using Strata.SqlTools.SqlBreakdown.Interfaces.Core;

using Strata.SqlTools.SqlBreakdown.Expressions.Conditional;

namespace Strata.SqlTools.SqlBreakdown.Expressions.Functions.Conditional;

/// <summary>
/// Single-level if-then-else expression. Similar to <see cref="CaseExpression"/>, but only allows a single condition.
/// </summary>
public class IfThenElseExpression : ConditionalFunctionExpression
{
    public override string FunctionName => "IFF";

    public BooleanExpression Condition { get; }
    public Expression ResultIfTrue { get; }
    public Expression ResultIfFalse { get; }

    public IfThenElseExpression(BooleanExpression condition, Expression resultIfTrue, Expression resultIfFalse) : base(condition, resultIfTrue, resultIfFalse)
    {
        Condition = condition;
        ResultIfTrue = resultIfTrue;
        ResultIfFalse = resultIfFalse;
    }

    public override T Accept<T>(IVisitor<T> visitor)
    {
        return visitor.VisitFunctionExpression(this);
    }
}