using System.Collections;
using Server.Items;
using Server.Misc;
using CPA = Server.CommandPropertyAttribute;

namespace Server.Mobiles
{
    public class XmlSpawnerSkillCheck
    {
        // alternate skillcheck hooks to replace those in SkillCheck.cs
        public static bool Mobile_SkillCheckLocation( Mobile from, SkillName skillName, double minSkill, double maxSkill )
		{
			Skill skill = from.Skills[skillName];

			if ( skill == null )
				return false;

			// call the default skillcheck handler
            bool success = SkillCheck.Mobile_SkillCheckLocation(  from,  skillName,  minSkill,  maxSkill );

            // call the xmlspawner skillcheck handler
			CheckSkillUse(from, skill, success);

			return success;
		}

		public static bool Mobile_SkillCheckDirectLocation( Mobile from, SkillName skillName, double chance )
		{
			Skill skill = from.Skills[skillName];

			if ( skill == null )
				return false;

            // call the default skillcheck handler
            bool success = SkillCheck.Mobile_SkillCheckDirectLocation(  from,  skillName,  chance );
            
            // call the xmlspawner skillcheck handler
			CheckSkillUse(from, skill, success);

			return success;
		}
		
		public static bool Mobile_SkillCheckTarget( Mobile from, SkillName skillName, object target, double minSkill, double maxSkill )
		{
			Skill skill = from.Skills[skillName];

			if ( skill == null )
				return false;

            // call the default skillcheck handler
            bool success = SkillCheck.Mobile_SkillCheckTarget(  from,  skillName,  target,  minSkill,  maxSkill );

            // call the xmlspawner skillcheck handler
			CheckSkillUse(from, skill, success);

			return success;
		}

		public static bool Mobile_SkillCheckDirectTarget( Mobile from, SkillName skillName, object target, double chance )
		{
			Skill skill = from.Skills[skillName];

			if ( skill == null )
				return false;

            // call the default skillcheck handler
            bool success = SkillCheck.Mobile_SkillCheckDirectTarget(  from,  skillName,  target,  chance );
            
            // call the xmlspawner skillcheck handler
            CheckSkillUse(from, skill, success);

			return success;
		}


		public class RegisteredSkill
        {
            public const int MaxSkills = 52;
            public const SkillName Invalid = (SkillName)(-1);
            
            public object  target;
            public SkillName   sid;

            // note the extra skill MaxSkills +1 is used for any unknown skill that falls outside of the known 52
            private static readonly ArrayList[] m_FeluccaSkillList = new ArrayList[MaxSkills+1];
            private static readonly ArrayList[] m_TrammelSkillList = new ArrayList[MaxSkills+1];
            private static readonly ArrayList[] m_MalasSkillList = new ArrayList[MaxSkills+1];
            private static readonly ArrayList[] m_IlshenarSkillList = new ArrayList[MaxSkills+1];
            private static readonly ArrayList[] m_TokunoSkillList = new ArrayList[MaxSkills+1];

            // primary function that returns the list of objects (spawners) that are associated with a given skillname by map
            public static ArrayList TriggerList(SkillName index, Map map)
            {
                if(map == null || map == Map.Internal) return null;

                ArrayList[] maplist;

                // get the list for the specified map

                if(map == Map.Felucca)
                    maplist = m_FeluccaSkillList;
                else
                if(map == Map.Ilshenar)
                    maplist = m_IlshenarSkillList;
                else
                if(map == Map.Malas)
                    maplist = m_MalasSkillList;
                else
                if(map == Map.Trammel)
                    maplist = m_TrammelSkillList;
                else
                if(map == Map.Tokuno)
                    maplist = m_TokunoSkillList;
                else
                    return null;

