.AddDays(10), Note = "Poznámka" },
                    new ScheduledPayment() { ScheduledItemId= 2, Frequency = Frequency.Monthly, LastUse = DateTime.Now.AddDays(10),
                        Currency = PaymentCurrency.CZK, Price = 349, Purpose = "Telefon", Group = PaymentGroup.Personal },
                    new ScheduledPayment() { ScheduledItemId= 3, Frequency = Frequency.Quarterly, LastUse = DateTime.Now,
                        Currency = PaymentCurrency.CZK, Price = 599, Purpose = "Telefon", Group = PaymentGroup.Personal }
                });
            }
            else
            {
                //Database.SetInitializer<EntityContext>(new EntityContextInit());
                //ScheduledItemService schsrv = new ScheduledItemService(ctx);
                //List<ScheduledPayment> p = schsrv.GetAllScheduledItems().FindAll(i => i.User.UserId == UserViewModel.loggedUserId);
                //ScheduledItems = new BindingList<ScheduledPayment>(p);
                ScheduledItems = new BindingList<ScheduledPayment>();
            }
            if (ScheduledItems.Count > 0)
            {
                Selected = ScheduledItems[0];
            }
        }

        public void LoadScheduled()
        {
            //Database.SetInitializer<EntityContext>(new EntityContextInit());
            //ScheduledItemService schsrv = new ScheduledItemService(ctx);
            List<ScheduledPayment> p = schsrv.GetAllScheduledItems().FindAll(i => i.User.UserId == UserViewModel.loggedUserId);
            ScheduledItems = new BindingList<ScheduledPayment>(p);
            
            if (ScheduledItems.Count > 0)
            {
                Selected = ScheduledItems[0];
            }
        }

        private void GetEnums()
        {
            Frequencies = new BindingList<Frequency>(new List<Frequency>(){
                Frequency.Biannually, Frequency.Daily, Frequency.Monthly, Frequency.None,
                Frequency.Once, Frequency.Quarterly, Frequency.Weekly, Frequency.Yearly
            });

            Groups = new BindingList<PaymentGroup>(new List<PaymentGroup>()
            {
                PaymentGroup.Family, PaymentGroup.Personal, PaymentGroup.Private
            });

            Currencies = new BindingList<PaymentCurrency>(new List<PaymentCurrency>() { 
                PaymentCurrency.CZK, PaymentCurrency.EUR, PaymentCurrency.USD
            });
        }

        public void AddScheduledAction()
        {
            ScheduledPayment p = new ScheduledPayment()
            {
                ScheduledItemId = schsrv.GetAllScheduledItems().Max(i => i.ScheduledItemId) + 1,
                Price = 0,
                Purpose = "NEW SCHEDULED PAYMENT",
                Until = DateTime.Now.AddDays(365),
                Currency = PaymentCurrency.CZK,
                Group = PaymentGroup.Family,
                Frequency = PersonalFinance.Entity.Frequency.None,
                LastUse = DateTime.Now,
                User = UserViewModel.loggedUser
            };
            ScheduledItems.Add(p);
            schsrv.AddScheduledItem(p);
            Selected = p;
        }

        public void DeleteScheduledAction()
        {
            ScheduledPayment p = Selected as ScheduledPayment;
            ScheduledItems.Remove(p);
            schsrv.DeleteScheduledItem(p);
        }
    }
}