using Server.Mobiles;
using Server.Network;
using Server.Spells;

using System.Collections.Generic;
using System.Linq;

namespace Server.Items
{
    public interface IDamageableItem : IDamageable
    {
        bool CanDamage { get; }
        bool CheckHit(Mobile attacker);
        void OnHarmfulSpell(Mobile attacker);
    }

    public class DamageableItem : Item, IDamageableItem
    {
        public enum ItemLevel
        {
            NotSet,
            VeryEasy,
            Easy,
            Average,
            Hard,
            VeryHard,
            Insane
        }

        private int m_Hits;
        private int m_HitsMax;
        private int m_StartID;
        private int m_DestroyedID;
        private int m_HalfHitsID;
        private ItemLevel m_ItemLevel;

        [CommandProperty(AccessLevel.GameMaster)]
        public ItemLevel Level
        {
            get
            {
                return m_ItemLevel;
            }
            set
            {
                m_ItemLevel = value;

                double bonus = ((int)m_ItemLevel * 100.0) * ((int)m_ItemLevel * 5);

                HitsMax = ((int)(100 + bonus));
                Hits = ((int)(100 + bonus));
            }
        }

        [CommandProperty(AccessLevel.GameMaster)]
        public int IDStart
        {
            get
            {
                return m_StartID;
            }
            set
            {
                if (value < 0)
                    m_StartID = 0;
                else if (value > int.MaxValue)
                    m_StartID = int.MaxValue;
                else
                    m_StartID = value;

                if (m_Hits >= (m_HitsMax * IDChange))
                {
                    if (ItemID != m_StartID)
                        ItemID = m_StartID;
                }
            }
        }

        [CommandProperty(AccessLevel.GameMaster)]
        public int IDHalfHits
        {
            get
            {
                return m_HalfHitsID;
            }
            set
            {
                if (value < 0)
                    m_HalfHitsID = 0;
                else if (value > int.MaxValue)
                    m_HalfHitsID = int.MaxValue;
                else
                    m_HalfHitsID = value;

                if (m_Hits < (m_HitsMax * IDChange))
                {
                    if (ItemID != m_HalfHitsID)
                        ItemID = m_HalfHitsID;
                }
            }
        }

        [CommandProperty(AccessLevel.GameMaster)]
        public int IDDestroyed
        {
            get
            {
                return m_DestroyedID;
            }
            set
            {
                if (value < 0 || value > int.MaxValue)
                    m_DestroyedID = -1;
                else
                    m_DestroyedID = value;
            }
        }

        [CommandProperty(AccessLevel.GameMaster)]
        public int Hits
        {
            get
            {
                return m_Hits;
            }
            set
            {
                if (value > HitsMax)
                {
                    value = HitsMax;
                }

                if (m_Hits != value)
                {
                    int oldValue = m_Hits;
                    m_Hits = value;
                    UpdateDelta();
                    OnHitsChange(oldValue);
                }

                int id = ItemID;

                if (m_Hits >= (m_HitsMax * IDChange) && id != m_StartID)
                {
                    ItemID = m_StartID;
                    OnIDChange(id);
                }
                else if (m_Hits <= (m_HitsMax * IDChange) && id == m_StartID)
                {
                    ItemID = m_HalfHitsID;
                    OnIDChange(id);
                }

                if (m_Hits < 0)
                {
                    Destroy();
                    return;
                }
            }
        }

        [CommandProperty(AccessLevel.GameMaster)]
        public int HitsMax
        {
            get
            {
                return m_HitsMax;
            }
            set
            {
                if (value > int.MaxValue)
                    m_HitsMax = int.MaxValue;
                else
                    m_HitsMax = value;

                if (Hits > m_HitsMax)
                    Hits = m_HitsMax;
            }
        }

        [CommandProperty(AccessLevel.GameMaster)]
        public bool Destroyed { get; set; }

        [CommandProperty(AccessLevel.GameMaster)]
        public int ResistBasePhys { get; set; }

        [CommandProperty(AccessLevel.GameMaster)]
        public int ResistBaseFire { get; set; }

        [CommandProperty(AccessLevel.GameMaster)]
        public int ResistBaseCold { get; set; }

        [CommandProperty(AccessLevel.GameMaster)]
        public int ResistBasePoison { get; set; }

        [CommandProperty(AccessLevel.GameMaster)]
        public int ResistBaseEnergy { get; set; }

        public Dictionary<Mobile, int> DamageStore { get; set; }

        public virtual int HitEffect => -1;
        public virtual int DestroySound => 0x3B3;
        public virtual double IDChange => 0.5;
        public virtual bool DeleteOnDestroy => true;
        public virtual bool Alive => !Destroyed;
        public virtual bool CanDamage => true;

        public override int PhysicalResistance => ResistBasePhys;
        public override int FireResistance => ResistBaseFire;
        public override int ColdResistance => ResistBaseCold;
        public override int PoisonResistance => ResistBasePoison;
        public override int EnergyResistance => ResistBaseEnergy;

        public override bool ForceShowProperties => false;

        [Constructable]
        public DamageableItem(int startID)
            : this(startID, startID, -1)
        {
        }

