using System;
using Server.Misc;

namespace Server.Engines.Plants
{
    public enum PlantHealth
    {
        Dying,
        Wilted,
        Healthy,
        Vibrant
    }

    public enum PlantGrowthIndicator
    {
        None,
        InvalidLocation,
        NotHealthy,
        Delay,
        Grown,
        DoubleGrown
    }

    public class PlantSystem
    {
        public static readonly TimeSpan CheckDelay = TimeSpan.FromHours(23.0);

        private int m_AvailableResources;
        private int m_AvailableSeeds;
        private int m_CurePotion;
        private int m_Disease;
        private int m_Fungus;
        private int m_HealPotion;

        private int m_Hits;
        private int m_Infestation;
        private int m_LeftResources;
        private int m_LeftSeeds;
        private int m_Poison;
        private int m_PoisonPotion;
        private PlantHue m_SeedHue;

        private PlantType m_SeedType;
        private int m_StrengthPotion;

        private int m_Water;

        public PlantSystem(PlantItem plant, bool fertileDirt)
        {
            Plant = plant;
            FertileDirt = fertileDirt;

            NextGrowth = Core.Now + CheckDelay;
            GrowthIndicator = PlantGrowthIndicator.None;
            m_Hits = MaxHits;
            m_LeftSeeds = 8;
            m_LeftResources = 8;
        }

        public PlantSystem(PlantItem plant, IGenericReader reader)
        {
            Plant = plant;

            var version = reader.ReadInt();

            FertileDirt = reader.ReadBool();

            if (version >= 1)
            {
                NextGrowth = reader.ReadDateTime();
            }
            else
            {
                NextGrowth = reader.ReadDeltaTime();
            }

            GrowthIndicator = (PlantGrowthIndicator)reader.ReadInt();

            m_Water = reader.ReadInt();

            m_Hits = reader.ReadInt();
            m_Infestation = reader.ReadInt();
            m_Fungus = reader.ReadInt();
            m_Poison = reader.ReadInt();
            m_Disease = reader.ReadInt();
            m_PoisonPotion = reader.ReadInt();
            m_CurePotion = reader.ReadInt();
            m_HealPotion = reader.ReadInt();
            m_StrengthPotion = reader.ReadInt();

            Pollinated = reader.ReadBool();
            m_SeedType = (PlantType)reader.ReadInt();
            m_SeedHue = (PlantHue)reader.ReadInt();
            m_AvailableSeeds = reader.ReadInt();
            m_LeftSeeds = reader.ReadInt();

            m_AvailableResources = reader.ReadInt();
            m_LeftResources = reader.ReadInt();

            if (version < 2 && PlantHueInfo.IsCrossable(m_SeedHue))
            {
                m_SeedHue |= PlantHue.Reproduces;
            }
        }

        public PlantItem Plant { get; }

        public bool FertileDirt { get; set; }

        public DateTime NextGrowth { get; private set; }

        public PlantGrowthIndicator GrowthIndicator { get; private set; }

        public bool IsFullWater => m_Water >= 4;

        public int Water
        {
            get => m_Water;
            set
            {
                m_Water = Math.Clamp(value, 0, 4);
                Plant.InvalidateProperties();
            }
        }

        public int Hits
        {
            get => m_Hits;
            set
            {
                if (m_Hits == value)
                {
                    return;
                }

                m_Hits = Math.Clamp(value, 0, MaxHits);

                if (m_Hits == 0)
                {
                    Plant.Die();
                }

