using System;
using Server.Items;
using Server.Multis;
using Server.Network;
using Server.Targeting;

namespace Server.Mobiles
{
  public abstract class BaseMount : BaseCreature, IMount
  {
    private Mobile m_Rider;

    public BaseMount(string name, int bodyID, int itemID, AIType aiType, FightMode fightMode, int rangePerception,
      int rangeFight, double activeSpeed, double passiveSpeed) : base(aiType, fightMode, rangePerception, rangeFight,
      activeSpeed, passiveSpeed)
    {
      Name = name;
      Body = bodyID;

      InternalItem = new MountItem(this, itemID);
    }

    public BaseMount(Serial serial)
      : base(serial)
    {
    }

    public virtual TimeSpan MountAbilityDelay => TimeSpan.Zero;

    [CommandProperty(AccessLevel.GameMaster)]
    public DateTime NextMountAbility{ get; set; }

    protected Item InternalItem{ get; private set; }

    public virtual bool AllowMaleRider => true;
    public virtual bool AllowFemaleRider => true;

    [Hue]
    [CommandProperty(AccessLevel.GameMaster)]
    public override int Hue
    {
      get => base.Hue;
      set
      {
        base.Hue = value;

        if (InternalItem != null)
          InternalItem.Hue = value;
      }
    }

    [CommandProperty(AccessLevel.GameMaster)]
    public int ItemID
    {
      get => InternalItem?.ItemID ?? 0;
      set
      {
        if (InternalItem != null)
          InternalItem.ItemID = value;
      }
    }

    [CommandProperty(AccessLevel.GameMaster)]
    public Mobile Rider
    {
      get => m_Rider;
      set
      {
        if (m_Rider != value)
        {
          if (value == null)
          {
            Point3D loc = m_Rider.Location;
            Map map = m_Rider.Map;

            if (map == null || map == Map.Internal)
            {
              loc = m_Rider.LogoutLocation;
              map = m_Rider.LogoutMap;
            }

            Direction = m_Rider.Direction;
            Location = loc;
            Map = map;

            InternalItem?.Internalize();
          }
          else
          {
            if (m_Rider != null) Dismount(m_Rider);

            Dismount(value);

            if (InternalItem != null)
              value.AddItem(InternalItem);

            value.Direction = Direction;

            Internalize();

            if (value.Target is Bola.BolaTarget) Target.Cancel(value);
          }

          m_Rider = value;
        }
      }
    }

    public virtual void OnRiderDamaged(int amount, Mobile from, bool willKill)
    {
      if (m_Rider == null)
        return;

      Mobile attacker = from ?? m_Rider.FindMostRecentDamager(true);

      if (!(attacker == this || attacker == m_Rider || willKill || DateTime.UtcNow < NextMountAbility)
          && DoMountAbility(amount, from))
          NextMountAbility = DateTime.UtcNow + MountAbilityDelay;
    }

    public override bool OnBeforeDeath()
    {
      Rider = null;
      return base.OnBeforeDeath();
    }

    public override void OnAfterDelete()
    {
      InternalItem?.Delete();
      InternalItem = null;

      base.OnAfterDelete();
    }

    public override void OnDelete()
    {
      Rider = null;

      base.OnDelete();
    }

    public override void Serialize(GenericWriter writer)
    {
      base.Serialize(writer);

      writer.Write(1); // version

      writer.Write(NextMountAbility);

      writer.Write(m_Rider);
      writer.Write(InternalItem);
    }

    public override void Deserialize(GenericReader reader)
    {
      base.Deserialize(reader);

      int version = reader.ReadInt();

      switch (version)
      {
        case 1:
        {
          NextMountAbility = reader.ReadDateTime();
          goto case 0;
        }
        case 0:
        {
          m_Rider = reader.ReadMobile();
          InternalItem = reader.ReadItem();

          if (InternalItem == null)
            Delete();

          break;
        }
      }
    }

    public virtual void OnDisallowedRider(Mobile m)
    {
      m.SendMessage("You may not ride this creature.");
    }

    public override void OnDoubleClick(Mobile from)
    {
      if (IsDeadPet)
        return;

      if (from.IsBodyMod && !from.Body.IsHuman)
      {
        if (Core.AOS) // You cannot ride a mount in your current form.
          PrivateOverheadMessage(MessageType.Regular, 0x3B2, 1062061, from.NetState);
        else
          from.SendLocalizedMessage(1061628); // You can't do that while polymorphed.

