using System;
using System.Collections.Generic;
using Server.Multis;

namespace Server.Mobiles
{
  public class VendorInventory
  {
    public static readonly TimeSpan GracePeriod = TimeSpan.FromDays(7.0);

    private Timer m_ExpireTimer;

    public VendorInventory(BaseHouse house, Mobile owner, string vendorName, string shopName)
    {
      House = house;
      Owner = owner;
      VendorName = vendorName;
      ShopName = shopName;

      Items = new List<Item>();

      ExpireTime = DateTime.UtcNow + GracePeriod;
      m_ExpireTimer = new ExpireTimer(this, GracePeriod);
      m_ExpireTimer.Start();
    }

    public VendorInventory(BaseHouse house, GenericReader reader)
    {
      House = house;

      int version = reader.ReadEncodedInt();

      Owner = reader.ReadMobile();
      VendorName = reader.ReadString();
      ShopName = reader.ReadString();

      Items = reader.ReadStrongItemList();
      Gold = reader.ReadInt();

      ExpireTime = reader.ReadDeltaTime();

      if (Items.Count == 0 && Gold == 0)
      {
        Timer.DelayCall(TimeSpan.Zero, Delete);
      }
      else
      {
        TimeSpan delay = ExpireTime - DateTime.UtcNow;
        m_ExpireTimer = new ExpireTimer(this, delay > TimeSpan.Zero ? delay : TimeSpan.Zero);
        m_ExpireTimer.Start();
      }
    }

    public BaseHouse House{ get; set; }

    public string VendorName{ get; set; }

    public string ShopName{ get; set; }

    public Mobile Owner{ get; set; }

    public List<Item> Items{ get; }

    public int Gold{ get; set; }

    public DateTime ExpireTime{ get; }

    public void AddItem(Item item)
    {
      item.Internalize();
      Items.Add(item);
    }

    public void Delete()
    {
      foreach (Item item in Items) item.Delete();

      Items.Clear();
      Gold = 0;

      House?.VendorInventories.Remove(this);

      m_ExpireTimer.Stop();
    }

    public void Serialize(GenericWriter writer)
    {
      writer.WriteEncodedInt(0); // version

      writer.Write(Owner);
      writer.Write(VendorName);
      writer.Write(ShopName);

      writer.Write(Items, true);
      writer.Write(Gold);

      writer.WriteDeltaTime(ExpireTime);
    }

    private class ExpireTimer : Timer
    {
      private VendorInventory m_Inventory;

      public ExpireTimer(VendorInventory inventory, TimeSpan delay) : base(delay)
      {
        m_Inventory = inventory;

        Priority = TimerPriority.OneMinute;
      }

      protected override void OnTick()
      {
        BaseHouse house = m_Inventory.House;

        if (house != null)
        {
          if (m_Inventory.Gold > 0)
          {
            if (house.MovingCrate == null)
              house.MovingCrate = new MovingCrate(house);

            Banker.Deposit(house.MovingCrate, m_Inventory.Gold);
          }

          foreach (Item item in m_Inventory.Items)
            if (!item.Deleted)
              house.DropToMovingCrate(item);

          m_Inventory.Gold = 0;
          m_Inventory.Items.Clear();
        }

        m_Inventory.Delete();
      }
    }
  }
}