                Plant.InvalidateProperties();
            }
        }

        public int MaxHits => 10 + (int)Plant.PlantStatus * 2;

        public PlantHealth Health
        {
            get
            {
                var perc = m_Hits * 100 / MaxHits;

                if (perc < 33)
                {
                    return PlantHealth.Dying;
                }

                if (perc < 66)
                {
                    return PlantHealth.Wilted;
                }

                return perc < 100 ? PlantHealth.Healthy : PlantHealth.Vibrant;
            }
        }

        public int Infestation
        {
            get => m_Infestation;
            set => m_Infestation = Math.Clamp(value, 0, 2);
        }

        public int Fungus
        {
            get => m_Fungus;
            set => m_Fungus = Math.Clamp(value, 0, 2);
        }

        public int Poison
        {
            get => m_Poison;
            set => m_Poison = Math.Clamp(value, 0, 2);
        }

        public int Disease
        {
            get => m_Disease;
            set => m_Disease = Math.Clamp(value, 0, 2);
        }

        public bool IsFullPoisonPotion => m_PoisonPotion >= 2;

        public int PoisonPotion
        {
            get => m_PoisonPotion;
            set => m_PoisonPotion = Math.Clamp(value, 0, 2);
        }

        public bool IsFullCurePotion => m_CurePotion >= 2;

        public int CurePotion
        {
            get => m_CurePotion;
            set => m_CurePotion = Math.Clamp(value, 0, 2);
        }

        public bool IsFullHealPotion => m_HealPotion >= 2;

        public int HealPotion
        {
            get => m_HealPotion;
            set => m_HealPotion = Math.Clamp(value, 0, 2);
        }

        public bool IsFullStrengthPotion => m_StrengthPotion >= 2;

        public int StrengthPotion
        {
            get => m_StrengthPotion;
            set => m_StrengthPotion = Math.Clamp(value, 0, 2);
        }

        public bool HasMaladies => Infestation > 0 || Fungus > 0 || Poison > 0 || Disease > 0 || Water != 2;

        public bool PollenProducing => Plant.IsCrossable && Plant.PlantStatus >= PlantStatus.FullGrownPlant;

        public bool Pollinated { get; set; }

        public PlantType SeedType
        {
            get => Pollinated ? m_SeedType : Plant.PlantType;
            set => m_SeedType = value;
        }

        public PlantHue SeedHue
        {
            get => Pollinated ? m_SeedHue : Plant.PlantHue;
            set => m_SeedHue = value;
        }

        public int AvailableSeeds
        {
            get => m_AvailableSeeds;
            set
            {
                if (value >= 0)
                {
                    m_AvailableSeeds = value;
                }
            }
        }

        public int LeftSeeds
        {
            get => m_LeftSeeds;
            set
            {
                if (value >= 0)
                {
                    m_LeftSeeds = value;
                }
            }
        }

        public int AvailableResources
        {
            get => m_AvailableResources;
            set
            {
                if (value >= 0)
                {
                    m_AvailableResources = value;
                }
            }
        }

        public int LeftResources
        {
            get => m_LeftResources;
            set
            {
                if (value >= 0)
                {
                    m_LeftResources = value;
                }
            }
        }

        public void Reset(bool potions)
        {
            NextGrowth = Core.Now + CheckDelay;
            GrowthIndicator = PlantGrowthIndicator.None;

            Hits = MaxHits;
            m_Infestation = 0;
            m_Fungus = 0;
            m_Poison = 0;
            m_Disease = 0;

            if (potions)
            {
                m_PoisonPotion = 0;
                m_CurePotion = 0;
                m_HealPotion = 0;
                m_StrengthPotion = 0;
            }

            Pollinated = false;
            m_AvailableSeeds = 0;
            m_LeftSeeds = 8;

            m_AvailableResources = 0;
            m_LeftResources = 8;
        }

        public int GetLocalizedDirtStatus() =>
            Water switch
            {
                <= 1 => 1060826, // hard
                <= 2 => 1060827, // soft
                <= 3 => 1060828, // squishy
                _    => 1060829  // sappy wet
            };

        public int GetLocalizedHealth()
        {
            return Health switch
            {
                PlantHealth.Dying   => 1060825, // dying
                PlantHealth.Wilted  => 1060824, // wilted
                PlantHealth.Healthy => 1060823, // healthy
                _                   => 1060822  // vibrant
            };
        }

        public static void Configure()
        {
            EventSink.WorldLoad += EventSink_WorldLoad;

            if (!AutoRestart.Enabled)
            {
                EventSink.WorldSave += EventSink_WorldSave;
            }

