using System;
using System.Runtime.CompilerServices;
using Manager;
using MoreChartFormats.MaiSxt.Structures;

namespace MoreChartFormats.MaiSxt;

public class SrtReader(NotesReferences refs) : SxtReaderBase(refs)
{
    [MethodImpl(MethodImplOptions.AggressiveInlining)]
    protected override void LoadRow(int rowIdx, in SxtRow row)
    {
        var rowTime = row.NotesTime(Refs.Reader);
        var note = new NoteData
        {
            type = row.NoteType switch
            {
                0 when row.SlideId != 0 => NotesTypeID.Def.Star,
                0 => NotesTypeID.Def.Tap,
                2 => NotesTypeID.Def.Hold,
                4 when row.SlideId != 0 => NotesTypeID.Def.BreakStar,
                4 => NotesTypeID.Def.Break,
                128 => NotesTypeID.Def.Slide,
                _ => throw new Exception($"Unknown note type ID {row.NoteType} at row {rowIdx}, expected 0/2/4/128")
            },
            startButtonPos = row.Position,
            time = rowTime,
            end = rowTime,
            beatType = ParserUtilities.GetBeatType(rowTime.grid),
            index = rowIdx,
            indexNote = NoteIndex
        };
        
        if (note.type.isHold())
        {
            note.end += ParserUtilities.NotesTimeFromBars(Refs, row.HoldDuration);
            note.end.calcMsec(Refs.Reader);
        }

        if (note.type.isSlide())
        {
            if (!SlideHeads.TryGetValue(row.SlideId, out var starNoteRow))
            {
                throw new Exception($"Slide body (ID {row.SlideId}) declared without or before its head");
            }

            note.startButtonPos = starNoteRow.Position;
            note.slideData = new SlideData
            {
                type = row.SlidePattern switch
                {
                    0 => SlideType.Slide_Straight,
                    1 => SlideType.Slide_Circle_R,
                    2 => SlideType.Slide_Circle_L,
                    _ => throw new Exception($"Unknown slide type {row.SlidePattern} at row {rowIdx}, expected 0/1/2"),
                },
                index = row.SlideId,
                targetNote = row.Position,
                shoot = new TimingBase { index = rowIdx },
                arrive = new TimingBase { index = rowIdx },
            };

            note.time = starNoteRow.NotesTime(Refs.Reader);
            note.beatType = ParserUtilities.GetBeatType(note.time.grid);
            note.slideData.shoot.time = note.time + starNoteRow.SlideDelayNotesTime(Refs);
            note.slideData.shoot.time.calcMsec(Refs.Reader);
            note.slideData.arrive.time.copy(rowTime);
            note.end.copy(rowTime);
        }

        if (note.type.isStar())
        {
            SlideHeads[row.SlideId] = row;
        }

        Refs.Notes._noteData.Add(note);
        NoteIndex++;
    }
}