using BizHawk.Common;
using BizHawk.Emulation.Cores.Computers.Commodore64.Media;

namespace BizHawk.Emulation.Cores.Computers.Commodore64.Cassette
{
	public class TapeDrive : CassettePortDevice
	{
		private Tape _tape;

		public override void ExecutePhase2()
		{
			if (_tape != null && !ReadMotor())
			{
				_tape.ExecuteCycle();
			}
		}

		public override void HardReset()
		{
			_tape?.Rewind();
		}

		public override bool ReadDataInputBuffer()
		{
			return _tape == null || _tape.Read();
		}

		public override bool ReadSenseBuffer()
		{
			return _tape == null;
		}

		public override void SyncState(Serializer ser)
		{

			if (_tape != null) { _tape.SyncState(ser); }
		}

		public void Insert(Tape tape)
		{
			_tape = tape;
		}

		public void RemoveMedia()
		{
			_tape = null;
		}

		// Exposed for memory domains, should not be used for actual emulation implementation
		public override byte[] TapeDataDomain 
		{
			get
			{
				if (_tape != null)
				{
					return _tape.TapeDataDomain;
				}
				else
				{
					return null;
				}
			}
		}		
	}
}