using System;
using System.Collections.Generic;
using System.Linq;

using Melanchall.DryWetMidi.Smf;
using Melanchall.DryWetMidi.Smf.Interaction;

using SBRL.Utilities;

namespace MusicBoxConverter
{
	public class MusicBoxScoreGenerator
	{
		public Vector2 offset { get; set; } = new Vector2(10, 10);
		public Vector2 scaleFactor { get; set; } = new Vector2(0.1f, 4f);

		public int holeSize { get; set; } = 5;


		MidiFile midiFile;
		
		public MusicBoxScoreGenerator(string filename)
		{
			midiFile = MidiFile.Read("/home/sbrl/Music/Sheets/HappyBirthday.midi");
		}

		public void Output(string destinationFilename)
		{
			SvgWriter svg = new SvgWriter(destinationFilename);


			foreach(Note note in AllNotes())
			{
				Console.WriteLine("[{0}] {1}/{2}", note.Time, note.NoteName, note.NoteNumber);
				svg.WriteCircle(
					new Vector2(
						offset.X + note.Time * scaleFactor.X,
						offset.Y + note.NoteNumber * scaleFactor.Y
					),
					holeSize // radius
				);
			}

			svg.Complete();
		}

		public IEnumerable<Note> AllNotes()
		{
			foreach(TrackChunk chunk in midiFile.Chunks.OfType<TrackChunk>())
			{
				using(NotesManager notesManager = new NotesManager(chunk.Events))
				{
					foreach(Note note in notesManager.Notes)
						yield return note;
				}
			}
		}

		public int TrackLength()
		{
			//notesManager.Notes.OfType<TrackChunk>().Select((TrackChunk arg) => arg.Events.O;
			return 1;
		}
	}
}