using System;
using JetBrains.Annotations;
using PkmnLibSharp.Utils;
using Interface = PkmnLibSharp.FFI.StaticData.StaticStatisticSet;

namespace PkmnLibSharp.StaticData
{
    public class StaticStatisticSet<T> : ExternPointer<StaticStatisticSet<T>.CacheData> where T : struct, IConvertible
    {
        public class CacheData
        {
            public T? HP { get; internal set; }
            public T? Attack { get; internal set; }
            public T? Defense { get; internal set; }
            public T? SpecialAttack { get; internal set; }
            public T? SpecialDefense { get; internal set; }
            public T? Speed { get; internal set; }
        }

        public StaticStatisticSet(T hp, T attack, T defense, T specialAttack, T specialDefense, T speed)
        {
            var p = typeof(T) switch
            {
                { } t when t == typeof(byte) => Interface.static_statistic_set_u8_new(Convert.ToByte(hp),
                    Convert.ToByte(attack), Convert.ToByte(defense), Convert.ToByte(specialAttack),
                    Convert.ToByte(specialDefense), Convert.ToByte(speed)),
                { } t when t == typeof(ushort) => Interface.static_statistic_set_u16_new(Convert.ToUInt16(hp),
                    Convert.ToUInt16(attack), Convert.ToUInt16(defense), Convert.ToUInt16(specialAttack),
                    Convert.ToUInt16(specialDefense), Convert.ToUInt16(speed)),
                { } t when t == typeof(uint) => Interface.static_statistic_set_u32_new(Convert.ToUInt32(hp),
                    Convert.ToUInt32(attack), Convert.ToUInt32(defense), Convert.ToUInt32(specialAttack),
                    Convert.ToUInt32(specialDefense), Convert.ToUInt32(speed)),
                { } t when t == typeof(sbyte) => Interface.static_statistic_set_i8_new(Convert.ToSByte(hp),
                    Convert.ToSByte(attack), Convert.ToSByte(defense), Convert.ToSByte(specialAttack),
                    Convert.ToSByte(specialDefense), Convert.ToSByte(speed)),
                { } t when t == typeof(short) => Interface.static_statistic_set_i16_new(Convert.ToInt16(hp),
                    Convert.ToInt16(attack), Convert.ToInt16(defense), Convert.ToInt16(specialAttack),
                    Convert.ToInt16(specialDefense), Convert.ToInt16(speed)),
                { } t when t == typeof(int) => Interface.static_statistic_set_i32_new(Convert.ToInt32(hp),
                    Convert.ToInt32(attack), Convert.ToInt32(defense), Convert.ToInt32(specialAttack),
                    Convert.ToInt32(specialDefense), Convert.ToInt32(speed)),
                _ => throw new ArgumentOutOfRangeException()
            };
            InitializePointer(p, true);
        }

        [PublicAPI]
        public T GetStatistic(Statistic statistic)
        {
            switch (statistic)
            {
                case Statistic.HP when Cache.HP.HasValue:
                    return Cache.HP.Value;
                case Statistic.Attack when Cache.Attack.HasValue:
                    return Cache.Attack.Value;
                case Statistic.Defense when Cache.Defense.HasValue:
                    return Cache.Defense.Value;
                case Statistic.SpecialAttack when Cache.SpecialAttack.HasValue:
                    return Cache.SpecialAttack.Value;
                case Statistic.SpecialDefense when Cache.SpecialDefense.HasValue:
                    return Cache.SpecialDefense.Value;
                case Statistic.Speed when Cache.Speed.HasValue:
                    return Cache.Speed.Value;
            }

            object p = typeof(T) switch
            {
                { } t when t == typeof(byte) => Interface.static_statistic_set_u8_get_stat(Ptr, statistic),
                { } t when t == typeof(ushort) => Interface.static_statistic_set_u16_get_stat(Ptr, statistic),
                { } t when t == typeof(uint) => Interface.static_statistic_set_u32_get_stat(Ptr, statistic),
                { } t when t == typeof(sbyte) => Interface.static_statistic_set_i8_get_stat(Ptr, statistic),
                { } t when t == typeof(short) => Interface.static_statistic_set_i16_get_stat(Ptr, statistic),
                { } t when t == typeof(int) => Interface.static_statistic_set_i32_get_stat(Ptr, statistic),
                _ => throw new ArgumentOutOfRangeException()
            };
            switch (statistic)
            {
                case Statistic.HP:
                    Cache.HP = (T)p;
                    break;
                case Statistic.Attack:
                    Cache.Attack = (T)p;
                    break;
                case Statistic.Defense:
                    Cache.Defense = (T)p;
                    break;
                case Statistic.SpecialAttack:
                    Cache.SpecialAttack = (T)p;
                    break;
                case Statistic.SpecialDefense:
                    Cache.SpecialDefense = (T)p;
                    break;
                case Statistic.Speed:
                    Cache.Speed = (T)p;
                    break;
            }

            return (T)p;
        }

        public T HP => GetStatistic(Statistic.HP);

        public T Attack => GetStatistic(Statistic.Attack);

        public T Defense => GetStatistic(Statistic.Defense);

        public T SpecialAttack => GetStatistic(Statistic.SpecialAttack);

        public T SpecialDefense => GetStatistic(Statistic.SpecialDefense);

        public T Speed => GetStatistic(Statistic.Speed);


        protected override CacheData CreateCache()
        {
            return new CacheData();
        }

        protected override void Destructor()
        {
            if (typeof(T) == typeof(byte)) Interface.static_statistic_set_u8_drop(Ptr);
            else if (typeof(T) == typeof(ushort)) Interface.static_statistic_set_u16_drop(Ptr);
            else if (typeof(T) == typeof(uint)) Interface.static_statistic_set_u32_drop(Ptr);
            else if (typeof(T) == typeof(sbyte)) Interface.static_statistic_set_i8_drop(Ptr);
            else if (typeof(T) == typeof(short)) Interface.static_statistic_set_i16_drop(Ptr);
            else if (typeof(T) == typeof(int)) Interface.static_statistic_set_i32_drop(Ptr);
        }
    }
}