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

namespace AspClassic.Scripting.Utils;

internal class DictionaryUnionEnumerator : CheckedDictionaryEnumerator
{
	private IList<IDictionaryEnumerator> _enums;

	private int _current;

	public DictionaryUnionEnumerator(IList<IDictionaryEnumerator> enums)
	{
		_enums = enums;
	}

	protected override object GetKey()
	{
		return _enums[_current].Key;
	}

	protected override object GetValue()
	{
		return _enums[_current].Value;
	}

	protected override bool DoMoveNext()
	{
		if (_current == _enums.Count)
		{
			return false;
		}
		if (_enums[_current].MoveNext())
		{
			return true;
		}
		_current++;
		return DoMoveNext();
	}

	protected override void DoReset()
	{
		for (int i = 0; i < _enums.Count; i++)
		{
			_enums[i].Reset();
		}
		_current = 0;
	}
}