using System;

namespace PKHeX.Core
{
    /// <summary>
    /// Pokémon Link Encounter Data
    /// </summary>
    public sealed class EncounterLink : IEncounterable, IRibbonSetEvent4, IMoveset, ILocation, IVersion
    {
        public int Species { get; set; }
        public int Level { get; set; }
        public int LevelMin => Level;
        public int LevelMax => Level;
        public int Location { get; set; } = 30011;
        public int Ability { get; set; } = 1;
        public int Ball { get; set; } = 4; // Pokéball
        public int[] RelearnMoves { get; set; } = Array.Empty<int>();
        public bool OT { get; set; } = true; // Receiver is OT?

        public bool EggEncounter => false;
        public int EggLocation { get => 0; set { } }
        public GameVersion Version { get; set; } = GameVersion.Gen6;

        public int[] Moves { get; set; } = Array.Empty<int>();

        public string Name => "Pokémon Link Gift";

        public bool RibbonClassic { get; set; } = true;

        // Unused
        public bool RibbonWishing { get; set; }
        public bool RibbonPremier { get; set; }
        public bool RibbonEvent { get; set; }
        public bool RibbonBirthday { get; set; }
        public bool RibbonSpecial { get; set; }
        public bool RibbonWorld { get; set; }
        public bool RibbonChampionWorld { get; set; }
        public bool RibbonSouvenir { get; set; }

        public PKM ConvertToPKM(ITrainerInfo SAV) => ConvertToPKM(SAV, EncounterCriteria.Unrestricted);

        public PKM ConvertToPKM(ITrainerInfo SAV, EncounterCriteria criteria)
        {
            const int gen = 6;
            var version = this.GetCompatibleVersion((GameVersion)SAV.Game);
            int lang = (int)Legal.GetSafeLanguage(6, (LanguageID)SAV.Language);
            var pk = new PK6
            {
                EncryptionConstant = Util.Rand32(),
                Species = Species,
                Language = lang,
                CurrentLevel = Level,
                Version = (int)version,
                PID = Util.Rand32(),
                Nickname = PKX.GetSpeciesNameGeneration(Species, lang, gen),
                Ball = Ball,
            };

            SAV.ApplyToPKM(pk);
            SetMetData(pk);
            SetNatureGender(pk, criteria);
            pk.RefreshAbility(Ability >> 1);
            pk.SetRandomIVs(flawless: 3);

            pk.Version = (int)version;
            pk.Language = lang;

            pk.Moves = Moves;
            pk.SetMaximumPPCurrent(Moves);
            pk.OT_Friendship = pk.PersonalInfo.BaseFriendship;

            if (RelearnMoves.Length > 0)
                pk.RelearnMoves = RelearnMoves;
            if (RibbonClassic)
                pk.RibbonClassic = true;

            pk.SetRandomMemory6();
            if (!OT)
                SAV.ApplyHandlingTrainerInfo(pk);

            return pk;
        }

        private static void SetNatureGender(PKM pk, EncounterCriteria criteria)
        {
            pk.Nature = (int)criteria.GetNature(Nature.Random);
            pk.Gender = criteria.GetGender(-1, pk.PersonalInfo);
        }

        private void SetMetData(PKM pk)
        {
            pk.MetDate = DateTime.Today;
            pk.Met_Level = Level;
            pk.Met_Location = Location;
        }
    }
}