using Rubberduck.Parsing.Abstract;

namespace Rubberduck.Parsing.Expressions
{
    public sealed class LogicalGreaterThanExpression : Expression
    {
        private readonly IExpression _left;
        private readonly IExpression _right;

        public LogicalGreaterThanExpression(IExpression left, IExpression right)
        {
            _left = left;
            _right = right;
        }

        public override IValue Evaluate()
        {
            var lt = new LogicalLessThanExpression(_left, _right).Evaluate();
            var eq = new LogicalEqualsExpression(_left, _right).Evaluate();
            if (lt == null || eq == null)
            {
                return null;
            }
            return new BoolValue(!lt.AsBool && !eq.AsBool);
        }
    }
}