                // is it one of the standard 52 skills
                if((int)index >= 0 && (int)index < MaxSkills)
                {
                    if(maplist[(int)index] == null)
                        maplist[(int)index] = new ArrayList();

                    return maplist[(int)index];
                }
                else
                // otherwise pull it out of the final slot for unknown skills.  I dont know of a condition that would lead to 
                // additional skills being registered but it will support them if they are
                {
                    if(maplist[MaxSkills] == null)
                        maplist[MaxSkills] = new ArrayList();

                    return maplist[MaxSkills];
                }
    
            }
        }

        public static void RegisterSkillTrigger( object o, SkillName s, Map map)
        {
            if(o == null || s == RegisteredSkill.Invalid) return;

            // go through the list and if the spawner is not on it yet, then add it
            bool found = false;
            
            ArrayList skilllist = RegisteredSkill.TriggerList(s, map);

            if(skilllist == null) return;

            foreach(RegisteredSkill rs in skilllist)
            {
                if(rs.target == o && rs.sid == s)
                {
                    found = true;
                    // dont register a skill if it is already on the list for this spawner
                    break;
                }
            }

            // if it hasnt already been added to the list, then add it
            if(!found)
            {
                RegisteredSkill newrs = new RegisteredSkill();
                newrs.target = o;
                newrs.sid = s;

                skilllist.Add(newrs);

            }
        }
        
        public static void UnRegisterSkillTrigger( object o, SkillName s, Map map, bool all)
        {
            if(o == null || s == RegisteredSkill.Invalid) return;

            // go through the list and if the spawner is on it regardless of the skill registered, then remove it
            if(all)
            {
                for(int i = 0;i<RegisteredSkill.MaxSkills+1;i++)
                {
                    ArrayList skilllist = RegisteredSkill.TriggerList((SkillName)i, map);
            
                    if(skilllist == null) return;

                    foreach(RegisteredSkill rs in skilllist)
                    {
                        if(rs.target == o)
                        {
                            skilllist.Remove(rs);
                            break;
                        }
        
                    }
                }
            } else
            {
                ArrayList skilllist = RegisteredSkill.TriggerList(s, map);
            
                if(skilllist == null) return;

                // if the all flag is not set then just remove the spawner from the list for the specified skill
                foreach(RegisteredSkill rs in skilllist)
                {
                    if((rs.target == o) && (rs.sid == s))
                    {
                        skilllist.Remove(rs);
                        break;
                    }
    
                }
            }
        }

        // determines whether  XmlSpawner, XmlAttachment, or XmlQuest OnSkillUse methods should be invoked.
        public static void CheckSkillUse( Mobile m, Skill skill, bool success)
        {
            if(!(m is PlayerMobile) || skill == null) return;
            
            /*
            // first check for any attachments that might support OnSkillUse
            ArrayList list = XmlAttach.FindAttachments(m);
            if(list != null && list.Count > 0)
            {
                foreach(XmlAttachment a in list)
                {
                    if(a != null && !a.Deleted && a.HandlesOnSkillUse)
                    {
                        a.OnSkillUse(m, skill, success);
                    }
                }
            }
            */

            // then check for registered skills
            ArrayList skilllist = RegisteredSkill.TriggerList(skill.SkillName, m.Map);

            if(skilllist == null) return;

            // determine whether there are any registered objects for this skill
            foreach(RegisteredSkill rs in skilllist)
            {
                if(rs.sid == skill.SkillName)
                {
                    // if so then invoke their skill handlers
                    if(rs.target is XmlSpawner)
                    {
                        XmlSpawner spawner = (XmlSpawner)rs.target;
    
                        if ( spawner.HandlesOnSkillUse )
                        {
                            // call the spawner handler
        					spawner.OnSkillUse(m, skill, success);
        				}
    				} else
    				if(rs.target is IXmlQuest)
                    {
                        IXmlQuest quest = (IXmlQuest)rs.target;
                        if ( quest.HandlesOnSkillUse )
                        {
                           // call the xmlquest handler
        					quest.OnSkillUse(m, skill, success);
        				}
                    }
				}
            }
        }

    }
}