        [Constructable]
        public DamageableItem(int startID, int halfID)
            : this(startID, halfID, -1)
        {
        }

        [Constructable]
        public DamageableItem(int startID, int halfID, int destroyID = -1)
            : base(startID)
        {
            Hue = 0;
            Movable = false;

            Level = ItemLevel.NotSet;

            IDStart = startID;
            IDHalfHits = halfID;
            IDDestroyed = destroyID;
        }

        public override void OnDoubleClick(Mobile m)
        {
            if (m.Warmode)
                m.Attack(this);
        }

        public virtual bool CheckHit(Mobile attacker)
        {
            return true; // Always hits
        }

        public virtual void OnHarmfulSpell(Mobile attacker)
        {
        }

        public virtual bool CheckReflect(Spell spell, IDamageable caster)
        {
            return false;
        }

        public override void OnStatsQuery(Mobile from)
        {
            if (from.Map == Map && Utility.InUpdateRange(from, this) && from.CanSee(this))
            {
                from.Send(new MobileStatusCompact(false, this));
            }
        }

        public virtual void UpdateDelta()
        {
            IPooledEnumerable<NetState> eable = Map.GetClientsInRange(Location);
            Mobile beholder = null;

            Packet status = Packet.Acquire(new MobileHitsN(this));

            foreach (NetState ns in eable)
            {
                beholder = ns.Mobile;

                if (beholder != null && beholder.CanSee(this))
                {
                    ns.Send(status);
                }
            }

            Packet.Release(status);
            eable.Free();
        }

        public virtual void OnHitsChange(int oldhits)
        {
        }

        public virtual bool OnBeforeDestroyed()
        {
            return true;
        }

        public virtual void OnAfterDestroyed()
        {
        }

        public virtual int Damage(int amount, Mobile from)
        {
            if (!CanDamage && from.Combatant == this)
            {
                from.Combatant = null;
                return 0;
            }

            Hits -= amount;

            if (amount > 0)
                RegisterDamage(from, amount);

            if (HitEffect > 0)
                Effects.SendLocationEffect(Location, Map, HitEffect, 10, 5);

            SendDamagePacket(from, amount);

            OnDamage(amount, from, Hits < 0);

            return amount;
        }

        public virtual void SendDamagePacket(Mobile from, int amount)
        {
            NetState theirState = (from == null ? null : from.NetState);

            if (theirState == null && from != null)
            {
                Mobile master = from.GetDamageMaster(null);

                if (master != null)
                {
                    theirState = master.NetState;
                }
            }

            if (amount > 0 && theirState != null)
            {
                theirState.Send(new DamagePacket(this, amount));
            }
        }

        public void RegisterDamage(Mobile m, int damage)
        {
            if (m == null)
                return;

            if (DamageStore == null)
                DamageStore = new Dictionary<Mobile, int>();

            if (m is BaseCreature && ((BaseCreature)m).GetMaster() is PlayerMobile)
                m = ((BaseCreature)m).GetMaster();

            if (!DamageStore.ContainsKey(m))
                DamageStore[m] = 0;

            DamageStore[m] += damage;
        }

        public List<Mobile> GetLootingRights()
        {
            if (DamageStore == null)
                return null;

            return DamageStore.Keys.Where(m => DamageStore[m] > 0 && DamageStore[m] >= HitsMax / 16).ToList();
        }

        public virtual void OnDamage(int amount, Mobile from, bool willkill)
        {
        }

        public bool Destroy()
        {
            if (this == null || Deleted || Destroyed)
                return false;

            Effects.PlaySound(Location, Map, DestroySound);

            if (OnBeforeDestroyed())
            {
                if (DeleteOnDestroy)
                {
                    Delete();
                }
                else if (m_DestroyedID >= 0)
                {
                    ItemID = m_DestroyedID;

                    if (Spawner != null)
                        Spawner.Remove(this);
                }

                Destroyed = true;
                OnAfterDestroyed();

                return true;
            }

            return false;
        }

        public override void OnAfterDelete()
        {
            base.OnAfterDelete();

            if (DamageStore != null)
                DamageStore.Clear();
        }

        public virtual void OnIDChange(int oldID)
        {
        }

        #region Effects/Sounds & Particles
        public void PlaySound(int soundID)
        {
            if (soundID == -1)
            {
                return;
            }

            if (Map != null)
            {
                Packet p = Packet.Acquire(new PlaySound(soundID, this));

                IPooledEnumerable<NetState> eable = Map.GetClientsInRange(Location);

                foreach (NetState state in eable)
                {
                    if (state.Mobile.CanSee(this))
                    {
                        state.Send(p);
                    }
                }