        return;
      }

      if (!CheckMountAllowed(from))
        return;

      if (from.Mounted)
      {
        from.SendLocalizedMessage(1005583); // Please dismount first.
        return;
      }

      if (from.Female ? !AllowFemaleRider : !AllowMaleRider)
      {
        OnDisallowedRider(from);
        return;
      }

      if (!DesignContext.Check(from))
        return;

      if (from.HasTrade)
      {
        from.SendLocalizedMessage(1042317, "", 0x41); // You may not ride at this time
        return;
      }

      if (from.InRange(this, 1))
      {
        bool canAccess = from.AccessLevel >= AccessLevel.GameMaster
                         || Controlled && ControlMaster == from
                         || Summoned && SummonMaster == from;

        if (canAccess)
        {
          if (Poisoned)
            PrivateOverheadMessage(MessageType.Regular, 0x3B2, 1049692,
              from.NetState); // This mount is too ill to ride.
          else
            Rider = from;
        }
        else if (!Controlled && !Summoned)
        {
          // That mount does not look broken! You would have to tame it to ride it.
          PrivateOverheadMessage(MessageType.Regular, 0x3B2, 501263, from.NetState);
        }
        else
        {
          // This isn't your mount; it refuses to let you ride.
          PrivateOverheadMessage(MessageType.Regular, 0x3B2, 501264, from.NetState);
        }
      }
      else
      {
        from.SendLocalizedMessage(500206); // That is too far away to ride.
      }
    }

    public static void Dismount(Mobile m)
    {
      IMount mount = m.Mount;

      if (mount != null)
        mount.Rider = null;
    }

    // 1040024 You are still too dazed from being knocked off your mount to ride!
    // 1062910 You cannot mount while recovering from a bola throw.
    // 1070859 You cannot mount while recovering from a dismount special maneuver.

    public static bool CheckMountAllowed(Mobile mob)
    {
      bool result = true;

      if (mob is PlayerMobile mobile && mobile.MountBlockReason != BlockMountType.None)
      {
        mobile.SendLocalizedMessage((int)mobile.MountBlockReason);
        result = false;
      }

      return result;
    }

    public virtual bool DoMountAbility(int damage, Mobile attacker)
    {
      return false;
    }
  }

  public class MountItem : Item, IMountItem
  {
    private BaseMount m_Mount;

    public MountItem(BaseMount mount, int itemID) : base(itemID)
    {
      Layer = Layer.Mount;
      Movable = false;

      m_Mount = mount;
    }

    public MountItem(Serial serial) : base(serial)
    {
    }

    public override double DefaultWeight => 0;

    public IMount Mount => m_Mount;

    public override void OnAfterDelete()
    {
      m_Mount?.Delete();
      m_Mount = null;

      base.OnAfterDelete();
    }

    public override DeathMoveResult OnParentDeath(Mobile parent)
    {
      if (m_Mount != null)
        m_Mount.Rider = null;

      return DeathMoveResult.RemainEquipped;
    }

    public override void Serialize(GenericWriter writer)
    {
      base.Serialize(writer);

      writer.Write(0); // version

      writer.Write(m_Mount);
    }

    public override void Deserialize(GenericReader reader)
    {
      base.Deserialize(reader);

      int version = reader.ReadInt();

      switch (version)
      {
        case 0:
        {
          m_Mount = reader.ReadMobile() as BaseMount;

          if (m_Mount == null)
            Delete();

          break;
        }
      }
    }
  }
}