using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using BuzzGUI.Interfaces;

namespace BuzzGUI.Common.InterfaceExtensions
{
	public static class PatternColumnExtensions
	{
		public static IEnumerable<PatternEvent> GetGridMIDINoteOnEvents(this IPatternColumn pc, int columncount, int step, IEnumerable<int> notelist)
		{
			return pc.GetEvents(0, columncount * step).Where(e => e.Time % step == 0 && MIDI.IsNoteOn(e.Value, notelist));
		}

		public static void RemapValues(this IPatternColumn pc, IDictionary<int, int> map)
		{
			var oldvalues = pc.GetEvents(int.MinValue, int.MaxValue).ToArray();
			pc.SetEvents(oldvalues, false);
			pc.SetEvents(oldvalues.Select(e => new PatternEvent(e.Time, map.ContainsKey(e.Value) ? map[e.Value] : e.Value, e.Duration)), true);
		}

		public static IEnumerable<int> GetRowTimes(this IPatternColumn pc, int beatIndex, int subdivision)
		{
			return Enumerable.Range(0, subdivision).Select(t => beatIndex * PatternEvent.TimeBase * 4 + PatternEvent.TimeBase * 4 * t / subdivision);
		}

		public static IEnumerable<int> GetRowTimes(this IPatternColumn pc, int beatIndex)
		{
			int subdiv;
			if (!pc.BeatSubdivision.TryGetValue(beatIndex, out subdiv))
				subdiv = 4;

			return pc.GetRowTimes(beatIndex, subdiv);
		}

	}
}