                Packet.Release(p);

                eable.Free();
            }
        }

        public void MovingEffect(
            IEntity to, int itemID, int speed, int duration, bool fixedDirection, bool explodes, int hue, int renderMode)
        {
            Effects.SendMovingEffect(this, to, itemID, speed, duration, fixedDirection, explodes, hue, renderMode);
        }

        public void MovingEffect(IEntity to, int itemID, int speed, int duration, bool fixedDirection, bool explodes)
        {
            Effects.SendMovingEffect(this, to, itemID, speed, duration, fixedDirection, explodes, 0, 0);
        }

        public void MovingParticles(
            IEntity to,
            int itemID,
            int speed,
            int duration,
            bool fixedDirection,
            bool explodes,
            int hue,
            int renderMode,
            int effect,
            int explodeEffect,
            int explodeSound,
            EffectLayer layer,
            int unknown)
        {
            Effects.SendMovingParticles(
                this,
                to,
                itemID,
                speed,
                duration,
                fixedDirection,
                explodes,
                hue,
                renderMode,
                effect,
                explodeEffect,
                explodeSound,
                layer,
                unknown);
        }

        public void MovingParticles(
            IEntity to,
            int itemID,
            int speed,
            int duration,
            bool fixedDirection,
            bool explodes,
            int hue,
            int renderMode,
            int effect,
            int explodeEffect,
            int explodeSound,
            int unknown)
        {
            Effects.SendMovingParticles(
                this,
                to,
                itemID,
                speed,
                duration,
                fixedDirection,
                explodes,
                hue,
                renderMode,
                effect,
                explodeEffect,
                explodeSound,
                (EffectLayer)255,
                unknown);
        }

        public void MovingParticles(
            IEntity to,
            int itemID,
            int speed,
            int duration,
            bool fixedDirection,
            bool explodes,
            int effect,
            int explodeEffect,
            int explodeSound,
            int unknown)
        {
            Effects.SendMovingParticles(
                this, to, itemID, speed, duration, fixedDirection, explodes, effect, explodeEffect, explodeSound, unknown);
        }

        public void MovingParticles(
            IEntity to,
            int itemID,
            int speed,
            int duration,
            bool fixedDirection,
            bool explodes,
            int effect,
            int explodeEffect,
            int explodeSound)
        {
            Effects.SendMovingParticles(
                this, to, itemID, speed, duration, fixedDirection, explodes, 0, 0, effect, explodeEffect, explodeSound, 0);
        }

        public void FixedEffect(int itemID, int speed, int duration, int hue, int renderMode)
        {
            Effects.SendTargetEffect(this, itemID, speed, duration, hue, renderMode);
        }

        public void FixedEffect(int itemID, int speed, int duration)
        {
            Effects.SendTargetEffect(this, itemID, speed, duration, 0, 0);
        }

        public void FixedParticles(
            int itemID, int speed, int duration, int effect, int hue, int renderMode, EffectLayer layer, int unknown)
        {
            Effects.SendLocationParticles(this, itemID, speed, duration, hue, renderMode, effect, unknown);
        }

        public void FixedParticles(
            int itemID, int speed, int duration, int effect, int hue, int renderMode, EffectLayer layer)
        {
            Effects.SendLocationParticles(this, itemID, speed, duration, hue, renderMode, effect, 0);
        }

        public void FixedParticles(int itemID, int speed, int duration, int effect, EffectLayer layer, int unknown)
        {
            Effects.SendLocationParticles(this, itemID, speed, duration, 0, 0, effect, unknown);
        }

        public void FixedParticles(int itemID, int speed, int duration, int effect, EffectLayer layer)
        {
            Effects.SendLocationParticles(this, itemID, speed, duration, 0, 0, effect, 0);
        }

        public void BoltEffect(int hue)
        {
            Effects.SendBoltEffect(this, true, hue);
        }
        #endregion

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

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

            writer.Write(0); // version

            writer.Write(m_StartID);
            writer.Write(m_HalfHitsID);
            writer.Write(m_DestroyedID);
            writer.Write((int)m_ItemLevel);
            writer.Write(m_Hits);
            writer.Write(m_HitsMax);
            writer.Write(Destroyed);

            writer.Write(ResistBasePhys);
            writer.Write(ResistBaseFire);
            writer.Write(ResistBaseCold);
            writer.Write(ResistBasePoison);
            writer.Write(ResistBaseEnergy);
        }

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

            int version = reader.ReadInt();

            m_StartID = reader.ReadInt();
            m_HalfHitsID = reader.ReadInt();
            m_DestroyedID = reader.ReadInt();
            m_ItemLevel = (ItemLevel)reader.ReadInt();
            m_Hits = reader.ReadInt();
            m_HitsMax = reader.ReadInt();
            Destroyed = reader.ReadBool();

            ResistBasePhys = reader.ReadInt();
            ResistBaseFire = reader.ReadInt();
            ResistBaseCold = reader.ReadInt();
            ResistBasePoison = reader.ReadInt();
            ResistBaseEnergy = reader.ReadInt();
        }
    }

    public class TestDamageableItem : DamageableItem
    {
        [Constructable]
        public TestDamageableItem(int itemid)
            : base(itemid, itemid)
        {
            Name = "Test Damageable Item";
        }

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

        public override void Serialize(GenericWriter writer)
        {
            base.Serialize(writer);
            writer.Write(0); // version
        }

        public override void Deserialize(GenericReader reader)
        {
            base.Deserialize(reader);
            int version = reader.ReadInt();
        }
    }
}