ModernUO/Projects/UOContent/Mobiles/AI/MeleeAI.cs

namespace Server.Mobiles
{
    public class MeleeAI : BaseAI
    {
        public MeleeAI(BaseCreature m) : base(m)
        {
        }

        public override bool DoActionWander()
        {
            m_Mobile.DebugSay("I have no combatant");

            if (AcquireFocusMob(m_Mobile.RangePerception, m_Mobile.FightMode, false, false, true))
            {
                if (m_Mobile.Debug)
                {
                    m_Mobile.DebugSay("I have detected {0}, attacking", m_Mobile.FocusMob.Name);
                }

                m_Mobile.Combatant = m_Mobile.FocusMob;
                Action = ActionType.Combat;
            }
            else
            {
                base.DoActionWander();
            }

            return true;
        }

        public override bool DoActionCombat()
        {
            var combatant = m_Mobile.Combatant;

            if (combatant?.Deleted != false || combatant.Map != m_Mobile.Map || !combatant.Alive ||
                combatant.IsDeadBondedPet)
            {
                m_Mobile.DebugSay("My combatant is gone, so my guard is up");

                Action = ActionType.Guard;

                return true;
            }

            if (!m_Mobile.InRange(combatant, m_Mobile.RangePerception))
            {
                // They are somewhat far away, can we find something else?

                if (AcquireFocusMob(m_Mobile.RangePerception, m_Mobile.FightMode, false, false, true))
                {
                    m_Mobile.Combatant = m_Mobile.FocusMob;
                    m_Mobile.FocusMob = null;
                }
                else if (!m_Mobile.InRange(combatant, m_Mobile.RangePerception * 3))
                {
                    m_Mobile.Combatant = null;
                }

                combatant = m_Mobile.Combatant;

                if (combatant == null)
                {
                    m_Mobile.DebugSay("My combatant has fled, so I am on guard");
                    Action = ActionType.Guard;

                    return true;
                }
            }

            if (!MoveTo(combatant, true, m_Mobile.RangeFight))
            {
                if (AcquireFocusMob(m_Mobile.RangePerception, m_Mobile.FightMode, false, false, true))
                {
                    if (m_Mobile.Debug)
                    {
                        m_Mobile.DebugSay("My move is blocked, so I am going to attack {0}", m_Mobile.FocusMob?.Name ?? "null");
                    }

                    m_Mobile.Combatant = m_Mobile.FocusMob;
                    Action = ActionType.Combat;

                    return true;
                }

                if (m_Mobile.GetDistanceToSqrt(combatant) > m_Mobile.RangePerception + 1)
                {
                    if (m_Mobile.Debug)
                    {
                        m_Mobile.DebugSay("I cannot find {0}, so my guard is up", combatant.Name);
                    }

                    Action = ActionType.Guard;

                    return true;
                }

                if (m_Mobile.Debug)
                {
                    m_Mobile.DebugSay("I should be closer to {0}", combatant.Name);
                }
            }

            if (!m_Mobile.Controlled && !m_Mobile.Summoned && m_Mobile.CanFlee)
            {
                if (m_Mobile.Hits < m_Mobile.HitsMax * 20 / 100)
                {
                    // We are low on health, should we flee?

                    bool flee;

                    if (m_Mobile.Hits < combatant.Hits)
                    {
                        // We are more hurt than them

                        var diff = combatant.Hits - m_Mobile.Hits;

                        flee = Utility.Random(0, 100) < 10 + diff; // (10 + diff)% chance to flee
                    }
                    else
                    {
                        flee = Utility.Random(0, 100) < 10; // 10% chance to flee
                    }

                    if (flee)
                    {
                        if (m_Mobile.Debug)
                        {
                            m_Mobile.DebugSay("I am going to flee from {0}", combatant.Name);
                        }

                        Action = ActionType.Flee;
                    }
                }
            }

            return true;
        }

        public override bool DoActionGuard()
        {
            if (AcquireFocusMob(m_Mobile.RangePerception, m_Mobile.FightMode, false, false, true))
            {
                if (m_Mobile.Debug)
                {
                    m_Mobile.DebugSay("I have detected {0}, attacking", m_Mobile.FocusMob.Name);
                }

                m_Mobile.Combatant = m_Mobile.FocusMob;
                Action = ActionType.Combat;
            }
            else
            {
                base.DoActionGuard();
            }

            return true;
        }

        public override bool DoActionFlee()
        {
            if (m_Mobile.Hits > m_Mobile.HitsMax / 2)
            {
                m_Mobile.DebugSay("I am stronger now, so I will continue fighting");
                Action = ActionType.Combat;
            }
            else
            {
                m_Mobile.FocusMob = m_Mobile.Combatant;
                base.DoActionFlee();
            }

            return true;
        }
    }
}