using System;
using Server.Gumps;
using Server.Mobiles;

namespace Server.Engines.MLQuests.Objectives
{
  public class KillObjective : BaseObjective
  {

    public KillObjective(
      int amount = 0, Type[] types = null, TextDefinition name = null, QuestArea area = null)
    {
      DesiredAmount = amount;
      AcceptedTypes = types;
      Name = name;
      Area = area;
    }

    public int DesiredAmount{ get; set; }

    public Type[] AcceptedTypes{ get; set; }

    public TextDefinition Name{ get; set; }

    public QuestArea Area{ get; set; }

    public override void WriteToGump(Gump g, ref int y)
    {
      string amount = DesiredAmount.ToString();

      g.AddHtmlLocalized(98, y, 312, 16, 1072204, 0x15F90); // Slay
      g.AddLabel(133, y, 0x481, amount);

      if (Name.Number > 0)
        g.AddHtmlLocalized(133 + amount.Length * 15, y, 190, 18, Name.Number, 0x77BF);
      else if (Name.String != null)
        g.AddLabel(133 + amount.Length * 15, y, 0x481, Name.String);

      y += 16;

      #region Location

      if (Area != null)
      {
        g.AddHtmlLocalized(103, y, 312, 20, 1018327, 0x15F90); // Location

        if (Area.Name.Number > 0)
          g.AddHtmlLocalized(223, y, 312, 20, Area.Name.Number, 0xFFFFFF);
        else if (Area.Name.String != null)
          g.AddLabel(223, y, 0x481, Area.Name.String);

        y += 16;
      }

      #endregion
    }

    public override BaseObjectiveInstance CreateInstance(MLQuestInstance instance)
    {
      return new KillObjectiveInstance(this, instance);
    }
  }

  #region Timed

  public class TimedKillObjective : KillObjective
  {
    public TimedKillObjective(TimeSpan duration, int amount, Type[] types, TextDefinition name, QuestArea area = null)
      : base(amount, types, name, area)
    {
      Duration = duration;
    }

    public override bool IsTimed => true;
    public override TimeSpan Duration{ get; }
  }

  #endregion

  public class KillObjectiveInstance : BaseObjectiveInstance
  {
    public KillObjectiveInstance(KillObjective objective, MLQuestInstance instance)
      : base(instance, objective)
    {
      Objective = objective;
      Slain = 0;
    }

    public KillObjective Objective{ get; set; }

    public int Slain{ get; set; }

    public override DataType ExtraDataType => DataType.KillObjective;

    public bool AddKill(Mobile mob, Type type)
    {
      int desired = Objective.DesiredAmount;

      foreach (Type acceptedType in Objective.AcceptedTypes)
        if (acceptedType.IsAssignableFrom(type))
        {
          if (Objective.Area?.Contains(mob) == false)
            return false;

          PlayerMobile pm = Instance.Player;

          if (++Slain >= desired)
            pm.SendLocalizedMessage(1075050); // You have killed all the required quest creatures of this type.
          else
            pm.SendLocalizedMessage(1075051,
              (desired - Slain).ToString()); // You have killed a quest creature. ~1_val~ more left.

          return true;
        }

      return false;
    }

    public override bool IsCompleted()
    {
      return Slain >= Objective.DesiredAmount;
    }

    public override void WriteToGump(Gump g, ref int y)
    {
      Objective.WriteToGump(g, ref y);

      base.WriteToGump(g, ref y);

      g.AddHtmlLocalized(103, y, 120, 16, 3000087, 0x15F90); // Total
      g.AddLabel(223, y, 0x481, Slain.ToString());
      y += 16;

      g.AddHtmlLocalized(103, y, 120, 16, 1074782, 0x15F90); // Return to
      g.AddLabel(223, y, 0x481, QuesterNameAttribute.GetQuesterNameFor(Instance.QuesterType));
      y += 16;
    }

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

      writer.Write(Slain);
    }
  }
}