            EventSink.Login += EventSink_Login;
        }

        private static void EventSink_Login(Mobile from)
        {
            from.Backpack?.FindItemsByType<PlantItem>()
                .ForEach(
                    plant =>
                    {
                        if (plant.IsGrowable)
                        {
                            plant.PlantSystem.DoGrowthCheck();
                        }
                    }
                );

            from.FindBankNoCreate()
                ?.FindItemsByType<PlantItem>()
                .ForEach(
                    plant =>
                    {
                        if (plant.IsGrowable)
                        {
                            plant.PlantSystem.DoGrowthCheck();
                        }
                    }
                );
        }

        public static void GrowAll()
        {
            var plants = PlantItem.Plants;
            var now = Core.Now;

            for (var i = plants.Count - 1; i >= 0; --i)
            {
                var plant = plants[i];

                if (plant.IsGrowable && plant.RootParent is not Mobile && now >= plant.PlantSystem.NextGrowth)
                {
                    plant.PlantSystem.DoGrowthCheck();
                }
            }
        }

        private static void EventSink_WorldLoad()
        {
            GrowAll();
        }

        private static void EventSink_WorldSave()
        {
            GrowAll();
        }

        public void DoGrowthCheck()
        {
            if (!Plant.IsGrowable)
            {
                return;
            }

            var now = Core.Now;

            if (now < NextGrowth)
            {
                GrowthIndicator = PlantGrowthIndicator.Delay;
                return;
            }

            NextGrowth = now + CheckDelay;

            if (!Plant.ValidGrowthLocation)
            {
                GrowthIndicator = PlantGrowthIndicator.InvalidLocation;
                return;
            }

            if (Plant.PlantStatus == PlantStatus.BowlOfDirt)
            {
                if (Water > 2 || Utility.RandomDouble() < 0.9)
                {
                    Water--;
                }

                return;
            }

            ApplyBeneficialEffects();

            if (!ApplyMaladiesEffects()) // Dead
            {
                return;
            }

            Grow();

            UpdateMaladies();
        }

        private void ApplyBeneficialEffects()
        {
            if (PoisonPotion >= Infestation)
            {
                PoisonPotion -= Infestation;
                Infestation = 0;
            }
            else
            {
                Infestation -= PoisonPotion;
                PoisonPotion = 0;
            }

            if (CurePotion >= Fungus)
            {
                CurePotion -= Fungus;
                Fungus = 0;
            }
            else
            {
                Fungus -= CurePotion;
                CurePotion = 0;
            }

            if (HealPotion >= Poison)
            {
                HealPotion -= Poison;
                Poison = 0;
            }
            else
            {
                Poison -= HealPotion;
                HealPotion = 0;
            }

            if (HealPotion >= Disease)
            {
                HealPotion -= Disease;
                Disease = 0;
            }
            else
            {
                Disease -= HealPotion;
                HealPotion = 0;
            }

            if (!HasMaladies)
            {
                if (HealPotion > 0)
                {
                    Hits += HealPotion * 7;
                }
                else
                {
                    Hits += 2;
                }
            }

            HealPotion = 0;
        }

        private bool ApplyMaladiesEffects()
        {
            var damage = 0;

            if (Infestation > 0)
            {
                damage += Infestation * Utility.RandomMinMax(3, 6);
            }

            if (Fungus > 0)
            {
                damage += Fungus * Utility.RandomMinMax(3, 6);
            }

            if (Poison > 0)
            {
                damage += Poison * Utility.RandomMinMax(3, 6);
            }

            if (Disease > 0)
            {
                damage += Disease * Utility.RandomMinMax(3, 6);
            }

            if (Water > 2)
            {
                damage += (Water - 2) * Utility.RandomMinMax(3, 6);
            }
            else if (Water < 2)
            {
                damage += (2 - Water) * Utility.RandomMinMax(3, 6);
            }

