using System;
using PKHeX.Core;

namespace PKHeX.WinForms.Controls
{
    public partial class PKMEditor
    {
        private void PopulateFieldsPK2()
        {
            if (Entity is not GBPKM pk2 || Entity is not ICaughtData2 c2)
                throw new FormatException(nameof(Entity));

            if (Entity is SK2 sk2)
            {
                var sav = RequestSaveFile;
                CoerceStadium2Language(sk2, sav);
            }
            LoadMisc1(pk2);
            LoadMisc2(pk2);

            TID_Trainer.LoadIDValues(pk2);
            TB_MetLevel.Text = c2.Met_Level.ToString();
            CB_MetLocation.SelectedValue = c2.Met_Location;
            CB_MetTimeOfDay.SelectedIndex = c2.Met_TimeOfDay;

            // Attempt to detect language
            CB_Language.SelectedValue = pk2.GuessedLanguage();

            LoadPartyStats(pk2);
            UpdateStats();
        }

        private static void CoerceStadium2Language(SK2 sk2, SaveFile sav)
        {
            if (sk2.Japanese == (sav.Language == 1))
                return;

            var la = new LegalityAnalysis(sk2);
            if (la.Valid || !sk2.IsPossible(sav.Language == 1))
                return;

            sk2.SwapLanguage();
            la = new LegalityAnalysis(sk2);
            if (la.Valid)
                return;

            var lang = SpeciesName.GetSpeciesNameLanguage(sk2.Species, sk2.Nickname, 2);
            if (lang >= 1 && (lang == 1 != sk2.Japanese)) // force match language
                sk2.SwapLanguage();
            else if (sk2.Japanese != (sav.Language == 1)) // force match save file
                sk2.SwapLanguage();
        }

        private GBPKM PreparePK2()
        {
            if (Entity is not GBPKM pk2 || Entity is not ICaughtData2 c2)
                throw new FormatException(nameof(Entity));

            SaveMisc1(pk2);
            SaveMisc2(pk2);

            c2.Met_Level = Util.ToInt32(TB_MetLevel.Text);
            c2.Met_Location = WinFormsUtil.GetIndex(CB_MetLocation);
            c2.Met_TimeOfDay = CB_MetTimeOfDay.SelectedIndex;

            SavePartyStats(pk2);
            pk2.FixMoves();
            return pk2;
        }
    }
}