using System;
using System.Collections.Generic;
using Creaturelib.Generated;
using Pkmnlib;
using Pkmnlib.Generated;
using PkmnLibSharp.Utilities;
using EvolutionData = PkmnLibSharp.Library.Evolution.EvolutionData;
using Gender = PkmnLibSharp.Library.Gender;
using Random = PkmnLibSharp.Utilities.Random;

namespace PkmnLibSharp.Library
{
    public class Species : PointerWrapper
    {
        internal Species(IntPtr ptr) : base(ptr)
        {
        }

        public Species(ushort id, string name, Forme defaultForme, float genderRatio, string growthRate,
            byte captureRate, byte baseHappiness)
        {
            var ptr = IntPtr.Zero;
            PokemonSpecies.Construct(ref ptr, id, name.ToPtr(), defaultForme.Ptr, genderRatio,
                growthRate.ToPtr(), captureRate, baseHappiness).Assert();
            _formes.Add("default", defaultForme);
            Initialize(ptr);
        }

        public ushort Id => CreatureSpecies.GetId(Ptr);
        public float GenderRate => CreatureSpecies.GetGenderRate(Ptr);
        public byte CaptureRate => CreatureSpecies.GetCaptureRate(Ptr);
        public string Name => _name ??= CreatureSpecies.GetName(Ptr).PtrString()!;
        public string GrowthRate => _growthRate ??= CreatureSpecies.GetGrowthRate(Ptr).PtrString()!;

        public ReadOnlyNativePtrArray<EvolutionData> Evolutions
        {
            get
            {
                if (_evolutions != null) return _evolutions;
                var ptr = IntPtr.Zero;
                PokemonSpecies.GetEvolutions(Ptr, ref ptr);
                var length = PokemonSpecies.GetEvolutionCount(Ptr);
                _evolutions = new ReadOnlyNativePtrArray<EvolutionData>(ptr, (int) length);
                return _evolutions;
            }
        }

        public bool HasForme(string s)
        {
            return CreatureSpecies.HasVariant(Ptr, s.ToPtr()) == MarshalHelper.True;
        }

        public bool TryGetForme(string s, out Forme? forme)
        {
            if (_formes.TryGetValue(s, out forme))
                return true;
            var ptr = IntPtr.Zero;
            if (CreatureSpecies.TryGetVariant(Ptr, s.ToPtr(), ref ptr) == MarshalHelper.True)
            {
                if (TryResolvePointer(ptr, out forme))
                {
                    _formes.Add(s, forme!);
                    return true;
                }

                forme = new Forme(ptr);
                _formes.Add(s, forme);
                return true;
            }

            return false;
        }

        public Forme GetForme(string s)
        {
            if (_formes.TryGetValue(s, out var forme))
                return forme;
            var ptr = IntPtr.Zero;
            CreatureSpecies.GetVariant(ref ptr, Ptr, s.ToPtr()).Assert();
            if (TryResolvePointer(ptr, out Forme? f))
            {
                _formes.Add(s, f!);
                return f!;
            }
            forme = new Forme(ptr);
            _formes.Add(s, forme);
            return forme;
        }
        
        public void SetForme(string s, Forme forme)
        {
            _formes.Add(s, forme);
            CreatureSpecies.SetVariant(Ptr, s.ToPtr(), forme.Ptr).Assert();
        }

        public Gender GetRandomGender(Random random)
        {
            return (Gender) CreatureSpecies.GetRandomGender(Ptr, random.Ptr);
        }

        public void AddEvolution(EvolutionData evolutionData)
        {
            Pkmnlib.Generated.PokemonSpecies.AddEvolution(Ptr, evolutionData.Ptr);
        }
        
        private string? _name;
        private string? _growthRate;

        private readonly Dictionary<string, Forme> _formes =
            new Dictionary<string, Forme>(StringComparer.InvariantCultureIgnoreCase);

        private ReadOnlyNativePtrArray<EvolutionData>? _evolutions;

        protected internal override void MarkAsDeleted()
        {
            base.MarkAsDeleted();
            foreach (var forme in _formes)
            {
                forme.Value.MarkAsDeleted();
            }
        }

        protected override void DeletePtr()
        {
            PokemonSpecies.Destruct(Ptr);
        }
    }
}