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

namespace PersonalFinance.Entity
{
    public class Scheduler
    {
        ScheduledItemService schsrv;
        PaymentService paymentsrv;
        EntityContext ctx;

        private static int loop = 0;
        public Scheduler(EntityContext ctx){
            if (loop < 1)
            {
                paymentsrv = new PaymentService(ctx);
                schsrv = new ScheduledItemService(ctx);
                this.ctx = ctx;

                Daily();
                Weekly();
                Monthly();
                Quartely();
                Biannually();
                Yearly();
                loop++;
            }
        }

        private void Daily()
        {
            //podiva se na naposledy pouzite casy u ScheduleItem ktere maji nastaveno daily
            //a provede zapis techto plateb tolikrat kolikrat je potreba
            List<ScheduledPayment> schPayments = schsrv.GetAllScheduledItems()
                .FindAll(i => i.LastUse < DateTime.Now && i.Frequency == Frequency.Daily);
            if (schPayments.Count > 0)
            {
                ScheduledPayment[] s = schPayments.ToArray();
                for (int i = 0; i < schPayments.Count; i++)
                {
                    Payment p = s[i].ToPayment();
                    p.User = s[i].User;
                    paymentsrv.AddPayment(p);
                    s[i].LastUse = DateTime.Now;
                    ctx.SaveChanges();
                }
            }
        }

        private void Weekly()
        {
            List<ScheduledPayment> schPayments = schsrv.GetAllScheduledItems()
                .FindAll(i => i.LastUse.Day <= (DateTime.Now.Day - 7) && i.Frequency == Frequency.Weekly);
            if (schPayments.Count > 0)
            {
                ScheduledPayment[] s = schPayments.ToArray();
                for (int i = 0; i < schPayments.Count; i++)
                {
                    Payment p = s[i].ToPayment();
                    p.User = s[i].User;
                    paymentsrv.AddPayment(p);
                    s[i].LastUse = DateTime.Now;
                    ctx.SaveChanges();
                }
            }
        }

        private void Monthly()
        {
            List<ScheduledPayment> schPayments = schsrv.GetAllScheduledItems()
                .FindAll(i => i.LastUse.Month < (DateTime.Now.Month) && i.Frequency == Frequency.Monthly);
            if (schPayments.Count > 0)
            {
                ScheduledPayment[] s = schPayments.ToArray();
                for (int i = 0; i < schPayments.Count; i++ )
                {
                    Payment p = s[i].ToPayment();
                    p.User = s[i].User;
                    paymentsrv.AddPayment(p);
                    s[i].LastUse = DateTime.Now;
                    ctx.SaveChanges();
                }
            }
        }

        private void Quartely()
        {
            List<ScheduledPayment> schPayments = schsrv.GetAllScheduledItems()
                .FindAll(i => i.LastUse.Month < (DateTime.Now.Month - 3) && i.Frequency == Frequency.Quarterly);
            if (schPayments.Count > 0)
            {
                ScheduledPayment[] s = schPayments.ToArray();
                for (int i = 0; i < schPayments.Count; i++)
                {
                    Payment p = s[i].ToPayment();
                    p.User = s[i].User;
                    paymentsrv.AddPayment(p);
                    s[i].LastUse = DateTime.Now;
                    ctx.SaveChanges();
                }
            }
        }

        private void Biannually()
        {
            List<ScheduledPayment> schPayments = schsrv.GetAllScheduledItems()
               .FindAll(i => i.LastUse.Month < (DateTime.Now.Month - 6) && i.Frequency == Frequency.Biannually);
            if (schPayments.Count > 0)
            {
                ScheduledPayment[] s = schPayments.ToArray();
                for (int i = 0; i < schPayments.Count; i++)
                {
                    Payment p = s[i].ToPayment();
                    p.User = s[i].User;
                    paymentsrv.AddPayment(p);
                    s[i].LastUse = DateTime.Now;
                    ctx.SaveChanges();
                }
            }
        }

        private void Yearly()
        {
            List<ScheduledPayment> schPayments = schsrv.GetAllScheduledItems()
               .FindAll(i => i.LastUse.Year < DateTime.Now.Year && i.Frequency == Frequency.Yearly);
            if (schPayments.Count > 0)
            {
                ScheduledPayment[] s = schPayments.ToArray();
                for (int i = 0; i < schPayments.Count; i++)
                {
                    Payment p = s[i].ToPayment();
                    p.User = s[i].User;
                    paymentsrv.AddPayment(p);
                    s[i].LastUse = DateTime.Now;
                    ctx.SaveChanges();
                }
            }
        }
    }
}