            Hits -= damage;

            return Plant.IsGrowable && Plant.PlantStatus != PlantStatus.BowlOfDirt;
        }

        private void Grow()
        {
            if (Health < PlantHealth.Healthy)
            {
                GrowthIndicator = PlantGrowthIndicator.NotHealthy;
            }
            else if (FertileDirt && Plant.PlantStatus <= PlantStatus.Stage5 && Utility.RandomDouble() < 0.1)
            {
                var curStage = (int)Plant.PlantStatus;
                Plant.PlantStatus = (PlantStatus)(curStage + 2);

                GrowthIndicator = PlantGrowthIndicator.DoubleGrown;
            }
            else if (Plant.PlantStatus < PlantStatus.Stage9)
            {
                var curStage = (int)Plant.PlantStatus;
                Plant.PlantStatus = (PlantStatus)(curStage + 1);

                GrowthIndicator = PlantGrowthIndicator.Grown;
            }
            else
            {
                if (Pollinated && LeftSeeds > 0 && Plant.Reproduces)
                {
                    LeftSeeds--;
                    AvailableSeeds++;
                }

                if (LeftResources > 0 && PlantResourceInfo.GetInfo(Plant.PlantType, Plant.PlantHue) != null)
                {
                    LeftResources--;
                    AvailableResources++;
                }

                GrowthIndicator = PlantGrowthIndicator.Grown;
            }

            if (Plant.PlantStatus >= PlantStatus.Stage9 && !Pollinated)
            {
                Pollinated = true;
                SeedType = Plant.PlantType;
                SeedHue = Plant.PlantHue;
            }
        }

        private void UpdateMaladies()
        {
            var infestationChance = 0.30 - StrengthPotion * 0.075 + (Water - 2) * 0.10;

            var typeInfo = PlantTypeInfo.GetInfo(Plant.PlantType);
            if (typeInfo.Flowery)
            {
                infestationChance += 0.10;
            }

            if (PlantHueInfo.IsBright(Plant.PlantHue))
            {
                infestationChance += 0.10;
            }

            if (Utility.RandomDouble() < infestationChance)
            {
                Infestation++;
            }

            var fungusChance = 0.15 - StrengthPotion * 0.075 + (Water - 2) * 0.10;

            if (Utility.RandomDouble() < fungusChance)
            {
                Fungus++;
            }

            if (Water > 2 || Utility.RandomDouble() < 0.9)
            {
                Water--;
            }

            if (PoisonPotion > 0)
            {
                Poison += PoisonPotion;
                PoisonPotion = 0;
            }

            if (CurePotion > 0)
            {
                Disease += CurePotion;
                CurePotion = 0;
            }

            StrengthPotion = 0;
        }

        public void Save(IGenericWriter writer)
        {
            writer.Write(2); // version

            writer.Write(FertileDirt);

            writer.Write(NextGrowth);
            writer.Write((int)GrowthIndicator);

            writer.Write(m_Water);

            writer.Write(m_Hits);
            writer.Write(m_Infestation);
            writer.Write(m_Fungus);
            writer.Write(m_Poison);
            writer.Write(m_Disease);
            writer.Write(m_PoisonPotion);
            writer.Write(m_CurePotion);
            writer.Write(m_HealPotion);
            writer.Write(m_StrengthPotion);

            writer.Write(Pollinated);
            writer.Write((int)m_SeedType);
            writer.Write((int)m_SeedHue);
            writer.Write(m_AvailableSeeds);
            writer.Write(m_LeftSeeds);

            writer.Write(m_AvailableResources);
            writer.Write(m_LeftResources);
        }
    }
}