using System;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.Linq;
using PkmnLibSharp.Utils;
using Interface = PkmnLibSharp.FFI.StaticData.Species;

namespace PkmnLibSharp.StaticData
{
    public class Species : HandleType
    {
        protected Species(FFIHandle handle) : base(handle)
        {
        }

        public static Species Create(ushort id, string name, float genderRate, string growthRate, byte captureRate, Form defaultForm,
            IReadOnlyCollection<string> flags)
        {
            var flagsPtrArray = flags.Select(x => x.ToPtr()).ToArray();
            var handle = Interface.species_new(id, name.ToPtr(), genderRate, growthRate.ToPtr(), captureRate,
                defaultForm.Handle, flagsPtrArray.ArrayPtr(), (ulong)flags.Count);
            var species = Resolver.Instance.ResolveSpecies(handle.Result().Resolve());
            species._forms.Add("default", defaultForm);
            return species;
        }

        private ushort? _id;
        public ushort Id => _id ??= Interface.species_id(Handle);
        private string? _name;
        public string Name => _name ??= Interface.species_name(Handle).PtrString()!;
        private float? _genderRate;
        public float GenderRate => _genderRate ??= Interface.species_gender_rate(Handle);
        private string? _growthRate;
        public string GrowthRate => _growthRate ??= Interface.species_growth_rate(Handle).PtrString()!;
        private byte? _captureRate;
        public byte CaptureRate => _captureRate ??= Interface.species_capture_rate(Handle);
        
        public Form DefaultForm
        {
            get
            {
                TryGetForm("default", out var form);
                return form!;
            }
        }

        private Dictionary<string, Form> _forms = new(StringComparer.InvariantCultureIgnoreCase);
        public bool TryGetForm(string formName, [NotNullWhen(true)] out Form? form)
        {
            if (_forms.TryGetValue(formName, out form))
                return true;
            var formPtr = Interface.species_get_form(Handle, formName.ToPtr());
            if (formPtr.Handle == 0)
            {
                form = null;
                return false;
            }

            form = Resolver.Instance.ResolveForm(formPtr.Resolve());
            _forms.Add(formName, form);
            return true;
        }

        public void AddForm(Form form)
        {
            Interface.species_add_form(Handle, form.Name.ToPtr(), form.Handle).Result();
            _forms.Add(form.Name, form);
        }

        public Gender GetRandomGender(ulong seed) => Interface.species_get_random_gender(Handle, seed);
    }
}